Collection view's reload data has been changed to reload sections

Fix carthage directions in readme

.jazzy.yml

@@ -0,0 +1,278 @@
+---
+custom_categories:
+- name: RxSwift
+  children:
+  - AnyObserver
+  - Cancelable
+  - ConnectableObservableType
+  - Disposable
+  - Errors
+  - Event
+  - ImmediateSchedulerType
+  - Observable+Extensions
+  - Observable
+  - ObservableConvertibleType
+  - ObservableType
+  - ObserverType
+  - Rx
+  - RxMutableBox
+  - SchedulerType
+- name: RxSwift/Concurrency
+  children:
+  - AsyncLock
+  - Lock
+  - LockOwnerType
+  - SynchronizedDisposeType
+  - SynchronizedOnType
+  - SynchronizedSubscribeType
+  - SynchronizedUnsubscribeType
+- name: RxSwift/DataStructures
+  children:
+  - Bag
+  - InfiniteSequence
+  - PriorityQueue
+  - Queue
+- name: RxSwift/Disposables
+  children:
+  - AnonymousDisposable
+  - BinaryDisposable
+  - BooleanDisposable
+  - CompositeDisposable
+  - DisposeBag
+  - DisposeBase
+  - NAryDisposable
+  - NopDisposable
+  - RefCountDisposable
+  - ScheduledDisposable
+  - SerialDisposable
+  - SingleAssignmentDisposable
+  - StableCompositeDisposable
+  - SubscriptionDisposable
+- name: RxSwift/Extensions
+  children:
+  - String+Rx
+- name: RxSwift/Observables/Implementations
+  children:
+  - AddRef
+  - Amb
+  - AnonymousObservable
+  - Buffer
+  - Catch
+  - CombineLatest+arity
+  - CombineLatest+CollectionType
+  - CombineLatest
+  - Concat
+  - ConnectableObservable
+  - Debug
+  - Deferred
+  - DelaySubscription
+  - DistinctUntilChanged
+  - Do
+  - ElementAt
+  - Empty
+  - Error
+  - Filter
+  - Generate
+  - Just
+  - Map
+  - Merge
+  - Multicast
+  - Never
+  - ObserveOn
+  - ObserveOnSerialDispatchQueue
+  - Producer
+  - Range
+  - Reduce
+  - RefCount
+  - Repeat
+  - RetryWhen
+  - Sample
+  - Scan
+  - Sequence
+  - ShareReplay1
+  - ShareReplay1WhileConnected
+  - SingleAsync
+  - Sink
+  - Skip
+  - SkipUntil
+  - SkipWhile
+  - StartWith
+  - SubscribeOn
+  - Switch
+  - Take
+  - TakeLast
+  - TakeUntil
+  - TakeWhile
+  - Throttle
+  - Timeout
+  - Timer
+  - ToArray
+  - Using
+  - Window
+  - WithLatestFrom
+  - Zip+arity
+  - Zip+CollectionType
+  - Zip
+- name: RxSwift/Observables
+  children:
+  - Observable+Aggregate
+  - Observable+Binding
+  - Observable+Concurrency
+  - Observable+Creation
+  - Observable+Debug
+  - Observable+Multiple
+  - Observable+Single
+  - Observable+StandardSequenceOperators
+  - Observable+Time
+- name: RxSwift/Observers
+  children:
+  - AnonymousObserver
+  - ObserverBase
+  - TailRecursiveSink
+- name: RxSwift/Platform
+  children:
+  - Platform.Darwin
+  - Platform.Linux
+- name: RxSwift/Schedulers
+  children:
+  - ConcurrentDispatchQueueScheduler
+  - ConcurrentMainScheduler
+  - CurrentThreadScheduler
+  - DispatchQueueSchedulerQOS
+  - HistoricalScheduler
+  - HistoricalSchedulerTimeConverter
+  - ImmediateScheduler
+  - MainScheduler
+  - OperationQueueScheduler
+  - RecursiveScheduler
+  - SchedulerServices+Emulation
+  - SerialDispatchQueueScheduler
+  - VirtualTimeConverterType
+  - VirtualTimeScheduler
+- name: RxSwift/Schedulers/Internal
+  children:
+  - AnonymousInvocable
+  - InvocableScheduledItem
+  - InvocableType
+  - ScheduledItem
+  - ScheduledItemType
+- name: RxSwift/Subjects
+  children:
+  - BehaviorSubject
+  - PublishSubject
+  - ReplaySubject
+  - SubjectType
+  - Variable
+- name: RxCocoa/Common
+  children:
+  - CLLocationManager+Rx
+  - DelegateProxy
+  - DelegateProxyType
+  - KVORepresentable+CoreGraphics
+  - KVORepresentable+Swift
+  - KVORepresentable
+  - Logging
+  - NSLayoutConstraint+Rx
+  - Observable+Bind
+  - Reactive
+  - RxCocoa
+  - RxTarget
+  - RxTextInput
+  - SectionedViewDataSourceType
+- name: RxCocoa/Common/CocoaUnits
+  children:
+  - ControlEvent
+  - ControlProperty
+  - UIBindingObserver
+- name: RxCocoa/Common/CocoaUnits/Driver
+  children:
+  - ControlEvent+Driver
+  - ControlProperty+Driver
+  - Driver+Operators+arity
+  - Driver+Operators
+  - Driver+Subscription
+  - Driver
+  - ObservableConvertibleType+Driver
+  - Variable+Driver
+- name: RxCocoa/Common/Observables/Implementations
+  children:
+  - ControlTarget
+  - DeallocObservable
+  - KVOObservable
+  - KVOObserver
+  - MessageSentObserver
+- name: RxCocoa/Common/Observables
+  children:
+  - NSNotificationCenter+Rx
+  - NSObject+Rx+KVORepresentable
+  - NSObject+Rx+RawRepresentable
+  - NSObject+Rx
+  - NSURLSession+Rx
+- name: RxCocoa/Common/Proxies
+  children:
+  - RxCLLocationManagerDelegateProxy
+- name: RxCocoa/iOS/DataSources
+  children:
+  - RxCollectionViewReactiveArrayDataSource
+  - RxTableViewReactiveArrayDataSource
+- name: RxCocoa/iOS/Events
+  children:
+  - ItemEvents
+- name: RxCocoa/iOS
+  children:
+  - NSTextStorage+Rx
+  - UIActivityIndicatorView+Rx
+  - UIAlertAction+Rx
+  - UIApplication+Rx
+  - UIBarButtonItem+Rx
+  - UIButton+Rx
+  - UICollectionView+Rx
+  - UIControl+Rx
+  - UIDatePicker+Rx
+  - UIGestureRecognizer+Rx
+  - UIImagePickerController+Rx
+  - UIImageView+Rx
+  - UILabel+Rx
+  - UINavigationItem+Rx
+  - UIPageControl+Rx
+  - UIPickerView+Rx
+  - UIProgressView+Rx
+  - UIRefreshControl+Rx
+  - UIScrollView+Rx
+  - UISearchBar+Rx
+  - UISearchController+Rx
+  - UISegmentedControl+Rx
+  - UISlider+Rx
+  - UIStepper+Rx
+  - UISwitch+Rx
+  - UITabBarItem+Rx
+  - UITableView+Rx
+  - UITextField+Rx
+  - UITextView+Rx
+  - UIView+Rx
+  - UIViewController+Rx
+- name: RxCocoa/iOS/Protocols
+  children:
+  - RxCollectionViewDataSourceType
+  - RxTableViewDataSourceType
+- name: RxCocoa/iOS/Proxies
+  children:
+  - RxCollectionViewDataSourceProxy
+  - RxCollectionViewDelegateProxy
+  - RxImagePickerDelegateProxy
+  - RxPickerViewDelegateProxy
+  - RxScrollViewDelegateProxy
+  - RxSearchBarDelegateProxy
+  - RxSearchControllerDelegateProxy
+  - RxTableViewDataSourceProxy
+  - RxTableViewDelegateProxy
+  - RxTextStorageDelegateProxy
+  - RxTextViewDelegateProxy
+- name: RxCocoa/OSX
+  children:
+  - NSButton+Rx
+  - NSControl+Rx
+  - NSImageView+Rx
+  - NSSlider+Rx
+  - NSTextField+Rx
+  - NSView+Rx

.travis.yml

@@ -1,9 +1,13 @@
 language: objective-c
 
-osx_image: xcode7.3
+osx_image: xcode8
 
 notifications:
   slack: rxswift:3ykt2Z61f8GkdvhCZTYPduOL
   email: false
 
-script: ./scripts/pre-release-tests.sh
+script: 
+  - "bundle exec danger --verbose"
+  - xcodebuild -version
+  - xcodebuild -showsdks
+  - ./scripts/all-tests.sh

CHANGELOG.md

@@ -3,6 +3,109 @@ All notable changes to this project will be documented in this file.
 
 ---
 
+## Master
+
+## [3.0.0.alpha.1](https://github.com/ReactiveX/RxSwift/releases/tag/3.0.0.alpha.1) (Xcode 8 beta 6 compatible 8S201h)
+
+#### Features
+
+* Modernizes API to be more consistent with Swift 3.0 API Design Guidelines
+* Replaces `rx_*` prefix with `rx.*` extensions. (Inspired by `.lazy` collections API). We've tried annotate deprecated APIs with `@available(*, deprecated, renamed: "new method")` but trivial replacements aren't annotated.
+	* `rx_text` -> `rx.text`
+	* `rx_tap` -> `rx.tap`
+	* `rx_date` -> `rx.date`
+	* ...
+* Deprecates `subscribeNext`, `subscribeError`, `subscribeCompleted` in favor of `subscribe(onNext:onError:onCompleted:onDisposed)` (The downsides of old extensions were inconsistencies with Swift API guidelines. They also weren't expressing that calling them actually performes additional subscriptions and thus potentially additional work beside just registering observers).
+* Deprecates `doOnNext`, `doOnCompleted`, `doOnError` in favor of `do(onNext:onCompleted:onError:onSubscribe:onDisposed:)`
+* Adds `onSubscribe` and `onDisposed` to `do` operator.
+* Adds namespace for immutable disposables called `Disposables`
+	* Deprecates `AnonymousDisposable` in favor of `Disposables.create(with:)`
+	* Deprecates `NopDisposable` in favor of `Disposables.create()`
+	* Deprecates `BinaryDisposable` in favor of `Disposables.create(_:_:)`
+* Deprecates `toObservable` in favor of `Observable.from()`.
+* Replaces old javascript automation tests with Swift UI Tests.
+* ...
+
+#### Anomalies
+
+* There is a problem using `UISwitch` extensions because it seems that a bug exists in UIKit that causes all `UISwitch` instances to leak. https://github.com/ReactiveX/RxSwift/issues/842
+
+## [2.6.0](https://github.com/ReactiveX/RxSwift/releases/tag/2.6.0)
+
+#### Features
+
+* Adds Swift 2.3 compatibility.
+* Adds `UIViewController.rx_title` extension.
+* Adds `UIScrollView.rx_scrollEnabled` extension.
+* Resolve static analysis issues relating to non-use of an assigned value, and potential null dereferences in RxCocoa's Objective-C classes.
+* Changes `forwardDelegate` property type on `DelegateProxy` from `assign` to `weak`.
+* Simplifies UITable/CollectionView data source generic parameters.
+* Adds simple usage examples to UITable/CollectionView data source extensions.
+* Documents UITable/CollectionView data source extensions memory management and adds unit tests to cover that documentation.
+* Adds `.jazzy.yml`
+* Adds `UITabBar` extensions and delegate proxy wrapper
+    * rx_didSelectItem
+    * rx_willBeginCustomizing
+    * rx_didBeginCustomizing
+    * rx_willEndCustomizing
+    * rx_didEndCustomizing
+* Adds `UIPickerView` delegate proxy and extensions:
+    * rx_itemSelected
+* Adds `UIAlertAction.rx_enabled` extension.
+* Adds `UIButton.rx_title(controlState: UIControlState = .Normal)` extension.
+* Adds `UIPageControl.rx_currentPage` extension.
+* Adds `hasObservers` property to `*Subject`.
+
+#### Anomalies
+
+* Fixes problem with UITable/CollectionView releasing of data sources when result subscription disposable wasn't retained.
+* Fixes all Xcode analyzer warnings
+
+
+## [2.5.0](https://github.com/ReactiveX/RxSwift/releases/tag/2.5.0)
+
+#### Features
+
+* Exposes `installForwardDelegate`.
+* Adds `proxyForObject` as protocol extension and deprecates global function version.
+* Improves `installForwardDelegate` assert messaging.
+* Improves gesture recognizer extensions to use typed gesture recognizers in `rx_event`.
+* Adds `RxTextInput` protocol to enable creating reactive extensions for `UITextInput/NSTextInput`.
+* Adds `rx_willDisplayCell` and `rx_didEndDisplayingCell` extensions to `UITableView`.
+* Improves playgrounds.
+
+
+#### Anomalies
+
+* Fixes in documentation.
+* Turns off Bitcode for `RxTests` CocoaPods integration.
+* Fixes `UITextField.rx_text` and `UITextView.rx_text` integrations to be more robust when used with two way binding.
+* Fixes two way binding example code so it now properly handles IME used in Asian cultures and adds explanations how to properly perform two way bindings. https://github.com/ReactiveX/RxSwift/issues/649
+* Removes `distinctUntilChanged` from control extensions. https://github.com/ReactiveX/RxSwift/issues/626
+
+
+## [2.4.0](https://github.com/ReactiveX/RxSwift/releases/tag/2.4)
+
+#### Features
+
+* adds `Driver.drive` with `Variable` parameter.
+* exposes `RxSearchBarDelegateProxy`
+* adds `rx_cancelButtonClicked` to `UISearchBar`.
+* adds `rx_searchButtonClicked` to `UISearchBar`.
+* adds `UISearchController` extensions:
+  * `rx_didDismiss`
+  * `rx_didPresent`
+  * `rx_present`
+  * `rx_willDismiss`
+  * `rx_willPresent`
+
+
+#### Anomalies
+
+* Fixes anomaly with `multicast` disposing subscription.
+* Small grammar fixes in code.
+* Fixes in documentation.
+
 ## [2.3.1](https://github.com/ReactiveX/RxSwift/releases/tag/2.3.1)
 
 #### Features
@@ -40,12 +143,12 @@ All notable changes to this project will be documented in this file.
 This is example of those changes:
 
 ```swift
-- public func rx_itemsWithCellFactory<S : SequenceType, O : ObservableType where O.E == S>
+- public func rx_itemsWithCellFactory<S : Sequence, O : ObservableType where O.E == S>
       (source: O)
-      (cellFactory: (UITableView, Int, S.Generator.Element) -> UITableViewCell) -> Disposable
-+ public func rx_itemsWithCellFactory<S : SequenceType, O : ObservableType where O.E == S>
+      (cellFactory: (UITableView, Int, S.Iterator.Element) -> UITableViewCell) -> Disposable
++ public func rx_itemsWithCellFactory<S : Sequence, O : ObservableType where O.E == S>
       (source: O)
-      -> (cellFactory: (UITableView, Int, S.Generator.Element) -> UITableViewCell) -> Disposable
+      -> (cellFactory: (UITableView, Int, S.Iterator.Element) -> UITableViewCell) -> Disposable
 ```
 
 * Fixes anomaly in `CLLocationManager` extensions
@@ -317,7 +420,7 @@ let (
 * `NSURLSession` extensions now return `Observable<(NSData!, NSHTTPURLResponse)>` instead of `Observable<(NSData!, NSURLResponse!)>`.
 * Optimizes consecutive map operators. For example `map(validate1).map(validate2).map(parse)` is now internally optimized to one `map` operator.
 * Adds overloads for `just`, `sequenceOf`, `toObservable` that accept scheduler.
-* Deprecates `asObservable` extension of `SequenceType` in favor of `toObservable`.
+* Deprecates `asObservable` extension of `Sequence` in favor of `toObservable`.
 * Adds `toObservable` extension to `Array`.
 * Improves table view animated data source example.
 * Polishing of `RxDataSourceStarterKit`
@@ -429,7 +532,7 @@ let (
 * Renames `ScopedDispose` to `ScopedDisposable`
 * Deprecates `observeSingleOn` in favor of `observeOn`
 * Adds inline documentation
-* Renames `from` to `asObservable` extension method on `SequenceType`
+* Renames `from` to `asObservable` extension method on `Sequence`
 * Renames `catchErrorResumeNext` in favor of `catchErrorJustReturn`
 * Deprecates `catchErrorToResult`, the preferred way is to use Swift `do/try/catch` mechanism.
 * Deprecates `RxResult`, the preferred way is to use Swift `do/try/catch` mechanism.

CODE_OF_CONDUCT.md

@@ -0,0 +1,74 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+In the interest of fostering an open and welcoming environment, we as
+contributors and maintainers pledge to making participation in our project and
+our community a harassment-free experience for everyone, regardless of age, body
+size, disability, ethnicity, gender identity and expression, level of experience,
+nationality, personal appearance, race, religion, or sexual identity and
+orientation.
+
+## Our Standards
+
+Examples of behavior that contributes to creating a positive environment
+include:
+
+* Using welcoming and inclusive language
+* Being respectful of differing viewpoints and experiences
+* Gracefully accepting constructive criticism
+* Focusing on what is best for the community
+* Showing empathy towards other community members
+
+Examples of unacceptable behavior by participants include:
+
+* The use of sexualized language or imagery and unwelcome sexual attention or
+advances
+* Trolling, insulting/derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or electronic
+  address, without explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of acceptable
+behavior and are expected to take appropriate and fair corrective action in
+response to any instances of unacceptable behavior.
+
+Project maintainers have the right and responsibility to remove, edit, or
+reject comments, commits, code, wiki edits, issues, and other contributions
+that are not aligned to this Code of Conduct, or to ban temporarily or
+permanently any contributor for other behaviors that they deem inappropriate,
+threatening, offensive, or harmful.
+
+## Scope
+
+This Code of Conduct applies both within project spaces and in public spaces
+when an individual is representing the project or its community. Examples of
+representing a project or community include using an official project e-mail
+address, posting via an official social media account, or acting as an appointed
+representative at an online or offline event. Representation of a project may be
+further defined and clarified by project maintainers.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported by contacting one of the project maintainers https://github.com/ReactiveX/RxSwift/graphs/contributors. All
+complaints will be reviewed and investigated and will result in a response that
+is deemed necessary and appropriate to the circumstances. The project team is
+obligated to maintain confidentiality with regard to the reporter of an incident.
+Further details of specific enforcement policies may be posted separately.
+
+Project maintainers who do not follow or enforce the Code of Conduct in good
+faith may face temporary or permanent repercussions as determined by other
+members of the project's leadership.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4,
+available at [http://contributor-covenant.org/version/1/4][version]
+
+[homepage]: http://contributor-covenant.org
+[version]: http://contributor-covenant.org/version/1/4/

CONTRIBUTING.md

@@ -13,6 +13,14 @@ So what does this mean in practice:
 * Please target your PR to **develop** branch
 * If you want to make a bigger contribution to the project, please [open an issue first](https://github.com/ReactiveX/RxSwift/issues/new) so we can plan that work, discuss the architecture and brainstorm around that idea first.
 
+## Submitting a Pull Request
+
+Before submitting a pull request please make sure **`./scripts/all-tests.sh`** is passing (exits with 0), otherwise we won't be able to pull your code.
+
+To be able to run `./scripts/all-tests.sh`, you'll need to install [xcpretty](https://github.com/supermarin/xcpretty).
+
+`sudo gem install xcpretty`
+
 ## Developer's Certificate of Origin 1.1
 
 By making a contribution to this project, I certify that:

Dangerfile

@@ -0,0 +1,33 @@
+# Warn about develop branch
+current_branch = env.request_source.pr_json["base"]["ref"]
+warn("Please target PRs to `develop` branch") if current_branch != "develop" && current_branch != "swift-3.0"
+
+# Sometimes it's a README fix, or something like that - which isn't relevant for
+# including in a project's CHANGELOG for example
+declared_trivial = pr_title.include? "#trivial"
+
+# Make it more obvious that a PR is a work in progress and shouldn't be merged yet
+warn("PR is classed as Work in Progress") if pr_title.include? "[WIP]"
+
+# Warn no CHANGELOG
+warn("No CHANGELOG changes made") if lines_of_code > 50 && !modified_files.include?("CHANGELOG.yml") && !declared_trivial
+
+# Warn pod spec changes
+warn("RxCocoa.podspec changed") if modified_files.include?("RxCocoa.podspec")
+warn("RxSwift.podspec changed") if modified_files.include?("RxSwift.podspec")
+warn("RxTests.podspec changed") if modified_files.include?("RxTests.podspec")
+warn("RxBlocking.podspec changed") if modified_files.include?("RxBlocking.podspec")
+
+# Warn summary on pull request
+if pr_body.length < 5
+  warn "Please provide a summary in the Pull Request description"
+end
+
+# If these are all empty something has gone wrong, better to raise it in a comment
+if modified_files.empty? && added_files.empty? && deleted_files.empty?
+  fail "This PR has no changes at all, this is likely a developer issue."
+end
+
+# Warn when there is a big PR
+warn("Big PR") if lines_of_code > 500
+

Documentation/API.md

@@ -3,7 +3,7 @@ API
 
 ## RxSwift supported operators
 
-In some cases there are multiple aliases for the same operator, because on different platforms / implementations, the same operation is sometimes called differently. Sometimes this is because historical reasons, sometimes because of reserved language keywords.
+In some cases there are multiple aliases for the same operator, because on different platforms / implementations, the same operation is sometimes named differently. Sometimes this is because of historical reasons, while sometimes because of reserved language keywords.
 
 When lacking a strong community consensus, RxSwift will usually include multiple aliases.
 
@@ -26,6 +26,7 @@ Operators are stateless by default.
  * [`timer`](http://reactivex.io/documentation/operators/timer.html)
 
 #### Transforming Observables
+
   * [`buffer`](http://reactivex.io/documentation/operators/buffer.html)
   * [`flatMap`](http://reactivex.io/documentation/operators/flatmap.html)
   * [`flatMapFirst`](http://reactivex.io/documentation/operators/flatmap.html)
@@ -35,6 +36,7 @@ Operators are stateless by default.
   * [`window`](http://reactivex.io/documentation/operators/window.html)
 
 #### Filtering Observables
+
   * [`debounce` / `throttle`](http://reactivex.io/documentation/operators/debounce.html)
   * [`distinctUntilChanged`](http://reactivex.io/documentation/operators/distinct.html)
   * [`elementAt`](http://reactivex.io/documentation/operators/elementat.html)
@@ -71,6 +73,7 @@ Operators are stateless by default.
   * debug
 
 #### Conditional and Boolean Operators
+
   * [`amb`](http://reactivex.io/documentation/operators/amb.html)
   * [`skipWhile`](http://reactivex.io/documentation/operators/skipwhile.html)
   * [`skipUntil`](http://reactivex.io/documentation/operators/skipuntil.html)
@@ -99,13 +102,13 @@ Creating new operators is also pretty straightforward.
 
 ```swift
 
-extension NSObject {
+extension Reactive where Base: NSObject {
 
-    public var rx_deallocated: Observable<Void> {}
+    public var deallocated: Observable<Void> {}
 
 #if !DISABLE_SWIZZLING
 
-    public var rx_deallocating: Observable<Void> {}
+    public var deallocating: Observable<Void> {}
 
 #endif
 
@@ -115,9 +118,9 @@ extension NSObject {
 
 
 ```swift
-extension NSObject {
+extension Reactive where Base: NSObject {
 
-    public func rx_observe<Element>(
+    public func observe<Element>(
         type: E.Type,
         _ keyPath: String,
         options: NSKeyValueObservingOptions = .New | .Initial,
@@ -126,7 +129,7 @@ extension NSObject {
 
 #if !DISABLE_SWIZZLING
 
-    public func rx_observeWeakly<Element>(
+    public func observeWeakly<Element>(
         type: E.Type,
         _ keyPath: String,
         options: NSKeyValueObservingOptions = .New | .Initial
@@ -137,23 +140,23 @@ extension NSObject {
 ```
 
 ```swift
-extension NSURLSession {
+extension Reactive where Base: NSURLSession {
 
-    public func rx_response(request: NSURLRequest) -> Observable<(NSData, NSURLResponse)> {}
+    public func response(request: NSURLRequest) -> Observable<(NSData, NSURLResponse)> {}
 
-    public func rx_data(request: NSURLRequest) -> Observable<NSData> {}
+    public func data(request: NSURLRequest) -> Observable<NSData> {}
 
-    public func rx_JSON(request: NSURLRequest) -> Observable<AnyObject> {}
+    public func JSON(request: NSURLRequest) -> Observable<AnyObject> {}
 
-    public func rx_JSON(URL: NSURL) -> Observable<AnyObject> {}
+    public func JSON(URL: NSURL) -> Observable<AnyObject> {}
 
 }
 ```
 
 ```swift
-extension NSNotificationCenter {
+extension Reactive where Base: NSNotificationCenter {
 
-    public func rx_notification(name: String, object: AnyObject?) -> Observable<NSNotification> {}
+    public func notification(name: String, object: AnyObject?) -> Observable<NSNotification> {}
 
 }
 ```
@@ -167,39 +170,39 @@ class DelegateProxy {
 ```
 
 ```swift
-extension CLLocationManager {
+extension Reactive where Base: CLLocationManager {
 
-    public var rx_delegate: DelegateProxy {}
+    public var delegate: DelegateProxy {}
 
-    public var rx_didUpdateLocations: Observable<[CLLocation]> {}
+    public var didUpdateLocations: Observable<[CLLocation]> {}
 
-    public var rx_didFailWithError: Observable<NSError> {}
+    public var didFailWithError: Observable<NSError> {}
 
-    public var rx_didFinishDeferredUpdatesWithError: Observable<NSError> {}
+    public var didFinishDeferredUpdatesWithError: Observable<NSError> {}
 
-    public var rx_didPauseLocationUpdates: Observable<Void> {}
+    public var didPauseLocationUpdates: Observable<Void> {}
 
-    public var rx_didResumeLocationUpdates: Observable<Void> {}
+    public var didResumeLocationUpdates: Observable<Void> {}
 
-    public var rx_didUpdateHeading: Observable<CLHeading> {}
+    public var didUpdateHeading: Observable<CLHeading> {}
 
-    public var rx_didEnterRegion: Observable<CLRegion> {}
+    public var didEnterRegion: Observable<CLRegion> {}
 
-    public var rx_didExitRegion: Observable<CLRegion> {}
+    public var didExitRegion: Observable<CLRegion> {}
 
-    public var rx_didDetermineStateForRegion: Observable<(state: CLRegionState, region: CLRegion)> {}
+    public var didDetermineStateForRegion: Observable<(state: CLRegionState, region: CLRegion)> {}
 
-    public var rx_monitoringDidFailForRegionWithError: Observable<(region: CLRegion?, error: NSError)> {}
+    public var monitoringDidFailForRegionWithError: Observable<(region: CLRegion?, error: NSError)> {}
 
-    public var rx_didStartMonitoringForRegion: Observable<CLRegion> {}
+    public var didStartMonitoringForRegion: Observable<CLRegion> {}
 
-    public var rx_didRangeBeaconsInRegion: Observable<(beacons: [CLBeacon], region: CLBeaconRegion)> {}
+    public var didRangeBeaconsInRegion: Observable<(beacons: [CLBeacon], region: CLBeaconRegion)> {}
 
-    public var rx_rangingBeaconsDidFailForRegionWithError: Observable<(region: CLBeaconRegion, error: NSError)> {}
+    public var rangingBeaconsDidFailForRegionWithError: Observable<(region: CLBeaconRegion, error: NSError)> {}
 
-    public var rx_didVisit: Observable<CLVisit> {}
+    public var didVisit: Observable<CLVisit> {}
 
-    public var rx_didChangeAuthorizationStatus: Observable<CLAuthorizationStatus> {}
+    public var didChangeAuthorizationStatus: Observable<CLAuthorizationStatus> {}
 
 }
 ```
@@ -208,258 +211,281 @@ extension CLLocationManager {
 
 ```swift
 
-extension UIControl {
+extension Reactive where Base: UIControl {
 
-    public func rx_controlEvent(controlEvents: UIControlEvents) -> ControlEvent<Void> {}
+    public func controlEvent(controlEvents: UIControlEvents) -> ControlEvent<Void> {}
 
-    public var rx_enabled: ObserverOf<Bool> {}
+    public var enabled: ObserverOf<Bool> {}
 }
 
 ```
 
 ```swift
-extension UIButton {
+extension Reactive where Base: UIButton {
 
-    public var rx_tap: ControlEvent<Void> {}
+    public var tap: ControlEvent<Void> {}
 
 }
 ```
 
 ```swift
-extension UITextField {
+extension Reactive where Base: UITextField {
 
-    public var rx_text: ControlProperty<String> {}
+    public var text: ControlProperty<String> {}
 
 }
 ```
 
 ```swift
-extension UITextView {
+extension Reactive where Base: UITextView {
 
-    override func rx_createDelegateProxy() -> RxScrollViewDelegateProxy {}
+    override func createDelegateProxy() -> RxScrollViewDelegateProxy {}
 
-    public var rx_text: ControlProperty<String> {}
+    public var text: ControlProperty<String> {}
 
 }
 ```
 
 ```swift
-extension UISearchBar {
+extension Reactive where Base: UISearchBar {
 
-    public var rx_delegate: DelegateProxy {}
+    public var delegate: DelegateProxy {}
 
-    public var rx_searchText: ControlProperty<String> {}
+    public var searchText: ControlProperty<String> {}
 
 }
 ```
 
 ```swift
-extension UILabel {
+extension Reactive where Base: UILabel {
 
-    public var rx_text: ObserverOf<String> {}
+    public var text: ObserverOf<String> {}
 
 }
 ```
 
 ```swift
-extension UIDatePicker {
+extension Reactive where Base: UIDatePicker {
 
-    public var rx_date: ControlProperty<NSDate> {}
+    public var date: ControlProperty<NSDate> {}
 
 }
 ```
 
 ```swift
-extension UIImageView {
+extension Reactive where Base: UIImageView {
 
-    public var rx_image: ObserverOf<UIImage!> {}
+    public var image: ObserverOf<UIImage!> {}
 
-    public func rx_imageAnimated(transitionType: String?) -> AnyObserver<UIImage?>
+    public func imageAnimated(transitionType: String?) -> AnyObserver<UIImage?>
 
 }
 ```
 
 ```swift
-extension UIScrollView {
+extension Reactive where Base: UIScrollView {
 
-    public var rx_delegate: DelegateProxy {}
+    public var delegate: DelegateProxy {}
 
-    public func rx_setDelegate(delegate: UIScrollViewDelegate) {}
+    public func setDelegate(delegate: UIScrollViewDelegate) {}
 
-    public var rx_contentOffset: ControlProperty<CGPoint> {}
+    public var contentOffset: ControlProperty<CGPoint> {}
 
 }
 ```
 
 ```swift
-extension UIBarButtonItem {
+extension Reactive where Base: UIBarButtonItem {
 
-    public var rx_tap: ControlEvent<Void> {}
+    public var tap: ControlEvent<Void> {}
 
 }
 ```
 
 ```swift
-extension UISlider {
+extension Reactive where Base: UISlider {
 
-    public var rx_value: ControlProperty<Float> {}
+    public var value: ControlProperty<Float> {}
 
 }
 ```
 
 ```swift
-extension UITableView {
+extension Reactive where Base: UITableView {
 
-    public var rx_dataSource: DelegateProxy {}
+    public var dataSource: DelegateProxy {}
 
-    public func rx_setDataSource(dataSource: UITableViewDataSource) -> Disposable {}
+    public func setDataSource(dataSource: UITableViewDataSource) -> Disposable {}
 
-    public func rx_itemsWithCellFactory(source: O)(cellFactory: (UITableView, Int, S.Generator.Element) -> UITableViewCell) -> Disposable {}
+    public func itemsWithCellFactory(source: O)(cellFactory: (UITableView, Int, S.Iterator.Element) -> UITableViewCell) -> Disposable {}
 
-    public func rx_itemsWithCellIdentifier(cellIdentifier: String, cellType: Cell.Type = Cell.self)(source: O)(configureCell: (Int, S.Generator.Element, Cell) -> Void) -> Disposable {}
+    public func itemsWithCellIdentifier(cellIdentifier: String, cellType: Cell.Type = Cell.self)(source: O)(configureCell: (Int, S.Iterator.Element, Cell) -> Void) -> Disposable {}
 
-    public func rx_itemsWithDataSource(dataSource: DataSource)(source: O) -> Disposable {}
+    public func itemsWithDataSource(dataSource: DataSource)(source: O) -> Disposable {}
 
-    public var rx_itemSelected: ControlEvent<NSIndexPath> {}
+    public var itemSelected: ControlEvent<IndexPath> {}
 
-    public var rx_itemDeselected: ControlEvent<NSIndexPath> {}
+    public var itemDeselected: ControlEvent<IndexPath> {}
 
-    public var rx_itemInserted: ControlEvent<NSIndexPath> {}
+    public var itemInserted: ControlEvent<IndexPath> {}
 
-    public var rx_itemDeleted: ControlEvent<NSIndexPath> {}
+    public var itemDeleted: ControlEvent<IndexPath> {}
 
-    public var rx_itemMoved: ControlEvent<ItemMovedEvent> {}
+    public var itemMoved: ControlEvent<ItemMovedEvent> {}
 
-    // This method only works in case one of the `rx_itemsWith*` methods was used, or data source implements `SectionedViewDataSourceType`
-    public func rx_modelSelected<T>(modelType: T.Type) -> ControlEvent<T> {}
+    // This method only works in case one of the `rx.itemsWith*` methods was used, or data source implements `SectionedViewDataSourceType`
+    public func modelSelected<T>(modelType: T.Type) -> ControlEvent<T> {}
 
-    // This method only works in case one of the `rx_itemsWith*` methods was used, or data source implements `SectionedViewDataSourceType`
-    public func rx_modelDeselected<T>(modelType: T.Type) -> ControlEvent<T> {}
+    // This method only works in case one of the `rx.itemsWith*` methods was used, or data source implements `SectionedViewDataSourceType`
+    public func modelDeselected<T>(modelType: T.Type) -> ControlEvent<T> {}
 
 }
 ```
 
 ```swift
-extension UICollectionView {
+extension Reactive where Base: UICollectionView {
 
-    public var rx_dataSource: DelegateProxy {}
+    public var dataSource: DelegateProxy {}
 
-    public func rx_setDataSource(dataSource: UICollectionViewDataSource) -> Disposable {}
+    public func setDataSource(dataSource: UICollectionViewDataSource) -> Disposable {}
 
-    public func rx_itemsWithCellFactory(source: O)(cellFactory: (UICollectionView, Int, S.Generator.Element) -> UICollectionViewCell) -> Disposable {}
+    public func itemsWithCellFactory(source: O)(cellFactory: (UICollectionView, Int, S.Iterator.Element) -> UICollectionViewCell) -> Disposable {}
 
-    public func rx_itemsWithCellIdentifier(cellIdentifier: String, cellType: Cell.Type = Cell.self)(source: O)(configureCell: (Int, S.Generator.Element, Cell) -> Void) -> Disposable {}
+    public func itemsWithCellIdentifier(cellIdentifier: String, cellType: Cell.Type = Cell.self)(source: O)(configureCell: (Int, S.Iterator.Element, Cell) -> Void) -> Disposable {}
 
-    public func rx_itemsWithDataSource(dataSource: DataSource)(source: O) -> Disposable {}
+    public func itemsWithDataSource(dataSource: DataSource)(source: O) -> Disposable {}
 
-    public var rx_itemSelected: ControlEvent<NSIndexPath> {}
+    public var itemSelected: ControlEvent<IndexPath> {}
 
-    public var rx_itemDeselected: ControlEvent<NSIndexPath> {}
+    public var itemDeselected: ControlEvent<IndexPath> {}
 
-    // This method only works in case one of the `rx_itemsWith*` methods was used, or data source implements `SectionedViewDataSourceType`
-    public func rx_modelSelected<T>(modelType: T.Type) -> ControlEvent<T> {}
+    // This method only works in case one of the `rx.itemsWith*` methods was used, or data source implements `SectionedViewDataSourceType`
+    public func modelSelected<T>(modelType: T.Type) -> ControlEvent<T> {}
 
-    // This method only works in case one of the `rx_itemsWith*` methods was used, or data source implements `SectionedViewDataSourceType`
-    public func rx_modelSelected<T>(modelType: T.Type) -> ControlEvent<T> {}
+    // This method only works in case one of the `rx.itemsWith*` methods was used, or data source implements `SectionedViewDataSourceType`
+    public func modelSelected<T>(modelType: T.Type) -> ControlEvent<T> {}
 }
 ```
 
 ```swift
-extension UIGestureRecognizer {
+extension Reactive where Base: UIGestureRecognizer {
 
-    public var rx_event: ControlEvent<UIGestureRecognizer> {}
+    public var event: ControlEvent<UIGestureRecognizer> {}
 
 }
 ```
 
 ```swift
-extension UIImagePickerController {
+extension Reactive where Base: UIImagePickerController {
 
-    public var rx_didFinishPickingMediaWithInfo: Observable<[String : AnyObject]> {}
+    public var didFinishPickingMediaWithInfo: Observable<[String : AnyObject]> {}
 
-    public var rx_didCancel: Observable<()> {}
+    public var didCancel: Observable<()> {}
 
 }
 ```
 
 ```swift
-extension UISegmentedControl {
+extension Reactive where Base: UISegmentedControl {
 
-    public var rx_value: ControlProperty<Int> {}
+    public var value: ControlProperty<Int> {}
 
 }
 ```
 
 ```swift
-extension UISwitch {
+extension Reactive where Base: UISwitch {
 
-    public var rx_value: ControlProperty<Bool> {}
+    public var value: ControlProperty<Bool> {}
 
 }
 ```
 
 ```swift
-extension UIActivityIndicatorView {
+extension Reactive where Base: UIActivityIndicatorView {
 
-    public var rx_animating: AnyObserver<Bool> {}
+    public var animating: AnyObserver<Bool> {}
 
 }
 ```
 
+```swift
+extension Reactive where Base: UINavigationItem {
+
+    public var title: AnyObserver<String?> {}
+}
+```
+
 **OSX**
 
 ```swift
-extension NSControl {
+extension Reactive where Base: NSControl {
 
-    public var rx_controlEvent: ControlEvent<()> {}
+    public var controlEvent: ControlEvent<()> {}
 
-    public var rx_enabled: AnyObserver<Bool> {}
+    public var enabled: AnyObserver<Bool> {}
 
 }
 ```
 
 ```swift
 
-extension NSSlider {
+extension Reactive where Base: NSSlider {
 
-    public var rx_value: ControlProperty<Double> {}
+    public var value: ControlProperty<Double> {}
 
 }
 ```
 
 ```swift
-extension NSButton {
+extension Reactive where Base: NSButton {
 
-    public var rx_tap: ControlEvent<Void> {}
+    public var tap: ControlEvent<Void> {}
 
-    public var rx_state: ControlProperty<Int> {}
+    public var state: ControlProperty<Int> {}
 
 }
 ```
 
 ```swift
-extension NSImageView {
+extension Reactive where Base: NSImageView {
 
-    public var rx_image: ObserverOf<NSImage?> {}
+    public var image: ObserverOf<NSImage?> {}
 
-    public func rx_imageAnimated(transitionType: String?) -> AnyObserver<NSImage?>
+    public func imageAnimated(transitionType: String?) -> AnyObserver<NSImage?>
 }
 ```
 
 ```swift
-extension NSTextField {
+extension Reactive where Base: NSTextField {
 
-    public var rx_delegate: DelegateProxy {}
+    public var delegate: DelegateProxy {}
 
-    public var rx_text: ControlProperty<String> {}
+    public var text: ControlProperty<String> {}
 
 }
 ```
 
 ```swift
-extension UITabBarItem {
+extension Reactive where Base: UITabBarItem {
 
-    public var rx_badgeValue: AnyObserver<String?> {}
+    public var badgeValue: AnyObserver<String?> {}
+
+}
+```
+
+```swift
+extension Reactive where Base: UITabBar {
+
+    public var didSelectItem: ControlEvent<UITabBarItem> {}
+
+    public var willBeginCustomizing: ControlEvent<[UITabBarItem]> {}
+
+    public var didBeginCustomizing: ControlEvent<[UITabBarItem]> {}
+
+    public var willEndCustomizing: ControlEvent<(items: [UITabBarItem], changed: Bool)> {}
+
+    public var didEndCustomizing: ControlEvent<(items: [UITabBarItem], changed: Bool)> {}
 
 }
 ```

Documentation/ComparisonWithOtherLibraries.md

@@ -2,18 +2,18 @@
 
 RxSwift is somewhat similar to ReactiveCocoa since ReactiveCocoa borrows a large number of concepts from Rx.
 
-One of the main goals of this project was to create a significantly simpler interface that is more aligned with other Rx implementations, offers richer concurrency model, offers more optimization opportunities and is more aligned with built-in Swift error handling mechanisms.
+One of the main goals of this project was to create a significantly simpler interface that is more aligned with other Rx implementations, offers a richer concurrency model, offers more optimization opportunities and is more aligned with built-in Swift error handling mechanisms.
 
-We've also decided to only rely on Swift/llvm compiler and not introduce any external dependencies.
+We've also decided to only rely on the Swift/llvm compiler and not introduce any external dependencies.
 
-Probably the main difference between these projects is the difference of approach in building abstractions.
+Probably the main difference between these projects is in their approach in building abstractions.
 
 The main goal of RxSwift project is to provide environment agnostic compositional computation glue abstracted in the form of observable sequences.
-We then aim to improve the experience of using RxSwift on specific platforms. To do this RxCocoa  uses those generic computations to build more practical abstractions and wrap Foundation/Cocoa/UKit frameworks. That means that other libraries give context and semantics to the generic computation engine RxSwift provides such as `Driver`, `ControlProperty`, `ControlEvent`s and more.
+We then aim to improve the experience of using RxSwift on specific platforms. To do this, RxCocoa uses generic computations to build more practical abstractions and wrap Foundation/Cocoa/UKit frameworks. That means that other libraries give context and semantics to the generic computation engine RxSwift provides such as `Driver`, `ControlProperty`, `ControlEvent`s and more.
 
-One of the benefits to representing all these abstractions as a single concept; ​_observable sequences_​, is that all computation abstractions built on top of them are also composable in the same fundamental way. They all follow the same contract and implement the same interface.
+One of the benefits to representing all of these abstractions as a single concept - ​_observable sequences_​ - is that all computation abstractions built on top of them are also composable in the same fundamental way. They all follow the same contract and implement the same interface.
  It is also easy to create flexible subscription (resource) sharing strategies or use one of the built-in ones: `share`, `shareReplay`, `publish`, `multicast`, `shareReplayLatestWhileConnected`...
 
-This library also offers fine-tunable concurrency model. In case concurrent schedulers are used, observable sequence operators will preserve sequence properties. The same observable sequence operators will also know how to detect and optimally use known serial schedulers. ReactiveCocoa has a more limited concurrency model and only allows serial schedulers.
+This library also offers a fine-tunable concurrency model. If concurrent schedulers are used, observable sequence operators will preserve sequence properties. The same observable sequence operators will also know how to detect and optimally use known serial schedulers. ReactiveCocoa has a more limited concurrency model and only allows serial schedulers.
 
-Multithreaded programming is really hard and detecting non trivial loops is even harder. That's why all operators are built in a fault tolerant way. Even in case element generation occurs during element processing (recursion), operators will try to handle that situation and prevent deadlocks. That means that in worst possible case programming error will cause stack overflow, but users won't have to manually kill the app, and you will get crash report in error reporting systems so you can find and fix the problem.
+Multithreaded programming is really hard and detecting non trivial loops is even harder. That's why all operators are built in a fault tolerant way. Even if element generation occurs during element processing (recursion), operators will try to handle that situation and prevent deadlocks. This means that in the worst possible case programming error will cause stack overflow, but users won't have to manually kill the app, and you will get a crash report in error reporting systems so you can find and fix the problem.

Documentation/DesignRationale.md

@@ -11,29 +11,29 @@ enum Event<Element>  {
 }
 ```
 
-Let's discuss pros and cons of `ErrorType` being generic.
+Let's discuss the pros and cons of `ErrorType` being generic.
 
-If you have generic error type you create additional impedance mismatch between two observables.
+If you have a generic error type, you create additional impedance mismatch between two observables.
 
 Let's say you have:
 
 `Observable<String, E1>` and `Observable<String, E2>`
 
-There isn't much you can do with them without figuring out what will be the resulting error type.
+There isn't much you can do with them without figuring out what the resulting error type will be.
 
-Will it be `E1`, `E2` or some new `E3` maybe? So you need a new set of operators just to solve that impedance mismatch.
+Will it be `E1`, `E2` or some new `E3` maybe? So, you would need a new set of operators just to solve that impedance mismatch.
 
-This for sure hurts composition properties, and Rx really doesn't care about why sequence fails, it just usually forwards failure further down the observable chain.
+This hurts composition properties, and Rx isn't concerned with why a sequence fails, it just usually forwards failures further down the observable chain.
 
-There is additional problem that maybe in some cases operators will fail for some internal error, and in that case you won't be able to construct resulting error and report failure.
+There is an additional problem that, in some cases, operators might fail due to some internal error, in which case you wouldn't be able to construct a resulting error and report failure.
 
-But ok, let's ignore that and assume we can use that to model sequences that don't error out. It looks like it could be useful for that purpose?
+But OK, let's ignore that and assume we can use that to model sequences that don't error out. Could it be useful for that purpose?
 
-Well yes, it potentially could be, but lets consider why would you want to use sequences that don't error out.
+Well yes, it potentially could be, but let's consider why you would want to use sequences that don't error out.
 
-One obvious application would be for permanent streams in UI layer that drive entire UI. But when you consider that case, it's not really only sufficient to use compiler to prove that sequences don't error out, you also need to prove other properties. Like that elements are observed on `MainScheduler`.
+One obvious application would be for permanent streams in the UI layer that drive the entire UI. When you consider that case, it's not really sufficient to only use the compiler to prove that sequences don't error out, you also need to prove other properties. For instance, that elements are observed on `MainScheduler`.
 
-What you really need is a generic way to prove traits for sequences (`Observables`). And you could be interested in a lot of properties. For example:
+What you really need is a generic way to prove traits for observable sequences. There are a lot of properties you could be interested in. For example:
 
 * sequence terminates in finite time (server side)
 * sequence contains only one element (if you are running some computation)
@@ -41,19 +41,19 @@ What you really need is a generic way to prove traits for sequences (`Observable
 * sequence doesn't error out, never terminates and elements are delivered on main scheduler, and has refcounted sharing (UI)
 * sequence doesn't error out, never terminates and elements are delivered on specific background scheduler (audio engine)
 
-What you really want is a general compiler enforced system of traits for observable sequences, and a set of invariant operators for those wanted properties.
+What you really want is a general compiler-enforced system of traits for observable sequences, and a set of invariant operators for those wanted properties.
 
-A good analogy IMHO would be
+A good analogy would be:
 
 ```
 1, 3.14, e, 2.79, 1 + 1i      <->    Observable<E>
 1m/s, 1T, 5kg, 1.3 pounds     <->    Errorless observable, UI observable, Finite observable ...
 ```
 
-There are many ways how to do that in Swift by either using composition or inheritance of observables.
+There are many ways to do such a thing in Swift by either using composition or inheritance of observables.
 
-Additional benefit of using unit system is that you can prove that UI code is executing on same scheduler and thus use lockless operators for all transformations.
+An additional benefit of using a unit system is that you can prove that UI code is executing on the same scheduler and thus use lockless operators for all transformations.
 
-Since Rx already doesn't have locks for single sequence operations, and all of the remaining locks are in statefull components (aka UI), that would practically remove all of the remaining locks out of Rx code and create compiler enforced lockless Rx code.
+Since RxSwift already doesn't have locks for single sequence operations, and all of the locks that do exist are in stateful components (e.g. UI), there are practically no locks in RxSwift code, which allows for such details to be compiler enforced.
 
-So IMHO, there really is no benefit of using typed Errors that couldn't be achieved cleaner in other ways while preserving Rx compositional semantics. And other ways also have huge other benefits.
+There really is no benefit to using typed Errors that couldn't be achieved in other cleaner ways while preserving Rx compositional semantics.

Documentation/Examples.md

@@ -9,92 +9,82 @@ Examples
 
 ## Calculated variable
 
-Let's first start with some imperative swift code.Sw
-The purpose of example is to bind identifier `c` to a value calculated from `a` and `b` if some condition is satisfied.
+First, let's start with some imperative code.
+The purpose of this example is to bind the identifier `c` to a value calculated from `a` and `b` if some condition is satisfied.
 
-Here is the imperative swift code that calculates the value of `c`:
+Here is the imperative code that calculates the value of `c`:
 
 ```swift
-// this is usual imperative code
+// this is standard imperative code
 var c: String
-var a = 1       // this will only assign value `1` to `a` once
-var b = 2       // this will only assign value `2` to `b` once
+var a = 1       // this will only assign the value `1` to `a` once
+var b = 2       // this will only assign the value `2` to `b` once
 
 if a + b >= 0 {
-    c = "\(a + b) is positive" // this will only assign value to `c` once
+    c = "\(a + b) is positive" // this will only assign the value to `c` once
 }
 ```
 
-The value of `c` is now `3 is positive`. But if we change the value of `a` to `4`, `c` will still contain the old value.
+The value of `c` is now `3 is positive`. However, if we change the value of `a` to `4`, `c` will still contain the old value.
 
 ```swift
-a = 4           // c will still be equal "3 is positive" which is not good
-                // c should be equal to "6 is positive" because 4 + 2 = 6
+a = 4           // `c` will still be equal to "3 is positive" which is not good
+                // we want `c` to be equal to "6 is positive" since 4 + 2 = 6
 ```
 
-This is not the wanted behavior.
+This is not the desired behavior.
 
-To integrate RxSwift framework into your project just include framework in your project and write `import RxSwift`.
-
-This is the same logic using RxSwift.
+This is the improved logic using RxSwift:
 
 ```swift
 let a /*: Observable<Int>*/ = Variable(1)   // a = 1
 let b /*: Observable<Int>*/ = Variable(2)   // b = 2
 
-// This will "bind" rx variable `c` to definition
-// if a + b >= 0 {
-//      c = "\(a + b) is positive"
-// }
-
 // combines latest values of variables `a` and `b` using `+`
 let c = Observable.combineLatest(a.asObservable(), b.asObservable()) { $0 + $1 }
-	.filter { $0 >= 0 }               // if `a + b >= 0` is true, `a + b` is passed to map operator
+	.filter { $0 >= 0 }               // if `a + b >= 0` is true, `a + b` is passed to the map operator
 	.map { "\($0) is positive" }      // maps `a + b` to "\(a + b) is positive"
 
-// Since initial values are a = 1, b = 2
-// 1 + 2 = 3 which is >= 0, `c` is intially equal to "3 is positive"
+// Since the initial values are a = 1 and b = 2
+// 1 + 2 = 3 which is >= 0, so `c` is initially equal to "3 is positive"
 
-// To pull values out of rx variable `c`, subscribe to values from  `c`.
-// `subscribeNext` means subscribe to next (fresh) values of variable `c`.
-// That also includes the inital value "3 is positive".
-c.subscribeNext { print($0) }          // prints: "3 is positive"
+// To pull values out of the Rx `Observable` `c`, subscribe to values from `c`.
+// `subscribe(onNext:)` means subscribe to the next (fresh) values of `c`.
+// That also includes the initial value "3 is positive".
+c.subscribe(onNext: { print($0) })          // prints: "3 is positive"
 
-// Now let's increase the value of `a`
-// a = 4 is in RxSwift
+// Now, let's increase the value of `a`
 a.value = 4                                   // prints: 6 is positive
-// Sum of latest values is now `4 + 2`, `6` is >= 0, map operator
-// produces "6 is positive" and that result is "assigned" to `c`.
+// The sum of the latest values, `4` and `2`, is now `6`.
+// Since this is `>= 0`, the `map` operator produces "6 is positive"
+// and that result is "assigned" to `c`.
 // Since the value of `c` changed, `{ print($0) }` will get called,
-// and "6 is positive" is printed.
+// and "6 is positive" will be printed.
 
-// Now let's change the value of `b`
-// b = -8 is in RxSwift
+// Now, let's change the value of `b`
 b.value = -8                                 // doesn't print anything
-// Sum of latest values is `4 + (-8)`, `-4` is not >= 0, map doesn't
-// get executed.
-// That means that `c` still contains "6 is positive" and that's correct.
-// Since `c` hasn't been updated, that means next value hasn't been produced,
+// The sum of the latest values, `4 + (-8)`, is `-4`.
+// Since this is not `>= 0`, `map` doesn't get executed.
+// This means that `c` still contains "6 is positive"
+// Since `c` hasn't been updated, a new "next" value hasn't been produced,
 // and `{ print($0) }` won't be called.
-
-// ...
 ```
 
 ## Simple UI bindings
 
-* instead of binding to variables, let's bind to text field values (rx_text)
-* next, parse that into an int and calculate if the number is prime using an async API (map)
-* if text field value is changed before async call completes, new async call will be enqueued (concat)
-* bind results to label (bindTo(resultLabel.rx_text))
+* Instead of binding to variables, let's bind to `UITextField` values using the `rx.text` property
+* Next, `map` the `String` into an `Int` and determine if the number is prime using an async API
+* If the text is changed before the async call completes, a new async call will replace it via `concat`
+* Bind the results to a `UILabel`
 
 ```swift
-let subscription/*: Disposable */ = primeTextField.rx_text      // type is Observable<String>
-            .map { WolframAlphaIsPrime(Int($0) ?? 0) }       // type is Observable<Observable<Prime>>
+let subscription/*: Disposable */ = primeTextField.rx.text      // type is Observable<String>
+            .map { WolframAlphaIsPrime(Int($0) ?? 0) }          // type is Observable<Observable<Prime>>
             .concat()                                           // type is Observable<Prime>
             .map { "number \($0.n) is prime? \($0.isPrime)" }   // type is Observable<String>
-            .bindTo(resultLabel.rx_text)                        // return Disposable that can be used to unbind everything
+            .bindTo(resultLabel.rx.text)                        // return Disposable that can be used to unbind everything
 
-// This will set resultLabel.text to "number 43 is prime? true" after
+// This will set `resultLabel.text` to "number 43 is prime? true" after
 // server call completes.
 primeTextField.text = "43"
 
@@ -104,13 +94,13 @@ primeTextField.text = "43"
 subscription.dispose()
 ```
 
-All of the operators used in this example are the same operators used in the first example with variables. Nothing special about it.
+All of the operators used in this example are the same operators used in the first example with variables. There's nothing special about it.
 
 ## Autocomplete
 
-If you are new to Rx, next example will probably be a little overwhelming, but it's here to demonstrate how RxSwift code looks like in real world examples.
+If you are new to Rx, the next example will probably be a little overwhelming at first. However, it's here to demonstrate how RxSwift code looks in the real-world.
 
-The third example is a real world, complex UI async validation logic, with progress notifications.
+This example contains complex async UI validation logic with progress notifications.
 All operations are cancelled the moment `disposeBag` is deallocated.
 
 Let's give it a shot.
@@ -118,31 +108,31 @@ Let's give it a shot.
 ```swift
 // bind UI control values directly
 // use username from `usernameOutlet` as username values source
-self.usernameOutlet.rx_text
+self.usernameOutlet.rx.text
     .map { username in
 
         // synchronous validation, nothing special here
         if username.isEmpty {
             // Convenience for constructing synchronous result.
-            // In case there is mixed synchronous and asychronous code inside the same
-            // method, this will construct an async result that is resolved immediatelly.
+            // In case there is mixed synchronous and asynchronous code inside the same
+            // method, this will construct an async result that is resolved immediately.
             return Observable.just((valid: false, message: "Username can't be empty."))
         }
 
-        ...
+        // ...
 
-        // Every user interface probably shows some state while async operation
-        // is executing.
-        // Let's assume that we want to show "Checking availability" while waiting for result.
-        // valid parameter can be
+        // User interfaces should probably show some state while async operations
+        // are executing.
+        // Let's assume that we want to show "Checking availability" while waiting for a result.
+        // Valid parameters can be:
         //  * true  - is valid
-        //  * false - not valid
+        //  * false - is not valid
         //  * nil   - validation pending
-        typealias LoadingInfo = (valid : String?, message: String?)
+        typealias LoadingInfo = (valid: String?, message: String?)
         let loadingValue : LoadingInfo = (valid: nil, message: "Checking availability ...")
 
         // This will fire a server call to check if the username already exists.
-        // Guess what, its type is `Observable<ValidationResult>`
+        // Its type is `Observable<ValidationResult>`
         return API.usernameAvailable(username)
           .map { available in
               if available {
@@ -156,26 +146,25 @@ self.usernameOutlet.rx_text
           .startWith(loadingValue)
     }
 // Since we now have `Observable<Observable<ValidationResult>>`
-// we somehow need to return to normal `Observable` world.
-// We could use `concat` operator from second example, but we really
-// want to cancel pending asynchronous operation if new username is
-// provided.
-// That's what `switchLatest` does
+// we need to somehow return to a simple `Observable<ValidationResult>`.
+// We could use the `concat` operator from the second example, but we really
+// want to cancel pending asynchronous operations if a new username is provided.
+// That's what `switchLatest` does.
     .switchLatest()
 // Now we need to bind that to the user interface somehow.
-// Good old `subscribeNext` can do that
+// Good old `subscribe(onNext:)` can do that.
 // That's the end of `Observable` chain.
-// This will produce a `Disposable` object that can unbind everything and cancel
-// pending async operations.
-    .subscribeNext { valid in
+    .subscribe(onNext: { valid in
         errorLabel.textColor = validationColor(valid)
         errorLabel.text = valid.message
-    }
-// Why would we do it manually, that's tedious,
-// let's dispose everything automagically on view controller dealloc.
+    })
+// This will produce a `Disposable` object that can unbind everything and cancel
+// pending async operations.
+// Instead of doing it manually, which is tedious,
+// let's dispose everything automagically upon view controller dealloc.
     .addDisposableTo(disposeBag)
 ```
 
-Can't get any simpler than this. There are [more examples](../RxExample) in the repository, so feel free to check them out.
+It doesn't get any simpler than that. There are [more examples](../RxExample) in the repository, so feel free to check them out.
 
-They include examples on how to use it in the context of MVVM pattern or without it.
+They include examples on how to use Rx in the context of MVVM pattern or without it.

Documentation/GettingStarted.md

@@ -26,11 +26,13 @@ This project tries to be consistent with [ReactiveX.io](http://reactivex.io/). T
 # Observables aka Sequences
 
 ## Basics
-The [Equivalence](MathBehindRx.md) of observer patterns (`Observable<Element>`) and sequences (`Generator`s)
-is one of the most important things to understand about Rx.
+The [equivalence](MathBehindRx.md) of observer pattern (`Observable<Element>` sequence) and normal sequences (`SequenceType`) is the most important thing to understand about Rx.
 
-The observer pattern is needed because we want to model asynchronous behavior.
-That equivalence enables the implementation of high level sequence operations as operators on `Observable`s.
+**Every `Observable` sequence is just a sequence. The key advantage for an `Observable` vs Swift's `SequenceType` is that it can also receive elements asynchronously. This is the kernel of the RxSwift, documentation from here is about ways that we expand on that idea.**
+
+* `Observable`(`ObservableType`) is equivalent to `SequenceType`
+* `ObservableType.subscribe` method is equivalent to `SequenceType.generate` method.
+* Observer (callback) needs to be passed to `ObservableType.subscribe` method to receive sequence elements instead of calling `next()` on the returned generator.
 
 Sequences are a simple, familiar concept that is **easy to visualize**.
 
@@ -65,32 +67,32 @@ These are called marble diagrams. There are more marble diagrams at [rxmarbles.c
 
 If we were to specify sequence grammar as a regular expression it would look like:
 
-**Next* (Error | Completed)?**
+**next* (error | completed)?**
 
 This describes the following:
 
 * **Sequences can have 0 or more elements.**
-* **Once an `Error` or `Completed` event is received, the sequence cannot produce any other element.**
+* **Once an `error` or `completed` event is received, the sequence cannot produce any other element.**
 
 Sequences in Rx are described by a push interface (aka callback).
 
 ```swift
 enum Event<Element>  {
-    case Next(Element)      // next element of a sequence
-    case Error(ErrorType)   // sequence failed with error
-    case Completed          // sequence terminated successfully
+    case next(Element)      // next element of a sequence
+    case error(Swift.Error) // sequence failed with error
+    case completed          // sequence terminated successfully
 }
 
 class Observable<Element> {
-    func subscribe(observer: Observer<Element>) -> Disposable
+    func subscribe(_ observer: Observer<Element>) -> Disposable
 }
 
 protocol ObserverType {
-    func on(event: Event<Element>)
+    func on(_ event: Event<Element>)
 }
 ```
 
-**When a sequence sends the `Complete` or `Error` event all internal resources that compute sequence elements will be freed.**
+**When a sequence sends the `completed` or `error` event all internal resources that compute sequence elements will be freed.**
 
 **To cancel production of sequence elements and free resources immediately, call `dispose` on the returned subscription.**
 
@@ -100,7 +102,7 @@ If a sequence does not terminate in some way, resources will be allocated perman
 
 **Using dispose bags or `takeUntil` operator is a robust way of making sure resources are cleaned up. We recommend using them in production even if the sequences will terminate in finite time.**
 
-In case you are curious why `ErrorType` isn't generic, you can find explanation [here](DesignRationale.md#why-error-type-isnt-generic).
+In case you are curious why `Swift.Error` isn't generic, you can find explanation [here](DesignRationale.md#why-error-type-isnt-generic).
 
 ## Disposing
 
@@ -114,7 +116,7 @@ let subscription = Observable<Int>.interval(0.3, scheduler: scheduler)
         print(event)
     }
 
-NSThread.sleepForTimeInterval(2)
+NSThread.sleep(forTimeInterval: 2.0)
 
 subscription.dispose()
 
@@ -131,7 +133,7 @@ This will print:
 5
 ```
 
-Note the you usually do not want to manually call `dispose`; this is only educational example. Calling dispose manually is usually a bad code smell. There are better ways to dispose subscriptions. We can use `DisposeBag`, the `takeUntil` operator, or some other mechanism.
+Note that you usually do not want to manually call `dispose`; this is only educational example. Calling dispose manually is usually a bad code smell. There are better ways to dispose subscriptions. We can use `DisposeBag`, the `takeUntil` operator, or some other mechanism.
 
 So can this code print something after the `dispose` call executed? The answer is: it depends.
 
@@ -206,7 +208,7 @@ Additional way to automatically dispose subscription on dealloc is to use `takeU
 
 ```swift
 sequence
-    .takeUntil(self.rx_deallocated)
+    .takeUntil(self.rx.deallocated)
     .subscribe {
         print($0)
     }
@@ -216,9 +218,9 @@ sequence
 
 There is also a couple of additional guarantees that all sequence producers (`Observable`s) must honor.
 
-It doesn't matter on which thread they produce elements, but if they generate one element and send it to the observer `observer.on(.Next(nextElement))`, they can't send next element until `observer.on` method has finished execution.
+It doesn't matter on which thread they produce elements, but if they generate one element and send it to the observer `observer.on(.next(nextElement))`, they can't send next element until `observer.on` method has finished execution.
 
-Producers also cannot send terminating `.Completed` or `.Error` in case `.Next` event hasn't finished.
+Producers also cannot send terminating `.completed` or `.error` in case `.next` event hasn't finished.
 
 In short, consider this example:
 
@@ -274,9 +276,9 @@ let searchForMe = searchWikipedia("me")
 
 let cancel = searchForMe
   // sequence generation starts now, URL requests are fired
-  .subscribeNext { results in
+  .subscribe(onNext: { results in
       print(results)
-  }
+  })
 
 ```
 
@@ -289,16 +291,16 @@ Let's create a function which creates a sequence that returns one element upon s
 ```swift
 func myJust<E>(element: E) -> Observable<E> {
     return Observable.create { observer in
-        observer.on(.Next(element))
-        observer.on(.Completed)
-        return NopDisposable.instance
+        observer.on(.next(element))
+        observer.on(.completed)
+        return Disposables.create()
     }
 }
 
 myJust(0)
-    .subscribeNext { n in
+    .subscribe(onNext: { n in
       print(n)
-    }
+    })
 ```
 
 this will print:
@@ -323,11 +325,11 @@ Lets now create an observable that returns elements from an array.
 func myFrom<E>(sequence: [E]) -> Observable<E> {
     return Observable.create { observer in
         for element in sequence {
-            observer.on(.Next(element))
+            observer.on(.next(element))
         }
 
-        observer.on(.Completed)
-        return NopDisposable.instance
+        observer.on(.completed)
+        return Disposables.create()
     }
 }
 
@@ -337,17 +339,17 @@ print("Started ----")
 
 // first time
 stringCounter
-    .subscribeNext { n in
+    .subscribe(onNext: { n in
         print(n)
-    }
+    })
 
 print("----")
 
 // again
 stringCounter
-    .subscribeNext { n in
+    .subscribe(onNext: { n in
         print(n)
-    }
+    })
 
 print("Ended ----")
 ```
@@ -380,15 +382,15 @@ func myInterval(interval: NSTimeInterval) -> Observable<Int> {
         var next = 0
 
         dispatch_source_set_timer(timer, 0, UInt64(interval * Double(NSEC_PER_SEC)), 0)
-        let cancel = AnonymousDisposable {
+        let cancel = Disposables.create {
             print("Disposed")
             dispatch_source_cancel(timer)
         }
         dispatch_source_set_event_handler(timer, {
-            if cancel.disposed {
+            if cancel.isDisposed {
                 return
             }
-            observer.on(.Next(next))
+            observer.on(.next(next))
             next += 1
         })
         dispatch_resume(timer)
@@ -404,11 +406,12 @@ let counter = myInterval(0.1)
 print("Started ----")
 
 let subscription = counter
-    .subscribeNext { n in
+    .subscribe(onNext: { n in
        print(n)
-    }
+    })
 
-NSThread.sleepForTimeInterval(0.5)
+
+NSThread.sleep(forTimeInterval: 0.5)
 
 subscription.dispose()
 
@@ -436,19 +439,19 @@ let counter = myInterval(0.1)
 print("Started ----")
 
 let subscription1 = counter
-    .subscribeNext { n in
+    .subscribe(onNext: { n in
        print("First \(n)")
-    }
+    })
 let subscription2 = counter
-    .subscribeNext { n in
+    .subscribe(onNext: { n in
        print("Second \(n)")
-    }
+    })
 
-NSThread.sleepForTimeInterval(0.5)
+NSThread.sleep(forTimeInterval: 0.5)
 
 subscription1.dispose()
 
-NSThread.sleepForTimeInterval(0.5)
+NSThread.sleep(forTimeInterval: 0.5)
 
 subscription2.dispose()
 
@@ -501,13 +504,13 @@ let counter = myInterval(0.1)
 print("Started ----")
 
 let subscription1 = counter
-    .subscribeNext { n in
+    .subscribe(onNext: { n in
        print("First \(n)")
-    }
+    })
 let subscription2 = counter
-    .subscribeNext { n in
+    .subscribe(onNext: { n in
        print("Second \(n)")
-    }
+    })
 
 NSThread.sleepForTimeInterval(0.5)
 
@@ -552,27 +555,27 @@ Behavior for URL observables is equivalent.
 This is how HTTP requests are wrapped in Rx. It's pretty much the same pattern like the `interval` operator.
 
 ```swift
-extension NSURLSession {
-    public func rx_response(request: NSURLRequest) -> Observable<(NSData, NSURLResponse)> {
+extension Reactive where Base: NSURLSession {
+    public func response(request: NSURLRequest) -> Observable<(NSData, NSURLResponse)> {
         return Observable.create { observer in
             let task = self.dataTaskWithRequest(request) { (data, response, error) in
                 guard let response = response, data = data else {
-                    observer.on(.Error(error ?? RxCocoaURLError.Unknown))
+                    observer.on(.error(error ?? RxCocoaURLError.Unknown))
                     return
                 }
 
                 guard let httpResponse = response as? NSHTTPURLResponse else {
-                    observer.on(.Error(RxCocoaURLError.NonHTTPResponse(response: response)))
+                    observer.on(.error(RxCocoaURLError.nonHTTPResponse(response: response)))
                     return
                 }
 
-                observer.on(.Next(data, httpResponse))
-                observer.on(.Completed)
+                observer.on(.next(data, httpResponse))
+                observer.on(.completed)
             }
 
             task.resume()
 
-            return AnonymousDisposable {
+            return Disposables.create {
                 task.cancel()
             }
         }
@@ -590,7 +593,7 @@ Almost all operators are demonstrated in [Playgrounds](../Rx.playground).
 
 To use playgrounds please open `Rx.xcworkspace`, build `RxSwift-OSX` scheme and then open playgrounds in `Rx.xcworkspace` tree view.
 
-In case you need an operator, and don't know how to find it there a [decision tree of operators]() http://reactivex.io/documentation/operators.html#tree).
+In case you need an operator, and don't know how to find it there a [decision tree of operators](http://reactivex.io/documentation/operators.html#tree).
 
 [Supported RxSwift operators](API.md#rxswift-supported-operators) are also grouped by function they perform, so that can also help.
 
@@ -612,13 +615,13 @@ extension ObservableType {
         return Observable.create { observer in
             let subscription = self.subscribe { e in
                     switch e {
-                    case .Next(let value):
+                    case .next(let value):
                         let result = transform(value)
-                        observer.on(.Next(result))
-                    case .Error(let error):
-                        observer.on(.Error(error))
-                    case .Completed:
-                        observer.on(.Completed)
+                        observer.on(.next(result))
+                    case .error(let error):
+                        observer.on(.error(error))
+                    case .completed:
+                        observer.on(.completed)
                     }
                 }
 
@@ -635,9 +638,9 @@ let subscription = myInterval(0.1)
     .myMap { e in
         return "This is simply \(e)"
     }
-    .subscribeNext { n in
+    .subscribe(onNext: { n in
         print(n)
-    }
+    })
 ```
 
 and this will print
@@ -666,9 +669,9 @@ This isn't something that should be practiced often, and is a bad code smell, bu
   let magicBeings: Observable<MagicBeing> = summonFromMiddleEarth()
 
   magicBeings
-    .subscribeNext { being in     // exit the Rx monad  
+    .subscribe(onNext: { being in     // exit the Rx monad  
         self.doSomeStateMagic(being)
-    }
+    })
     .addDisposableTo(disposeBag)
 
   //
@@ -678,7 +681,7 @@ This isn't something that should be practiced often, and is a bad code smell, bu
     being,
     UIApplication.delegate.dataSomething.attendees
   )
-  kittens.on(.Next(kitten))   // send result back to rx
+  kittens.on(.next(kitten))   // send result back to rx
   //
   // Another mess
   //
@@ -696,9 +699,9 @@ Every time you do this, somebody will probably write this code somewhere
 
 ```swift
   kittens
-    .subscribeNext { kitten in
+    .subscribe(onNext: { kitten in
       // so something with kitten
-    }
+    })
     .addDisposableTo(disposeBag)
 ```
 
@@ -714,7 +717,7 @@ If you are unsure how exactly some of the operators work, [playgrounds](../Rx.pl
 
 ## Error handling
 
-The are two error mechanisms.
+There are two error mechanisms.
 
 ### Asynchronous error handling mechanism in observables
 
@@ -781,9 +784,9 @@ let subscription = myInterval(0.1)
     .map { e in
         return "This is simply \(e)"
     }
-    .subscribeNext { n in
+    .subscribe(onNext: { n in
         print(n)
-    }
+    })
 
 NSThread.sleepForTimeInterval(0.5)
 
@@ -795,15 +798,15 @@ will print
 ```
 [my probe] subscribed
 Subscribed
-[my probe] -> Event Next(Box(0))
+[my probe] -> Event next(Box(0))
 This is simply 0
-[my probe] -> Event Next(Box(1))
+[my probe] -> Event next(Box(1))
 This is simply 1
-[my probe] -> Event Next(Box(2))
+[my probe] -> Event next(Box(2))
 This is simply 2
-[my probe] -> Event Next(Box(3))
+[my probe] -> Event next(Box(3))
 This is simply 3
-[my probe] -> Event Next(Box(4))
+[my probe] -> Event next(Box(4))
 This is simply 4
 [my probe] dispose
 Disposed
@@ -819,17 +822,17 @@ extension ObservableType {
             let subscription = self.subscribe { e in
                 print("event \(identifier)  \(e)")
                 switch e {
-                case .Next(let value):
-                    observer.on(.Next(value))
+                case .next(let value):
+                    observer.on(.next(value))
 
-                case .Error(let error):
-                    observer.on(.Error(error))
+                case .error(let error):
+                    observer.on(.error(error))
 
-                case .Completed:
-                    observer.on(.Completed)
+                case .completed:
+                    observer.on(.completed)
                 }
             }
-            return AnonymousDisposable {
+            return Disposables.create {
                    print("disposing \(identifier)")
                    subscription.dispose()
             }
@@ -849,9 +852,9 @@ In case you want to have some resource leak detection logic, the simplest method
     func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool
     */
     _ = Observable<Int>.interval(1, scheduler: MainScheduler.instance)
-        .subscribeNext { _ in
-        print("Resource count \(RxSwift.resourceCount)")
-    }
+        .subscribe(onNext: { _ in
+            print("Resource count \(RxSwift.resourceCount)")
+        })
 ```
 
 Most efficient way to test for memory leaks is:
@@ -873,7 +876,7 @@ The reason why 2 navigations are suggested is because first navigation forces lo
 
 Variable wraps a [`Subject`](http://reactivex.io/documentation/subject.html). More specifically it is a `BehaviorSubject`.  Unlike `BehaviorSubject`, it only exposes `value` interface, so variable can never terminate or fail.
 
-It will also broadcast it's current value immediately on subscription.
+It will also broadcast its current value immediately on subscription.
 
 After variable is deallocated, it will complete the observable sequence returned from `.asObservable()`.
 
@@ -931,14 +934,14 @@ There are two built in ways this library supports KVO.
 
 ```swift
 // KVO
-extension NSObject {
-    public func rx_observe<E>(type: E.Type, _ keyPath: String, options: NSKeyValueObservingOptions, retainSelf: Bool = true) -> Observable<E?> {}
+extension Reactive where Base: NSObject {
+    public func observe<E>(type: E.Type, _ keyPath: String, options: NSKeyValueObservingOptions, retainSelf: Bool = true) -> Observable<E?> {}
 }
 
 #if !DISABLE_SWIZZLING
 // KVO
-extension NSObject {
-    public func rx_observeWeakly<E>(type: E.Type, _ keyPath: String, options: NSKeyValueObservingOptions) -> Observable<E?> {}
+extension Reactive where Base: NSObject {
+    public func observeWeakly<E>(type: E.Type, _ keyPath: String, options: NSKeyValueObservingOptions) -> Observable<E?> {}
 }
 #endif
 ```
@@ -949,25 +952,25 @@ Example how to observe frame of `UIView`.
 
 ```swift
 view
-  .rx_observe(CGRect.self, "frame")
-  .subscribeNext { frame in
+  .rx.observe(CGRect.self, "frame")
+  .subscribe(onNext: { frame in
     ...
-  }
+  })
 ```
 
 or
 
 ```swift
 view
-  .rx_observeWeakly(CGRect.self, "frame")
-  .subscribeNext { frame in
+  .rx.observeWeakly(CGRect.self, "frame")
+  .subscribe(onNext: { frame in
     ...
-  }
+  })
 ```
 
-### `rx_observe`
+### `rx.observe`
 
-`rx_observe` is more performant because it's just a simple wrapper around KVO mechanism, but it has more limited usage scenarios
+`rx.observe` is more performant because it's just a simple wrapper around KVO mechanism, but it has more limited usage scenarios
 
 * it can be used to observe paths starting from `self` or from ancestors in ownership graph (`retainSelf = false`)
 * it can be used to observe paths starting from descendants in ownership graph (`retainSelf = true`)
@@ -976,14 +979,14 @@ view
 E.g.
 
 ```swift
-self.rx_observe(CGRect.self, "view.frame", retainSelf: false)
+self.rx.observe(CGRect.self, "view.frame", retainSelf: false)
 ```
 
-### `rx_observeWeakly`
+### `rx.observeWeakly`
 
-`rx_observeWeakly` has somewhat slower than `rx_observe` because it has to handle object deallocation in case of weak references.
+`rx.observeWeakly` has somewhat slower than `rx.observe` because it has to handle object deallocation in case of weak references.
 
-It can be used in all cases where `rx_observe` can be used and additionally
+It can be used in all cases where `rx.observe` can be used and additionally
 
 * because it won't retain observed target, it can be used to observe arbitrary object graph whose ownership relation is unknown
 * it can be used to observe `weak` properties
@@ -991,7 +994,7 @@ It can be used in all cases where `rx_observe` can be used and additionally
 E.g.
 
 ```swift
-someSuspiciousViewController.rx_observeWeakly(Bool.self, "behavingOk")
+someSuspiciousViewController.rx.observeWeakly(Bool.self, "behavingOk")
 ```
 
 ### Observing structs
@@ -1002,7 +1005,7 @@ KVO is an Objective-C mechanism so it relies heavily on `NSValue`.
 
 When observing some other structures it is necessary to extract those structures from `NSValue` manually.
 
-[Here](../RxCocoa/Common/KVORepresentable+CoreGraphics.swift) are examples how to extend KVO observing mechanism and `rx_observe*` methods for other structs by implementing `KVORepresentable` protocol.
+[Here](../RxCocoa/Common/KVORepresentable+CoreGraphics.swift) are examples how to extend KVO observing mechanism and `rx.observe*` methods for other structs by implementing `KVORepresentable` protocol.
 
 ## UI layer tips
 
@@ -1068,18 +1071,18 @@ let request = NSURLRequest(URL: NSURL(string: "http://en.wikipedia.org/w/api.php
 If you want to just execute that request outside of composition with other observables, this is what needs to be done.
 
 ```swift
-let responseJSON = NSURLSession.sharedSession().rx_JSON(request)
+let responseJSON = NSURLSession.sharedSession().rx.JSON(request)
 
 // no requests will be performed up to this point
 // `responseJSON` is just a description how to fetch the response
 
 let cancelRequest = responseJSON
     // this will fire the request
-    .subscribeNext { json in
+    .subscribe(onNext: { json in
         print(json)
-    }
+    })
 
-NSThread.sleepForTimeInterval(3)
+NSThread.sleep(forTimeInterval: 3.0)
 
 // if you want to cancel request after 3 seconds have passed just call
 cancelRequest.dispose()
@@ -1091,7 +1094,7 @@ cancelRequest.dispose()
 In case you want a more low level access to response, you can use:
 
 ```swift
-NSURLSession.sharedSession().rx_response(myNSURLRequest)
+NSURLSession.shared.rx.response(myNSURLRequest)
     .debug("my request") // this will print out information to console
     .flatMap { (data: NSData!, response: NSURLResponse!) -> Observable<String> in
         if let response = response as? NSHTTPURLResponse {
@@ -1099,12 +1102,12 @@ NSURLSession.sharedSession().rx_response(myNSURLRequest)
                 return just(transform(data))
             }
             else {
-                return failWith(yourNSError)
+                return Observable.error(yourNSError)
             }
         }
         else {
             rxFatalError("response = nil")
-            return failWith(yourNSError)
+            return Observable.error(yourNSError)
         }
     }
     .subscribe { event in

Documentation/IssueTemplate.md

@@ -1,47 +0,0 @@
-**Please copy the following template [here](https://github.com/ReactiveX/RxSwift/issues/new) and fill in the missing fields so we can help you as soon as possible.**
-
-**If you don't have something to report in the following format, maybe you don't really have an issue an it's easier and faster to resolve doubts in [slack channel](http://http://slack.rxswift.org/) first.**
-
-```
-*Short description*:
-
-  description here
-
-*Code that reproduces the issue*:
-
-  code goes here
-
-*Xcode version*:
-
-  Xcode version goes here
-
-*Expected outcome*:
-
-  what do you expect to happen goes here
-
-*What actually happens*:
-
-  what actually happens goes here
-
-// filling additional information below is optional, but resolving your issue could be potentially a lot faster
-
-*Integration method*:
-  (so we don't lose time investigating wrong integration)
-  * CocoaPods
-  * Carthage
-  * Git submodules
-
-*I have multiple versions of Xcode installed*:
-  (so we can understand can this cause your issue)
-  * yes (which ones)
-  * no
-
-*How long have I been using this project*:
-  (this is so we can understand your level of knowledge
-    and formulate the response in an appropriate manner)
-  * just starting
-  * I have a small code base
-  * I have a significant code base
-
-
-```

Documentation/Linux.md

@@ -16,10 +16,10 @@ let package = Package(
 )
 ```
 
-What does work:
+What works:
 * Distribution using Swift Package Manager
 * Single Threaded mode (CurrentThreadScheduler)
-* Half of unit tests are passing.
+* Half of the unit tests are passing.
 * Projects that can be compiled and "used":
     * RxSwift
     * RxBlocking
@@ -28,4 +28,4 @@ What does work:
 What doesn't work:
 * Schedulers - because they are dependent on https://github.com/apple/swift-corelibs-libdispatch and it still hasn't been released
 * Multithreading - still no access to c11 locks
-* For some reason it looks like Swift compiler generates wrong code when using `ErrorType` on `Linux`, so don't use errors, otherwise you can get weird crashes.
+* For some reason it looks like Swift compiler generates wrong code when using `Swift.Error` on `Linux`, so don't use errors, otherwise you can get weird crashes.

Documentation/MathBehindRx.md

@@ -3,11 +3,11 @@ Math Behind Rx
 
 ## Duality between Observer and Iterator / Enumerator / Generator / Sequences
 
-There is a duality between the observer and generator patterns. This is what enables us to transition from the async callback world to synchronous world of sequence transformations.
+There is a duality between the observer and generator patterns. This is what enables us to transition from the async callback world to the synchronous world of sequence transformations.
 
-In short, the enumerator and observer patterns both describe sequences. It's fairly obvious why the  enumerator defines a sequence, but the observer is slightly more complicated.
+In short, the enumerator and observer patterns both describe sequences. It's fairly obvious why the enumerator defines a sequence, but the observer is slightly more complicated.
 
-There is, however, a pretty simple example that doesn't require a lot of mathematical knowledge. Assume that you are observing the position of your mouse cursor on screen at given time periods. Over time, these mouse positions form a sequence. This is, in essence, an observer sequence.
+There is, however, a pretty simple example that doesn't require a lot of mathematical knowledge. Assume that you are observing the position of your mouse cursor on screen at given times. Over time, these mouse positions form a sequence. This is, in essence, an observable sequence.
 
 There are two basic ways elements of a sequence can be accessed:
 

Documentation/Migration.md

@@ -1,26 +1,26 @@
-# Migration from RxSwift 1.9 to RxSwift 2.0 version
+# Migration from RxSwift 1.9 to RxSwift 2.0
 
-The migration should be pretty straightforward. The changes are mostly cosmetic, so all features are still there.
+The migration should be pretty straightforward. Changes are mostly cosmetic, so all features are still there.
 
 * Find replace all `>- ` to `.`
-* Find replace all "variable" to "shareReplay(1)"
-* Find replace all "catch" to "catchErrorJustReturn"
-* Find replace all "returnElement" to "Observable.just"
-* Find replace all "failWith" to "Observable.error"
-* Find replace all "never" to "Observable.never"
-* Find replace all "empty" to "Observable.empty"
-* Since we've moved from `>-` to `.`, free functions are now methods, so it's `.switchLatest()`, `.distinctUntilChanged()`, ... instead of `>- switchLatest`, `>- distinctUntilChanged`
-* we've moved from free functions to extensions so it's now `[a, b, c].concat()`, `.merge()`, ... instead of `concat([a, b, c])`, `merge(sequences)`
-* Now it's `subscribe { n in ... }.addDisposableTo(disposeBag)` instead of `>- disposeBag.addDisposable`
-* Method `next` on `Variable` is now `value` setter
-* If you want to use `tableViews`/`collectionViews`, this is the basic use case now
+* Find replace all `variable` to `shareReplay(1)`
+* Find replace all `catch` to `catchErrorJustReturn`
+* Find replace all `returnElement` to `Observable.just`
+* Find replace all `failWith` to `Observable.error`
+* Find replace all `never` to `Observable.never`
+* Find replace all `empty` to `Observable.empty`
+* Since we've moved from `>-` to `.`, free functions are now methods, so use `.switchLatest()`, `.distinctUntilChanged()`, ... instead of `>- switchLatest`, `>- distinctUntilChanged`
+* We've moved from free functions to extensions so it's now `[a, b, c].concat()`, `.merge()`, ... instead of `concat([a, b, c])`, `merge(sequences)`
+* Similarly, it's now `subscribe { n in ... }.addDisposableTo(disposeBag)` instead of `>- disposeBag.addDisposable`
+* The method `next` on `Variable` is now `value` setter
+* If you want to use `UITableView` and/or  `UICollectionView`, this is the basic use case now:
 
 ```swift
 viewModel.rows
-            .bindTo(resultsTableView.rx_itemsWithCellIdentifier("WikipediaSearchCell", cellType: WikipediaSearchCell.self)) { (_, viewModel, cell) in
-                cell.viewModel = viewModel
-            }
-            .addDisposableTo(disposeBag)
+    .bindTo(resultsTableView.rx_itemsWithCellIdentifier("WikipediaSearchCell", cellType: WikipediaSearchCell.self)) { (_, viewModel, cell) in
+        cell.viewModel = viewModel
+    }
+    .addDisposableTo(disposeBag)
 ```
 
-If you have any more doubts how to write some concept in RxSwift 2.0 version, check out [Example app](../RxExample) or playgrounds.
+If you have any doubts about how some concept in RxSwift 2.0 works, check out the [Example app](../RxExample) or playgrounds.

Documentation/Playgrounds.md

@@ -3,6 +3,6 @@
 To use playgrounds:
 
 * Open `Rx.xcworkspace`
-* Build `RxSwift-OSX` scheme
-* And then open `Rx` playground in `Rx.xcworkspace` tree view.
-* Choose `View > Show Debug Area`
+* Build the `RxSwift-OSX` scheme
+* Open `Rx` playground in the `Rx.xcworkspace` tree view.
+* Choose `View > Debug Area > Show Debug Area`

Documentation/Schedulers.md

@@ -5,37 +5,37 @@ Schedulers
 1. [Custom schedulers](#custom-schedulers)
 1. [Builtin schedulers](#builtin-schedulers)
 
-Schedulers abstract away mechanism for performing work.
+Schedulers abstract away the mechanism for performing work.
 
-Different mechanisms for performing work include, current thread, dispatch queues, operation queues, new threads, thread pools, run loops ...
+Different mechanisms for performing work include the current thread, dispatch queues, operation queues, new threads, thread pools, and run loops.
 
-There are two main operators that work with schedulers. `observeOn` and `subscribeOn`.
+There are two main operators that work with schedulers, `observeOn` and `subscribeOn`.
 
-If you want to perform work on different scheduler just use `observeOn(scheduler)` operator.
+If you want to perform work on a different scheduler just use `observeOn(scheduler)` operator.
 
-You would usually use `observeOn` a lot more often then `subscribeOn`.
+You would usually use `observeOn` a lot more often than `subscribeOn`.
 
-In case `observeOn` isn't explicitly specified, work will be performed on which ever thread/scheduler elements are generated.
+In case `observeOn` isn't explicitly specified, work will be performed on whichever thread/scheduler elements are generated.
 
-Example of using `observeOn` operator
+Example of using the `observeOn` operator:
 
 ```
 sequence1
   .observeOn(backgroundScheduler)
   .map { n in
-      print("This is performed on background scheduler")
+      print("This is performed on the background scheduler")
   }
   .observeOn(MainScheduler.instance)
   .map { n in
-      print("This is performed on main scheduler")
+      print("This is performed on the main scheduler")
   }
 ```
 
 If you want to start sequence generation (`subscribe` method) and call dispose on a specific scheduler, use `subscribeOn(scheduler)`.
 
-In case `subscribeOn` isn't explicitly specified, `subscribe` method will be called on the same thread/scheduler that `subscribeNext` or `subscribe` is called.
+In case `subscribeOn` isn't explicitly specified, the `subscribe` method will be called on the same thread/scheduler on which `subscribe(onNext:)` or `subscribe` is called.
 
-In case `subscribeOn` isn't explicitly specified, `dispose` method will be called on the same thread/scheduler that initiated disposing.
+In case `subscribeOn` isn't explicitly specified, the `dispose` method will be called on the same thread/scheduler that initiated disposing.
 
 In short, if no explicit scheduler is chosen, those methods will be called on current thread/scheduler.
 
@@ -43,19 +43,19 @@ In short, if no explicit scheduler is chosen, those methods will be called on cu
 
 Since schedulers can really be anything, and all operators that transform sequences need to preserve additional [implicit guarantees](GettingStarted.md#implicit-observable-guarantees), it is important what kind of schedulers are you creating.
 
-In case scheduler is concurrent, Rx's `observeOn` and `subscribeOn` operators will make sure everything works perfect.
+In case the scheduler is concurrent, Rx's `observeOn` and `subscribeOn` operators will make sure everything works perfectly.
 
-If you use some scheduler that for which Rx can prove that it's serial, it will able to perform additional optimizations.
+If you use some scheduler that Rx can prove is serial, it will be able to perform additional optimizations.
 
-So far it only performing those optimizations for dispatch queue schedulers.
+So far it only performs those optimizations for dispatch queue schedulers.
 
-In case of serial dispatch queue schedulers `observeOn` is optimized to just a simple `dispatch_async` call.
+In case of serial dispatch queue schedulers, `observeOn` is optimized to just a simple `dispatch_async` call.
 
 # Custom schedulers
 
 Besides current schedulers, you can write your own schedulers.
 
-If you just want to describe who needs to perform work immediately, you can create your own scheduler by implementing `ImmediateScheduler` protocol.
+If you just want to describe who needs to perform work immediately, you can create your own scheduler by implementing the `ImmediateScheduler` protocol.
 
 ```swift
 public protocol ImmediateScheduler {
@@ -63,7 +63,7 @@ public protocol ImmediateScheduler {
 }
 ```
 
-If you want to create new scheduler that supports time based operations, then you'll need to implement.
+If you want to create a new scheduler that supports time based operations, then you'll need to implement the `Scheduler` protocol:
 
 ```swift
 public protocol Scheduler: ImmediateScheduler {
@@ -78,7 +78,7 @@ public protocol Scheduler: ImmediateScheduler {
 }
 ```
 
-In case scheduler only has periodic scheduling capabilities, you can inform Rx by implementing `PeriodicScheduler` protocol
+In case the scheduler only has periodic scheduling capabilities, you can inform Rx by implementing the `PeriodicScheduler` protocol:
 
 ```swift
 public protocol PeriodicScheduler : Scheduler {
@@ -86,47 +86,47 @@ public protocol PeriodicScheduler : Scheduler {
 }
 ```
 
-In case scheduler doesn't support `PeriodicScheduling` capabilities, Rx will emulate periodic scheduling transparently.
+In case the scheduler doesn't support `PeriodicScheduling` capabilities, Rx will emulate periodic scheduling transparently.
 
 # Builtin schedulers
 
 Rx can use all types of schedulers, but it can also perform some additional optimizations if it has proof that scheduler is serial.
 
-These are currently supported schedulers
+These are the currently supported schedulers:
 
 ## CurrentThreadScheduler (Serial scheduler)
 
 Schedules units of work on the current thread.
 This is the default scheduler for operators that generate elements.
 
-This scheduler is also sometimes called `trampoline scheduler`.
+This scheduler is also sometimes called a "trampoline scheduler".
 
-If `CurrentThreadScheduler.instance.schedule(state) { }` is called for first time on some thread, scheduled action will be executed immediately and hidden queue will be created where all recursively scheduled actions will be temporarily enqueued.
+If `CurrentThreadScheduler.instance.schedule(state) { }` is called for the first time on some thread, the scheduled action will be executed immediately and a hidden queue will be created where all recursively scheduled actions will be temporarily enqueued.
 
-If some parent frame on call stack is already running `CurrentThreadScheduler.instance.schedule(state) { }`, scheduled action will be enqueued and executed when currently running action and all previously enqueued actions have finished executing.
+If some parent frame on the call stack is already running `CurrentThreadScheduler.instance.schedule(state) { }`, the scheduled action will be enqueued and executed when the currently running action and all previously enqueued actions have finished executing.
 
 ## MainScheduler (Serial scheduler)
 
-Abstracts work that needs to be performed on `MainThread`. In case `schedule` methods are called from main thread, it will perform action immediately without scheduling.
+Abstracts work that needs to be performed on `MainThread`. In case `schedule` methods are called from main thread, it will perform the action immediately without scheduling.
 
 This scheduler is usually used to perform UI work.
 
 ## SerialDispatchQueueScheduler (Serial scheduler)
 
-Abstracts the work that needs to be performed on a specific `dispatch_queue_t`. It will make sure that even if concurrent dispatch queue is passed, it's transformed into a serial one.
+Abstracts the work that needs to be performed on a specific `dispatch_queue_t`. It will make sure that even if a concurrent dispatch queue is passed, it's transformed into a serial one.
 
 Serial schedulers enable certain optimizations for `observeOn`.
 
-Main scheduler is an instance of `SerialDispatchQueueScheduler`.
+The main scheduler is an instance of `SerialDispatchQueueScheduler`.
 
 ## ConcurrentDispatchQueueScheduler (Concurrent scheduler)
 
 Abstracts the work that needs to be performed on a specific `dispatch_queue_t`. You can also pass a serial dispatch queue, it shouldn't cause any problems.
 
-This scheduler is suitable when some work needs to be performed in background.
+This scheduler is suitable when some work needs to be performed in the background.
 
 ## OperationQueueScheduler (Concurrent scheduler)
 
 Abstracts the work that needs to be performed on a specific `NSOperationQueue`.
 
-This scheduler is suitable for cases when there is some bigger chunk of work that needs to be performed in background and you want to fine tune concurrent processing using `maxConcurrentOperationCount`.
+This scheduler is suitable for cases when there is some bigger chunk of work that needs to be performed in the background and you want to fine tune concurrent processing using `maxConcurrentOperationCount`.

Documentation/Tips.md

@@ -23,7 +23,7 @@ extension ObservableType where E: MaybeCool {
 
   * Always use operators to compose subscriptions.
 
-  **Avoid nesting subscribe calls at all cost. This is a bad smell.**
+  **Avoid nesting subscribe calls at all cost. This is a code smell.**
 
   ```swift
   textField.rx_text.subscribeNext { text in

Documentation/UnitTests.md

@@ -3,7 +3,7 @@ Unit Tests
 
 ## Testing custom operators
 
-Library uses `RxTests` for all of RxSwift operator tests so you can take a look at AllTests-* target inside the project `Rx.xcworkspace`.
+RxSwift uses `RxTests` for all operator tests, located in the AllTests-* target inside the project `Rx.xcworkspace`.
 
 This is an example of a typical `RxSwift` operator unit test:
 
@@ -12,16 +12,16 @@ func testMap_Range() {
         // Initializes test scheduler.
         // Test scheduler implements virtual time that is
         // detached from local machine clock.
-        // That enables running the simulation as fast as possible
+        // This enables running the simulation as fast as possible
         // and proving that all events have been handled.
         let scheduler = TestScheduler(initialClock: 0)
 
         // Creates a mock hot observable sequence.
-        // The sequence will emit events at following
-        // times no matter is there some observer subscribed.
+        // The sequence will emit events at desginated
+        // times, no matter if there are observers subscribed or not.
         // (that's what hot means).
         // This observable sequence will also record all subscriptions
-        // made during it's lifetime (`subscriptions` property).
+        // made during its lifetime (`subscriptions` property).
         let xs = scheduler.createHotObservable([
             next(150, 1),  // first argument is virtual time, second argument is element value
             next(210, 0),
@@ -32,10 +32,10 @@ func testMap_Range() {
             ])
 
         // `start` method will by default:
-        // * run the simulation and record all events
+        // * Run the simulation and record all events
         //   using observer referenced by `res`.
-        // * subscribe at virtual time 200
-        // * dispose subscription at virtual time 1000
+        // * Subscribe at virtual time 200
+        // * Dispose subscription at virtual time 1000
         let res = scheduler.start { xs.map { $0 * 2 } }
 
         let correctMessages = [
@@ -57,9 +57,9 @@ func testMap_Range() {
 
 ## Testing operator compositions (view models, components)
 
-Examples how to test operator compositions are contained inside `Rx.xcworkspace` > `RxExample-iOSTests` target.
+Examples of how to test operator compositions are contained inside `Rx.xcworkspace` > `RxExample-iOSTests` target.
 
-It easy to define `RxTests` extensions so you can write your tests in a readable way. Provided examples inside `RxExample-iOSTests` are just a tip how you can write those extensions, but there is a lot of possibilities how to write those tests.
+It's easy to define `RxTests` extensions so you can write your tests in a readable way. Provided examples inside `RxExample-iOSTests` are just suggestions on how you can write those extensions, but there are a lot of possibilities on how to write those tests.
 
 ```swift
     // expected events and test data

Documentation/Units.md

@@ -1,58 +1,58 @@
 Units
 =====
 
-This document will try to describe what units are, why they are a useful concept, how to use and create them.
+This document will try to describe what units are, why they are a useful concept, and how to use and create them.
 
 * [Why](#why)
-* [How do they work](#how-do-they-work)
-* [Why are they named Units](#why-are-they-named-units)
+* [How they work](#how-they-work)
+* [Why they are named Units](#why-they-are-named-units)
 * [RxCocoa units](#rxcocoa-units)
 * [Driver unit](#driver-unit)
-    * [Why was it named Driver](#why-was-it-named-driver)
+    * [Why it's named Driver](#why-its-named-driver)
     * [Practical usage example](#practical-usage-example)
 
 ## Why
 
 Swift has a powerful type system that can be used to improve correctness and stability of applications and make using Rx a more intuitive and straightforward experience.
 
-**Units are so far specific only to the [RxCocoa](https://github.com/ReactiveX/RxSwift/tree/master/RxCocoa) project, but the same principles could be implemented easily in other Rx implementations if necessary. There is no private API magic needed.**
+**Units are specific only to the [RxCocoa](https://github.com/ReactiveX/RxSwift/tree/master/RxCocoa) project. However, the same principles could easily be implemented in other Rx implementations, if necessary. There is no private API magic needed.**
 
-**Units are totally optional, you can use raw observable sequences everywhere in your program and all RxCocoa APIs work with observable sequences.**
+**Units are totally optional. You can use raw observable sequences everywhere in your program and all RxCocoa APIs work with observable sequences.**
 
 Units also help communicate and ensure observable sequence properties across interface boundaries.
 
 Here are some of the properties that are important when writing Cocoa/UIKit applications.
 
-* can't error out
-* observe on main scheduler
-* subscribe on main scheduler
-* sharing side effects
+* Can't error out
+* Observe on main scheduler
+* Subscribe on main scheduler
+* Sharing side effects
 
-## How do they work
+## How they work
 
-In its core it's just a struct with a reference to observable sequence.
+At its core, it's just a struct with a reference to observable sequence.
 
-You can think of them as a kind of builder pattern for observable sequences. When sequence is built, calling `.asObservable()` will transform a unit into a vanilla observable sequence.
+You can think of them as a kind of builder pattern for observable sequences. When a sequence is built, calling `.asObservable()` will transform a unit into a vanilla observable sequence.
 
-## Why are they named Units
+## Why they are named Units
 
-Analogies help reason about unfamiliar concepts, here are some ideas how units in physics and RxCocoa (rx units) are similar.
+Using a couple analogies will help us reason about unfamiliar concepts. Here are some analogies showing how units in physics and RxCocoa (Rx units) are similar.
 
 Analogies:
 
 | Physical units                      | Rx units                                                            |
 |-------------------------------------|---------------------------------------------------------------------|
 | number (one value)                  | observable sequence (sequence of values)                            |
-| dimensional unit (m, s, m/s, N ...) | Swift struct (Driver, ControlProperty, ControlEvent, Variable, ...) |
+| dimensional unit (m, s, m/s, N ...) | Swift struct (Driver, ControlProperty, ControlEvent, ...) |
 
-Physical unit is a pair of a number and a corresponding dimensional unit.<br/>
-Rx unit is a pair of an observable sequence and a corresponding struct that describes observable sequence properties.
+A physical unit is a pair of a number and a corresponding dimensional unit.<br/>
+An Rx unit is a pair of an observable sequence and a corresponding struct that describes observable sequence properties.
 
-Numbers are the basic composition glue when working with physical units: usually real or complex numbers.<br/>
-Observable sequences are the basic composition glue when working with rx units.
+Numbers are the basic compositional glue when working with physical units: usually real or complex numbers.<br/>
+Observable sequences are the basic compositional glue when working with Rx units.
 
-Physical units and [dimensional analysis](https://en.wikipedia.org/wiki/Dimensional_analysis#Checking_equations_that_involve_dimensions) can alleviate certain class of errors during complex calculations.<br/>
-Type checking rx units can alleviate certain class of logic errors when writing reactive programs.
+Physical units and [dimensional analysis](https://en.wikipedia.org/wiki/Dimensional_analysis#Checking_equations_that_involve_dimensions) can alleviate certain classes of errors during complex calculations.<br/>
+Type checking Rx units can alleviate certain classes of logic errors when writing reactive programs.
 
 Numbers have operators: `+`, `-`, `*`, `/`.<br/>
 Observable sequences also have operators: `map`, `filter`, `flatMap` ...
@@ -62,25 +62,25 @@ Physics units define operations by using corresponding number operations. E.g.
 `/` operation on physical units is defined using `/` operation on numbers.
 
 11 m / 0.5 s = ...
-* first convert unit to **numbers** and **apply** `/` **operator** `11 / 0.5 = 22`
-* then calculate unit (m / s)
-* combine the result = 22 m / s
+* First, convert the unit to **numbers** and **apply** `/` **operator** `11 / 0.5 = 22`
+* Then, calculate the unit (m / s)
+* Lastly, combine the result = 22 m / s
 
 Rx units define operations by using corresponding observable sequence operations (this is how operators work internally). E.g.
 
 The `map` operation on `Driver` is defined using the `map` operation on its observable sequence.
 
 ```swift
-let d: Driver<Int> = Drive.just(11)
+let d: Driver<Int> = Driver.just(11)
 driver.map { $0 / 0.5 } = ...
 ```
 
-* first convert driver to **observable sequence** and **apply** `map` **operator**
+* First, convert `Driver` to **observable sequence** and **apply** `map` **operator**
 ```swift
 let mapped = driver.asObservable().map { $0 / 0.5 } // this `map` is defined on observable sequence
 ```
 
-* then combine that to get the unit value
+* Then, combine that to get the unit value
 ```swift
 let result = Driver(mapped)
 ```
@@ -88,10 +88,10 @@ let result = Driver(mapped)
 There is a set of basic units in physics [(`m`, `kg`, `s`, `A`, `K`, `cd`, `mol`)](https://en.wikipedia.org/wiki/SI_base_unit) that is orthogonal.<br/>
 There is a set of basic interesting properties for observable sequences in `RxCocoa` that is orthogonal.
 
-    * can't error out
-    * observe on main scheduler
-    * subscribe on main scheduler
-    * sharing side effects
+    * Can't error out
+    * Observe on main scheduler
+    * Subscribe on main scheduler
+    * Sharing side effects
 
 Derived units in physics sometimes have special names.<br/>
 E.g.
@@ -106,19 +106,18 @@ E.g.
 ```
 Driver = (can't error out) * (observe on main scheduler) * (sharing side effects)
 ControlProperty = (sharing side effects) * (subscribe on main scheduler)
-Variable = (can't error out) * (sharing side effects)
 ```
 
-Conversion between different units in physics is done with a help of operators defined on numbers `*`, `/`.<br/>
-Conversion between different rx units in done with a help of observable sequence operators.
+Conversion between different units in physics is done with the help of operators defined on numbers `*`, `/`.<br/>
+Conversion between different Rx units in done with the help of observable sequence operators.
 
 E.g.
 
 ```
-can't error out = catchError
-observe on main scheduler = observeOn(MainScheduler.instance)
-subscribe on main scheduler = subscribeOn(MainScheduler.instance)
-sharing side effects = share* (one of the `share` operators)
+Can't error out = catchError
+Observe on main scheduler = observeOn(MainScheduler.instance)
+Subscribe on main scheduler = subscribeOn(MainScheduler.instance)
+Sharing side effects = share* (one of the `share` operators)
 ```
 
 
@@ -126,29 +125,24 @@ sharing side effects = share* (one of the `share` operators)
 
 ### Driver unit
 
-* can't error out
-* observe on main scheduler
-* sharing side effects (`shareReplayLatestWhileConnected`)
+* Can't error out
+* Observe on main scheduler
+* Sharing side effects (`shareReplayLatestWhileConnected`)
 
 ### ControlProperty / ControlEvent
 
-* can't error out
-* subscribe on main scheduler
-* observe on main scheduler
-* sharing side effects
-
-### Variable
-
-* can't error out
-* sharing side effects
+* Can't error out
+* Subscribe on main scheduler
+* Observe on main scheduler
+* Sharing side effects
 
 ## Driver
 
-This is the most elaborate unit. It's intention is to provide an intuitive way to write reactive code in UI layer.
+This is the most elaborate unit. Its intention is to provide an intuitive way to write reactive code in the UI layer.
 
-### Why was it named Driver
+### Why it's named Driver
 
-It's intended use case was to model sequences that drive your application.
+Its intended use case was to model sequences that drive your application.
 
 E.g.
 * Drive UI from CoreData model
@@ -156,9 +150,9 @@ E.g.
 ...
 
 
-Like normal operating system drivers, in case one of those sequence errors out your application will stop responding to user input.
+Like normal operating system drivers, in case a sequence errors out, your application will stop responding to user input.
 
-It is also extremely important that those elements are observed on main thread because UI elements and application logic are usually not thread safe.
+It is also extremely important that those elements are observed on the main thread because UI elements and application logic are usually not thread safe.
 
 Also, `Driver` unit builds an observable sequence that shares side effects.
 
@@ -167,10 +161,10 @@ E.g.
 
 ### Practical usage example
 
-This is an typical beginner example.
+This is a typical beginner example.
 
 ```swift
-let results = query.rx_text
+let results = query.rx.text
     .throttle(0.3, scheduler: MainScheduler.instance)
     .flatMapLatest { query in
         fetchAutoCompleteItems(query)
@@ -178,46 +172,46 @@ let results = query.rx_text
 
 results
     .map { "\($0.count)" }
-    .bindTo(resultCount.rx_text)
+    .bindTo(resultCount.rx.text)
     .addDisposableTo(disposeBag)
 
 results
-    .bindTo(resultsTableView.rx_itemsWithCellIdentifier("Cell")) { (_, result, cell) in
+    .bindTo(resultsTableView.rx.itemsWithCellIdentifier("Cell")) { (_, result, cell) in
         cell.textLabel?.text = "\(result)"
     }
     .addDisposableTo(disposeBag)
 ```
 
 The intended behavior of this code was to:
-* throttle user input
-* contact server and fetch a list of user results (once per query)
-* then bind the results to two UI elements, results table view and a label that displays number of results
+* Throttle user input
+* Contact server and fetch a list of user results (once per query)
+* Bind the results to two UI elements: results table view and a label that displays the number of results
 
-So what are the problems with this code:
-* in case the `fetchAutoCompleteItems` observable sequence errors out (connection failed, or parsing error), this error would unbind everything and UI wouldn't respond any more to new queries.
-* in case `fetchAutoCompleteItems` returns results on some background thread, results would be bound to UI elements from a background thread and that could cause non deterministic crashes.
-* results are bound to two UI elements, which means that for each user query two HTTP requests would be made, one for each UI element, which is not intended behavior.
+So, what are the problems with this code?:
+* If the `fetchAutoCompleteItems` observable sequence errors out (connection failed or parsing error), this error would unbind everything and the UI wouldn't respond any more to new queries.
+* If `fetchAutoCompleteItems` returns results on some background thread, results would be bound to UI elements from a background thread which could cause non-deterministic crashes.
+* Results are bound to two UI elements, which means that for each user query, two HTTP requests would be made, one for each UI element, which is not the intended behavior.
 
 A more appropriate version of the code would look like this:
 
 ```swift
-let results = query.rx_text
+let results = query.rx.text
     .throttle(0.3, scheduler: MainScheduler.instance)
     .flatMapLatest { query in
         fetchAutoCompleteItems(query)
-            .observeOn(MainScheduler.instance) // results are returned on MainScheduler
-            .catchErrorJustReturn([])                // in worst case, errors are handled
+            .observeOn(MainScheduler.instance)  // results are returned on MainScheduler
+            .catchErrorJustReturn([])           // in the worst case, errors are handled
     }
-    .shareReplay(1)                                  // HTTP requests are shared and results replayed
-                                                     // to all UI elements
+    .shareReplay(1)                             // HTTP requests are shared and results replayed
+                                                // to all UI elements
 
 results
     .map { "\($0.count)" }
-    .bindTo(resultCount.rx_text)
+    .bindTo(resultCount.rx.text)
     .addDisposableTo(disposeBag)
 
 results
-    .bindTo(resultTableView.rx_itemsWithCellIdentifier("Cell")) { (_, result, cell) in
+    .bindTo(resultTableView.rx.itemsWithCellIdentifier("Cell")) { (_, result, cell) in
         cell.textLabel?.text = "\(result)"
     }
     .addDisposableTo(disposeBag)
@@ -228,20 +222,20 @@ Making sure all of these requirements are properly handled in large systems can
 The following code looks almost the same:
 
 ```swift
-let results = query.rx_text.asDriver()        // This converts normal sequence into `Driver` sequence.
+let results = query.rx.text.asDriver()        // This converts a normal sequence into a `Driver` sequence.
     .throttle(0.3, scheduler: MainScheduler.instance)
     .flatMapLatest { query in
         fetchAutoCompleteItems(query)
-            .asDriver(onErrorJustReturn: [])  // Builder just needs info what to return in case of error.
+            .asDriver(onErrorJustReturn: [])  // Builder just needs info about what to return in case of error.
     }
 
 results
     .map { "\($0.count)" }
-    .drive(resultCount.rx_text)               // If there is `drive` method available instead of `bindTo`,
-    .addDisposableTo(disposeBag)              // that means that compiler has proved all properties
+    .drive(resultCount.rx.text)               // If there is a `drive` method available instead of `bindTo`,
+    .addDisposableTo(disposeBag)              // that means that the compiler has proven that all properties
                                               // are satisfied.
 results
-    .drive(resultTableView.rx_itemsWithCellIdentifier("Cell")) { (_, result, cell) in
+    .drive(resultTableView.rx.itemsWithCellIdentifier("Cell")) { (_, result, cell) in
         cell.textLabel?.text = "\(result)"
     }
     .addDisposableTo(disposeBag)
@@ -249,37 +243,37 @@ results
 
 So what is happening here?
 
-This first `asDriver` method converts `ControlProperty` unit to `Driver` unit.
+This first `asDriver` method converts the `ControlProperty` unit to a `Driver` unit.
 
 ```swift
-query.rx_text.asDriver()
+query.rx.text.asDriver()
 ```
 
-Notice that there wasn't anything special that needed to be done. `Driver` has all of the properties of the `ControlProperty` unit plus some more. The underlying observable sequence is just wrapped as `Driver` unit, and that's it.
+Notice that there wasn't anything special that needed to be done. `Driver` has all of the properties of the `ControlProperty` unit, plus some more. The underlying observable sequence is just wrapped as a `Driver` unit, and that's it.
 
-The second change is
+The second change is:
 
 ```swift
-  .asDriver(onErrorJustReturn: [])
+.asDriver(onErrorJustReturn: [])
 ```
 
-Any observable sequence can be converted to `Driver` unit, it just needs to satisfy 3 properties:
-* can't error out
-* observe on main scheduler
-* sharing side effects (`shareReplayLatestWhileConnected`)
+Any observable sequence can be converted to `Driver` unit, as long as it satisfies 3 properties:
+* Can't error out
+* Observe on main scheduler
+* Sharing side effects (`shareReplayLatestWhileConnected`)
 
-So how to make sure those properties are satisfied? Just use normal Rx operators. `asDriver(onErrorJustReturn: [])` is equivalent to following code.
+So how do you make sure those properties are satisfied? Just use normal Rx operators. `asDriver(onErrorJustReturn: [])` is equivalent to following code.
 
 ```
 let safeSequence = xs
-  .observeOn(MainScheduler.instance) // observe events on main scheduler
+  .observeOn(MainScheduler.instance)       // observe events on main scheduler
   .catchErrorJustReturn(onErrorJustReturn) // can't error out
   .shareReplayLatestWhileConnected         // side effects sharing
 return Driver(raw: safeSequence)           // wrap it up
 ```
 
-The final piece is `drive` instead of using `bindTo`.
+The final piece is using `drive` instead of using `bindTo`.
 
-`drive` is defined only on `Driver` unit. It means that if you see `drive` somewhere in code, observable sequence that can never error out and observes elements on main thread is being bound to UI element. Which is exactly what is wanted.
+`drive` is defined only on the `Driver` unit. This means that if you see `drive` somewhere in code, that observable sequence can never error out and it observes on the main thread, which is safe for binding to a UI element.
 
-Theoretically, somebody could define `drive` method to work on `ObservableType` or some other interface, so creating a temporary definition with `let results: Driver<[Results]> = ...` before binding to UI elements would be necessary for complete proof, but we'll leave it up for reader to decide whether that is a realistic scenario.
+Note however that, theoretically, someone could still define a `drive` method to work on `ObservableType` or some other interface, so to be extra safe, creating a temporary definition with `let results: Driver<[Results]> = ...` before binding to UI elements would be necessary for complete proof. However, we'll leave it up to the reader to decide whether this is a realistic scenario or not.

Documentation/Warnings.md

@@ -5,7 +5,7 @@ Warnings
 
 The following is valid for the `subscribe*`, `bind*` and `drive*` family of functions that return `Disposable`.
 
-Warning is probably presented in a context similar to this one:
+You will receive a warning for doing something such as this:
 
 ```Swift
 let xs: Observable<E> ....
@@ -18,10 +18,10 @@ xs
     ...
   }, onError: {
     ...
-  })  
+  })
 ```
 
-The `subscribe` function returns a subscription `Disposable` that can be used to cancel computation and free resources.
+The `subscribe` function returns a subscription `Disposable` that can be used to cancel computation and free resources.  However, not using it (and thus not disposing it) will result in an error.
 
 The preferred way of terminating these fluent calls is by using a `DisposeBag`, either through chaining a call to `.addDisposableTo(disposeBag)` or by adding the disposable directly to the bag.
 
@@ -41,11 +41,11 @@ xs
   .addDisposableTo(disposeBag) // <--- note `addDisposableTo`
 ```
 
-When `disposeBag` gets deallocated, the disposables contained in it will be automatically disposed.
+When `disposeBag` gets deallocated, the disposables contained within it will be automatically disposed as well.
 
 In the case where `xs` terminates in a predictable way with either a `Completed` or `Error` message, not handling the subscription `Disposable` won't leak any resources. However, even in this case, using a dispose bag is still the preferred way to handle subscription disposables. It ensures that element computation is always terminated at a predictable moment, and makes your code robust and future proof because resources will be properly disposed even if the implementation of `xs` changes.
 
-Another way to make sure subscriptions and resources are tied with the lifetime of some object is by using the `takeUntil` operator.
+Another way to make sure subscriptions and resources are tied to the lifetime of some object is by using the `takeUntil` operator.
 
 ```Swift
 let xs: Observable<E> ....
@@ -55,7 +55,7 @@ _ = xs
   .filter { ... }
   .map { ... }
   .switchLatest()
-  .takeUntil(someObject.rx_deallocated) // <-- note the `takeUntil` operator
+  .takeUntil(someObject.deallocated) // <-- note the `takeUntil` operator
   .subscribe(onNext: {
     ...
   }, onError: {
@@ -63,7 +63,7 @@ _ = xs
   })
 ```
 
-If ignoring the subscription `Disposable` is desired behavior, this is how to silence the compiler warning.
+If ignoring the subscription `Disposable` is the desired behavior, this is how to silence the compiler warning.
 
 ```Swift
 let xs: Observable<E> ....
@@ -81,7 +81,7 @@ _ = xs // <-- note the underscore
 
 ### <a name="unused-observable"></a>Unused observable sequence (unused-observable)
 
-Warning is probably presented in a context similar to this one:
+You will receive a warning for doing something such as this:
 
 ```Swift
 let xs: Observable<E> ....
@@ -105,7 +105,7 @@ let ys = xs // <--- names definition as `ys`
   .map { ... }
 ```
 
-... or start computation based on that definition  
+... or start computation based on that definition
 
 ```Swift
 let xs: Observable<E> ....
@@ -114,9 +114,9 @@ let disposeBag = DisposeBag()
 xs
   .filter { ... }
   .map { ... }
-  .subscribeNext { nextElement in       // <-- note the `subscribe*` method
+  .subscribe(onNext: { nextElement in  // <-- note the `subscribe*` method
     // use the element
     print(nextElement)
-  }
+  })
   .addDisposableTo(disposeBag)
 ```

Documentation/Why.md

@@ -6,40 +6,40 @@
 
 ```swift
 Observable.combineLatest(firstName.rx_text, lastName.rx_text) { $0 + " " + $1 }
-            .map { "Greeting \($0)" }
-            .bindTo(greetingLabel.rx_text)
+    .map { "Greetings, \($0)" }
+    .bindTo(greetingLabel.rx_text)
 ```
 
 This also works with `UITableView`s and `UICollectionView`s.
 
 ```swift
 viewModel
-  .rows
-  .bindTo(resultsTableView.rx_itemsWithCellIdentifier("WikipediaSearchCell", cellType: WikipediaSearchCell.self)) { (_, viewModel, cell) in
-    cell.title = viewModel.title
-    cell.url = viewModel.url
-  }
-  .addDisposableTo(disposeBag)
+    .rows
+    .bindTo(resultsTableView.rx_itemsWithCellIdentifier("WikipediaSearchCell", cellType: WikipediaSearchCell.self)) { (_, viewModel, cell) in
+        cell.title = viewModel.title
+        cell.url = viewModel.url
+    }
+    .addDisposableTo(disposeBag)
 ```
 
-** Official suggestion is to always use `.addDisposableTo(disposeBag)` even though that's not necessary for simple bindings.**
+**Official suggestion is to always use `.addDisposableTo(disposeBag)` even though that's not necessary for simple bindings.**
 
 ### Retries
 
-It would be great if APIs wouldn't fail, but unfortunately they do. Let's say there is an API method
+It would be great if APIs wouldn't fail, but unfortunately they do. Let's say there is an API method:
 
 ```swift
 func doSomethingIncredible(forWho: String) throws -> IncredibleThing
 ```
 
-If you are using this function as it is, it's really hard to do retries in case it fails. Not to mention complexities modeling [exponential backoffs](https://en.wikipedia.org/wiki/Exponential_backoff). Sure it's possible, but code would probably contain a lot of transient states that you really don't care about, and it won't be reusable.
+If you are using this function as it is, it's really hard to do retries in case it fails. Not to mention complexities modeling [exponential backoffs](https://en.wikipedia.org/wiki/Exponential_backoff). Sure it's possible, but the code would probably contain a lot of transient states that you really don't care about, and it wouldn't be reusable.
 
-You would ideally want to capture the essence of retrying, and to be able to apply it to any operation.
+Ideally, you would want to capture the essence of retrying, and to be able to apply it to any operation.
 
 This is how you can do simple retries with Rx
 
 ```swift
-  doSomethingIncredible("me")
+doSomethingIncredible("me")
     .retry(3)
 ```
 
@@ -47,11 +47,11 @@ You can also easily create custom retry operators.
 
 ### Delegates
 
-Instead of doing the tedious and non-expressive
+Instead of doing the tedious and non-expressive:
 
 ```swift
-public func scrollViewDidScroll(scrollView: UIScrollView) { // what scroll view is this bound to?
-    self.leftPositionConstraint.constant = scrollView.contentOffset.x
+public func scrollViewDidScroll(scrollView: UIScrollView) { [weak self] // what scroll view is this bound to?
+    self?.leftPositionConstraint.constant = scrollView.contentOffset.x
 }
 ```
 
@@ -59,14 +59,14 @@ public func scrollViewDidScroll(scrollView: UIScrollView) { // what scroll view
 
 ```swift
 self.resultsTableView
-  .rx_contentOffset
-  .map { $0.x }
-  .bindTo(self.leftPositionConstraint.rx_constant)
+    .rx_contentOffset
+    .map { $0.x }
+    .bindTo(self.leftPositionConstraint.rx_constant)
 ```
 
 ### KVO
 
-Instead of
+Instead of:
 
 ```
 `TickTock` was deallocated while key value observers were still registered with it. Observation info was leaked, and may even become mistakenly attached to some other object.
@@ -104,37 +104,38 @@ someSuspiciousViewController
 
 ### Notifications
 
-Instead of using
+Instead of using:
+
 ```swift
-    @available(iOS 4.0, *)
-    public func addObserverForName(name: String?, object obj: AnyObject?, queue: NSOperationQueue?, usingBlock block: (NSNotification) -> Void) -> NSObjectProtocol
+@available(iOS 4.0, *)
+public func addObserverForName(name: String?, object obj: AnyObject?, queue: NSOperationQueue?, usingBlock block: (NSNotification) -> Void) -> NSObjectProtocol
 ```
 
 ... just write
 
 ```swift
-    NSNotificationCenter.defaultCenter()
-      .rx_notification(UITextViewTextDidBeginEditingNotification, object: myTextView)
-      .map { /*do something with data*/ }
-      ....
+NSNotificationCenter.defaultCenter()
+    .rx_notification(UITextViewTextDidBeginEditingNotification, object: myTextView)
+    .map { /*do something with data*/ }
+    ....
 ```
 
 ### Transient state
 
-There is also a lot of problems with transient state when writing async programs. Typical example is autocomplete search box.
+There are also a lot of problems with transient state when writing async programs. A typical example is an autocomplete search box.
 
-If you were to write the autocomplete code without Rx, first problem that probably needs to be solved is when `c` in `abc` is typed, and there is a pending request for `ab`, pending request gets cancelled. Ok, that shouldn't be too hard to solve, you just create additional variable to hold reference to pending request.
+If you were to write the autocomplete code without Rx, the first problem that probably needs to be solved is when `c` in `abc` is typed, and there is a pending request for `ab`, the pending request gets cancelled. OK, that shouldn't be too hard to solve, you just create an additional variable to hold reference to the pending request.
 
-The next problem is if the request fails, you need to do that messy retry logic. But ok, a couple of more fields that capture number of retries that need to be cleaned up.
+The next problem is if the request fails, you need to do that messy retry logic. But OK, a couple more fields that capture the number of retries that need to be cleaned up.
 
-It would be great if program would wait for some time before firing that request to server, after all, we don't want to spam our servers in case somebody is in the process of fast typing something very long. Additional timer field maybe?
+It would be great if the program would wait for some time before firing a request to the server. After all, we don't want to spam our servers in case somebody is in the process of typing something very long. An additional timer field maybe?
 
 There is also a question of what needs to be shown on screen while that search is executing, and also what needs to be shown in case we fail even with all of the retries.
 
 Writing all of this and properly testing it would be tedious. This is that same logic written with Rx.
 
 ```swift
-  searchTextField.rx_text
+searchTextField.rx_text
     .throttle(0.3, scheduler: MainScheduler.instance)
     .distinctUntilChanged()
     .flatMapLatest { query in
@@ -148,22 +149,22 @@ Writing all of this and properly testing it would be tedious. This is that same
     }
 ```
 
-There is no additional flags or fields required. Rx takes care of all that transient mess.
+There are no additional flags or fields required. Rx takes care of all that transient mess.
 
 ### Compositional disposal
 
-Lets assume that there is a scenario where you want to display blurred images in a table view. The images should be first fetched from URL, then decoded and then blurred.
+Let's assume that there is a scenario where you want to display blurred images in a table view. First, the images should be fetched from a URL, then decoded and then blurred.
 
-It would also be nice if that entire process could be cancelled if a cell exits the visible table view area because bandwidth and processor time for blurring are expensive.
+It would also be nice if that entire process could be cancelled if a cell exits the visible table view area since bandwidth and processor time for blurring are expensive.
 
-It would also be nice if we didn't just immediately start to fetch image once the cell enters visible area because if user swipes really fast there could be a lot of requests fired and cancelled.
+It would also be nice if we didn't just immediately start to fetch an image once the cell enters the visible area since, if user swipes really fast, there could be a lot of requests fired and cancelled.
 
-It would be also nice if we could limit the number of concurrent image operations because blurring images is an expensive operation.
+It would be also nice if we could limit the number of concurrent image operations because, again, blurring images is an expensive operation.
 
-This is how we can do it using Rx.
+This is how we can do it using Rx:
 
 ```swift
-// this is conceptual solution
+// this is a conceptual solution
 let imageSubscription = imageURLs
     .throttle(0.2, scheduler: MainScheduler.instance)
     .flatMapLatest { imageURL in
@@ -180,39 +181,39 @@ let imageSubscription = imageURLs
     .addDisposableTo(reuseDisposeBag)
 ```
 
-This code will do all that, and when `imageSubscription` is disposed it will cancel all dependent async operations and make sure no rogue image is bound to UI.
+This code will do all that and, when `imageSubscription` is disposed, it will cancel all dependent async operations and make sure no rogue image is bound to the UI.
 
 ### Aggregating network requests
 
-What if you need to fire two requests, and aggregate results when they have both finished?
+What if you need to fire two requests and aggregate results when they have both finished?
 
-Well, there is of course `zip` operator
+Well, there is of course the `zip` operator
 
 ```swift
-  let userRequest: Observable<User> = API.getUser("me")
-  let friendsRequest: Observable<Friends> = API.getFriends("me")
+let userRequest: Observable<User> = API.getUser("me")
+let friendsRequest: Observable<Friends> = API.getFriends("me")
 
-  Observable.zip(userRequest, friendsRequest) { user, friends in
-      return (user, friends)
-    }
-    .subscribeNext { user, friends in
-        // bind them to user interface
-    }
+Observable.zip(userRequest, friendsRequest) { user, friends in
+    return (user, friends)
+}
+.subscribeNext { user, friends in
+    // bind them to the user interface
+}
 ```
 
-So what if those APIs return results on a background thread, and binding has to happen on main UI thread? There is `observeOn`.
+So what if those APIs return results on a background thread, and binding has to happen on the main UI thread? There is `observeOn`.
 
 ```swift
-  let userRequest: Observable<User> = API.getUser("me")
-  let friendsRequest: Observable<[Friend]> = API.getFriends("me")
+let userRequest: Observable<User> = API.getUser("me")
+let friendsRequest: Observable<[Friend]> = API.getFriends("me")
 
-  Observable.zip(userRequest, friendsRequest) { user, friends in
-      return (user, friends)
-    }
-    .observeOn(MainScheduler.instance)
-    .subscribeNext { user, friends in
-        // bind them to user interface
-    }
+Observable.zip(userRequest, friendsRequest) { user, friends in
+    return (user, friends)
+}
+.observeOn(MainScheduler.instance)
+.subscribeNext { user, friends in
+    // bind them to the user interface
+}
 ```
 
 There are many more practical use cases where Rx really shines.
@@ -221,19 +222,19 @@ There are many more practical use cases where Rx really shines.
 
 Languages that allow mutation make it easy to access global state and mutate it. Uncontrolled mutations of shared global state can easily cause [combinatorial explosion] (https://en.wikipedia.org/wiki/Combinatorial_explosion#Computing).
 
-But on the other hand, when used in smart way, imperative languages can enable writing more efficient code closer to hardware.
+But on the other hand, when used in a smart way, imperative languages can enable writing more efficient code closer to hardware.
 
 The usual way to battle combinatorial explosion is to keep state as simple as possible, and use [unidirectional data flows](https://developer.apple.com/videos/play/wwdc2014-229) to model derived data.
 
-This is what Rx really shines at.
+This is where Rx really shines.
 
-Rx is that sweet spot between functional and imperative world. It enables you to use immutable definitions and pure functions to process snapshots of mutable state in a reliable composable way.
+Rx is that sweet spot between functional and imperative worlds. It enables you to use immutable definitions and pure functions to process snapshots of mutable state in a reliable composable way.
 
-So what are some of the practical examples?
+So what are some practical examples?
 
 ### Easy integration
 
-And what if you need to create your own observable? It's pretty easy. This code is taken from RxCocoa and that's all you need to wrap HTTP requests with `NSURLSession`
+What if you need to create your own observable? It's pretty easy. This code is taken from RxCocoa and that's all you need to wrap HTTP requests with `NSURLSession`
 
 ```swift
 extension NSURLSession {
@@ -266,30 +267,30 @@ extension NSURLSession {
 
 ### Benefits
 
-In short using Rx will make your code:
+In short, using Rx will make your code:
 
-* composable <- because Rx is composition's nick name
-* reusable <- because it's composable
-* declarative <- because definitions are immutable and only data changes
-* understandable and concise <- raising level of abstraction and removing transient states
-* stable <- because Rx code is thoroughly unit tested
-* less stateful <- because you are modeling application as unidirectional data flows
-* without leaks <- because resource management is easy
+* Composable <- Because Rx is composition's nickname
+* Reusable <- Because it's composable
+* Declarative <- Because definitions are immutable and only data changes
+* Understandable and concise <- Raising the level of abstraction and removing transient states
+* Stable <- Because Rx code is thoroughly unit tested
+* Less stateful <- Because you are modeling applications as unidirectional data flows
+* Without leaks <- Because resource management is easy
 
 ### It's not all or nothing
 
 It is usually a good idea to model as much of your application as possible using Rx.
 
-But what if you don't know all of the operators and does there even exist some operator that models your particular case?
+But what if you don't know all of the operators and whether or not there even exists some operator that models your particular case?
 
 Well, all of the Rx operators are based on math and should be intuitive.
 
-The good news is that about 10-15 operators cover most typical use cases. And that list already includes some of the familiar ones like `map`, `filter`, `zip`, `observeOn` ...
+The good news is that about 10-15 operators cover most typical use cases. And that list already includes some of the familiar ones like `map`, `filter`, `zip`, `observeOn`, ...
 
 There is a huge list of [all Rx operators](http://reactivex.io/documentation/operators.html) and list of all of the [currently supported RxSwift operators](API.md).
 
-For each operator there is [marble diagram](http://reactivex.io/documentation/operators/retry.html) that helps to explain how does it work.
+For each operator, there is a [marble diagram](http://reactivex.io/documentation/operators/retry.html) that helps to explain how it works.
 
 But what if you need some operator that isn't on that list? Well, you can make your own operator.
 
-What if creating that kind of operator is really hard for some reason, or you have some legacy stateful piece of code that you need to work with? Well, you've got yourself in a mess, but you can [jump out of Rx monad](GettingStarted.md#life-happens) easily, process the data, and return back into it.
+What if creating that kind of operator is really hard for some reason, or you have some legacy stateful piece of code that you need to work with? Well, you've got yourself in a mess, but you can [jump out of Rx monads](GettingStarted.md#life-happens) easily, process the data, and return back into it.

Gemfile

@@ -0,0 +1,3 @@
+source 'https://rubygems.org'
+
+gem 'danger'

Gemfile.lock

@@ -0,0 +1,34 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.3.8)
+    claide (1.0.0)
+    colored (1.2)
+    danger (0.7.4)
+      claide
+      colored (~> 1.2)
+      faraday
+      git
+      octokit (~> 4.2)
+      redcarpet (~> 3.3)
+      terminal-table (~> 1)
+    faraday (0.9.1)
+      multipart-post (>= 1.2, < 3)
+    git (1.3.0)
+    multipart-post (2.0.0)
+    octokit (4.3.0)
+      sawyer (~> 0.7.0, >= 0.5.3)
+    redcarpet (3.3.4)
+    sawyer (0.7.0)
+      addressable (>= 2.3.5, < 2.5)
+      faraday (~> 0.8, < 0.10)
+    terminal-table (1.4.5)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  danger
+
+BUNDLED WITH
+   1.12.5

ISSUE_TEMPLATE.md

@@ -0,0 +1,51 @@
+
+:warning: If you don't have something to report in the following format, it will probably be easier and faster to ask in the [slack channel](http://http://slack.rxswift.org/) first. :warning: 
+
+**Short description of the issue**:
+
+  _description here_
+
+**Self contained code example that reproduces the issue**:
+
+```swift
+  code goes here
+  
+// If we can't get a self contained code example that reproduces the issue, there is a big chance we won't be able
+// to help you because there is not much we can do.
+// `Self contained code example` means:
+// * that we should be able to just run the provided code without changing it.
+// * that it will reproduce the issue upon running
+```
+
+**Xcode version**:
+
+```
+  Xcode version goes here
+```
+
+**Expected outcome**:
+
+  _what you expect to happen goes here_
+
+**What actually happens**:
+
+  _what actually happens goes here_
+
+:warning: Fields below are optional for general issues or in case those questions aren't related to your issue, but filling them out will increase the chances of getting your issue resolved. :warning:
+
+**Installation method**:
+  - [ ] CocoaPods
+  - [ ] Carthage
+  - [ ] Git submodules
+
+**I have multiple versions of Xcode installed**:
+  (so we can know if this is a potential cause of your issue)
+  - [ ] yes (which ones)
+  - [ ] no
+
+**Level of RxSwift knowledge**:
+  (this is so we can understand your level of knowledge
+    and formulate the response in an appropriate manner)
+  - [ ] just starting
+  - [ ] I have a small code base
+  - [ ] I have a significant code base

Package.swift

@@ -3,11 +3,6 @@ import PackageDescription
 #if os(OSX)
 let package = Package(
     name: "RxSwift",
-    exclude: [
-        "Sources/RxCocoa",
-        "Sources/RxTests",
-        "Sources/AllTests"
-    ],
     targets: [
         Target(
             name: "RxSwift"
@@ -32,14 +27,16 @@ let package = Package(
                 .Target(name: "RxTests")
             ]
         )
+    ],
+    exclude: [
+        "Sources/RxCocoa",
+        "Sources/RxTests",
+        "Sources/AllTests"
     ]
 )
 #elseif os(Linux)
 let package = Package(
     name: "RxSwift",
-    exclude: [
-        "Sources/RxCocoa",
-    ],
     targets: [
         Target(
             name: "RxSwift"
@@ -64,6 +61,9 @@ let package = Package(
                 .Target(name: "RxTests")
             ]
         )
+    ],
+    exclude: [
+        "Sources/RxCocoa",
     ]
 )
 #endif

Preprocessor/Preprocessor.xcodeproj/project.pbxproj

@@ -166,6 +166,7 @@
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = macosx;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 3.0;
 			};
 			name = Debug;
 		};
@@ -201,6 +202,7 @@
 				MACOSX_DEPLOYMENT_TARGET = 10.10;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = macosx;
+				SWIFT_VERSION = 3.0;
 			};
 			name = Release;
 		};

Preprocessor/Preprocessor/main.swift

@@ -16,28 +16,29 @@ if Process.argc != 3 {
 let sourceFilesRoot = Process.arguments[1]
 let derivedData = Process.arguments[2]
 
-let fileManager = NSFileManager()
+let fileManager = FileManager()
 
 func escape(value: String) -> String {
-    let escapedString = value.stringByReplacingOccurrencesOfString("\n", withString: "\\n")
-    let escapedString1 = escapedString.stringByReplacingOccurrencesOfString("\r", withString: "\\r")
-    let escapedString2 = escapedString1.stringByReplacingOccurrencesOfString("\"", withString: "\\\"")
+    let escapedString = value.replacingOccurrences(of: "\n", with: "\\n")
+    let escapedString1 = escapedString.replacingOccurrences(of: "\r", with: "\\r")
+    let escapedString2 = escapedString1.replacingOccurrences(of: "\"", with: "\\\"")
     
     return "\"\(escapedString2)\""
 }
 
 func processFile(path: String, outputPath: String) -> String {
-    let rawContent = NSData(contentsOfFile: path)!
-    let content = NSString(data: rawContent, encoding: NSUTF8StringEncoding)! as String
+    let url = URL(fileURLWithPath: path)
+    let rawContent = try! Data(contentsOf: url)
+    let content = String(data: rawContent, encoding: String.Encoding.utf8)
     
-    let components = content.componentsSeparatedByString("<%")
+    guard let components = content?.components(separatedBy: "<%") else { return "" }
     
     var functionContentComponents: [String] = []
     functionContentComponents.append("var components: [String] = [\"// This file is autogenerated. Take a look at `Preprocessor` target in RxSwift project \\n\"]\n")
-    functionContentComponents.append("components.append(\(escape(components[0])))\n")
+    functionContentComponents.append("components.append(\(escape(value: components[0])))\n")
     
     for codePlusSuffix in (components[1 ..< components.count]) {
-        let codePlusSuffixSeparated = codePlusSuffix.componentsSeparatedByString("%>")
+        let codePlusSuffixSeparated = codePlusSuffix.components(separatedBy: "%>")
         if codePlusSuffixSeparated.count != 2 {
             fatalError("Error in \(path) near \(codePlusSuffix)")
         }
@@ -46,24 +47,24 @@ func processFile(path: String, outputPath: String) -> String {
         let suffix = codePlusSuffixSeparated[1]
         
         if code.hasPrefix("=") {
-            functionContentComponents.append("components.append(String(\(code.substringFromIndex(code.startIndex.successor()))))\n")
+            functionContentComponents.append("components.append(String(\(code.substring(from: code.index(after: code.startIndex)))))\n")
         }
         else {
             functionContentComponents.append("\(code)\n")
         }
         
-        functionContentComponents.append("components.append(\(escape(suffix)));\n")
+        functionContentComponents.append("components.append(\(escape(value: suffix)));\n")
     }
     
-    functionContentComponents.append("try! components.joinWithSeparator(\"\").writeToFile(\"\(outputPath)\", atomically: false, encoding: NSUTF8StringEncoding)")
+    functionContentComponents.append("try! components.joined(separator:\"\").write(toFile:\"\(outputPath)\", atomically: false, encoding: String.Encoding.utf8)")
     
-    return functionContentComponents.joinWithSeparator("")
+    return functionContentComponents.joined(separator: "")
 }
 
 func runCommand(path: String) {
-    _ = NSProcessInfo().processIdentifier
+    _ = ProcessInfo().processIdentifier
     
-    let task = NSTask()
+    let task = Task()
     task.launchPath = "/bin/bash"
     task.arguments = ["-c", "xcrun swift \"\(path)\""]
     
@@ -71,34 +72,34 @@ func runCommand(path: String) {
     
     task.waitUntilExit()
     
-    if task.terminationReason != NSTaskTerminationReason.Exit {
+    if task.terminationReason != Task.TerminationReason.exit {
         exit(-1)
     }
 }
 
-let files = fileManager.subpathsAtPath(sourceFilesRoot)
+let files = try fileManager.subpathsOfDirectory(atPath: sourceFilesRoot)
 
 var generateAllFiles = ["// Generated code\n", "import Foundation\n"]
 
-for file in files! {
+for file in files {
     if ((file as NSString).pathExtension ?? "") != "tt" {
         continue
     }
     
     print(file)
     
-    let path = (sourceFilesRoot as NSString).stringByAppendingPathComponent(file as String)
+    let path = (sourceFilesRoot as NSString).appendingPathComponent(file as String)
+    let endIndex = path.index(before: path.index(before: path.index(before: path.endIndex)))
+    let outputPath = path.substring(to: endIndex) + ".swift"
     
-    let outputPath = path.substringToIndex(path.endIndex.predecessor().predecessor().predecessor()) + ".swift"
-    
-    generateAllFiles.append("_ = { () -> Void in\n\(processFile(path, outputPath: outputPath))\n}()\n")
+    generateAllFiles.append("_ = { () -> Void in\n\(processFile(path: path, outputPath: outputPath))\n}()\n")
 }
 
-let script = generateAllFiles.joinWithSeparator("")
-let scriptPath = (derivedData as NSString).stringByAppendingPathComponent("_preprocessor.sh")
+let script = generateAllFiles.joined(separator: "")
+let scriptPath = (derivedData as NSString).appendingPathComponent("_preprocessor.sh")
 
 do {
-    try script.writeToFile(scriptPath, atomically: true, encoding: NSUTF8StringEncoding)
+    try script.write(toFile: scriptPath, atomically: true, encoding: String.Encoding.utf8)
 } catch _ {
 }
-runCommand(scriptPath)
+runCommand(path: scriptPath)

README.md

@@ -3,11 +3,12 @@
 
 [![Travis CI](https://travis-ci.org/ReactiveX/RxSwift.svg?branch=master)](https://travis-ci.org/ReactiveX/RxSwift) ![platforms](https://img.shields.io/badge/platforms-iOS%20%7C%20OSX%20%7C%20tvOS%20%7C%20watchOS%20%7C%20Linux%28experimental%29-333333.svg) ![pod](https://img.shields.io/cocoapods/v/RxSwift.svg) [![Carthage compatible](https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat)](https://github.com/Carthage/Carthage)
 
-
-Xcode 7.3 Swift 2.2 required
-
 ## About Rx
 
+**:warning: This readme describes RxSwift 3.0 version that requires Swift 3.0:warning:**
+
+**:warning: If you are looking for Swift 2.3 compatible version, please take a look at RxSwift ~> 2.0 versions and [swift-2.3](https://github.com/ReactiveX/RxSwift/tree/rxswift-2.0) branch :warning:**
+
 Rx is a [generic abstraction of computation](https://youtu.be/looJcaeboBY) expressed through `Observable<Element>` interface.
 
 This is a Swift version of [Rx](https://github.com/Reactive-Extensions/Rx.NET).
@@ -34,19 +35,20 @@ KVO observing, async operations and streams are all unified under [abstraction o
 * [what are hot and cold observable sequences?](Documentation/HotAndColdObservables.md)
 * [what does the the public API look like?](Documentation/API.md)
 
+
 ###### ... install
 
 * Integrate RxSwift/RxCocoa with my app. [Installation Guide](Documentation/Installation.md)
 
 ###### ... hack around
 
-* with example app. [Running Example App](Documentation/ExampleApp.md)
+* with the example app. [Running Example App](Documentation/ExampleApp.md)
 * with operators in playgrounds. [Playgrounds](Documentation/Playgrounds.md)
 
 ###### ... interact
 
-* All of this is great, but it would be nice to talk with other people using RxSwift and exchange experiences. <br />[![Slack channel](http://slack.rxswift.org/badge.svg)](http://slack.rxswift.org) [Join Slack Channel](http://slack.rxswift.org/)
-* Report a problem using the library. [Open an Issue With Bug Template](Documentation/IssueTemplate.md)
+* All of this is great, but it would be nice to talk with other people using RxSwift and exchange experiences. <br />[![Slack channel](http://rxswift-slack.herokuapp.com/badge.svg)](http://slack.rxswift.org) [Join Slack Channel](http://rxswift-slack.herokuapp.com)
+* Report a problem using the library. [Open an Issue With Bug Template](ISSUE_TEMPLATE.md)
 * Request a new feature. [Open an Issue With Feature Request Template](Documentation/NewFeatureRequestTemplate.md)
 
 
@@ -65,7 +67,131 @@ KVO observing, async operations and streams are all unified under [abstraction o
 * Does this exist for Android? [RxJava](https://github.com/ReactiveX/RxJava)
 * Where is all of this going, what is the future, what about reactive architectures, how do you design entire apps this way? [Cycle.js](https://github.com/cyclejs/cycle-core) - this is javascript, but [RxJS](https://github.com/Reactive-Extensions/RxJS) is javascript version of Rx.
 
-##### References
+## Usage
+
+<table>
+  <tr>
+    <th width="30%">Here's an example</th>
+    <th width="30%">In Action</th>
+  </tr>
+  <tr>
+    <td>Define search for GitHub repositories ...</td>
+    <th rowspan="9"><img src="https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/GithubSearch.gif"></th>
+  </tr>
+  <tr>
+    <td><div class="highlight highlight-source-swift"><pre>
+let searchResults = searchBar.rx.text
+    .throttle(0.3, scheduler: MainScheduler.instance)
+    .distinctUntilChanged()
+    .flatMapLatest { query -> Observable<[Repository]> in
+        if query.isEmpty {
+            return Observable.just([])
+        }
+
+        return searchGitHub(query)
+            .catchErrorJustReturn([])
+    }
+    .observeOn(MainScheduler.instance)</pre></div></td>
+  </tr>
+  <tr>
+    <td>... then bind the results to your tableview</td>
+  </tr>
+  <tr>
+    <td width="30%"><div class="highlight highlight-source-swift"><pre>
+searchResults
+    .bindTo(tableView.rx.items(cellIdentifier: "Cell")) {
+        (index, repository: Repository, cell) in
+        cell.textLabel?.text = repository.name
+        cell.detailTextLabel?.text = repository.url
+    }
+    .addDisposableTo(disposeBag)</pre></div></td>
+  </tr>
+</table>
+
+
+## Requirements
+
+* Xcode 8.0 beta 6 (8S201h)
+* Swift 3.0
+
+* iOS 8.0+
+* Mac OS X 10.10+ 
+* tvOS 9.0+ 
+* watchOS 2.0+
+
+## Installation
+
+Rx doesn't contain any external dependencies.
+
+These are currently the supported options:
+
+### Manual
+
+Open Rx.xcworkspace, choose `RxExample` and hit run. This method will build everything and run the sample app
+
+### [CocoaPods](https://guides.cocoapods.org/using/using-cocoapods.html)
+
+```
+# Podfile
+use_frameworks!
+
+target 'YOUR_TARGET_NAME' do
+    pod 'RxSwift',    '~> 3.0.0.alpha.1'
+    pod 'RxCocoa',    '~> 3.0.0.alpha.1'
+end
+
+# RxTests and RxBlocking make the most sense in the context of unit/integration tests
+target 'YOUR_TESTING_TARGET' do
+    pod 'RxBlocking', '~> 3.0.0.alpha.1'
+    pod 'RxTests',    '~> 3.0.0.alpha.1'
+end
+```
+
+Replace `YOUR_TARGET_NAME` and then, in the `Podfile` directory, type:
+
+**:warning: If you want to use CocoaPods with Xcode 8.0 beta and Swift 3.0, you might need to add the following
+lines to your podfile: :warning:**
+
+```
+post_install do |installer|
+  installer.pods_project.targets.each do |target|
+    target.build_configurations.each do |config|
+      config.build_settings['SWIFT_VERSION'] = '3.0'
+      config.build_settings['MACOSX_DEPLOYMENT_TARGET'] = '10.10'
+    end
+  end
+end
+```
+
+```
+$ pod install
+```
+
+### [Carthage](https://github.com/Carthage/Carthage)
+
+Add this to `Cartfile`
+
+```
+github "ReactiveX/RxSwift" "3.0.0.alpha.1"
+```
+
+```
+$ carthage update
+```
+
+### Manually using git submodules
+
+* Add RxSwift as a submodule
+
+```
+$ git submodule add git@github.com:ReactiveX/RxSwift.git
+```
+
+* Drag `Rx.xcodeproj` into Project Navigator
+* Go to `Project > Targets > Build Phases > Link Binary With Libraries`, click `+` and select `RxSwift-[Platform]` and `RxCocoa-[Platform]` targets
+
+
+## References
 
 * [http://reactivex.io/](http://reactivex.io/)
 * [Reactive Extensions GitHub (GitHub)](https://github.com/Reactive-Extensions)

Rx.playground/Pages/Combining_Observables.xcplaygroundpage/Contents.swift

@@ -1,290 +0,0 @@
-/*:
-> # IMPORTANT: To use `Rx.playground`, please:
-
-1. Open `Rx.xcworkspace`
-2. Build `RxSwift-OSX` scheme
-3. And then open `Rx` playground in `Rx.xcworkspace` tree view.
-4. Choose `View > Show Debug Area`
-*/
-
-//: [<< Previous](@previous) - [Index](Index)
-
-import RxSwift
-
-/*:
-## Combination operators
-
-Operators that work with multiple source Observables to create a single Observable.
-*/
-
-/*:
-
-### `startWith`
-
-emit a specified sequence of items before beginning to emit the items from the source Observable
-
-![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/startwith.png)
-
-[More info in reactive.io website]( http://reactivex.io/documentation/operators/startwith.html )
-*/
-example("startWith") {
-
-    let subscription = Observable.of(4, 5, 6, 7, 8, 9)
-        .startWith(3)
-        .startWith(2)
-        .startWith(1)
-        .startWith(0)
-        .subscribe {
-            print($0)
-        }
-}
-
-
-/*:
-### `combineLatest`
-
-when an item is emitted by either of two Observables, combine the latest item emitted by each Observable via a specified function and emit items based on the results of this function
-
-![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/combinelatest.png)
-
-[More info in reactive.io website]( http://reactivex.io/documentation/operators/combinelatest.html )
-
-*/
-example("combineLatest 1") {
-    let intOb1 = PublishSubject<String>()
-    let intOb2 = PublishSubject<Int>()
-
-    _ = Observable.combineLatest(intOb1, intOb2) {
-        "\($0) \($1)"
-        }
-        .subscribe {
-            print($0)
-        }
-
-    intOb1.on(.Next("A"))
-
-    intOb2.on(.Next(1))
-
-    intOb1.on(.Next("B"))
-
-    intOb2.on(.Next(2))
-}
-
-
-//: To produce output, at least one element has to be received from each sequence in arguements.
-
-example("combineLatest 2") {
-    let intOb1 = Observable.just(2)
-    let intOb2 = Observable.of(0, 1, 2, 3, 4)
-
-    _ = Observable.combineLatest(intOb1, intOb2) {
-            $0 * $1
-        }
-        .subscribe {
-            print($0)
-        }
-}
-
-
-
-//: Combine latest has versions with more than 2 arguments.
-
-example("combineLatest 3") {
-    let intOb1 = Observable.just(2)
-    let intOb2 = Observable.of(0, 1, 2, 3)
-    let intOb3 = Observable.of(0, 1, 2, 3, 4)
-
-    _ = Observable.combineLatest(intOb1, intOb2, intOb3) {
-            ($0 + $1) * $2
-        }
-        .subscribe {
-            print($0)
-        }
-}
-
-
-
-//: Combinelatest version that allows combining sequences with different types.
-
-example("combineLatest 4") {
-    let intOb = Observable.just(2)
-    let stringOb = Observable.just("a")
-    
-    _ = Observable.combineLatest(intOb, stringOb) {
-            "\($0) " + $1
-        }
-        .subscribe {
-            print($0)
-    }
-}
-
-
-//: `combineLatest` extension method for Array of `ObservableType` conformable types
-//: The array must be formed by `Observables` of the same type.
-
-example("combineLatest 5") {
-    let intOb1 = Observable.just(2)
-    let intOb2 = Observable.of(0, 1, 2, 3)
-    let intOb3 = Observable.of(0, 1, 2, 3, 4)
-    
-    _ = [intOb1, intOb2, intOb3].combineLatest { intArray -> Int in
-            Int((intArray[0] + intArray[1]) * intArray[2])
-        }
-        .subscribe { (event: Event<Int>) -> Void in
-            print(event)
-        }
-}
-
-
-
-/*:
-### `zip`
-
-combine the emissions of multiple Observables together via a specified function and emit single items for each combination based on the results of this function
-
-![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/zip.png)
-
-[More info in reactive.io website](http://reactivex.io/documentation/operators/zip.html)
-*/
-example("zip 1") {
-    let intOb1 = PublishSubject<String>()
-    let intOb2 = PublishSubject<Int>()
-
-    _ = Observable.zip(intOb1, intOb2) {
-        "\($0) \($1)"
-        }
-        .subscribe {
-            print($0)
-        }
-
-    intOb1.on(.Next("A"))
-
-    intOb2.on(.Next(1))
-
-    intOb1.on(.Next("B"))
-
-    intOb1.on(.Next("C"))
-
-    intOb2.on(.Next(2))
-}
-
-
-example("zip 2") {
-    let intOb1 = Observable.just(2)
-
-    let intOb2 = Observable.of(0, 1, 2, 3, 4)
-
-    _ = Observable.zip(intOb1, intOb2) {
-            $0 * $1
-        }
-        .subscribe {
-            print($0)
-        }
-}
-
-
-example("zip 3") {
-    let intOb1 = Observable.of(0, 1)
-    let intOb2 = Observable.of(0, 1, 2, 3)
-    let intOb3 = Observable.of(0, 1, 2, 3, 4)
-
-    _ = Observable.zip(intOb1, intOb2, intOb3) {
-            ($0 + $1) * $2
-        }
-        .subscribe {
-            print($0)
-        }
-}
-
-
-
-
-/*:
-### `merge`
-
-combine multiple Observables into one by merging their emissions
-
-![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/merge.png)
-
-[More info in reactive.io website]( http://reactivex.io/documentation/operators/merge.html )
-*/
-example("merge 1") {
-    let subject1 = PublishSubject<Int>()
-    let subject2 = PublishSubject<Int>()
-
-    _ = Observable.of(subject1, subject2)
-        .merge()
-        .subscribeNext { int in
-            print(int)
-        }
-
-    subject1.on(.Next(20))
-    subject1.on(.Next(40))
-    subject1.on(.Next(60))
-    subject2.on(.Next(1))
-    subject1.on(.Next(80))
-    subject1.on(.Next(100))
-    subject2.on(.Next(1))
-}
-
-
-example("merge 2") {
-    let subject1 = PublishSubject<Int>()
-    let subject2 = PublishSubject<Int>()
-
-    _ = Observable.of(subject1, subject2)
-        .merge(maxConcurrent: 2)
-        .subscribe {
-            print($0)
-        }
-
-    subject1.on(.Next(20))
-    subject1.on(.Next(40))
-    subject1.on(.Next(60))
-    subject2.on(.Next(1))
-    subject1.on(.Next(80))
-    subject1.on(.Next(100))
-    subject2.on(.Next(1))
-}
-
-
-
-/*:
-### `switchLatest`
-
-convert an Observable that emits Observables into a single Observable that emits the items emitted by the most-recently-emitted of those Observables
-
-![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/switch.png)
-
-[More info in reactive.io website]( http://reactivex.io/documentation/operators/switch.html )
-*/
-example("switchLatest") {
-    let var1 = Variable(0)
-
-    let var2 = Variable(200)
-
-    // var3 is like an Observable<Observable<Int>>
-    let var3 = Variable(var1.asObservable())
-
-    let d = var3
-        .asObservable()
-        .switchLatest()
-        .subscribe {
-            print($0)
-        }
-
-    var1.value = 1
-    var1.value = 2
-    var1.value = 3
-    var1.value = 4
-
-    var3.value = var2.asObservable()
-
-    var2.value = 201
-
-    var1.value = 5
-    var1.value = 6
-    var1.value = 7
-}
-
-//: [Index](Index) - [Next >>](@next)

Rx.playground/Pages/Combining_Operators.xcplaygroundpage/Contents.swift

@@ -0,0 +1,160 @@
+/*:
+ > # IMPORTANT: To use **Rx.playground**:
+ 1. Open **Rx.xcworkspace**.
+ 1. Build the **RxSwift-OSX** scheme (**Product** → **Build**).
+ 1. Open **Rx** playground in the **Project navigator**.
+ 1. Show the Debug Area (**View** → **Debug Area** → **Show Debug Area**).
+ ----
+ [Previous](@previous) - [Table of Contents](Table_of_Contents)
+ */
+import RxSwift
+/*:
+# Combination Operators
+Operators that combine multiple source `Observable`s into a single `Observable`.
+## `startWith`
+Emits the specified sequence of elements before beginning to emit the elements from the source `Observable`. [More info](http://reactivex.io/documentation/operators/startwith.html)
+![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/startwith.png)
+*/
+example("startWith") {
+    let disposeBag = DisposeBag()
+    
+    Observable.of("🐶", "🐱", "🐭", "🐹")
+        .startWith("1️⃣")
+        .startWith("2️⃣")
+        .startWith("3️⃣", "🅰️", "🅱️")
+        .subscribe(onNext: { print($0) })
+        .addDisposableTo(disposeBag)
+}
+/*:
+ > As this example demonstrates, `startWith` can be chained on a last-in-first-out basis, i.e., each successive `startWith`'s elements will be prepended before the prior `startWith`'s elements.
+ ----
+ ## `merge`
+ Combines elements from source `Observable` sequences into a single new `Observable` sequence, and will emit each element as it is emitted by each source `Observable` sequence. [More info](http://reactivex.io/documentation/operators/merge.html)
+ ![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/merge.png)
+ */
+example("merge") {
+    let disposeBag = DisposeBag()
+    
+    let subject1 = PublishSubject<String>()
+    let subject2 = PublishSubject<String>()
+    
+    Observable.of(subject1, subject2)
+        .merge()
+        .subscribe(onNext: { print($0) })
+        .addDisposableTo(disposeBag)
+    
+    subject1.onNext("🅰️")
+    
+    subject1.onNext("🅱️")
+    
+    subject2.onNext("①")
+    
+    subject2.onNext("②")
+    
+    subject1.onNext("🆎")
+    
+    subject2.onNext("③")
+}
+/*:
+ ----
+ ## `zip`
+ Combines up to 8 source `Observable` sequences into a single new `Observable` sequence, and will emit from the combined `Observable` sequence the elements from each of the source `Observable` sequences at the corresponding index. [More info](http://reactivex.io/documentation/operators/zip.html)
+ ![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/zip.png)
+ */
+example("zip") {
+    let disposeBag = DisposeBag()
+    
+    let stringSubject = PublishSubject<String>()
+    let intSubject = PublishSubject<Int>()
+    
+    Observable.zip(stringSubject, intSubject) { stringElement, intElement in
+        "\(stringElement) \(intElement)"
+        }
+        .subscribe(onNext: { print($0) })
+        .addDisposableTo(disposeBag)
+    
+    stringSubject.onNext("🅰️")
+    stringSubject.onNext("🅱️")
+    
+    intSubject.onNext(1)
+    
+    intSubject.onNext(2)
+    
+    stringSubject.onNext("🆎")
+    intSubject.onNext(3)
+}
+/*:
+ ----
+ ## `combineLatest`
+ Combines up to 8 source `Observable` sequences into a single new `Observable` sequence, and will begin emitting from the combined `Observable` sequence the latest elements of each source `Observable` sequence once all source sequences have emitted at least one element, and also when any of the source `Observable` sequences emits a new element. [More info](http://reactivex.io/documentation/operators/combinelatest.html)
+ ![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/combinelatest.png)
+ */
+example("combineLatest") {
+    let disposeBag = DisposeBag()
+    
+    let stringSubject = PublishSubject<String>()
+    let intSubject = PublishSubject<Int>()
+    
+    Observable.combineLatest(stringSubject, intSubject) { stringElement, intElement in
+            "\(stringElement) \(intElement)"
+        }
+        .subscribe(onNext: { print($0) })
+        .addDisposableTo(disposeBag)
+    
+    stringSubject.onNext("🅰️")
+    
+    stringSubject.onNext("🅱️")
+    intSubject.onNext(1)
+    
+    intSubject.onNext(2)
+    
+    stringSubject.onNext("🆎")
+}
+//: There is also a `combineLatest` extension on `Array`:
+example("Array.combineLatest") {
+    let disposeBag = DisposeBag()
+    
+    let stringObservable = Observable.just("❤️")
+    let fruitObservable = Observable.from(["🍎", "🍐", "🍊"])
+    let animalObservable = Observable.of("🐶", "🐱", "🐭", "🐹")
+    
+    [stringObservable, fruitObservable, animalObservable].combineLatest {
+            "\($0[0]) \($0[1]) \($0[2])"
+        }
+        .subscribe(onNext: { print($0) })
+        .addDisposableTo(disposeBag)
+}
+/*:
+ > The `combineLatest` extension on `Array` requires that all source `Observable` sequences are of the same type.
+ ----
+ ## `switchLatest`
+ Transforms the elements emitted by an `Observable` sequence into `Observable` sequences, and emits elements from the most recent inner `Observable` sequence. [More info](http://reactivex.io/documentation/operators/switch.html)
+ ![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/switch.png)
+ */
+example("switchLatest") {
+    let disposeBag = DisposeBag()
+    
+    let subject1 = BehaviorSubject(value: "⚽️")
+    let subject2 = BehaviorSubject(value: "🍎")
+    
+    let variable = Variable(subject1)
+        
+    variable.asObservable()
+        .switchLatest()
+        .subscribe(onNext: { print($0) })
+        .addDisposableTo(disposeBag)
+    
+    subject1.onNext("🏈")
+    subject1.onNext("🏀")
+    
+    variable.value = subject2
+    
+    subject1.onNext("⚾️")
+    
+    subject2.onNext("🍐")
+}
+/*:
+ > In this example, adding ⚾️ onto `subject1` after setting `variable.value` to `subject2` has no effect, because only the most recent inner `Observable` sequence (`subject2`) will emit elements.
+ */
+
+//: [Next](@next) - [Table of Contents](Table_of_Contents)

Rx.playground/Pages/Conditional_and_Boolean_Operators.xcplaygroundpage/Contents.swift

@@ -1,82 +0,0 @@
-/*:
-> # IMPORTANT: To use `Rx.playground`, please:
-
-1. Open `Rx.xcworkspace`
-2. Build `RxSwift-OSX` scheme
-3. And then open `Rx` playground in `Rx.xcworkspace` tree view.
-4. Choose `View > Show Debug Area`
-*/
-
-//: [<< Previous](@previous) - [Index](Index)
-
-import Cocoa
-import RxSwift
-
-/*:
-## Conditional and Boolean Operators
-
-Operators that evaluate one or more Observables or items emitted by Observables.
-
-*/
-
-/*:
-### `takeUntil`
-Discard any items emitted by an Observable after a second Observable emits an item or terminates.
-
-![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/takeuntil.png)
-
-[More info in reactive.io website]( http://reactivex.io/documentation/operators/takeuntil.html )
-*/
-
-example("takeUntil") {
-    let originalSequence = PublishSubject<Int>()
-    let whenThisSendsNextWorldStops = PublishSubject<Int>()
-
-    _ = originalSequence
-        .takeUntil(whenThisSendsNextWorldStops)
-        .subscribe {
-            print($0)
-        }
-
-    originalSequence.on(.Next(1))
-    originalSequence.on(.Next(2))
-    originalSequence.on(.Next(3))
-    originalSequence.on(.Next(4))
-
-    whenThisSendsNextWorldStops.on(.Next(1))
-
-    originalSequence.on(.Next(5))
-}
-
-
-/*:
-### `takeWhile`
-
-Mirror items emitted by an Observable until a specified condition becomes false
-
-![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/takewhile.png)
-
-[More info in reactive.io website]( http://reactivex.io/documentation/operators/takewhile.html )
-*/
-example("takeWhile") {
-
-    let sequence = PublishSubject<Int>()
-
-    _ = sequence
-        .takeWhile { int in
-            int < 4
-        }
-        .subscribe {
-            print($0)
-        }
-
-    sequence.on(.Next(1))
-    sequence.on(.Next(2))
-    sequence.on(.Next(3))
-    sequence.on(.Next(4))
-    sequence.on(.Next(5))
-}
-
-
-
-//: [Index](Index) - [Next >>](@next)

Rx.playground/Pages/Connectable_Observable_Operators.xcplaygroundpage/Contents.swift

@@ -1,221 +0,0 @@
-/*:
-> # IMPORTANT: To use `Rx.playground`, please:
-
-1. Open `Rx.xcworkspace`
-2. Build `RxSwift-OSX` scheme
-3. And then open `Rx` playground in `Rx.xcworkspace` tree view.
-4. Choose `View > Show Debug Area`
-*/
-
-//: [<< Previous](@previous) - [Index](Index)
-
-import RxSwift
-
-
-/*:
- ## Below every example there is a commented method call that runs that example. To run the example just uncomment that part. 
- 
- E.g. `//sampleWithoutConnectableOperators()`
-*/
-
-
-/*:
-## Connectable Observable Operators
-
-A Connectable Observable resembles an ordinary Observable, except that it does not begin emitting items when it is subscribed to, but only when its connect() method is called. In this way you can wait for all intended Subscribers to subscribe to the Observable before the Observable begins emitting items.
-
-Specialty Observables that have more precisely-controlled subscription dynamics.
-*/
-
-func sampleWithoutConnectableOperators() {
-
-    let int1 = Observable<Int>.interval(1, scheduler: MainScheduler.instance)
-
-    _ = int1
-        .subscribe {
-            print("first subscription \($0)")
-        }
-
-    delay(5) {
-        _ = int1
-            .subscribe {
-                print("second subscription \($0)")
-            }
-    }
-
-}
-
-//sampleWithoutConnectableOperators()
-
-
-
-/*:
-### `multicast`
-
-![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/publishconnect.png)
-
-[More info in reactive.io website]( http://reactivex.io/documentation/operators/publish.html )
-*/
-func sampleWithMulticast() {
-
-    let subject1 = PublishSubject<Int64>()
-
-    _ = subject1
-        .subscribe {
-            print("Subject \($0)")
-        }
-
-    let int1 = Observable<Int64>.interval(1, scheduler: MainScheduler.instance)
-        .multicast(subject1)
-
-    _ = int1
-        .subscribe {
-            print("first subscription \($0)")
-        }
-
-    delay(2) {
-        int1.connect()
-    }
-
-    delay(4) {
-        _ = int1
-            .subscribe {
-                print("second subscription \($0)")
-            }
-    }
-
-    delay(6) {
-        _ = int1
-            .subscribe {
-                print("third subscription \($0)")
-            }
-    }
-
-}
-
-// sampleWithMulticast()
-
-
-/*:
-### `replay`
-Ensure that all observers see the same sequence of emitted items, even if they subscribe after the Observable has begun emitting items.
-
-publish = multicast + replay subject
-
-![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/replay.png)
-
-[More info in reactive.io website]( http://reactivex.io/documentation/operators/replay.html )
-*/
-func sampleWithReplayBuffer0() {
-
-    let int1 = Observable<Int>.interval(1, scheduler: MainScheduler.instance)
-        .replay(0)
-
-    _ = int1
-        .subscribe {
-            print("first subscription \($0)")
-        }
-
-    delay(2) {
-        int1.connect()
-    }
-
-    delay(4) {
-        _ = int1
-            .subscribe {
-                print("second subscription \($0)")
-            }
-    }
-
-    delay(6) {
-        _ = int1
-            .subscribe {
-                print("third subscription \($0)")
-            }
-    }
-
-}
-
-// sampleWithReplayBuffer0()
-
-
-func sampleWithReplayBuffer2() {
-
-    print("--- sampleWithReplayBuffer2 ---\n")
-
-    let int1 = Observable<Int>.interval(1, scheduler: MainScheduler.instance)
-        .replay(2)
-
-    _ = int1
-        .subscribe {
-            print("first subscription \($0)")
-        }
-
-    delay(2) {
-        int1.connect()
-    }
-
-    delay(4) {
-        _ = int1
-            .subscribe {
-                print("second subscription \($0)")
-            }
-    }
-
-    delay(6) {
-        _ = int1
-            .subscribe {
-                print("third subscription \($0)")
-            }
-    }
-
-}
-
-// sampleWithReplayBuffer2()
-
-
-/*:
-### `publish`
-Convert an ordinary Observable into a connectable Observable.
-
-publish = multicast + publish subject
-
-so publish is basically replay(0)
-
-[More info in reactive.io website]( http://reactivex.io/documentation/operators/publish.html )
-*/
-func sampleWithPublish() {
-
-    let int1 = Observable<Int>.interval(1, scheduler: MainScheduler.instance)
-        .publish()
-
-    _ = int1
-        .subscribe {
-            print("first subscription \($0)")
-        }
-
-    delay(2) {
-        int1.connect()
-    }
-
-    delay(4) {
-        _ = int1
-            .subscribe {
-                print("second subscription \($0)")
-            }
-    }
-
-    delay(6) {
-        _ = int1
-            .subscribe {
-                print("third subscription \($0)")
-            }
-    }
-
-}
-
-// sampleWithPublish()
-
-playgroundShouldContinueIndefinitely()
-
-//: [Index](Index)

Rx.playground/Pages/Connectable_Operators.xcplaygroundpage/Contents.swift

@@ -0,0 +1,133 @@
+/*:
+ > # IMPORTANT: To use **Rx.playground**:
+ 1. Open **Rx.xcworkspace**.
+ 1. Build the **RxSwift-OSX** scheme (**Product** → **Build**).
+ 1. Open **Rx** playground in the **Project navigator**.
+ 1. Show the Debug Area (**View** → **Debug Area** → **Show Debug Area**).
+ ----
+ [Previous](@previous) - [Table of Contents](Table_of_Contents)
+ */
+import RxSwift
+
+playgroundShouldContinueIndefinitely()
+/*:
+## Connectable Operators
+ Connectable `Observable` sequences resembles ordinary `Observable` sequences, except that they not begin emitting elements when subscribed to, but instead, only when their `connect()` method is called. In this way, you can wait for all intended subscribers to subscribe to a connectable `Observable` sequence before it begins emitting elements.
+ > Within each example on this page is a commented-out method. Uncomment that method to run the example, and then comment it out again to stop running the example.
+ #
+ Before learning about connectable operators, let's take a look at an example of a non-connectable operator:
+*/
+func sampleWithoutConnectableOperators() {
+    printExampleHeader(#function)
+    
+    let interval = Observable<Int>.interval(1, scheduler: MainScheduler.instance)
+    
+    _ = interval
+        .subscribe(onNext: { print("Subscription: 1, Event: \($0)") })
+    
+    delay(5) {
+        _ = interval
+            .subscribe(onNext: { print("Subscription: 2, Event: \($0)") })
+    }
+}
+
+//sampleWithoutConnectableOperators() // ⚠️ Uncomment to run this example; comment to stop running
+/*:
+ > `interval` creates an `Observable` sequence that emits elements after each `period`, on the specified scheduler. [More info](http://reactivex.io/documentation/operators/interval.html)
+ ![](http://reactivex.io/documentation/operators/images/interval.c.png)
+ ----
+ ## `publish`
+ Converts the source `Observable` sequence into a connectable sequence. [More info](http://reactivex.io/documentation/operators/publish.html)
+ ![](http://reactivex.io/documentation/operators/images/publishConnect.c.png)
+ */
+func sampleWithPublish() {
+    printExampleHeader(#function)
+    
+    let intSequence = Observable<Int>.interval(1, scheduler: MainScheduler.instance)
+        .publish()
+    
+    _ = intSequence
+        .subscribe(onNext: { print("Subscription 1:, Event: \($0)") })
+    
+    delay(2) { _ = intSequence.connect() }
+    
+    delay(4) {
+        _ = intSequence
+            .subscribe(onNext: { print("Subscription 2:, Event: \($0)") })
+    }
+    
+    delay(6) {
+        _ = intSequence
+            .subscribe(onNext: { print("Subscription 3:, Event: \($0)") })
+    }
+}
+
+//sampleWithPublish() // ⚠️ Uncomment to run this example; comment to stop running
+
+//: > Schedulers are an abstraction of mechanisms for performing work, such as on specific threads or dispatch queues. [More info](https://github.com/ReactiveX/RxSwift/blob/master/Documentation/Schedulers.md)
+
+/*:
+ ----
+ ## `replay`
+ Converts the source `Observable` sequence into a connectable sequence, and will replay `bufferSize` number of previous emissions to each new subscriber. [More info](http://reactivex.io/documentation/operators/replay.html)
+ ![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/replay.png)
+ */
+func sampleWithReplayBuffer() {
+    printExampleHeader(#function)
+    
+    let intSequence = Observable<Int>.interval(1, scheduler: MainScheduler.instance)
+        .replay(5)
+    
+    _ = intSequence
+        .subscribe(onNext: { print("Subscription 1:, Event: \($0)") })
+    
+    delay(2) { _ = intSequence.connect() }
+    
+    delay(4) {
+        _ = intSequence
+            .subscribe(onNext: { print("Subscription 2:, Event: \($0)") })
+    }
+    
+    delay(8) {
+        _ = intSequence
+            .subscribe(onNext: { print("Subscription 3:, Event: \($0)") })
+    }
+}
+
+// sampleWithReplayBuffer() // ⚠️ Uncomment to run this example; comment to stop running
+
+/*:
+ ----
+ ## `multicast`
+ Converts the source `Observable` sequence into a connectable sequence, and broadcasts its emissions via the specified `subject`.
+ */
+func sampleWithMulticast() {
+    printExampleHeader(#function)
+    
+    let subject = PublishSubject<Int>()
+    
+    _ = subject
+        .subscribe(onNext: { print("Subject: \($0)") })
+    
+    let intSequence = Observable<Int>.interval(1, scheduler: MainScheduler.instance)
+        .multicast(subject)
+    
+    _ = intSequence
+        .subscribe(onNext: { print("\tSubscription 1:, Event: \($0)") })
+    
+    delay(2) { _ = intSequence.connect() }
+    
+    delay(4) {
+        _ = intSequence
+            .subscribe(onNext: { print("\tSubscription 2:, Event: \($0)") })
+    }
+    
+    delay(6) {
+        _ = intSequence
+            .subscribe(onNext: { print("\tSubscription 3:, Event: \($0)") })
+    }
+}
+
+//sampleWithMulticast() // ⚠️ Uncomment to run this example; comment to stop running
+
+//: [Next](@next) - [Table of Contents](Table_of_Contents)

Rx.playground/Pages/Creating_and_Subscribing_to_Observables.xcplaygroundpage/Contents.swift

@@ -0,0 +1,212 @@
+/*:
+ > # IMPORTANT: To use **Rx.playground**:
+ 1. Open **Rx.xcworkspace**.
+ 1. Build the **RxSwift-OSX** scheme (**Product** → **Build**).
+ 1. Open **Rx** playground in the **Project navigator**.
+ 1. Show the Debug Area (**View** → **Debug Area** → **Show Debug Area**).
+ ----
+ [Previous](@previous) - [Table of Contents](Table_of_Contents)
+ */
+import RxSwift
+/*:
+ # Creating and Subscribing to `Observable`s
+ There are several ways to create and subscribe to `Observable` sequences.
+ ## never
+ Creates a sequence that never terminates and never emits any events. [More info](http://reactivex.io/documentation/operators/empty-never-throw.html)
+ */
+example("never") {
+    let disposeBag = DisposeBag()
+    let neverSequence = Observable<String>.never()
+    
+    let neverSequenceSubscription = neverSequence
+        .subscribe { _ in
+            print("This will never be printed")
+    }
+    
+    neverSequenceSubscription.addDisposableTo(disposeBag)
+}
+/*:
+ ----
+ ## empty
+ Creates an empty `Observable` sequence that only emits a Completed event. [More info](http://reactivex.io/documentation/operators/empty-never-throw.html)
+ */
+example("empty") {
+    let disposeBag = DisposeBag()
+    
+    Observable<Int>.empty()
+        .subscribe { event in
+            print(event)
+        }
+        .addDisposableTo(disposeBag)
+}
+/*:
+ > This example also introduces chaining together creating and subscribing to an `Observable` sequence.
+ ----
+ ## just
+ Creates an `Observable` sequence with a single element. [More info](http://reactivex.io/documentation/operators/just.html)
+ */
+example("just") {
+    let disposeBag = DisposeBag()
+    
+    Observable.just("🔴")
+        .subscribe { event in
+            print(event)
+        }
+        .addDisposableTo(disposeBag)
+}
+/*:
+ ----
+ ## of
+ Creates an `Observable` sequence with a fixed number of elements.
+ */
+example("of") {
+    let disposeBag = DisposeBag()
+    
+    Observable.of("🐶", "🐱", "🐭", "🐹")
+        .subscribe(onNext: { element in
+            print(element)
+        })
+        .addDisposableTo(disposeBag)
+}
+/*:
+ > This example also introduces using the `subscribe(onNext:)` convenience method. Unlike `subscribe(_:)`, which subscribes an _event_ handler for all event types (Next, Error, and Completed), `subscribe(onNext:)` subscribes an _element_ handler that will ignore Error and Completed events and only produce Next event elements. There are also `subscribe(onError:)` and `subscribe(onCompleted:)` convenience methods, should you only want to subscribe to those event types. And there is a `subscribe(onNext:onError:onCompleted:onDisposed:)` method, which allows you to react to one or more event types and when the subscription is terminated for any reason, or disposed, in a single call:
+ ```
+ someObservable.subscribe(
+     onNext: { print("Element:", $0) },
+     onError: { print("Error:", $0) },
+     onCompleted: { print("Completed") },
+     onDisposed: { print("Disposed") }
+ )
+```
+ ----
+ ## from
+ Creates an `Observable` sequence from a `SequenceType`, such as an `Array`, `Dictionary`, or `Set`.
+ */
+example("from") {
+    let disposeBag = DisposeBag()
+    
+    Observable.from(["🐶", "🐱", "🐭", "🐹"])
+        .subscribe(onNext: { print($0) })
+        .addDisposableTo(disposeBag)
+}
+/*:
+ > This example also demonstrates using the default argument name `$0` instead of explicitly naming the argument.
+----
+ ## create
+ Creates a custom `Observable` sequence. [More info](http://reactivex.io/documentation/operators/create.html)
+*/
+example("create") {
+    let disposeBag = DisposeBag()
+    
+    let myJust = { (element: String) -> Observable<String> in
+        return Observable.create { observer in
+            observer.on(.next(element))
+            observer.on(.completed)
+            return Disposables.create()
+        }
+    }
+        
+    myJust("🔴")
+        .subscribe { print($0) }
+        .addDisposableTo(disposeBag)
+}
+/*:
+ ----
+ ## range
+ Creates an `Observable` sequence that emits a range of sequential integers and then terminates. [More info](http://reactivex.io/documentation/operators/range.html)
+ */
+example("range") {
+    let disposeBag = DisposeBag()
+    
+    Observable.range(start: 1, count: 10)
+        .subscribe { print($0) }
+        .addDisposableTo(disposeBag)
+}
+/*:
+ ----
+ ## repeatElement
+ Creates an `Observable` sequence that emits the given element indefinitely. [More info](http://reactivex.io/documentation/operators/repeat.html)
+ */
+example("repeatElement") {
+    let disposeBag = DisposeBag()
+    
+    Observable.repeatElement("🔴")
+        .take(3)
+        .subscribe(onNext: { print($0) })
+        .addDisposableTo(disposeBag)
+}
+/*:
+ > This example also introduces using the `take` operator to return a specified number of elements from the start of a sequence.
+ ----
+ ## generate
+ Creates an `Observable` sequence that generates values for as long as the provided condition evaluates to `true`.
+ */
+example("generate") {
+    let disposeBag = DisposeBag()
+    
+    Observable.generate(
+            initialState: 0,
+            condition: { $0 < 3 },
+            iterate: { $0 + 1 }
+        )
+        .subscribe(onNext: { print($0) })
+        .addDisposableTo(disposeBag)
+}
+/*:
+ ----
+ ## deferred
+ Creates a new `Observable` sequence for each subscriber. [More info](http://reactivex.io/documentation/operators/defer.html)
+ */
+example("deferred") {
+    let disposeBag = DisposeBag()
+    var count = 1
+    
+    let deferredSequence = Observable<String>.deferred {
+        print("Creating \(count)")
+        count += 1
+        
+        return Observable.create { observer in
+            print("Emitting...")
+            observer.onNext("🐶")
+            observer.onNext("🐱")
+            observer.onNext("🐵")
+            return Disposables.create()
+        }
+    }
+    
+    deferredSequence
+        .subscribe(onNext: { print($0) })
+        .addDisposableTo(disposeBag)
+    
+    deferredSequence
+        .subscribe(onNext: { print($0) })
+        .addDisposableTo(disposeBag)
+}
+/*:
+ ----
+ ## error
+ Creates an `Observable` sequence that emits no items and immediately terminates with an error.
+ */
+example("error") {
+    let disposeBag = DisposeBag()
+        
+    Observable<Int>.error(TestError.test)
+        .subscribe { print($0) }
+        .addDisposableTo(disposeBag)
+}
+/*:
+ ----
+ ## doOn
+ Invokes a side-effect action for each emitted event and returns (passes through) the original event. [More info](http://reactivex.io/documentation/operators/do.html)
+ */
+example("doOn") {
+    let disposeBag = DisposeBag()
+    
+    Observable.of("🍎", "🍐", "🍊", "🍋")
+        .do(onNext: { print("Intercepted:", $0) }, onError: { print("Intercepted error:", $0) }, onCompleted: { print("Completed")  })
+        .subscribe(onNext: { print($0) })
+        .addDisposableTo(disposeBag)
+}
+//: > There are also `doOnNext(_:)`, `doOnError(_:)`, and `doOnCompleted(_:)` convenience methods to intercept those specific events, and `doOn(onNext:onError:onCompleted:)` to intercept one or more events in a single call.
+
+//: [Next](@next) - [Table of Contents](Table_of_Contents)

Rx.playground/Pages/Debugging_Operators.xcplaygroundpage/Contents.swift

@@ -0,0 +1,83 @@
+/*:
+ > # IMPORTANT: To use **Rx.playground**:
+ 1. Open **Rx.xcworkspace**.
+ 1. Build the **RxSwift-OSX** scheme (**Product** → **Build**).
+ 1. Open **Rx** playground in the **Project navigator**.
+ 1. Show the Debug Area (**View** → **Debug Area** → **Show Debug Area**).
+ ----
+ [Previous](@previous) - [Table of Contents](Table_of_Contents)
+ */
+import RxSwift
+/*:
+ # Debugging Operators
+ Operators to help debug Rx code.
+ ## `debug`
+ Prints out all subscriptions, events, and disposals.
+ */
+example("debug") {
+    let disposeBag = DisposeBag()
+    var count = 1
+    
+    let sequenceThatErrors = Observable<String>.create { observer in
+        observer.onNext("🍎")
+        observer.onNext("🍐")
+        observer.onNext("🍊")
+        
+        if count < 5 {
+            observer.onError(TestError.test)
+            print("Error encountered")
+            count += 1
+        }
+        
+        observer.onNext("🐶")
+        observer.onNext("🐱")
+        observer.onNext("🐭")
+        observer.onCompleted()
+        
+        return Disposables.create()
+    }
+    
+    sequenceThatErrors
+        .retry(3)
+        .debug()
+        .subscribe(onNext: { print($0) })
+        .addDisposableTo(disposeBag)
+}
+/*:
+ ----
+ ## `RxSwift.resourceCount`
+ Provides a count of all Rx resource allocations, which is useful for detecting leaks during development.
+ */
+#if NOT_IN_PLAYGROUND
+#else
+example("RxSwift.resourceCount") {
+    print(RxSwift.resourceCount)
+    
+    let disposeBag = DisposeBag()
+    
+    print(RxSwift.resourceCount)
+    
+    let variable = Variable("🍎")
+    
+    let subscription1 = variable.asObservable().subscribe(onNext: { print($0) })
+    
+    print(RxSwift.resourceCount)
+    
+    let subscription2 = variable.asObservable().subscribe(onNext: { print($0) })
+    
+    print(RxSwift.resourceCount)
+    
+    subscription1.dispose()
+    
+    print(RxSwift.resourceCount)
+    
+    subscription2.dispose()
+    
+    print(RxSwift.resourceCount)
+}
+    
+print(RxSwift.resourceCount)
+#endif
+//: > `RxSwift.resourceCount` is not enabled by default, and should generally not be enabled in Release builds. [Click here](Enable_RxSwift.resourceCount) for instructions on how to enable it.
+
+//: [Next](@next) - [Table of Contents](Table_of_Contents)

Rx.playground/Pages/Enable_RxSwift.resourceCount.xcplaygroundpage/Contents.swift

@@ -0,0 +1,30 @@
+//: [Back](@previous)
+/*:
+ Follow these instructions to enable `RxSwift.resourceCount` in your project:
+ #
+ **CocoaPods**
+ 1. Add a `post_install` hook to your Podfile, e.g.:
+ ```
+ target 'AppTarget' do
+ pod 'RxSwift'
+ end
+ 
+ post_install do |installer|
+     installer.pods_project.targets.each do |target|
+         if target.name == 'RxSwift'
+             target.build_configurations.each do |config|
+                 if config.name == 'Debug'
+                     config.build_settings['OTHER_SWIFT_FLAGS'] ||= ['-D', 'TRACE_RESOURCES']
+                 end
+             end
+         end
+     end
+ end
+ ```
+ 2. Run `pod update`.
+ 3. Build project (**Product** → **Build**).
+ #
+ **Carthage**
+ 1. Run `carthage build --configuration Debug`.
+ 2. Build project (**Product** → **Build**).
+ */

Rx.playground/Pages/Error_Handling_Operators.xcplaygroundpage/Contents.swift

@@ -1,103 +1,131 @@
 /*:
-> # IMPORTANT: To use `Rx.playground`, please:
-
-1. Open `Rx.xcworkspace`
-2. Build `RxSwift-OSX` scheme
-3. And then open `Rx` playground in `Rx.xcworkspace` tree view.
-4. Choose `View > Show Debug Area`
-*/
-
-//: [<< Previous](@previous) - [Index](Index)
-
+ > # IMPORTANT: To use **Rx.playground**:
+ 1. Open **Rx.xcworkspace**.
+ 1. Build the **RxSwift-OSX** scheme (**Product** → **Build**).
+ 1. Open **Rx** playground in the **Project navigator**.
+ 1. Show the Debug Area (**View** → **Debug Area** → **Show Debug Area**).
+ ----
+ [Previous](@previous) - [Table of Contents](Table_of_Contents)
+ */
 import RxSwift
-import Foundation
 /*:
-## Error Handling Operators
-
+# Error Handling Operators
 Operators that help to recover from error notifications from an Observable.
-*/
-
-/*:
-### `catchError`
-
-Recover from an `Error` notification by continuing the sequence without error
-
+## `catchErrorJustReturn`
+Recovers from an Error event by returning an `Observable` sequence that emits a single element and then terminates. [More info](http://reactivex.io/documentation/operators/catch.html)
 ![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/catch.png)
-
-[More info in reactive.io website]( http://reactivex.io/documentation/operators/catch.html )
 */
-example("catchError 1") {
-    let sequenceThatFails = PublishSubject<Int>()
-    let recoverySequence = Observable.of(100, 200, 300, 400)
-
-    _ = sequenceThatFails
-        .catchError { error in
+example("catchErrorJustReturn") {
+    let disposeBag = DisposeBag()
+    
+    let sequenceThatFails = PublishSubject<String>()
+    
+    sequenceThatFails
+        .catchErrorJustReturn("😊")
+        .subscribe { print($0) }
+        .addDisposableTo(disposeBag)
+    
+    sequenceThatFails.onNext("😬")
+    sequenceThatFails.onNext("😨")
+    sequenceThatFails.onNext("😡")
+    sequenceThatFails.onNext("🔴")
+    sequenceThatFails.onError(TestError.test)
+}
+/*:
+ ----
+ ## `catchError`
+ Recovers from an Error event by switching to the provided recovery `Observable` sequence. [More info](http://reactivex.io/documentation/operators/catch.html)
+ ![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/catch.png)
+ */
+example("catchError") {
+    let disposeBag = DisposeBag()
+    
+    let sequenceThatFails = PublishSubject<String>()
+    let recoverySequence = PublishSubject<String>()
+    
+    sequenceThatFails
+        .catchError {
+            print("Error:", $0)
             return recoverySequence
         }
-        .subscribe {
-            print($0)
-        }
-
-    sequenceThatFails.on(.Next(1))
-    sequenceThatFails.on(.Next(2))
-    sequenceThatFails.on(.Next(3))
-    sequenceThatFails.on(.Next(4))
-    sequenceThatFails.on(.Error(NSError(domain: "Test", code: 0, userInfo: nil)))
+        .subscribe { print($0) }
+        .addDisposableTo(disposeBag)
+    
+    sequenceThatFails.onNext("😬")
+    sequenceThatFails.onNext("😨")
+    sequenceThatFails.onNext("😡")
+    sequenceThatFails.onNext("🔴")
+    sequenceThatFails.onError(TestError.test)
+    
+    recoverySequence.onNext("😊")
 }
-
-
-example("catchError 2") {
-    let sequenceThatFails = PublishSubject<Int>()
-
-    _ = sequenceThatFails
-        .catchErrorJustReturn(100)
-        .subscribe {
-            print($0)
-        }
-
-    sequenceThatFails.on(.Next(1))
-    sequenceThatFails.on(.Next(2))
-    sequenceThatFails.on(.Next(3))
-    sequenceThatFails.on(.Next(4))
-    sequenceThatFails.on(.Error(NSError(domain: "Test", code: 0, userInfo: nil)))
-}
-
-
-
 /*:
-### `retry`
-
-If a source Observable emits an error, resubscribe to it in the hopes that it will complete without error
-
-![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/retry.png)
-
-[More info in reactive.io website]( http://reactivex.io/documentation/operators/retry.html )
-*/
+ ----
+ ## `retry`
+ Recovers repeatedly Error events by resubscribing to the `Observable` sequence, indefinitely. [More info](http://reactivex.io/documentation/operators/retry.html)
+ ![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/retry.png)
+ */
 example("retry") {
-    var count = 1 // bad practice, only for example purposes
-    let funnyLookingSequence = Observable<Int>.create { observer in
-        let error = NSError(domain: "Test", code: 0, userInfo: nil)
-        observer.on(.Next(0))
-        observer.on(.Next(1))
-        observer.on(.Next(2))
-        if count < 2 {
-            observer.on(.Error(error))
+    let disposeBag = DisposeBag()
+    var count = 1
+    
+    let sequenceThatErrors = Observable<String>.create { observer in
+        observer.onNext("🍎")
+        observer.onNext("🍐")
+        observer.onNext("🍊")
+        
+        if count == 1 {
+            observer.onError(TestError.test)
+            print("Error encountered")
             count += 1
         }
-        observer.on(.Next(3))
-        observer.on(.Next(4))
-        observer.on(.Next(5))
-        observer.on(.Completed)
-
-        return NopDisposable.instance
+        
+        observer.onNext("🐶")
+        observer.onNext("🐱")
+        observer.onNext("🐭")
+        observer.onCompleted()
+        
+        return Disposables.create()
     }
-
-    _ = funnyLookingSequence
+    
+    sequenceThatErrors
         .retry()
-        .subscribe {
-            print($0)
+        .subscribe(onNext: { print($0) })
+        .addDisposableTo(disposeBag)
+}
+/*:
+ ----
+ ## `retry(_:)`
+Recovers repeatedly from Error events by resubscribing to the `Observable` sequence, up to `maxAttemptCount` number of retries. [More info](http://reactivex.io/documentation/operators/retry.html)
+ ![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/retry.png)
+ */
+example("retry maxAttemptCount") {
+    let disposeBag = DisposeBag()
+    var count = 1
+    
+    let sequenceThatErrors = Observable<String>.create { observer in
+        observer.onNext("🍎")
+        observer.onNext("🍐")
+        observer.onNext("🍊")
+        
+        if count < 5 {
+            observer.onError(TestError.test)
+            print("Error encountered")
+            count += 1
         }
+        
+        observer.onNext("🐶")
+        observer.onNext("🐱")
+        observer.onNext("🐭")
+        observer.onCompleted()
+        
+        return Disposables.create()
+    }
+    
+    sequenceThatErrors
+        .retry(3)
+        .subscribe(onNext: { print($0) })
+        .addDisposableTo(disposeBag)
 }
 
-
-//: [Index](Index) - [Next >>](@next)
+//: [Next](@next) - [Table of Contents](Table_of_Contents)

Rx.playground/Pages/Filtering_Observables.xcplaygroundpage/Contents.swift

@@ -1,78 +0,0 @@
-/*:
-> # IMPORTANT: To use `Rx.playground`, please:
-
-1. Open `Rx.xcworkspace`
-2. Build `RxSwift-OSX` scheme
-3. And then open `Rx` playground in `Rx.xcworkspace` tree view.
-4. Choose `View > Show Debug Area`
-*/
-
-//: [<< Previous](@previous) - [Index](Index)
-
-import RxSwift
-
-/*:
-## Filtering Observables
-
-Operators that selectively emit items from a source Observable.
-*/
-
-/*:
-### `filter`
-
-Emit only those items from an Observable that pass a predicate test
-
-![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/filter.png)
-
-[More info in reactive.io website]( http://reactivex.io/documentation/operators/filter.html )
-*/
-
-example("filter") {
-    let subscription = Observable.of(0, 1, 2, 3, 4, 5, 6, 7, 8, 9)
-        .filter {
-            $0 % 2 == 0
-        }
-        .subscribe {
-            print($0)
-        }
-}
-
-
-/*:
-### `distinctUntilChanged`
-
-Suppress duplicate items emitted by an Observable
-
-![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/distinct.png)
-
-[More info in reactive.io website]( http://reactivex.io/documentation/operators/distinct.html )
-*/
-example("distinctUntilChanged") {
-    let subscription = Observable.of(1, 2, 3, 1, 1, 4)
-        .distinctUntilChanged()
-        .subscribe {
-            print($0)
-        }
-}
-
-
-/*:
-### `take`
-
-Emit only the first n items emitted by an Observable
-
-![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/take.png)
-
-[More info in reactive.io website]( http://reactivex.io/documentation/operators/take.html )
-*/
-example("take") {
-    let subscription = Observable.of(1, 2, 3, 4, 5, 6)
-        .take(3)
-        .subscribe {
-            print($0)
-        }
-}
-
-
-
-//: [Index](Index) - [Next >>](@next)

Rx.playground/Pages/Filtering_and_Conditional_Operators.xcplaygroundpage/Contents.swift

@@ -0,0 +1,231 @@
+/*:
+ > # IMPORTANT: To use **Rx.playground**:
+ 1. Open **Rx.xcworkspace**.
+ 1. Build the **RxSwift-OSX** scheme (**Product** → **Build**).
+ 1. Open **Rx** playground in the **Project navigator**.
+ 1. Show the Debug Area (**View** → **Debug Area** → **Show Debug Area**).
+ ----
+ [Previous](@previous) - [Table of Contents](Table_of_Contents)
+ */
+import RxSwift
+/*:
+# Filtering and Conditional Operators
+Operators that selectively emit elements from a source `Observable` sequence.
+## `filter`
+Emits only those elements from an `Observable` sequence that meet the specified condition. [More info](http://reactivex.io/documentation/operators/filter.html)
+![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/filter.png)
+*/
+example("filter") {
+    let disposeBag = DisposeBag()
+    
+    Observable.of(
+        "🐱", "🐰", "🐶",
+        "🐸", "🐱", "🐰",
+        "🐹", "🐸", "🐱")
+        .filter {
+            $0 == "🐱"
+        }
+        .subscribe(onNext: { print($0) })
+        .addDisposableTo(disposeBag)
+}
+/*:
+ ----
+## `distinctUntilChanged`
+ Suppresses sequential duplicate elements emitted by an `Observable` sequence. [More info](http://reactivex.io/documentation/operators/distinct.html)
+![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/distinct.png)
+*/
+example("distinctUntilChanged") {
+    let disposeBag = DisposeBag()
+    
+    Observable.of("🐱", "🐷", "🐱", "🐱", "🐱", "🐵", "🐱")
+        .distinctUntilChanged()
+        .subscribe(onNext: { print($0) })
+        .addDisposableTo(disposeBag)
+}
+/*:
+ ----
+ ## `elementAt`
+ Emits only the element at the specified index of all elements emitted by an `Observable` sequence. [More info](http://reactivex.io/documentation/operators/elementat.html)
+ ![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/elementat.png)
+ */
+example("elementAt") {
+    let disposeBag = DisposeBag()
+    
+    Observable.of("🐱", "🐰", "🐶", "🐸", "🐷", "🐵")
+        .elementAt(3)
+        .subscribe(onNext: { print($0) })
+        .addDisposableTo(disposeBag)
+}
+/*:
+ ----
+ ## `single`
+ Emits only the first element (or the first element that meets a condition) emitted by an `Observable` sequence. Will throw an error if the `Observable` sequence does not emit exactly one element.
+ */
+example("single") {
+    let disposeBag = DisposeBag()
+    
+    Observable.of("🐱", "🐰", "🐶", "🐸", "🐷", "🐵")
+        .single()
+        .subscribe(onNext: { print($0) })
+        .addDisposableTo(disposeBag)
+}
+
+example("single with conditions") {
+    let disposeBag = DisposeBag()
+    
+    Observable.of("🐱", "🐰", "🐶", "🐸", "🐷", "🐵")
+        .single { $0 == "🐸" }
+        .subscribe { print($0) }
+        .addDisposableTo(disposeBag)
+    
+    Observable.of("🐱", "🐰", "🐶", "🐱", "🐰", "🐶")
+        .single { $0 == "🐰" }
+        .subscribe { print($0) }
+        .addDisposableTo(disposeBag)
+    
+    Observable.of("🐱", "🐰", "🐶", "🐸", "🐷", "🐵")
+        .single { $0 == "🔵" }
+        .subscribe { print($0) }
+        .addDisposableTo(disposeBag)
+}
+/*:
+ ----
+ ## `take`
+ Emits only the specified number of elements from the beginning of an `Observable` sequence. [More info](http://reactivex.io/documentation/operators/take.html)
+ ![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/take.png)
+ */
+example("take") {
+    let disposeBag = DisposeBag()
+    
+    Observable.of("🐱", "🐰", "🐶", "🐸", "🐷", "🐵")
+        .take(3)
+        .subscribe(onNext: { print($0) })
+        .addDisposableTo(disposeBag)
+}
+/*:
+ ----
+ ## `takeLast`
+ Emits only the specified number of elements from the end of an `Observable` sequence. [More info](http://reactivex.io/documentation/operators/takelast.html)
+ ![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/takelast.png)
+ */
+example("takeLast") {
+    let disposeBag = DisposeBag()
+    
+    Observable.of("🐱", "🐰", "🐶", "🐸", "🐷", "🐵")
+        .takeLast(3)
+        .subscribe(onNext: { print($0) })
+        .addDisposableTo(disposeBag)
+}
+/*:
+ ----
+ ## `takeWhile`
+ Emits elements from the beginning of an `Observable` sequence as long as the specified condition evaluates to `true`. [More info](http://reactivex.io/documentation/operators/takewhile.html)
+ ![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/takewhile.png)
+ */
+example("takeWhile") {
+    let disposeBag = DisposeBag()
+    
+    Observable.of(1, 2, 3, 4, 5, 6)
+        .takeWhile { $0 < 4 }
+        .subscribe(onNext: { print($0) })
+        .addDisposableTo(disposeBag)
+}
+/*:
+ ----
+ ## `takeUntil`
+ Emits elements from a source `Observable` sequence until a reference `Observable` sequence emits an element. [More info](http://reactivex.io/documentation/operators/takeuntil.html)
+ ![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/takeuntil.png)
+ */
+example("takeUntil") {
+    let disposeBag = DisposeBag()
+    
+    let sourceSequence = PublishSubject<String>()
+    let referenceSequence = PublishSubject<String>()
+    
+    sourceSequence
+        .takeUntil(referenceSequence)
+        .subscribe { print($0) }
+        .addDisposableTo(disposeBag)
+    
+    sourceSequence.onNext("🐱")
+    sourceSequence.onNext("🐰")
+    sourceSequence.onNext("🐶")
+    
+    referenceSequence.onNext("🔴")
+    
+    sourceSequence.onNext("🐸")
+    sourceSequence.onNext("🐷")
+    sourceSequence.onNext("🐵")
+}
+/*:
+ ----
+ ## `skip`
+ Suppresses emitting the specified number of elements from the beginning of an `Observable` sequence. [More info](http://reactivex.io/documentation/operators/skip.html)
+ ![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/skip.png)
+ */
+example("skip") {
+    let disposeBag = DisposeBag()
+    
+    Observable.of("🐱", "🐰", "🐶", "🐸", "🐷", "🐵")
+        .skip(2)
+        .subscribe(onNext: { print($0) })
+        .addDisposableTo(disposeBag)
+}
+/*:
+ ----
+ ## `skipWhile`
+ Suppresses emitting the elements from the beginning of an `Observable` sequence that meet the specified condition. [More info](http://reactivex.io/documentation/operators/skipwhile.html)
+ ![](http://reactivex.io/documentation/operators/images/skipWhile.c.png)
+ */
+example("skipWhile") {
+    let disposeBag = DisposeBag()
+    
+    Observable.of(1, 2, 3, 4, 5, 6)
+        .skipWhile { $0 < 4 }
+        .subscribe(onNext: { print($0) })
+        .addDisposableTo(disposeBag)
+}
+/*:
+ ----
+ ## `skipWhileWithIndex`
+ Suppresses emitting the elements from the beginning of an `Observable` sequence that meet the specified condition, and emits the remaining elements. The closure is also passed each element's index.
+ */
+example("skipWhileWithIndex") {
+    let disposeBag = DisposeBag()
+    
+    Observable.of("🐱", "🐰", "🐶", "🐸", "🐷", "🐵")
+        .skipWhileWithIndex { element, index in
+            index < 3
+        }
+        .subscribe(onNext: { print($0) })
+        .addDisposableTo(disposeBag)
+}
+/*:
+ ----
+ ## `skipUntil`
+ Suppresses emitting the elements from a source `Observable` sequence until a reference `Observable` sequence emits an element. [More info](http://reactivex.io/documentation/operators/skipuntil.html)
+ ![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/skipuntil.png)
+ */
+example("skipUntil") {
+    let disposeBag = DisposeBag()
+    
+    let sourceSequence = PublishSubject<String>()
+    let referenceSequence = PublishSubject<String>()
+    
+    sourceSequence
+        .skipUntil(referenceSequence)
+        .subscribe(onNext: { print($0) })
+        .addDisposableTo(disposeBag)
+    
+    sourceSequence.onNext("🐱")
+    sourceSequence.onNext("🐰")
+    sourceSequence.onNext("🐶")
+    
+    referenceSequence.onNext("🔴")
+    
+    sourceSequence.onNext("🐸")
+    sourceSequence.onNext("🐷")
+    sourceSequence.onNext("🐵")
+}
+
+//: [Next](@next) - [Table of Contents](Table_of_Contents)

Rx.playground/Pages/Index.xcplaygroundpage/Contents.swift

@@ -1,27 +0,0 @@
-
-/*:
-> # IMPORTANT: To use `Rx.playground`, please:
-
-1. Open `Rx.xcworkspace`
-2. Build `RxSwift-OSX` scheme
-3. And then open `Rx` playground in `Rx.xcworkspace` tree view.
-4. Choose `View > Show Debug Area`
-*/
-
-/*:
-## Index:
-
-1. [Introduction](Introduction)
-1. [Subjects](Subjects)
-1. [Transforming Observables](Transforming_Observables)
-1. [Filtering Observables](Filtering_Observables)
-1. [Combining Observables](Combining_Observables)
-1. [Error Handling Operators](Error_Handling_Operators)
-1. [Observable Utility Operators](Observable_Utility_Operators)
-1. [Conditional and Boolean Operators](Conditional_and_Boolean_Operators)
-1. [Mathematical and Aggregate Operators](Mathematical_and_Aggregate_Operators)
-1. [Connectable Observable Operators](Connectable_Observable_Operators)
-
-*/
-
-//: [Index](Index) - [Next >>](@next)

Rx.playground/Pages/Introduction.xcplaygroundpage/Contents.swift

@@ -1,198 +1,85 @@
 /*:
-> # IMPORTANT: To use `Rx.playground`, please:
-
-1. Open `Rx.xcworkspace`
-2. Build `RxSwift-OSX` scheme
-3. And then open `Rx` playground in `Rx.xcworkspace` tree view.
-4. Choose `View > Show Debug Area`
-*/
-
-//: [<< Index](@previous)
+ > # IMPORTANT: To use **Rx.playground**:
+ 1. Open **Rx.xcworkspace**.
+ 1. Build the **RxSwift-OSX** scheme (**Product** → **Build**).
+ 1. Open **Rx** playground in the **Project navigator**.
+ 1. Show the Debug Area (**View** → **Debug Area** → **Show Debug Area**).
+ ----
+ [Previous](@previous)
+ */
 
 import RxSwift
-import Foundation
 
 /*:
 # Introduction
 
 ## Why use RxSwift?
 
-A vast majority of the code we write revolves around responding to external actions. When a user manipulates a control, we need to write an @IBAction to respond to that. We need to observe Notifications to detect when the keyboard changes position. We must provide blocks to execute when URL Sessions respond with data. And we use KVO to detect changes in variables.
+A vast majority of the code we write involves responding to external events. When a user manipulates a control, we need to write an `@IBAction` handler to respond. We need to observe notifications to detect when the keyboard changes position. We must provide closures to execute when URL sessions respond with data. And we use KVO to detect changes to variables.
 All of these various systems makes our code needlessly complex. Wouldn't it be better if there was one consistent system that handled all of our call/response code? Rx is such a system.
-
-## Observables
-The key to understanding RxSwift is in understanding the notion of Observables. Creating them, manipulating them, and subscribing to them in order to react to changes.
-
-## Creating and Subscribing to Observables
-The first step in understanding this library is in understanding how to create Observables. There are a number of functions available to make Observables.
-Creating an Observable is one thing, but if nothing subscribes to the observable, then nothing will come of it so both are explained simultaneously.
+ 
+ RxSwift is the official implementation of [Reactive Extensions](http://reactivex.io) (aka Rx), which exist for [most major languages and platforms](http://reactivex.io/languages.html).
 */
-
 /*:
-### empty
-`empty` creates an empty sequence. The only message it sends is the `.Completed` message.
-*/
-
-example("empty") {
-    let emptySequence = Observable<Int>.empty()
-
-    let subscription = emptySequence
-        .subscribe { event in
-            print(event)
-        }
-}
-
+ ## Concepts
+ 
+ **Every `Observable` instance is just a sequence.**
+ 
+ The key advantage for an `Observable` sequence vs. Swift's `SequenceType` is that it can also receive elements asynchronously. _This is the essence of RxSwift._ Everything else expands upon this concept.
 
+ * An `Observable` (`ObservableType`) is equivalent to a `SequenceType`.
+ * The `ObservableType.subscribe(_:)` method is equivalent to `SequenceType.generate()`.
+ * `ObservableType.subscribe(_:)` takes an observer (`ObserverType`) parameter, which will be subscribed to automatically receive sequence events and elements emitted by the `Observable`, instead of manually calling `next()` on the returned generator.
+ */
 /*:
-### never
-`never` creates a sequence that never sends any element or completes.
+ If an `Observable` emits a next event (`Event.next(Element)`), it can continue to emit more events. However, if the `Observable` emits either an error event (`Event.error(ErrorType)`) or a completed event (`Event.completed`), the `Observable` sequence cannot emit additional events to the subscriber.
+
+ Sequence grammar explains this more concisely:
+
+ `next* (error | completed)?`
+
+ And this can also be explained more visually using diagrams:
+
+ `--1--2--3--4--5--6--|----> // "|" = Terminates normally`
+
+ `--a--b--c--d--e--f--X----> // "X" = Terminates with an error`
+
+ `--tap--tap----------tap--> // "|" = Continues indefinitely, such as a sequence of button taps`
+
+ > These diagrams are called marble diagrams. You can learn more about them at [RxMarbles.com](http://rxmarbles.com).
 */
-
-example("never") {
-    let neverSequence = Observable<Int>.never()
-
-    let subscription = neverSequence
-        .subscribe { _ in
-            print("This block is never called.")
-        }
-}
-
 /*:
-### just
-`just` represents sequence that contains one element. It sends two messages to subscribers. The first message is the value of single element and the second message is `.Completed`.
-*/
-
-example("just") {
-    let singleElementSequence = Observable.just(32)
-
-    let subscription = singleElementSequence
-        .subscribe { event in
-            print(event)
-        }
-}
-
-/*:
-### sequenceOf
-`sequenceOf` creates a sequence of a fixed number of elements.
-*/
-
-example("sequenceOf") {
-    let sequenceOfElements/* : Observable<Int> */ = Observable.of(0, 1, 2, 3, 4, 5, 6, 7, 8, 9)
-    
-    let subscription = sequenceOfElements
-        .subscribe { event in
-            print(event)
-        }
-}
-
-/*:
-### from
-`from` creates a sequence from `SequenceType`
-*/
-
-example("toObservable") {
-    let sequenceFromArray = [1, 2, 3, 4, 5].toObservable()
-
-    let subscription = sequenceFromArray
-        .subscribe { event in
-            print(event)
-        }
-}
-
-/*:
-### create
-`create` creates sequence using Swift closure. This examples creates custom version of `just` operator.
-*/
-
-example("create") {
-    let myJust = { (singleElement: Int) -> Observable<Int> in
-        return Observable.create { observer in
-            observer.on(.Next(singleElement))
-            observer.on(.Completed)
-            
-            return NopDisposable.instance
-        }
+ ### Observables and observers (aka subscribers)
+ 
+ `Observable`s will not execute their subscription closure unless there is a subscriber. In the following example, the closure of the `Observable` will never be executed, because there are no subscribers:
+ */
+example("Observable with no subscribers") {
+    _ = Observable<String>.create { observerOfString -> Disposable in
+        print("This will never be printed")
+        observerOfString.on(.next("😬"))
+        observerOfString.on(.completed)
+        return Disposables.create()
     }
-    
-    let subscription = myJust(5)
-        .subscribe { event in
-            print(event)
-        }
 }
-
 /*:
-### generate
-`generate` creates sequence that generates its values and determines when to terminate based on its previous values.
-*/
-
-example("generate") {
-    let generated = Observable.generate(
-        initialState: 0,
-        condition: { $0 < 3 },
-        iterate: { $0 + 1 }
-    )
-
-    let subscription = generated
-        .subscribe { event in
-            print(event)
+ ----
+ In the following example, the closure will be executed when `subscribe(_:)` is called:
+ */
+example("Observable with subscriber") {
+  _ = Observable<String>.create { observerOfString in
+            print("Observable created")
+            observerOfString.on(.next("😉"))
+            observerOfString.on(.completed)
+            return Disposables.create()
         }
-}
-
-/*:
-### failWith
-create an Observable that emits no items and terminates with an error
-*/
-
-example("failWith") {
-    let error = NSError(domain: "Test", code: -1, userInfo: nil)
-    
-    let erroredSequence = Observable<Int>.error(error)
-    
-    let subscription = erroredSequence
-        .subscribe { event in
-            print(event)
-        }
-}
-
-/*:
-### `deferred`
-
-do not create the Observable until the observer subscribes, and create a fresh Observable for each observer
-
-![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/defer.png)
-
-[More info in reactive.io website]( http://reactivex.io/documentation/operators/defer.html )
-*/
-example("deferred") {
-    let deferredSequence: Observable<Int> = Observable.deferred {
-        print("creating")
-        return Observable.create { observer in
-            print("emmiting")
-            observer.on(.Next(0))
-            observer.on(.Next(1))
-            observer.on(.Next(2))
-
-            return NopDisposable.instance
-        }
-    }
-
-    _ = deferredSequence
         .subscribe { event in
             print(event)
     }
-
-    _ = deferredSequence
-        .subscribe { event in
-            print(event)
-        }
 }
-
 /*:
-There is a lot more useful methods in the RxCocoa library, so check them out: 
-* `rx_observe` exist on every NSObject and wraps KVO.
-* `rx_tap` exists on buttons and wraps @IBActions
-* `rx_notification` wraps NotificationCenter events
-* ... and many others
-*/
+ > Don't concern yourself with the details of how these `Observable`s were created in these examples. We'll get into that [next](@next).
+ #
+ > `subscribe(_:)` returns a `Disposable` instance that represents a disposable resource such as a subscription. It was ignored in the previous simple example, but it should normally be properly handled. This usually means adding it to a `DisposeBag` instance. All examples going forward will include proper handling, because, well, practice makes _permanent_ 🙂. You can learn more about this in the [Disposing section](https://github.com/ReactiveX/RxSwift/blob/master/Documentation/GettingStarted.md#disposing) of the [Getting Started guide](https://github.com/ReactiveX/RxSwift/blob/master/Documentation/GettingStarted.md).
+ */
 
-//: [Index](Index) - [Next >>](@next)
+//: [Next](@next) - [Table of Contents](Table_of_Contents)

Rx.playground/Pages/Mathematical_and_Aggregate_Operators.xcplaygroundpage/Contents.swift

@@ -1,86 +1,72 @@
 /*:
-> # IMPORTANT: To use `Rx.playground`, please:
-
-1. Open `Rx.xcworkspace`
-2. Build `RxSwift-OSX` scheme
-3. And then open `Rx` playground in `Rx.xcworkspace` tree view.
-4. Choose `View > Show Debug Area`
-*/
-
-//: [<< Previous](@previous) - [Index](Index)
-
+ > # IMPORTANT: To use **Rx.playground**:
+ 1. Open **Rx.xcworkspace**.
+ 1. Build the **RxSwift-OSX** scheme (**Product** → **Build**).
+ 1. Open **Rx** playground in the **Project navigator**.
+ 1. Show the Debug Area (**View** → **Debug Area** → **Show Debug Area**).
+ ----
+ [Previous](@previous) - [Table of Contents](Table_of_Contents)
+ */
 import RxSwift
-
 /*:
-## Mathematical and Aggregate Operators
-
-Operators that operate on the entire sequence of items emitted by an Observable
-
-*/
-
-/*:
-### `concat`
-
-Emit the emissions from two or more Observables without interleaving them.
-
-![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/concat.png)
-
-[More info in reactive.io website]( http://reactivex.io/documentation/operators/concat.html )
-*/
-example("concat") {
-    let var1 = BehaviorSubject(value: 0)
-    let var2 = BehaviorSubject(value: 200)
+ # Mathematical and Aggregate Operators
+ Operators that operate on the entire sequence of items emitted by an `Observable`.
+ ## `toArray`
+ Converts an `Observable` sequence into an array, emits that array as a new single-element `Observable` sequence, and then terminates. [More info](http://reactivex.io/documentation/operators/to.html)
+ ![](http://reactivex.io/documentation/operators/images/to.c.png)
+ */
+example("toArray") {
+    let disposeBag = DisposeBag()
     
-    // var3 is like an Observable<Observable<Int>>
-    let var3 = BehaviorSubject(value: var1)
-    
-    let d = var3
-        .concat()
-        .subscribe {
-            print($0)
-        }
-    
-    var1.on(.Next(1))
-    var1.on(.Next(2))
-    var1.on(.Next(3))
-    var1.on(.Next(4))
-    
-    var3.on(.Next(var2))
-    
-    var2.on(.Next(201))
-    
-    var1.on(.Next(5))
-    var1.on(.Next(6))
-    var1.on(.Next(7))
-    var1.on(.Completed)
-    
-    var2.on(.Next(202))
-    var2.on(.Next(203))
-    var2.on(.Next(204))
+    Observable.range(start: 1, count: 10)
+        .toArray()
+        .subscribe { print($0) }
+        .addDisposableTo(disposeBag)
 }
-
-
 /*:
-
-
-### `reduce`
-
-Apply a function to each item emitted by an Observable, sequentially, and emit the final value.
-This function will perform a function on each element in the sequence until it is completed, then send a message with the aggregate value. It works much like the Swift `reduce` function works on sequences.
-
-![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/reduce.png)
-
-[More info in reactive.io website]( http://reactivex.io/documentation/operators/reduce.html )
-
-*/
+ ----
+ ## `reduce`
+ Begins with an initial seed value, and then applies an accumulator closure to all elements emitted by an `Observable` sequence, and returns the aggregate result as a single-element `Observable` sequence. [More info](http://reactivex.io/documentation/operators/reduce.html)
+ ![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/reduce.png)
+ */
 example("reduce") {
-    _ = Observable.of(0, 1, 2, 3, 4, 5, 6, 7, 8, 9)
-        .reduce(0, accumulator: +)
-        .subscribe {
-            print($0)
-        }
+    let disposeBag = DisposeBag()
+    
+    Observable.of(10, 100, 1000)
+        .reduce(1, accumulator: +)
+        .subscribe(onNext: { print($0) })
+        .addDisposableTo(disposeBag)
+}
+/*:
+ ----
+ ## `concat`
+ Joins elements from inner `Observable` sequences of an `Observable` sequence in a sequential manner, waiting for each sequence to terminate successfully before emitting elements from the next sequence. [More info](http://reactivex.io/documentation/operators/concat.html)
+ ![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/concat.png)
+ */
+example("concat") {
+    let disposeBag = DisposeBag()
+    
+    let subject1 = BehaviorSubject(value: "🍎")
+    let subject2 = BehaviorSubject(value: "🐶")
+    
+    let variable = Variable(subject1)
+    
+    variable.asObservable()
+        .concat()
+        .subscribe { print($0) }
+        .addDisposableTo(disposeBag)
+    
+    subject1.onNext("🍐")
+    subject1.onNext("🍊")
+    
+    variable.value = subject2
+    
+    subject2.onNext("I would be ignored")
+    subject2.onNext("🐱")
+    
+    subject1.onCompleted()
+    
+    subject2.onNext("🐭")
 }
 
-
-
-//: [Index](Index) - [Next >>](@next)
+//: [Next](@next) - [Table of Contents](Table_of_Contents)

Rx.playground/Pages/Observable_Utility_Operators.xcplaygroundpage/Contents.swift

@@ -1,122 +0,0 @@
-/*:
-> # IMPORTANT: To use `Rx.playground`, please:
-
-1. Open `Rx.xcworkspace`
-2. Build `RxSwift-OSX` scheme
-3. And then open `Rx` playground in `Rx.xcworkspace` tree view.
-4. Choose `View > Show Debug Area`
-*/
-
-//: [<< Previous](@previous) - [Index](Index)
-
-import RxSwift
-import Foundation
-/*:
-## Observable Utility Operators
-
-A toolbox of useful Operators for working with Observables.
-
-*/
-
-/*:
-### `subscribe`
-
-[More info in reactive.io website]( http://reactivex.io/documentation/operators/subscribe.html )
-*/
-
-example("subscribe") {
-    let sequenceOfInts = PublishSubject<Int>()
-
-    _ = sequenceOfInts
-        .subscribe {
-            print($0)
-        }
-
-    sequenceOfInts.on(.Next(1))
-    sequenceOfInts.on(.Completed)
-}
-
-
-/*:
-There are several variants of the `subscribe` operator.
-*/
-
-/*:
-
-### `subscribeNext`
-
-*/
-example("subscribeNext") {
-    let sequenceOfInts = PublishSubject<Int>()
-
-    _ = sequenceOfInts
-        .subscribeNext {
-            print($0)
-        }
-
-    sequenceOfInts.on(.Next(1))
-    sequenceOfInts.on(.Completed)
-}
-
-
-/*:
-
-### `subscribeCompleted`
-
-*/
-example("subscribeCompleted") {
-    let sequenceOfInts = PublishSubject<Int>()
-
-    _ = sequenceOfInts
-        .subscribeCompleted {
-            print("It's completed")
-        }
-
-    sequenceOfInts.on(.Next(1))
-    sequenceOfInts.on(.Completed)
-}
-
-
-/*:
-
-### `subscribeError`
-
-*/
-example("subscribeError") {
-    let sequenceOfInts = PublishSubject<Int>()
-
-    _ = sequenceOfInts
-        .subscribeError { error in
-            print(error)
-        }
-
-    sequenceOfInts.on(.Next(1))
-    sequenceOfInts.on(.Error(NSError(domain: "Examples", code: -1, userInfo: nil)))
-}
-
-
-/*:
-### `doOn`
-
-register an action to take upon a variety of Observable lifecycle events
-
-![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/do.png)
-
-[More info in reactive.io website]( http://reactivex.io/documentation/operators/do.html )
-*/
-example("doOn") {
-    let sequenceOfInts = PublishSubject<Int>()
-
-    _ = sequenceOfInts
-        .doOn {
-            print("Intercepted event \($0)")
-        }
-        .subscribe {
-            print($0)
-        }
-
-    sequenceOfInts.on(.Next(1))
-    sequenceOfInts.on(.Completed)
-}
-
-//: [Index](Index) - [Next >>](@next)

Rx.playground/Pages/Subjects.xcplaygroundpage/Contents.swift

@@ -1,113 +0,0 @@
-/*:
-> # IMPORTANT: To use `Rx.playground`, please:
-
-1. Open `Rx.xcworkspace`
-2. Build `RxSwift-OSX` scheme
-3. And then open `Rx` playground in `Rx.xcworkspace` tree view.
-4. Choose `View > Show Debug Area`
-*/
-
-//: [<< Previous](@previous) - [Index](Index)
-
-import RxSwift
-
-/*:
-
-A Subject is a sort of bridge or proxy that is available in some implementations of ReactiveX that acts both as an observer and as an Observable. Because it is an observer, it can subscribe to one or more Observables, and because it is an Observable, it can pass through the items it observes by reemitting them, and it can also emit new items.
-*/
-
-func writeSequenceToConsole<O: ObservableType>(name: String, sequence: O) -> Disposable {
-    return sequence
-        .subscribe { e in
-            print("Subscription: \(name), event: \(e)")
-        }
-}
-
-
-/*:
-
-## PublishSubject
-
-`PublishSubject` emits to an observer only those items that are emitted by the source Observable(s) subsequent to the time of the subscription.
-
-![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/publishsubject.png)
-
-![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/publishsubject_error.png)
-
-*/
-example("PublishSubject") {
-    let disposeBag = DisposeBag()
-
-    let subject = PublishSubject<String>()
-    writeSequenceToConsole("1", sequence: subject).addDisposableTo(disposeBag)
-    subject.on(.Next("a"))
-    subject.on(.Next("b"))
-    writeSequenceToConsole("2", sequence: subject).addDisposableTo(disposeBag)
-    subject.on(.Next("c"))
-    subject.on(.Next("d"))
-}
-
-
-/*:
-
-## ReplaySubject
-
-`ReplaySubject` emits to any observer all of the items that were emitted by the source Observable(s), regardless of when the observer subscribes.
-
-![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/replaysubject.png)
-*/
-example("ReplaySubject") {
-    let disposeBag = DisposeBag()
-    let subject = ReplaySubject<String>.create(bufferSize: 1)
-
-    writeSequenceToConsole("1", sequence: subject).addDisposableTo(disposeBag)
-    subject.on(.Next("a"))
-    subject.on(.Next("b"))
-    writeSequenceToConsole("2", sequence: subject).addDisposableTo(disposeBag)
-    subject.on(.Next("c"))
-    subject.on(.Next("d"))
-}
-
-
-/*:
-
-## BehaviorSubject
-
-When an observer subscribes to a `BehaviorSubject`, it begins by emitting the item most recently emitted by the source Observable (or a seed/default value if none has yet been emitted) and then continues to emit any other items emitted later by the source Observable(s).
-
-![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/behaviorsubject.png)
-
-![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/behaviorsubject_error.png)
-*/
-example("BehaviorSubject") {
-    let disposeBag = DisposeBag()
-
-    let subject = BehaviorSubject(value: "z")
-    writeSequenceToConsole("1", sequence: subject).addDisposableTo(disposeBag)
-    subject.on(.Next("a"))
-    subject.on(.Next("b"))
-    writeSequenceToConsole("2", sequence: subject).addDisposableTo(disposeBag)
-    subject.on(.Next("c"))
-    subject.on(.Next("d"))
-    subject.on(.Completed)
-}
-
-/*:
-
-## Variable
-
-`Variable` wraps `BehaviorSubject`. Advantage of using variable over `BehaviorSubject` is that variable can never explicitly complete or error out, and `BehaviorSubject` can in case `Error` or `Completed` message is send to it. `Variable` will also automatically complete in case it's being deallocated.
-
-*/
-example("Variable") {
-    let disposeBag = DisposeBag()
-    let variable = Variable("z")
-    writeSequenceToConsole("1", sequence: variable.asObservable()).addDisposableTo(disposeBag)
-    variable.value = "a"
-    variable.value = "b"
-    writeSequenceToConsole("2", sequence: variable.asObservable()).addDisposableTo(disposeBag)
-    variable.value = "c"
-    variable.value = "d"
-}
-
-//: [Index](Index) - [Next >>](@next)

Rx.playground/Pages/Table_of_Contents.xcplaygroundpage/Contents.swift

@@ -0,0 +1,21 @@
+/*:
+ > # IMPORTANT: To use **Rx.playground**:
+ 1. Open **Rx.xcworkspace**.
+ 1. Build the **RxSwift-OSX** scheme (**Product** → **Build**).
+ 1. Open **Rx** playground in the **Project navigator**.
+ 1. Show the Debug Area (**View** → **Debug Area** → **Show Debug Area**).
+ ----
+ ## Table of Contents:
+ 1. [Introduction](Introduction)
+ 1. [Creating and Subscribing to Observables](Creating_and_Subscribing_to_Observables)
+ 1. [Working with Subjects](Working_with_Subjects)
+ 1. [Combining Operators](Combining_Operators)
+ 1. [Transforming Operators](Transforming_Operators)
+ 1. [Filtering and Conditional Operators](Filtering_and_Conditional_Operators)
+ 1. [Mathematical and Aggregate Operators](Mathematical_and_Aggregate_Operators)
+ 1. [Connectable Operators](Connectable_Operators)
+ 1. [Error Handling Operators](Error_Handling_Operators)
+ 1. [Debugging Operators](Debugging_Operators)
+ */
+
+//: [Next](@next)

Rx.playground/Pages/Transforming_Observables.xcplaygroundpage/Contents.swift

@@ -1,88 +0,0 @@
-/*:
-> # IMPORTANT: To use `Rx.playground`, please:
-
-1. Open `Rx.xcworkspace`
-2. Build `RxSwift-OSX` scheme
-3. And then open `Rx` playground in `Rx.xcworkspace` tree view.
-4. Choose `View > Show Debug Area`
-*/
-
-//: [<< Previous](@previous) - [Index](Index)
-
-import RxSwift
-
-/*:
-## Transforming Observables
-
-Operators that transform items that are emitted by an Observable.
-*/
-
-/*:
-### `map` / `select`
-
-Transform the items emitted by an Observable by applying a function to each item
-
-![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/map.png)
-
-[More info in reactive.io website]( http://reactivex.io/documentation/operators/map.html )
-*/
-
-example("map") {
-    let originalSequence = Observable.of(1, 2, 3)
-
-    _ = originalSequence
-        .map { number in
-            number * 2
-        }
-        .subscribe { print($0) }
-}
-
-
-/*:
-### `flatMap`
-
-Transform the items emitted by an Observable into Observables, then flatten the emissions from those into a single Observable
-
-![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/flatmap.png)
-
-[More info in reactive.io website]( http://reactivex.io/documentation/operators/flatmap.html )
-*/
-example("flatMap") {
-    let sequenceInt = Observable.of(1, 2, 3)
-
-    let sequenceString = Observable.of("A", "B", "C", "D", "E", "F", "--")
-
-    _ = sequenceInt
-        .flatMap { (x:Int) -> Observable<String> in
-            print("from sequenceInt \(x)")
-            return sequenceString
-        }
-        .subscribe {
-            print($0)
-        }
-}
-
-
-/*:
-### `scan`
-
-Apply a function to each item emitted by an Observable, sequentially, and emit each successive value
-
-![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/scan.png)
-
-[More info in reactive.io website]( http://reactivex.io/documentation/operators/scan.html )
-*/
-example("scan") {
-    let sequenceToSum = Observable.of(0, 1, 2, 3, 4, 5)
-
-    _ = sequenceToSum
-        .scan(0) { acum, elem in
-            acum + elem
-        }
-        .subscribe {
-            print($0)
-        }
-}
-
-
-//: [Index](Index) - [Next >>](@next)

Rx.playground/Pages/Transforming_Operators.xcplaygroundpage/Contents.swift

@@ -0,0 +1,78 @@
+/*:
+ > # IMPORTANT: To use **Rx.playground**:
+ 1. Open **Rx.xcworkspace**.
+ 1. Build the **RxSwift-OSX** scheme (**Product** → **Build**).
+ 1. Open **Rx** playground in the **Project navigator**.
+ 1. Show the Debug Area (**View** → **Debug Area** → **Show Debug Area**).
+ ----
+ [Previous](@previous) - [Table of Contents](Table_of_Contents)
+ */
+import RxSwift
+/*:
+# Transforming Operators
+Operators that transform Next event elements emitted by an `Observable` sequence.
+## `map`
+ Applies a transforming closure to elements emitted by an `Observable` sequence, and returns a new `Observable` sequence of the transformed elements. [More info](http://reactivex.io/documentation/operators/map.html)
+![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/map.png)
+*/
+example("map") {
+    let disposeBag = DisposeBag()
+    Observable.of(1, 2, 3)
+        .map { $0 * $0 }
+        .subscribe(onNext: { print($0) })
+        .addDisposableTo(disposeBag)
+}
+/*:
+ ----
+ ## `flatMap` and `flatMapLatest`
+ Transforms the elements emitted by an `Observable` sequence into `Observable` sequences, and merges the emissions from both `Observable` sequences into a single `Observable` sequence. This is also useful when, for example, when you have an `Observable` sequence that itself emits `Observable` sequences, and you want to be able to react to new emissions from either `Observable` sequence. The difference between `flatMap` and `flatMapLatest` is, `flatMapLatest` will only emit elements from the most recent inner `Observable` sequence. [More info](http://reactivex.io/documentation/operators/flatmap.html)
+ ![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/flatmap.png)
+ */
+example("flatMap and flatMapLatest") {
+    let disposeBag = DisposeBag()
+    
+    struct Player {
+        var score: Variable<Int>
+    }
+    
+    let 👦🏻 = Player(score: Variable(80))
+    let 👧🏼 = Player(score: Variable(90))
+    
+    let player = Variable(👦🏻)
+    
+    player.asObservable()
+        .flatMap { $0.score.asObservable() } // Change flatMap to flatMapLatest and observe change in printed output
+        .subscribe(onNext: { print($0) })
+        .addDisposableTo(disposeBag)
+    
+    👦🏻.score.value = 85
+    
+    player.value = 👧🏼
+    
+    👦🏻.score.value = 95 // Will be printed when using flatMap, but will not be printed when using flatMapLatest
+    
+    👧🏼.score.value = 100
+}
+/*:
+ > In this example, using `flatMap` may have unintended consequences. After assigning 👧🏼 to `player.value`, `👧🏼.score` will begin to emit elements, but the previous inner `Observable` sequence (`👦🏻.score`) will also still emit elements. By changing `flatMap` to `flatMapLatest`, only the most recent inner `Observable` sequence (`👧🏼.score`) will emit elements, i.e., setting `👦🏻.score.value` to `95` has no effect.
+ #
+ > `flatMapLatest` is actually a combination of the `map` and `switchLatest` operators.
+ */
+/*:
+ ----
+ ## `scan`
+ Begins with an initial seed value, and then applies an accumulator closure to each element emitted by an `Observable` sequence, and returns each intermediate result as a single-element `Observable` sequence. [More info](http://reactivex.io/documentation/operators/scan.html)
+ ![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/scan.png)
+ */
+example("scan") {
+    let disposeBag = DisposeBag()
+    
+    Observable.of(10, 100, 1000)
+        .scan(1) { aggregateValue, newValue in
+            aggregateValue + newValue
+        }
+        .subscribe(onNext: { print($0) })
+        .addDisposableTo(disposeBag)
+}
+
+//: [Next](@next) - [Table of Contents](Table_of_Contents)

Rx.playground/Pages/Working_with_Subjects.xcplaygroundpage/Contents.swift

@@ -0,0 +1,110 @@
+/*:
+ > # IMPORTANT: To use **Rx.playground**:
+ 1. Open **Rx.xcworkspace**.
+ 1. Build the **RxSwift-OSX** scheme (**Product** → **Build**).
+ 1. Open **Rx** playground in the **Project navigator**.
+ 1. Show the Debug Area (**View** → **Debug Area** → **Show Debug Area**).
+ ----
+ [Previous](@previous) - [Table of Contents](Table_of_Contents)
+ */
+import RxSwift
+/*:
+ # Working with Subjects
+ A Subject is a sort of bridge or proxy that is available in some implementations of Rx that acts as both an observer and `Observable`. Because it is an observer, it can subscribe to one or more `Observable`s, and because it is an `Observable`, it can pass through the items it observes by reemitting them, and it can also emit new items. [More info](http://reactivex.io/documentation/subject.html)
+*/
+extension ObservableType {
+    
+    /**
+     Add observer with `id` and print each emitted event.
+     - parameter id: an identifier for the subscription.
+     */
+    func addObserver(_ id: String) -> Disposable {
+        return subscribe { print("Subscription:", id, "Event:", $0) }
+    }
+    
+}
+
+func writeSequenceToConsole<O: ObservableType>(name: String, sequence: O) -> Disposable {
+    return sequence.subscribe { event in
+        print("Subscription: \(name), event: \(event)")
+    }
+}
+/*:
+ ## PublishSubject
+ Broadcasts new events to all observers as of their time of the subscription.
+ ![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/publishsubject.png "PublishSubject")
+ */
+example("PublishSubject") {
+    let disposeBag = DisposeBag()
+    let subject = PublishSubject<String>()
+    
+    subject.addObserver("1").addDisposableTo(disposeBag)
+    subject.onNext("🐶")
+    subject.onNext("🐱")
+    
+    subject.addObserver("2").addDisposableTo(disposeBag)
+    subject.onNext("🅰️")
+    subject.onNext("🅱️")
+}
+/*:
+ > This example also introduces using the `onNext(_:)` convenience method, equivalent to `on(.next(_:)`, which causes a new Next event to be emitted to subscribers with the provided `element`. There are also `onError(_:)` and `onCompleted()` convenience methods, equivalent to `on(.error(_:))` and `on(.completed)`, respectively.
+ ----
+ ## ReplaySubject
+ Broadcasts new events to all subscribers, and the specified `bufferSize` number of previous events to new subscribers.
+ ![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/replaysubject.png)
+*/
+example("ReplaySubject") {
+    let disposeBag = DisposeBag()
+    let subject = ReplaySubject<String>.create(bufferSize: 1)
+    
+    subject.addObserver("1").addDisposableTo(disposeBag)
+    subject.onNext("🐶")
+    subject.onNext("🐱")
+    
+    subject.addObserver("2").addDisposableTo(disposeBag)
+    subject.onNext("🅰️")
+    subject.onNext("🅱️")
+}
+/*:
+ ----
+## BehaviorSubject
+Broadcasts new events to all subscribers, and the most recent (or initial) value to new subscribers.
+![](https://raw.githubusercontent.com/kzaher/rxswiftcontent/master/MarbleDiagrams/png/behaviorsubject.png)
+*/
+example("BehaviorSubject") {
+    let disposeBag = DisposeBag()
+    let subject = BehaviorSubject(value: "🔴")
+    
+    subject.addObserver("1").addDisposableTo(disposeBag)
+    subject.onNext("🐶")
+    subject.onNext("🐱")
+    
+    subject.addObserver("2").addDisposableTo(disposeBag)
+    subject.onNext("🅰️")
+    subject.onNext("🅱️")
+    
+    subject.addObserver("3").addDisposableTo(disposeBag)
+    subject.onNext("🍐")
+    subject.onNext("🍊")
+}
+/*:
+ > Notice what's missing in these previous examples? A Completed event. `PublishSubject`, `ReplaySubject`, and `BehaviorSubject` do not automatically emit Completed events when they are about to be disposed of.
+ ----
+ ## Variable
+ Wraps a `BehaviorSubject`, so it will emit the most recent (or initial) value to new subscribers. And `Variable` also maintains current value state. `Variable` will never emit an Error event. However, it will automatically emit a Completed event and terminate on `deinit`.
+*/
+example("Variable") {
+    let disposeBag = DisposeBag()
+    let variable = Variable("🔴")
+    
+    variable.asObservable().addObserver("1").addDisposableTo(disposeBag)
+    variable.value = "🐶"
+    variable.value = "🐱"
+    
+    variable.asObservable().addObserver("2").addDisposableTo(disposeBag)
+    variable.value = "🅰️"
+    variable.value = "🅱️"
+}
+//:  > Call `asObservable()` on a `Variable` instance in order to access its underlying `BehaviorSubject` sequence. `Variable`s do not implement the `on` operator (or, e.g., `onNext(_:)`), but instead expose a `value` property that can be used to get the current value, and also set a new value. Setting a new value will also add that value onto its underlying `BehaviorSubject` sequence.
+
+//: [Next](@next) - [Table of Contents](Table_of_Contents)

Rx.playground/Sources/SupportCode.swift

@@ -1,31 +1,47 @@
-
 import Foundation
 
-public func example(description: String, action: () -> ()) {
-    print("\n--- \(description) example ---")
+/**
+ Encloses each code example in its own scope. Prints a `description` header and then executes the `action` closure.
+ - parameter description: example description
+ - parameter action: `Void` closure
+ */
+public func example(_ description: String, action: (Void) -> Void) {
+    printExampleHeader(description)
     action()
 }
 
-public func delay(delay:Double, closure:()->()) {
-    dispatch_after(
-        dispatch_time(
-            DISPATCH_TIME_NOW,
-            Int64(delay * Double(NSEC_PER_SEC))
-        ),
-        dispatch_get_main_queue(), closure)
+public func printExampleHeader(_ description: String) {
+    print("\n--- \(description) example ---")
+}
+
+public enum TestError: Swift.Error {
+    case test
+}
+
+
+/**
+ Executes `closure` on main thread after `delay` seconds.
+ - parameter delay: time in seconds to wait before executing `closure`
+ - parameter closure: `Void` closure
+ */
+public func delay(_ delay: Double, closure: @escaping (Void) -> Void) {
+
+    let delayTime = DispatchTime.now() + DispatchTimeInterval.seconds(Int(delay))
+    DispatchQueue.main.asyncAfter(deadline: delayTime) {
+        closure()
+    }
 }
 
 #if NOT_IN_PLAYGROUND
-
-public func playgroundShouldContinueIndefinitely() {
-}
-
+    
+    public func playgroundShouldContinueIndefinitely() { }
+    
 #else
-
-import XCPlayground
-
-public func playgroundShouldContinueIndefinitely() {
-    XCPlaygroundPage.currentPage.needsIndefiniteExecution = true
-}
-
+    
+    import PlaygroundSupport
+    
+    public func playgroundShouldContinueIndefinitely() {
+        PlaygroundPage.current.needsIndefiniteExecution = true
+    }
+    
 #endif

Rx.playground/SupportCode.remap

@@ -0,0 +1,12 @@
+[
+ {
+  "file": "/Users/mo/Documents/OpenSource/RxSwift/Rx.playground/Sources/SupportCode.swift",
+  "offset": 276,
+  "remove": 9,
+ },
+ {
+  "file": "/Users/mo/Documents/OpenSource/RxSwift/Rx.playground/Sources/SupportCode.swift",
+  "offset": 733,
+  "text": "@escaping ",
+ }
+]

Rx.playground/contents.xcplayground

@@ -1,16 +1,17 @@
 <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
-<playground version='6.0' target-platform='osx' display-mode='raw'>
+<playground version='6.0' target-platform='osx' display-mode='raw' last-migration='0800'>
     <pages>
-        <page name='Index'/>
+        <page name='Table_of_Contents'/>
         <page name='Introduction'/>
-        <page name='Subjects'/>
-        <page name='Transforming_Observables'/>
-        <page name='Filtering_Observables'/>
-        <page name='Combining_Observables'/>
-        <page name='Error_Handling_Operators'/>
-        <page name='Observable_Utility_Operators'/>
-        <page name='Conditional_and_Boolean_Operators'/>
+        <page name='Creating_and_Subscribing_to_Observables'/>
+        <page name='Working_with_Subjects'/>
+        <page name='Combining_Operators'/>
+        <page name='Transforming_Operators'/>
+        <page name='Filtering_and_Conditional_Operators'/>
         <page name='Mathematical_and_Aggregate_Operators'/>
-        <page name='Connectable_Observable_Operators'/>
+        <page name='Connectable_Operators'/>
+        <page name='Error_Handling_Operators'/>
+        <page name='Debugging_Operators'/>
+        <page name='Enable_RxSwift.resourceCount'/>
     </pages>
 </playground>

Rx.xcodeproj/xcshareddata/xcschemes/RxBlocking-OSX.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0720"
+   LastUpgradeVersion = "0800"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

Rx.xcodeproj/xcshareddata/xcschemes/RxBlocking-iOS.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0720"
+   LastUpgradeVersion = "0800"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

Rx.xcodeproj/xcshareddata/xcschemes/RxBlocking-tvOS.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0720"
+   LastUpgradeVersion = "0800"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

Rx.xcodeproj/xcshareddata/xcschemes/RxBlocking-watchOS.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0720"
+   LastUpgradeVersion = "0800"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

Rx.xcodeproj/xcshareddata/xcschemes/RxCocoa-OSX.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0720"
+   LastUpgradeVersion = "0800"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

Rx.xcodeproj/xcshareddata/xcschemes/RxCocoa-iOS.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0720"
+   LastUpgradeVersion = "0800"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

Rx.xcodeproj/xcshareddata/xcschemes/RxCocoa-tvOS.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0720"
+   LastUpgradeVersion = "0800"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

Rx.xcodeproj/xcshareddata/xcschemes/RxCocoa-watchOS.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0720"
+   LastUpgradeVersion = "0800"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

Rx.xcodeproj/xcshareddata/xcschemes/RxSwift-OSX.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0720"
+   LastUpgradeVersion = "0800"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

Rx.xcodeproj/xcshareddata/xcschemes/RxSwift-iOS.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0720"
+   LastUpgradeVersion = "0800"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

Rx.xcodeproj/xcshareddata/xcschemes/RxSwift-tvOS.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0720"
+   LastUpgradeVersion = "0800"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

Rx.xcodeproj/xcshareddata/xcschemes/RxSwift-watchOS.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0720"
+   LastUpgradeVersion = "0800"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

Rx.xcodeproj/xcshareddata/xcschemes/RxTests-OSX.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0720"
+   LastUpgradeVersion = "0800"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

Rx.xcodeproj/xcshareddata/xcschemes/RxTests-iOS.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0720"
+   LastUpgradeVersion = "0800"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

Rx.xcodeproj/xcshareddata/xcschemes/RxTests-tvOS.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0720"
+   LastUpgradeVersion = "0800"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

Rx.xcworkspace/contents.xcworkspacedata

@@ -1,6 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Workspace
    version = "1.0">
+   <FileRef
+      location = "group:Rx.playground">
+   </FileRef>
    <FileRef
       location = "group:Package.swift">
    </FileRef>
@@ -10,6 +13,9 @@
    <FileRef
       location = "group:README.md">
    </FileRef>
+   <FileRef
+      location = "group:ISSUE_TEMPLATE.md">
+   </FileRef>
    <FileRef
       location = "group:CHANGELOG.md">
    </FileRef>
@@ -32,33 +38,8 @@
    <Group
       location = "group:scripts"
       name = "scripts">
-      <Group
-         location = "group:automation-tests"
-         name = "automation-tests">
-         <FileRef
-            location = "group:01_githubSignUp.js">
-         </FileRef>
-         <FileRef
-            location = "group:02_searchWikipedia.js">
-         </FileRef>
-         <FileRef
-            location = "group:03_masterDetail.js">
-         </FileRef>
-         <FileRef
-            location = "group:04_controlsTests.js">
-         </FileRef>
-         <FileRef
-            location = "group:05_reactivePartialUpdates.js">
-         </FileRef>
-         <FileRef
-            location = "group:common.js">
-         </FileRef>
-         <FileRef
-            location = "group:main.js">
-         </FileRef>
-      </Group>
       <FileRef
-         location = "group:automation-tests.sh">
+         location = "group:all-tests.sh">
       </FileRef>
       <FileRef
          location = "group:common.sh">
@@ -66,9 +47,6 @@
       <FileRef
          location = "group:/Users/kzaher/Projects/RxSwift/scripts/package-spm.swift">
       </FileRef>
-      <FileRef
-         location = "group:pre-release-tests.sh">
-      </FileRef>
       <FileRef
          location = "group:test-linux.sh">
       </FileRef>
@@ -103,9 +81,6 @@
       <FileRef
          location = "group:HotAndColdObservables.md">
       </FileRef>
-      <FileRef
-         location = "group:IssueTemplate.md">
-      </FileRef>
       <FileRef
          location = "group:Linux.md">
       </FileRef>
@@ -128,9 +103,6 @@
          location = "group:Warnings.md">
       </FileRef>
    </Group>
-   <FileRef
-      location = "group:Rx.playground">
-   </FileRef>
    <FileRef
       location = "group:Rx.xcodeproj">
    </FileRef>

RxBlocking.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = "RxBlocking"
-  s.version          = "2.3.1"
+  s.version          = "3.0.0.alpha.1"
   s.summary          = "RxSwift Blocking operatos"
   s.description      = <<-DESC
 Set of blocking operators for RxSwift. These operators are mostly intended for unit/integration tests
@@ -18,11 +18,11 @@ Waiting for observable sequence to complete before exiting command line applicat
   s.requires_arc          = true
 
   s.ios.deployment_target = '8.0'
-  s.osx.deployment_target = '10.9'
+  s.osx.deployment_target = '10.10'
   s.watchos.deployment_target = '2.0'
   s.tvos.deployment_target = '9.0'
 
   s.source_files          = 'RxBlocking/**/*.swift'
 
-  s.dependency 'RxSwift', '~> 2.3.1'
+  s.dependency 'RxSwift', '~> 3.0.0.alpha.1'
 end

RxBlocking/BlockingObservable+Operators.swift

@@ -22,7 +22,7 @@ extension BlockingObservable {
     public func toArray() throws -> [E] {
         var elements: [E] = Array<E>()
 
-        var error: ErrorType?
+        var error: Swift.Error?
 
         let lock = RunLoopLock()
 
@@ -30,17 +30,17 @@ extension BlockingObservable {
 
         lock.dispatch {
             d.disposable = self.source.subscribe { e in
-                if d.disposed {
+                if d.isDisposed {
                     return
                 }
                 switch e {
-                case .Next(let element):
+                case .next(let element):
                     elements.append(element)
-                case .Error(let e):
+                case .error(let e):
                     error = e
                     d.dispose()
                     lock.stop()
-                case .Completed:
+                case .completed:
                     d.dispose()
                     lock.stop()
                 }
@@ -70,7 +70,7 @@ extension BlockingObservable {
     public func first() throws -> E? {
         var element: E?
 
-        var error: ErrorType?
+        var error: Swift.Error?
 
         let d = SingleAssignmentDisposable()
 
@@ -78,17 +78,17 @@ extension BlockingObservable {
 
         lock.dispatch {
             d.disposable = self.source.subscribe { e in
-                if d.disposed {
+                if d.isDisposed {
                     return
                 }
 
                 switch e {
-                case .Next(let e):
+                case .next(let e):
                     if element == nil {
                         element = e
                     }
                     break
-                case .Error(let e):
+                case .error(let e):
                     error = e
                 default:
                     break
@@ -122,7 +122,7 @@ extension BlockingObservable {
     public func last() throws -> E? {
         var element: E?
 
-        var error: ErrorType?
+        var error: Swift.Error?
 
         let d = SingleAssignmentDisposable()
 
@@ -130,14 +130,14 @@ extension BlockingObservable {
 
         lock.dispatch {
             d.disposable = self.source.subscribe { e in
-                if d.disposed {
+                if d.isDisposed {
                     return
                 }
                 switch e {
-                case .Next(let e):
+                case .next(let e):
                     element = e
                     return
-                case .Error(let e):
+                case .error(let e):
                     error = e
                 default:
                     break
@@ -180,10 +180,10 @@ extension BlockingObservable {
      - parameter predicate: A function to test each source element for a condition.
      - returns: Returns the only element of an sequence that satisfies the condition in the predicate, and reports an error if there is not exactly one element in the sequence.
      */
-    public func single(predicate: (E) throws -> Bool) throws -> E? {
+    public func single(_ predicate: @escaping (E) throws -> Bool) throws -> E? {
         var element: E?
         
-        var error: ErrorType?
+        var error: Swift.Error?
         
         let d = SingleAssignmentDisposable()
         
@@ -191,11 +191,11 @@ extension BlockingObservable {
         
         lock.dispatch {
             d.disposable = self.source.subscribe { e in
-                if d.disposed {
+                if d.isDisposed {
                     return
                 }
                 switch e {
-                case .Next(let e):
+                case .next(let e):
                     do {
                         if try !predicate(e) {
                             return
@@ -203,7 +203,7 @@ extension BlockingObservable {
                         if element == nil {
                             element = e
                         } else {
-                            throw RxError.MoreThanOneElement
+                            throw RxError.moreThanOneElement
                         }
                     } catch (let err) {
                         error = err
@@ -211,11 +211,11 @@ extension BlockingObservable {
                         lock.stop()
                     }
                     return
-                case .Error(let e):
+                case .error(let e):
                     error = e
-                case .Completed:
+                case .completed:
                     if element == nil {
-                        error = RxError.NoElements
+                        error = RxError.noElements
                     }
                 }
 

RxBlocking/ObservableConvertibleType+Blocking.swift

@@ -17,8 +17,8 @@ extension ObservableConvertibleType {
 
     - returns: `BlockingObservable` version of `self`
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
     public func toBlocking() -> BlockingObservable<E> {
         return BlockingObservable(source: self.asObservable())
     }
-}
+}

RxBlocking/RunLoopLock.swift

@@ -29,7 +29,7 @@ typealias AtomicInt = Int32
 #endif
 
 class RunLoopLock {
-    let currentRunLoop: CFRunLoopRef
+    let currentRunLoop: CFRunLoop
 
     var calledRun: AtomicInt = 0
     var calledStop: AtomicInt = 0
@@ -38,12 +38,12 @@ class RunLoopLock {
         currentRunLoop = CFRunLoopGetCurrent()
     }
 
-    func dispatch(action: () -> ()) {
-        CFRunLoopPerformBlock(currentRunLoop, kCFRunLoopDefaultMode) {
+    func dispatch(_ action: @escaping () -> ()) {
+        CFRunLoopPerformBlock(currentRunLoop, CFRunLoopMode.defaultMode.rawValue) {
             if CurrentThreadScheduler.isScheduleRequired {
-                CurrentThreadScheduler.instance.schedule(()) { _ in
+                _ = CurrentThreadScheduler.instance.schedule(()) { _ in
                     action()
-                    return NopDisposable.instance
+                    return Disposables.create()
                 }
             }
             else {
@@ -57,7 +57,7 @@ class RunLoopLock {
         if AtomicIncrement(&calledStop) != 1 {
             return
         }
-        CFRunLoopPerformBlock(currentRunLoop, kCFRunLoopDefaultMode) {
+        CFRunLoopPerformBlock(currentRunLoop, CFRunLoopMode.defaultMode.rawValue) {
             CFRunLoopStop(self.currentRunLoop)
         }
         CFRunLoopWakeUp(currentRunLoop)

RxCocoa.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = "RxCocoa"
-  s.version          = "2.3.1"
+  s.version          = "3.0.0.alpha.1"
   s.summary          = "RxSwift Cocoa extensions"
   s.description      = <<-DESC
 * UI extensions
@@ -15,7 +15,7 @@ Pod::Spec.new do |s|
   s.requires_arc          = true
 
   s.ios.deployment_target = '8.0'
-  s.osx.deployment_target = '10.9'
+  s.osx.deployment_target = '10.10'
   s.watchos.deployment_target = '2.0'
   s.tvos.deployment_target = '9.0'
 
@@ -25,5 +25,5 @@ Pod::Spec.new do |s|
   s.watchos.source_files  = 'RxCocoa/iOS/**/*.swift'
   s.tvos.source_files     = 'RxCocoa/iOS/**/*.swift'
 
-  s.dependency 'RxSwift', '~> 2.3.1'
+  s.dependency 'RxSwift', '~> 3.0.0.alpha.1'
 end

RxCocoa/Common/CLLocationManager+Rx.swift

@@ -12,15 +12,15 @@ import RxSwift
 #endif
 
 
-extension CLLocationManager {
+extension Reactive where Base: CLLocationManager {
 
     /**
     Reactive wrapper for `delegate`.
 
     For more information take a look at `DelegateProxyType` protocol documentation.
     */
-    public var rx_delegate: DelegateProxy {
-        return proxyForObject(RxCLLocationManagerDelegateProxy.self, self)
+    public var delegate: DelegateProxy {
+        return RxCLLocationManagerDelegateProxy.proxyForObject(base)
     }
 
     // MARK: Responding to Location Events
@@ -28,8 +28,8 @@ extension CLLocationManager {
     /**
     Reactive wrapper for `delegate` message.
     */
-    public var rx_didUpdateLocations: Observable<[CLLocation]> {
-        return rx_delegate.observe(#selector(CLLocationManagerDelegate.locationManager(_:didUpdateLocations:)))
+    public var didUpdateLocations: Observable<[CLLocation]> {
+        return delegate.observe(#selector(CLLocationManagerDelegate.locationManager(_:didUpdateLocations:)))
             .map { a in
                 return try castOrThrow([CLLocation].self, a[1])
             }
@@ -38,8 +38,8 @@ extension CLLocationManager {
     /**
     Reactive wrapper for `delegate` message.
     */
-    public var rx_didFailWithError: Observable<NSError> {
-        return rx_delegate.observe(#selector(CLLocationManagerDelegate.locationManager(_:didFailWithError:)))
+    public var didFailWithError: Observable<NSError> {
+        return delegate.observe(#selector(CLLocationManagerDelegate.locationManager(_:didFailWithError:)))
             .map { a in
                 return try castOrThrow(NSError.self, a[1])
             }
@@ -49,8 +49,8 @@ extension CLLocationManager {
     /**
     Reactive wrapper for `delegate` message.
     */
-    public var rx_didFinishDeferredUpdatesWithError: Observable<NSError?> {
-        return rx_delegate.observe(#selector(CLLocationManagerDelegate.locationManager(_:didFinishDeferredUpdatesWithError:)))
+    public var didFinishDeferredUpdatesWithError: Observable<NSError?> {
+        return delegate.observe(#selector(CLLocationManagerDelegate.locationManager(_:didFinishDeferredUpdatesWithError:)))
             .map { a in
                 return try castOptionalOrThrow(NSError.self, a[1])
             }
@@ -64,8 +64,8 @@ extension CLLocationManager {
     /**
     Reactive wrapper for `delegate` message.
     */
-    public var rx_didPauseLocationUpdates: Observable<Void> {
-        return rx_delegate.observe(#selector(CLLocationManagerDelegate.locationManagerDidPauseLocationUpdates(_:)))
+    public var didPauseLocationUpdates: Observable<Void> {
+        return delegate.observe(#selector(CLLocationManagerDelegate.locationManagerDidPauseLocationUpdates(_:)))
             .map { _ in
                 return ()
             }
@@ -74,8 +74,8 @@ extension CLLocationManager {
     /**
     Reactive wrapper for `delegate` message.
     */
-    public var rx_didResumeLocationUpdates: Observable<Void> {
-        return rx_delegate.observe(#selector(CLLocationManagerDelegate.locationManagerDidResumeLocationUpdates(_:)))
+    public var didResumeLocationUpdates: Observable<Void> {
+        return delegate.observe( #selector(CLLocationManagerDelegate.locationManagerDidResumeLocationUpdates(_:)))
             .map { _ in
                 return ()
             }
@@ -86,8 +86,8 @@ extension CLLocationManager {
     /**
     Reactive wrapper for `delegate` message.
     */
-    public var rx_didUpdateHeading: Observable<CLHeading> {
-        return rx_delegate.observe(#selector(CLLocationManagerDelegate.locationManager(_:didUpdateHeading:)))
+    public var didUpdateHeading: Observable<CLHeading> {
+        return delegate.observe(#selector(CLLocationManagerDelegate.locationManager(_:didUpdateHeading:)))
             .map { a in
                 return try castOrThrow(CLHeading.self, a[1])
             }
@@ -98,8 +98,8 @@ extension CLLocationManager {
     /**
     Reactive wrapper for `delegate` message.
     */
-    public var rx_didEnterRegion: Observable<CLRegion> {
-        return rx_delegate.observe(#selector(CLLocationManagerDelegate.locationManager(_:didEnterRegion:)))
+    public var didEnterRegion: Observable<CLRegion> {
+        return delegate.observe(#selector(CLLocationManagerDelegate.locationManager(_:didEnterRegion:)))
             .map { a in
                 return try castOrThrow(CLRegion.self, a[1])
             }
@@ -108,8 +108,8 @@ extension CLLocationManager {
     /**
     Reactive wrapper for `delegate` message.
     */
-    public var rx_didExitRegion: Observable<CLRegion> {
-        return rx_delegate.observe(#selector(CLLocationManagerDelegate.locationManager(_:didExitRegion:)))
+    public var didExitRegion: Observable<CLRegion> {
+        return delegate.observe(#selector(CLLocationManagerDelegate.locationManager(_:didExitRegion:)))
             .map { a in
                 return try castOrThrow(CLRegion.self, a[1])
             }
@@ -123,11 +123,11 @@ extension CLLocationManager {
     Reactive wrapper for `delegate` message.
     */
     @available(OSX 10.10, *)
-    public var rx_didDetermineStateForRegion: Observable<(state: CLRegionState, region: CLRegion)> {
-        return rx_delegate.observe(#selector(CLLocationManagerDelegate.locationManager(_:didDetermineState:forRegion:)))
+    public var didDetermineStateForRegion: Observable<(state: CLRegionState, region: CLRegion)> {
+        return delegate.observe(#selector(CLLocationManagerDelegate.locationManager(_:didDetermineState:for:)))
             .map { a in
                 let stateNumber = try castOrThrow(NSNumber.self, a[1])
-                let state = CLRegionState(rawValue: stateNumber.integerValue) ?? CLRegionState.Unknown
+                let state = CLRegionState(rawValue: stateNumber.intValue) ?? CLRegionState.unknown
                 let region = try castOrThrow(CLRegion.self, a[2])
                 return (state: state, region: region)
             }
@@ -136,8 +136,8 @@ extension CLLocationManager {
     /**
     Reactive wrapper for `delegate` message.
     */
-    public var rx_monitoringDidFailForRegionWithError: Observable<(region: CLRegion?, error: NSError)> {
-        return rx_delegate.observe(#selector(CLLocationManagerDelegate.locationManager(_:monitoringDidFailForRegion:withError:)))
+    public var monitoringDidFailForRegionWithError: Observable<(region: CLRegion?, error: NSError)> {
+        return delegate.observe(#selector(CLLocationManagerDelegate.locationManager(_:monitoringDidFailFor:withError:)))
             .map { a in
                 let region = try castOptionalOrThrow(CLRegion.self, a[1])
                 let error = try castOrThrow(NSError.self, a[2])
@@ -148,8 +148,8 @@ extension CLLocationManager {
     /**
     Reactive wrapper for `delegate` message.
     */
-    public var rx_didStartMonitoringForRegion: Observable<CLRegion> {
-        return rx_delegate.observe(#selector(CLLocationManagerDelegate.locationManager(_:didStartMonitoringForRegion:)))
+    public var didStartMonitoringForRegion: Observable<CLRegion> {
+        return delegate.observe(#selector(CLLocationManagerDelegate.locationManager(_:didStartMonitoringFor:)))
             .map { a in
                 return try castOrThrow(CLRegion.self, a[1])
             }
@@ -164,8 +164,8 @@ extension CLLocationManager {
     /**
     Reactive wrapper for `delegate` message.
     */
-    public var rx_didRangeBeaconsInRegion: Observable<(beacons: [CLBeacon], region: CLBeaconRegion)> {
-        return rx_delegate.observe(#selector(CLLocationManagerDelegate.locationManager(_:didRangeBeacons:inRegion:)))
+    public var didRangeBeaconsInRegion: Observable<(beacons: [CLBeacon], region: CLBeaconRegion)> {
+        return delegate.observe(#selector(CLLocationManagerDelegate.locationManager(_:didRangeBeacons:in:)))
             .map { a in
                 let beacons = try castOrThrow([CLBeacon].self, a[1])
                 let region = try castOrThrow(CLBeaconRegion.self, a[2])
@@ -176,8 +176,8 @@ extension CLLocationManager {
     /**
     Reactive wrapper for `delegate` message.
     */
-    public var rx_rangingBeaconsDidFailForRegionWithError: Observable<(region: CLBeaconRegion, error: NSError)> {
-        return rx_delegate.observe(#selector(CLLocationManagerDelegate.locationManager(_:rangingBeaconsDidFailForRegion:withError:)))
+    public var rangingBeaconsDidFailForRegionWithError: Observable<(region: CLBeaconRegion, error: NSError)> {
+        return delegate.observe(#selector(CLLocationManagerDelegate.locationManager(_:rangingBeaconsDidFailFor:withError:)))
             .map { a in
                 let region = try castOrThrow(CLBeaconRegion.self, a[1])
                 let error = try castOrThrow(NSError.self, a[2])
@@ -191,8 +191,8 @@ extension CLLocationManager {
     Reactive wrapper for `delegate` message.
     */
     @available(iOS 8.0, *)
-    public var rx_didVisit: Observable<CLVisit> {
-        return rx_delegate.observe(#selector(CLLocationManagerDelegate.locationManager(_:didVisit:)))
+    public var didVisit: Observable<CLVisit> {
+        return delegate.observe(#selector(CLLocationManagerDelegate.locationManager(_:didVisit:)))
             .map { a in
                 return try castOrThrow(CLVisit.self, a[1])
             }
@@ -205,11 +205,11 @@ extension CLLocationManager {
     /**
     Reactive wrapper for `delegate` message.
     */
-    public var rx_didChangeAuthorizationStatus: Observable<CLAuthorizationStatus> {
-        return rx_delegate.observe(#selector(CLLocationManagerDelegate.locationManager(_:didChangeAuthorizationStatus:)))
+    public var didChangeAuthorizationStatus: Observable<CLAuthorizationStatus> {
+        return delegate.observe(#selector(CLLocationManagerDelegate.locationManager(_:didChangeAuthorization:)))
             .map { a in
                 let number = try castOrThrow(NSNumber.self, a[1])
-                return CLAuthorizationStatus(rawValue: Int32(number.integerValue)) ?? .NotDetermined
+                return CLAuthorizationStatus(rawValue: Int32(number.intValue)) ?? .notDetermined
             }
     }
 

RxCocoa/Common/CocoaUnits/ControlEvent.swift

@@ -54,7 +54,7 @@ public struct ControlEvent<PropertyType> : ControlEventType {
      - parameter events: Observable sequence that represents events.
      - returns: Control event created with a observable sequence of events.
      */
-    public init<Ev: ObservableType where Ev.E == E>(events: Ev) {
+    public init<Ev: ObservableType>(events: Ev) where Ev.E == E {
         _events = events.subscribeOn(ConcurrentMainScheduler.instance)
     }
 
@@ -64,14 +64,14 @@ public struct ControlEvent<PropertyType> : ControlEventType {
     - parameter observer: Observer to subscribe to events.
     - returns: Disposable object that can be used to unsubscribe the observer from receiving control events.
     */
-    public func subscribe<O : ObserverType where O.E == E>(observer: O) -> Disposable {
+    public func subscribe<O : ObserverType>(_ observer: O) -> Disposable where O.E == E {
         return _events.subscribe(observer)
     }
 
     /**
     - returns: `Observable` interface.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
     public func asObservable() -> Observable<E> {
         return _events
     }
@@ -79,7 +79,7 @@ public struct ControlEvent<PropertyType> : ControlEventType {
     /**
     - returns: `ControlEvent` interface.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
     public func asControlEvent() -> ControlEvent<E> {
         return self
     }

RxCocoa/Common/CocoaUnits/ControlProperty.swift

@@ -59,7 +59,7 @@ public struct ControlProperty<PropertyType> : ControlPropertyType {
      - returns: Control property created with a observable sequence of values and an observer that enables binding values
      to property.
     */
-    public init<V: ObservableType, S: ObserverType where E == V.E, E == S.E>(values: V, valueSink: S) {
+    public init<V: ObservableType, S: ObserverType>(values: V, valueSink: S) where E == V.E, E == S.E {
         _values = values.subscribeOn(ConcurrentMainScheduler.instance)
         _valueSink = valueSink.asObserver()
     }
@@ -70,14 +70,14 @@ public struct ControlProperty<PropertyType> : ControlPropertyType {
     - parameter observer: Observer to subscribe to property values.
     - returns: Disposable object that can be used to unsubscribe the observer from receiving control property values.
     */
-    public func subscribe<O : ObserverType where O.E == E>(observer: O) -> Disposable {
+    public func subscribe<O : ObserverType>(_ observer: O) -> Disposable where O.E == E {
         return _values.subscribe(observer)
     }
 
     /**
     - returns: `Observable` interface.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
     public func asObservable() -> Observable<E> {
         return _values
     }
@@ -85,7 +85,7 @@ public struct ControlProperty<PropertyType> : ControlPropertyType {
     /**
     - returns: `ControlProperty` interface.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
     public func asControlProperty() -> ControlProperty<E> {
         return self
     }
@@ -97,13 +97,13 @@ public struct ControlProperty<PropertyType> : ControlPropertyType {
     - In case error is received, DEBUG buids raise fatal error, RELEASE builds log event to standard output.
     - In case sequence completes, nothing happens.
     */
-    public func on(event: Event<E>) {
+    public func on(_ event: Event<E>) {
         switch event {
-        case .Error(let error):
+        case .error(let error):
             bindingErrorToInterface(error)
-        case .Next:
+        case .next:
             _valueSink.on(event)
-        case .Completed:
+        case .completed:
             _valueSink.on(event)
         }
     }

RxCocoa/Common/CocoaUnits/Driver/ControlEvent+Driver.swift

@@ -17,7 +17,7 @@ extension ControlEvent {
     
     `ControlEvent` already can't fail, so no special case needs to be handled.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
     public func asDriver() -> Driver<E> {
         return self.asDriver { (error) -> Driver<E> in
             #if DEBUG
@@ -27,4 +27,4 @@ extension ControlEvent {
             #endif
         }
     }
-}
+}

RxCocoa/Common/CocoaUnits/Driver/ControlProperty+Driver.swift

@@ -17,7 +17,7 @@ extension ControlProperty {
     
     `ControlProperty` already can't fail, so no special case needs to be handled.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
     public func asDriver() -> Driver<E> {
         return self.asDriver { (error) -> Driver<E> in
             #if DEBUG
@@ -27,4 +27,4 @@ extension ControlProperty {
             #endif
         }
     }
-}
+}

RxCocoa/Common/CocoaUnits/Driver/Driver+Operators+arity.swift

@@ -23,9 +23,9 @@ extension Driver {
     - parameter resultSelector: Function to invoke for each series of elements at corresponding indexes in the sources.
     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
     public static func zip<O1: DriverConvertibleType, O2: DriverConvertibleType>
-        (source1: O1, _ source2: O2, resultSelector: (O1.E, O2.E) throws -> E)
+        (_ source1: O1, _ source2: O2, resultSelector: @escaping (O1.E, O2.E) throws -> E)
         -> Driver<E> {
         let source = Observable.zip(
             source1.asDriver().asObservable(), source2.asDriver().asObservable(),
@@ -43,9 +43,9 @@ extension Driver {
     - parameter resultSelector: Function to invoke whenever any of the sources produces an element.
     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
     public static func combineLatest<O1: DriverConvertibleType, O2: DriverConvertibleType>
-        (source1: O1, _ source2: O2, resultSelector: (O1.E, O2.E) throws -> E)
+        (_ source1: O1, _ source2: O2, resultSelector: @escaping (O1.E, O2.E) throws -> E)
         -> Driver<E> {
         let source = Observable.combineLatest(
                 source1.asDriver().asObservable(), source2.asDriver().asObservable(),
@@ -67,9 +67,9 @@ extension Driver {
     - parameter resultSelector: Function to invoke for each series of elements at corresponding indexes in the sources.
     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
     public static func zip<O1: DriverConvertibleType, O2: DriverConvertibleType, O3: DriverConvertibleType>
-        (source1: O1, _ source2: O2, _ source3: O3, resultSelector: (O1.E, O2.E, O3.E) throws -> E)
+        (_ source1: O1, _ source2: O2, _ source3: O3, resultSelector: @escaping (O1.E, O2.E, O3.E) throws -> E)
         -> Driver<E> {
         let source = Observable.zip(
             source1.asDriver().asObservable(), source2.asDriver().asObservable(), source3.asDriver().asObservable(),
@@ -87,9 +87,9 @@ extension Driver {
     - parameter resultSelector: Function to invoke whenever any of the sources produces an element.
     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
     public static func combineLatest<O1: DriverConvertibleType, O2: DriverConvertibleType, O3: DriverConvertibleType>
-        (source1: O1, _ source2: O2, _ source3: O3, resultSelector: (O1.E, O2.E, O3.E) throws -> E)
+        (_ source1: O1, _ source2: O2, _ source3: O3, resultSelector: @escaping (O1.E, O2.E, O3.E) throws -> E)
         -> Driver<E> {
         let source = Observable.combineLatest(
                 source1.asDriver().asObservable(), source2.asDriver().asObservable(), source3.asDriver().asObservable(),
@@ -111,9 +111,9 @@ extension Driver {
     - parameter resultSelector: Function to invoke for each series of elements at corresponding indexes in the sources.
     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
     public static func zip<O1: DriverConvertibleType, O2: DriverConvertibleType, O3: DriverConvertibleType, O4: DriverConvertibleType>
-        (source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, resultSelector: (O1.E, O2.E, O3.E, O4.E) throws -> E)
+        (_ source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, resultSelector: @escaping (O1.E, O2.E, O3.E, O4.E) throws -> E)
         -> Driver<E> {
         let source = Observable.zip(
             source1.asDriver().asObservable(), source2.asDriver().asObservable(), source3.asDriver().asObservable(), source4.asDriver().asObservable(),
@@ -131,9 +131,9 @@ extension Driver {
     - parameter resultSelector: Function to invoke whenever any of the sources produces an element.
     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
     public static func combineLatest<O1: DriverConvertibleType, O2: DriverConvertibleType, O3: DriverConvertibleType, O4: DriverConvertibleType>
-        (source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, resultSelector: (O1.E, O2.E, O3.E, O4.E) throws -> E)
+        (_ source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, resultSelector: @escaping (O1.E, O2.E, O3.E, O4.E) throws -> E)
         -> Driver<E> {
         let source = Observable.combineLatest(
                 source1.asDriver().asObservable(), source2.asDriver().asObservable(), source3.asDriver().asObservable(), source4.asDriver().asObservable(),
@@ -155,9 +155,9 @@ extension Driver {
     - parameter resultSelector: Function to invoke for each series of elements at corresponding indexes in the sources.
     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
     public static func zip<O1: DriverConvertibleType, O2: DriverConvertibleType, O3: DriverConvertibleType, O4: DriverConvertibleType, O5: DriverConvertibleType>
-        (source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, _ source5: O5, resultSelector: (O1.E, O2.E, O3.E, O4.E, O5.E) throws -> E)
+        (_ source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, _ source5: O5, resultSelector: @escaping (O1.E, O2.E, O3.E, O4.E, O5.E) throws -> E)
         -> Driver<E> {
         let source = Observable.zip(
             source1.asDriver().asObservable(), source2.asDriver().asObservable(), source3.asDriver().asObservable(), source4.asDriver().asObservable(), source5.asDriver().asObservable(),
@@ -175,9 +175,9 @@ extension Driver {
     - parameter resultSelector: Function to invoke whenever any of the sources produces an element.
     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
     public static func combineLatest<O1: DriverConvertibleType, O2: DriverConvertibleType, O3: DriverConvertibleType, O4: DriverConvertibleType, O5: DriverConvertibleType>
-        (source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, _ source5: O5, resultSelector: (O1.E, O2.E, O3.E, O4.E, O5.E) throws -> E)
+        (_ source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, _ source5: O5, resultSelector: @escaping (O1.E, O2.E, O3.E, O4.E, O5.E) throws -> E)
         -> Driver<E> {
         let source = Observable.combineLatest(
                 source1.asDriver().asObservable(), source2.asDriver().asObservable(), source3.asDriver().asObservable(), source4.asDriver().asObservable(), source5.asDriver().asObservable(),
@@ -199,9 +199,9 @@ extension Driver {
     - parameter resultSelector: Function to invoke for each series of elements at corresponding indexes in the sources.
     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
     public static func zip<O1: DriverConvertibleType, O2: DriverConvertibleType, O3: DriverConvertibleType, O4: DriverConvertibleType, O5: DriverConvertibleType, O6: DriverConvertibleType>
-        (source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, _ source5: O5, _ source6: O6, resultSelector: (O1.E, O2.E, O3.E, O4.E, O5.E, O6.E) throws -> E)
+        (_ source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, _ source5: O5, _ source6: O6, resultSelector: @escaping (O1.E, O2.E, O3.E, O4.E, O5.E, O6.E) throws -> E)
         -> Driver<E> {
         let source = Observable.zip(
             source1.asDriver().asObservable(), source2.asDriver().asObservable(), source3.asDriver().asObservable(), source4.asDriver().asObservable(), source5.asDriver().asObservable(), source6.asDriver().asObservable(),
@@ -219,9 +219,9 @@ extension Driver {
     - parameter resultSelector: Function to invoke whenever any of the sources produces an element.
     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
     public static func combineLatest<O1: DriverConvertibleType, O2: DriverConvertibleType, O3: DriverConvertibleType, O4: DriverConvertibleType, O5: DriverConvertibleType, O6: DriverConvertibleType>
-        (source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, _ source5: O5, _ source6: O6, resultSelector: (O1.E, O2.E, O3.E, O4.E, O5.E, O6.E) throws -> E)
+        (_ source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, _ source5: O5, _ source6: O6, resultSelector: @escaping (O1.E, O2.E, O3.E, O4.E, O5.E, O6.E) throws -> E)
         -> Driver<E> {
         let source = Observable.combineLatest(
                 source1.asDriver().asObservable(), source2.asDriver().asObservable(), source3.asDriver().asObservable(), source4.asDriver().asObservable(), source5.asDriver().asObservable(), source6.asDriver().asObservable(),
@@ -243,9 +243,9 @@ extension Driver {
     - parameter resultSelector: Function to invoke for each series of elements at corresponding indexes in the sources.
     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
     public static func zip<O1: DriverConvertibleType, O2: DriverConvertibleType, O3: DriverConvertibleType, O4: DriverConvertibleType, O5: DriverConvertibleType, O6: DriverConvertibleType, O7: DriverConvertibleType>
-        (source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, _ source5: O5, _ source6: O6, _ source7: O7, resultSelector: (O1.E, O2.E, O3.E, O4.E, O5.E, O6.E, O7.E) throws -> E)
+        (_ source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, _ source5: O5, _ source6: O6, _ source7: O7, resultSelector: @escaping (O1.E, O2.E, O3.E, O4.E, O5.E, O6.E, O7.E) throws -> E)
         -> Driver<E> {
         let source = Observable.zip(
             source1.asDriver().asObservable(), source2.asDriver().asObservable(), source3.asDriver().asObservable(), source4.asDriver().asObservable(), source5.asDriver().asObservable(), source6.asDriver().asObservable(), source7.asDriver().asObservable(),
@@ -263,9 +263,9 @@ extension Driver {
     - parameter resultSelector: Function to invoke whenever any of the sources produces an element.
     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
     public static func combineLatest<O1: DriverConvertibleType, O2: DriverConvertibleType, O3: DriverConvertibleType, O4: DriverConvertibleType, O5: DriverConvertibleType, O6: DriverConvertibleType, O7: DriverConvertibleType>
-        (source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, _ source5: O5, _ source6: O6, _ source7: O7, resultSelector: (O1.E, O2.E, O3.E, O4.E, O5.E, O6.E, O7.E) throws -> E)
+        (_ source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, _ source5: O5, _ source6: O6, _ source7: O7, resultSelector: @escaping (O1.E, O2.E, O3.E, O4.E, O5.E, O6.E, O7.E) throws -> E)
         -> Driver<E> {
         let source = Observable.combineLatest(
                 source1.asDriver().asObservable(), source2.asDriver().asObservable(), source3.asDriver().asObservable(), source4.asDriver().asObservable(), source5.asDriver().asObservable(), source6.asDriver().asObservable(), source7.asDriver().asObservable(),
@@ -287,9 +287,9 @@ extension Driver {
     - parameter resultSelector: Function to invoke for each series of elements at corresponding indexes in the sources.
     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
     public static func zip<O1: DriverConvertibleType, O2: DriverConvertibleType, O3: DriverConvertibleType, O4: DriverConvertibleType, O5: DriverConvertibleType, O6: DriverConvertibleType, O7: DriverConvertibleType, O8: DriverConvertibleType>
-        (source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, _ source5: O5, _ source6: O6, _ source7: O7, _ source8: O8, resultSelector: (O1.E, O2.E, O3.E, O4.E, O5.E, O6.E, O7.E, O8.E) throws -> E)
+        (_ source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, _ source5: O5, _ source6: O6, _ source7: O7, _ source8: O8, resultSelector: @escaping (O1.E, O2.E, O3.E, O4.E, O5.E, O6.E, O7.E, O8.E) throws -> E)
         -> Driver<E> {
         let source = Observable.zip(
             source1.asDriver().asObservable(), source2.asDriver().asObservable(), source3.asDriver().asObservable(), source4.asDriver().asObservable(), source5.asDriver().asObservable(), source6.asDriver().asObservable(), source7.asDriver().asObservable(), source8.asDriver().asObservable(),
@@ -307,9 +307,9 @@ extension Driver {
     - parameter resultSelector: Function to invoke whenever any of the sources produces an element.
     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
     public static func combineLatest<O1: DriverConvertibleType, O2: DriverConvertibleType, O3: DriverConvertibleType, O4: DriverConvertibleType, O5: DriverConvertibleType, O6: DriverConvertibleType, O7: DriverConvertibleType, O8: DriverConvertibleType>
-        (source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, _ source5: O5, _ source6: O6, _ source7: O7, _ source8: O8, resultSelector: (O1.E, O2.E, O3.E, O4.E, O5.E, O6.E, O7.E, O8.E) throws -> E)
+        (_ source1: O1, _ source2: O2, _ source3: O3, _ source4: O4, _ source5: O5, _ source6: O6, _ source7: O7, _ source8: O8, resultSelector: @escaping (O1.E, O2.E, O3.E, O4.E, O5.E, O6.E, O7.E, O8.E) throws -> E)
         -> Driver<E> {
         let source = Observable.combineLatest(
                 source1.asDriver().asObservable(), source2.asDriver().asObservable(), source3.asDriver().asObservable(), source4.asDriver().asObservable(), source5.asDriver().asObservable(), source6.asDriver().asObservable(), source7.asDriver().asObservable(), source8.asDriver().asObservable(),
@@ -320,3 +320,4 @@ extension Driver {
     }
 }
 
+

RxCocoa/Common/CocoaUnits/Driver/Driver+Operators+arity.tt

@@ -22,12 +22,12 @@ extension Driver {
     - parameter resultSelector: Function to invoke for each series of elements at corresponding indexes in the sources.
     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public static func zip<<%= (Array(1...i).map { "O\($0): DriverConvertibleType" }).joinWithSeparator(", ") %>>
-        (<%= (Array(1...i).map { "source\($0): O\($0)" }).joinWithSeparator(", _ ") %>, resultSelector: (<%= (Array(1...i).map { "O\($0).E" }).joinWithSeparator(", ") %>) throws -> E)
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
+    public static func zip<<%= (Array(1...i).map { "O\($0): DriverConvertibleType" }).joined(separator: ", ") %>>
+        (<%= (Array(1...i).map { "_ source\($0): O\($0)" }).joined(separator: ", ") %>, resultSelector: @escaping (<%= (Array(1...i).map { "O\($0).E" }).joined(separator: ", ") %>) throws -> E)
         -> Driver<E> {
         let source = Observable.zip(
-            <%= (Array(1...i).map { "source\($0).asDriver().asObservable()" }).joinWithSeparator(", ") %>,
+            <%= (Array(1...i).map { "source\($0).asDriver().asObservable()" }).joined(separator: ", ") %>,
             resultSelector: resultSelector
         )
 
@@ -42,12 +42,12 @@ extension Driver {
     - parameter resultSelector: Function to invoke whenever any of the sources produces an element.
     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public static func combineLatest<<%= (Array(1...i).map { "O\($0): DriverConvertibleType" }).joinWithSeparator(", ") %>>
-        (<%= (Array(1...i).map { "source\($0): O\($0)" }).joinWithSeparator(", _ ") %>, resultSelector: (<%= (Array(1...i).map { "O\($0).E" }).joinWithSeparator(", ") %>) throws -> E)
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
+    public static func combineLatest<<%= (Array(1...i).map { "O\($0): DriverConvertibleType" }).joined(separator: ", ") %>>
+        (<%= (Array(1...i).map { "_ source\($0): O\($0)" }).joined(separator: ", ") %>, resultSelector: @escaping (<%= (Array(1...i).map { "O\($0).E" }).joined(separator: ", ") %>) throws -> E)
         -> Driver<E> {
         let source = Observable.combineLatest(
-                <%= (Array(1...i).map { "source\($0).asDriver().asObservable()" }).joinWithSeparator(", ") %>,
+                <%= (Array(1...i).map { "source\($0).asDriver().asObservable()" }).joined(separator: ", ") %>,
                 resultSelector: resultSelector
             )
 
@@ -55,4 +55,4 @@ extension Driver {
     }
 }
 
-<% } %>
+<% } %>

RxCocoa/Common/CocoaUnits/Driver/Driver+Operators.swift

@@ -20,8 +20,8 @@ extension DriverConvertibleType {
     - parameter selector: A transform function to apply to each source element.
     - returns: An observable sequence whose elements are the result of invoking the transform function on each element of source.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func map<R>(selector: E -> R) -> Driver<R> {
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
+    public func map<R>(_ selector: @escaping (E) -> R) -> Driver<R> {
         let source = self
             .asObservable()
             .map(selector)
@@ -37,8 +37,8 @@ extension DriverConvertibleType {
     - parameter predicate: A function to test each source element for a condition.
     - returns: An observable sequence that contains elements from the input sequence that satisfy the condition.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func filter(predicate: (E) -> Bool) -> Driver<E> {
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
+    public func filter(_ predicate: @escaping (E) -> Bool) -> Driver<E> {
         let source = self
             .asObservable()
             .filter(predicate)
@@ -58,7 +58,7 @@ extension DriverConvertibleType where E : DriverConvertibleType {
     
     - returns: The observable sequence that at any point in time produces the elements of the most recent inner observable sequence that has been received.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
     public func switchLatest() -> Driver<E.E> {
         let source: Observable<E.E> = self
             .asObservable()
@@ -80,8 +80,8 @@ extension DriverConvertibleType {
      - returns: An observable sequence whose elements are the result of invoking the transform function on each element of source producing an
      Observable of Observable sequences and that at any point in time produces the elements of the most recent inner observable sequence that has been received.
      */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func flatMapLatest<R>(selector: (E) -> Driver<R>)
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
+    public func flatMapLatest<R>(_ selector: @escaping (E) -> Driver<R>)
         -> Driver<R> {
         let source: Observable<R> = self
             .asObservable()
@@ -100,8 +100,8 @@ extension DriverConvertibleType {
      - parameter selector: A transform function to apply to element that was observed while no observable is executing in parallel.
      - returns: An observable sequence whose elements are the result of invoking the one-to-many transform function on each element of the input sequence that was received while no other sequence was being calculated.
      */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func flatMapFirst<R>(selector: (E) -> Driver<R>)
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
+    public func flatMapFirst<R>(_ selector: @escaping (E) -> Driver<R>)
         -> Driver<R> {
         let source: Observable<R> = self
             .asObservable()
@@ -119,11 +119,12 @@ extension DriverConvertibleType {
     - parameter eventHandler: Action to invoke for each event in the observable sequence.
     - returns: The source sequence with the side-effecting behavior applied.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func doOn(eventHandler: (Event<E>) -> Void)
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
+    @available(*, deprecated, renamed: "do(onNext:onError:onCompleted:)")
+    public func doOn(_ eventHandler: @escaping (Event<E>) -> Void)
         -> Driver<E> {
         let source = self.asObservable()
-                .doOn(eventHandler)
+            .doOn(eventHandler)
         
         return Driver(source)
     }
@@ -136,8 +137,9 @@ extension DriverConvertibleType {
     - parameter onCompleted: Action to invoke upon graceful termination of the observable sequence.
     - returns: The source sequence with the side-effecting behavior applied.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func doOn(onNext onNext: (E -> Void)? = nil, onError: (ErrorType -> Void)? = nil, onCompleted: (() -> Void)? = nil)
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
+    @available(*, deprecated, renamed: "do(onNext:onError:onCompleted:)")
+    public func doOn(onNext: ((E) -> Void)? = nil, onError: ((Swift.Error) -> Void)? = nil, onCompleted: (() -> Void)? = nil)
         -> Driver<E> {
         let source = self.asObservable()
             .doOn(onNext: onNext, onError: onError, onCompleted: onCompleted)
@@ -151,10 +153,11 @@ extension DriverConvertibleType {
      - parameter onNext: Action to invoke for each element in the observable sequence.
      - returns: The source sequence with the side-effecting behavior applied.
      */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func doOnNext(onNext: (E -> Void))
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
+    @available(*, deprecated, renamed: "do(onNext:)")
+    public func doOnNext(_ onNext: @escaping (E) -> Void)
         -> Driver<E> {
-        return self.doOn(onNext: onNext)
+            return self.do(onNext: onNext)
     }
 
     /**
@@ -163,10 +166,30 @@ extension DriverConvertibleType {
      - parameter onCompleted: Action to invoke upon graceful termination of the observable sequence.
      - returns: The source sequence with the side-effecting behavior applied.
      */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func doOnCompleted(onCompleted: (() -> Void))
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
+    @available(*, deprecated, renamed: "do(onCompleted:)")
+    public func doOnCompleted(_ onCompleted: @escaping () -> Void)
         -> Driver<E> {
-        return self.doOn(onCompleted: onCompleted)
+            return self.do(onCompleted: onCompleted)
+    }
+
+    /**
+     Invokes an action for each event in the observable sequence, and propagates all observer messages through the result sequence.
+
+     - parameter onNext: Action to invoke for each element in the observable sequence.
+     - parameter onError: Action to invoke upon errored termination of the observable sequence. This callback will never be invoked since driver can't error out.
+     - parameter onCompleted: Action to invoke upon graceful termination of the observable sequence.
+     - parameter onSubscribe: Action to invoke before subscribing to source observable sequence.
+     - parameter onDispose: Action to invoke after subscription to source observable has been disposed for any reason. It can be either because sequence terminates for some reason or observer subscription being disposed.
+     - returns: The source sequence with the side-effecting behavior applied.
+     */
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
+    public func `do`(onNext: ((E) -> Void)? = nil, onError: ((Swift.Error) -> Void)? = nil, onCompleted: (() -> Void)? = nil, onSubscribe: (() -> ())? = nil, onDispose: (() -> ())? = nil)
+        -> Driver<E> {
+        let source = self.asObservable()
+            .do(onNext: onNext, onError: onError, onCompleted: onCompleted, onSubscribe: onSubscribe, onDispose: onDispose)
+
+        return Driver(source)
     }
 }
 
@@ -179,8 +202,8 @@ extension DriverConvertibleType {
     - parameter identifier: Identifier that is printed together with event description to standard output.
     - returns: An observable sequence whose events are printed to standard output.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func debug(identifier: String? = nil, file: String = #file, line: UInt = #line, function: String = #function) -> Driver<E> {
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
+    public func debug(_ identifier: String? = nil, file: String = #file, line: UInt = #line, function: String = #function) -> Driver<E> {
         let source = self.asObservable()
             .debug(identifier, file: file, line: line, function: function)
         return Driver(source)
@@ -195,7 +218,7 @@ extension DriverConvertibleType where E: Equatable {
     
     - returns: An observable sequence only containing the distinct contiguous elements, based on equality operator, from the source sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
     public func distinctUntilChanged()
         -> Driver<E> {
         let source = self.asObservable()
@@ -213,8 +236,8 @@ extension DriverConvertibleType {
     - parameter keySelector: A function to compute the comparison key for each element.
     - returns: An observable sequence only containing the distinct contiguous elements, based on a computed key value, from the source sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func distinctUntilChanged<K: Equatable>(keySelector: (E) -> K) -> Driver<E> {
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
+    public func distinctUntilChanged<K: Equatable>(_ keySelector: @escaping (E) -> K) -> Driver<E> {
         let source = self.asObservable()
             .distinctUntilChanged(keySelector, comparer: { $0 == $1 })
         return Driver(source)
@@ -226,8 +249,8 @@ extension DriverConvertibleType {
     - parameter comparer: Equality comparer for computed key values.
     - returns: An observable sequence only containing the distinct contiguous elements, based on `comparer`, from the source sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func distinctUntilChanged(comparer: (lhs: E, rhs: E) -> Bool) -> Driver<E> {
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
+    public func distinctUntilChanged(_ comparer: @escaping (E, E) -> Bool) -> Driver<E> {
         let source = self.asObservable()
             .distinctUntilChanged({ $0 }, comparer: comparer)
         return Driver(source)
@@ -240,8 +263,8 @@ extension DriverConvertibleType {
     - parameter comparer: Equality comparer for computed key values.
     - returns: An observable sequence only containing the distinct contiguous elements, based on a computed key value and the comparer, from the source sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func distinctUntilChanged<K>(keySelector: (E) -> K, comparer: (lhs: K, rhs: K) -> Bool) -> Driver<E> {
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
+    public func distinctUntilChanged<K>(_ keySelector: @escaping (E) -> K, comparer: @escaping (K, K) -> Bool) -> Driver<E> {
         let source = self.asObservable()
             .distinctUntilChanged(keySelector, comparer: comparer)
         return Driver(source)
@@ -258,8 +281,8 @@ extension DriverConvertibleType {
     - parameter selector: A transform function to apply to each element.
     - returns: An observable sequence whose elements are the result of invoking the one-to-many transform function on each element of the input sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func flatMap<R>(selector: (E) -> Driver<R>) -> Driver<R> {
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
+    public func flatMap<R>(_ selector: @escaping (E) -> Driver<R>) -> Driver<R> {
         let source = self.asObservable()
             .flatMap(selector)
         
@@ -276,7 +299,7 @@ extension DriverConvertibleType where E : DriverConvertibleType {
     - parameter maxConcurrent: Maximum number of inner observable sequences being subscribed to concurrently.
     - returns: The observable sequence that merges the elements of the observable sequences.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
     public func merge() -> Driver<E.E> {
         let source = self.asObservable()
             .map { $0.asDriver() }
@@ -289,8 +312,8 @@ extension DriverConvertibleType where E : DriverConvertibleType {
     
     - returns: The observable sequence that merges the elements of the inner sequences.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func merge(maxConcurrent maxConcurrent: Int)
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
+    public func merge(maxConcurrent: Int)
         -> Driver<E.E> {
         let source = self.asObservable()
             .map { $0.asDriver() }
@@ -310,8 +333,8 @@ extension DriverConvertibleType {
     - parameter dueTime: Throttling duration for each element.
     - returns: The throttled sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func throttle(dueTime: RxTimeInterval)
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
+    public func throttle(_ dueTime: RxTimeInterval)
         -> Driver<E> {
         let source = self.asObservable()
             .throttle(dueTime, scheduler: driverObserveOnScheduler)
@@ -327,8 +350,8 @@ extension DriverConvertibleType {
     - parameter dueTime: Throttling duration for each element.
     - returns: The throttled sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func debounce(dueTime: RxTimeInterval)
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
+    public func debounce(_ dueTime: RxTimeInterval)
         -> Driver<E> {
         let source = self.asObservable()
             .debounce(dueTime, scheduler: driverObserveOnScheduler)
@@ -348,8 +371,8 @@ extension DriverConvertibleType {
     - parameter accumulator: An accumulator function to be invoked on each element.
     - returns: An observable sequence containing the accumulated values.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func scan<A>(seed: A, accumulator: (A, E) -> A)
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
+    public func scan<A>(_ seed: A, accumulator: @escaping (A, E) -> A)
         -> Driver<A> {
         let source = self.asObservable()
             .scan(seed, accumulator: accumulator)
@@ -358,29 +381,29 @@ extension DriverConvertibleType {
 }
 
 // MARK: concat
-extension SequenceType where Generator.Element : DriverConvertibleType {
+extension Sequence where Iterator.Element : DriverConvertibleType {
 
     /**
     Concatenates all observable sequences in the given sequence, as long as the previous observable sequence terminated successfully.
 
     - returns: An observable sequence that contains the elements of each given sequence, in sequential order.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
     public func concat()
-        -> Driver<Generator.Element.E> {
+        -> Driver<Iterator.Element.E> {
         let source = self.lazy.map { $0.asDriver().asObservable() }.concat()
-        return Driver<Generator.Element.E>(source)
+        return Driver<Iterator.Element.E>(source)
     }
 }
 
-extension CollectionType where Generator.Element : DriverConvertibleType {
+extension Collection where Iterator.Element : DriverConvertibleType {
 
     /**
      Concatenates all observable sequences in the given sequence, as long as the previous observable sequence terminated successfully.
 
      - returns: An observable sequence that contains the elements of each given sequence, in sequential order.
      */
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
     public func concat()
         -> Driver<Generator.Element.E> {
         let source = self.map { $0.asDriver().asObservable() }.concat()
@@ -389,7 +412,7 @@ extension CollectionType where Generator.Element : DriverConvertibleType {
 }
 
 // MARK: zip
-extension CollectionType where Generator.Element : DriverConvertibleType {
+extension Collection where Iterator.Element : DriverConvertibleType {
 
     /**
     Merges the specified observable sequences into one observable sequence by using the selector function whenever all of the observable sequences have produced an element at a corresponding index.
@@ -397,15 +420,15 @@ extension CollectionType where Generator.Element : DriverConvertibleType {
     - parameter resultSelector: Function to invoke for each series of elements at corresponding indexes in the sources.
     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func zip<R>(resultSelector: [Generator.Element.E] throws -> R) -> Driver<R> {
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
+    public func zip<R>(_ resultSelector: @escaping ([Generator.Element.E]) throws -> R) -> Driver<R> {
         let source = self.map { $0.asDriver().asObservable() }.zip(resultSelector)
         return Driver<R>(source)
     }
 }
 
 // MARK: combineLatest
-extension CollectionType where Generator.Element : DriverConvertibleType {
+extension Collection where Iterator.Element : DriverConvertibleType {
 
     /**
     Merges the specified observable sequences into one observable sequence by using the selector function whenever any of the observable sequences produces an element.
@@ -413,8 +436,8 @@ extension CollectionType where Generator.Element : DriverConvertibleType {
     - parameter resultSelector: Function to invoke whenever any of the sources produces an element.
     - returns: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func combineLatest<R>(resultSelector: [Generator.Element.E] throws -> R) -> Driver<R> {
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
+    public func combineLatest<R>(_ resultSelector: @escaping ([Generator.Element.E]) throws -> R) -> Driver<R> {
         let source = self.map { $0.asDriver().asObservable() }.combineLatest(resultSelector)
         return Driver<R>(source)
     }
@@ -430,7 +453,7 @@ extension DriverConvertibleType {
     - parameter resultSelector: Function to invoke for each element from the self combined with the latest element from the second source, if any.
     - returns: An observable sequence containing the result of combining each element of the self  with the latest element from the second source, if any, using the specified result selector function.
     */
-    public func withLatestFrom<SecondO: DriverConvertibleType, ResultType>(second: SecondO, resultSelector: (E, SecondO.E) -> ResultType) -> Driver<ResultType> {
+    public func withLatestFrom<SecondO: DriverConvertibleType, ResultType>(_ second: SecondO, resultSelector: @escaping (E, SecondO.E) -> ResultType) -> Driver<ResultType> {
         let source = self.asObservable()
             .withLatestFrom(second.asDriver(), resultSelector: resultSelector)
 
@@ -443,7 +466,7 @@ extension DriverConvertibleType {
     - parameter second: Second observable source.
     - returns: An observable sequence containing the result of combining each element of the self  with the latest element from the second source, if any, using the specified result selector function.
     */
-    public func withLatestFrom<SecondO: DriverConvertibleType>(second: SecondO) -> Driver<SecondO.E> {
+    public func withLatestFrom<SecondO: DriverConvertibleType>(_ second: SecondO) -> Driver<SecondO.E> {
         let source = self.asObservable()
             .withLatestFrom(second.asDriver())
 
@@ -462,8 +485,8 @@ extension DriverConvertibleType {
      - parameter count: The number of elements to skip before returning the remaining elements.
      - returns: An observable sequence that contains the elements that occur after the specified index in the input sequence.
      */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func skip(count: Int)
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
+    public func skip(_ count: Int)
         -> Driver<E> {
         let source = self.asObservable()
             .skip(count)
@@ -482,12 +505,12 @@ extension DriverConvertibleType {
     - parameter element: Element to prepend to the specified sequence.
     - returns: The source sequence prepended with the specified values.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func startWith(element: E)
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
+    public func startWith(_ element: E)
         -> Driver<E> {
         let source = self.asObservable()
                 .startWith(element)
 
         return Driver(source)
     }
-}
+}

RxCocoa/Common/CocoaUnits/Driver/Driver+Subscription.swift

@@ -11,30 +11,50 @@ import Foundation
 import RxSwift
 #endif
 
+private let driverErrorMessage = "`drive*` family of methods can be only called from `MainThread`.\n" +
+"This is required to ensure that the last replayed `Driver` element is delivered on `MainThread`.\n"
+
 extension DriverConvertibleType {
     /**
     Creates new subscription and sends elements to observer.
+    This method can be only called from `MainThread`.
 
     In this form it's equivalent to `subscribe` method, but it communicates intent better.
 
     - parameter observer: Observer that receives events.
     - returns: Disposable object that can be used to unsubscribe the observer from the subject.
     */
-    @warn_unused_result(message="http://git.io/rxs.ud")
-    public func drive<O: ObserverType where O.E == E>(observer: O) -> Disposable {
-        MainScheduler.ensureExecutingOnScheduler()
+    // @warn_unused_result(message:"http://git.io/rxs.ud")
+    public func drive<O: ObserverType>(_ observer: O) -> Disposable where O.E == E {
+        MainScheduler.ensureExecutingOnScheduler(errorMessage: driverErrorMessage)
         return self.asObservable().subscribe(observer)
     }
 
+    /**
+    Creates new subscription and sends elements to variable.
+    This method can be only called from `MainThread`.
+
+    - parameter variable: Target variable for sequence elements.
+    - returns: Disposable object that can be used to unsubscribe the observer from the variable.
+    */
+    // @warn_unused_result(message:"http://git.io/rxs.ud")
+    public func drive(_ variable: Variable<E>) -> Disposable {
+        MainScheduler.ensureExecutingOnScheduler(errorMessage: driverErrorMessage)
+        return drive(onNext: { e in
+            variable.value = e
+        })
+    }
+
     /**
     Subscribes to observable sequence using custom binder function.
+    This method can be only called from `MainThread`.
 
     - parameter with: Function used to bind elements from `self`.
     - returns: Object representing subscription.
     */
-    @warn_unused_result(message="http://git.io/rxs.ud")
-    public func drive<R>(transformation: Observable<E> -> R) -> R {
-        MainScheduler.ensureExecutingOnScheduler()
+    // @warn_unused_result(message:"http://git.io/rxs.ud")
+    public func drive<R>(_ transformation: (Observable<E>) -> R) -> R {
+        MainScheduler.ensureExecutingOnScheduler(errorMessage: driverErrorMessage)
         return transformation(self.asObservable())
     }
 
@@ -46,18 +66,21 @@ extension DriverConvertibleType {
             return with(self)(curriedArgument)
         }
 
+    This method can be only called from `MainThread`.
+
     - parameter with: Function used to bind elements from `self`.
     - parameter curriedArgument: Final argument passed to `binder` to finish binding process.
     - returns: Object representing subscription.
     */
-    @warn_unused_result(message="http://git.io/rxs.ud")
-    public func drive<R1, R2>(with: Observable<E> -> R1 -> R2, curriedArgument: R1) -> R2 {
-        MainScheduler.ensureExecutingOnScheduler()
+    // @warn_unused_result(message:"http://git.io/rxs.ud")
+    public func drive<R1, R2>(_ with: (Observable<E>) -> (R1) -> R2, curriedArgument: R1) -> R2 {
+        MainScheduler.ensureExecutingOnScheduler(errorMessage: driverErrorMessage)
         return with(self.asObservable())(curriedArgument)
     }
     
     /**
     Subscribes an element handler, a completion handler and disposed handler to an observable sequence.
+    This method can be only called from `MainThread`.
     
     Error callback is not exposed because `Driver` can't error out.
     
@@ -68,22 +91,24 @@ extension DriverConvertibleType {
     gracefully completed, errored, or if the generation is cancelled by disposing subscription)
     - returns: Subscription object used to unsubscribe from the observable sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.ud")
-    public func drive(onNext onNext: ((E) -> Void)? = nil, onCompleted: (() -> Void)? = nil, onDisposed: (() -> Void)? = nil) -> Disposable {
-        MainScheduler.ensureExecutingOnScheduler()
+    // @warn_unused_result(message:"http://git.io/rxs.ud")
+    public func drive(onNext: ((E) -> Void)? = nil, onCompleted: (() -> Void)? = nil, onDisposed: (() -> Void)? = nil) -> Disposable {
+        MainScheduler.ensureExecutingOnScheduler(errorMessage: driverErrorMessage)
         return self.asObservable().subscribe(onNext: onNext, onCompleted: onCompleted, onDisposed: onDisposed)
     }
     
     /**
     Subscribes an element handler to an observable sequence.
+    This method can be only called from `MainThread`.
     
     - parameter onNext: Action to invoke for each element in the observable sequence.
     - returns: Subscription object used to unsubscribe from the observable sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.ud")
-    public func driveNext(onNext: E -> Void) -> Disposable {
-        MainScheduler.ensureExecutingOnScheduler()
-        return self.asObservable().subscribeNext(onNext)
+    // @warn_unused_result(message:"http://git.io/rxs.ud")
+    @available(*, deprecated, renamed: "drive(onNext:)")
+    public func driveNext(_ onNext: @escaping (E) -> Void) -> Disposable {
+        MainScheduler.ensureExecutingOnScheduler(errorMessage: driverErrorMessage)
+        return self.asObservable().subscribe(onNext: onNext)
     }
 }
 

RxCocoa/Common/CocoaUnits/Driver/Driver.swift

@@ -19,12 +19,12 @@ public protocol DriverConvertibleType : ObservableConvertibleType {
     /**
     Converts self to `Driver`.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
     func asDriver() -> Driver<E>
 }
 
 extension DriverConvertibleType {
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
     public func asObservable() -> Observable<E> {
         return asDriver().asObservable()
     }
@@ -75,7 +75,7 @@ public struct Driver<Element> : DriverConvertibleType {
     /**
     - returns: Built observable sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
     public func asObservable() -> Observable<E> {
         return _source
     }
@@ -83,7 +83,7 @@ public struct Driver<Element> : DriverConvertibleType {
     /**
     - returns: `self`
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
     public func asDriver() -> Driver<E> {
         return self
     }
@@ -97,9 +97,9 @@ extension Driver {
 
     - returns: An observable sequence with no elements.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
     public static func empty() -> Driver<E> {
-        return Driver(raw: Observable.empty().subscribeOn(driverSubscribeOnScheduler))
+        return Driver(Observable.empty().subscribeOn(driverSubscribeOnScheduler))
     }
 
     /**
@@ -107,9 +107,9 @@ extension Driver {
 
     - returns: An observable sequence whose observers will never get called.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
     public static func never() -> Driver<E> {
-        return Driver(raw: Observable.never().subscribeOn(driverSubscribeOnScheduler))
+        return Driver(Observable.never().subscribeOn(driverSubscribeOnScheduler))
     }
 
     /**
@@ -118,9 +118,9 @@ extension Driver {
     - parameter element: Single element in the resulting observable sequence.
     - returns: An observable sequence containing the single specified element.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public static func just(element: E) -> Driver<E> {
-        return Driver(raw: Observable.just(element).subscribeOn(driverSubscribeOnScheduler))
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
+    public static func just(_ element: E) -> Driver<E> {
+        return Driver(Observable.just(element).subscribeOn(driverSubscribeOnScheduler))
     }
 
     /**
@@ -129,8 +129,8 @@ extension Driver {
      - parameter observableFactory: Observable factory function to invoke for each observer that subscribes to the resulting sequence.
      - returns: An observable sequence whose observers trigger an invocation of the given observable factory function.
      */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public static func deferred(observableFactory: () -> Driver<E>)
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
+    public static func deferred(_ observableFactory: @escaping () -> Driver<E>)
         -> Driver<E> {
         return Driver(Observable.deferred { observableFactory().asObservable() })
     }
@@ -143,14 +143,14 @@ extension Driver {
     - parameter elements: Elements to generate.
     - returns: The observable sequence whose elements are pulled from the given arguments.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public static func of(elements: E ...) -> Driver<E> {
-        let source = elements.toObservable(driverSubscribeOnScheduler)
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
+    public static func of(_ elements: E ...) -> Driver<E> {
+        let source = Observable.from(elements, scheduler: driverSubscribeOnScheduler)
         return Driver(raw: source)
     }
 }
 
-extension Driver where Element : SignedIntegerType {
+extension Driver where Element : SignedInteger {
     /**
      Returns an observable sequence that produces a value after each period, using the specified scheduler to run timers and to send out observer messages.
 
@@ -159,8 +159,8 @@ extension Driver where Element : SignedIntegerType {
      - parameter period: Period for producing the values in the resulting sequence.
      - returns: An observable sequence that produces a value after each period.
      */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public static func interval(period: RxTimeInterval)
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
+    public static func interval(_ period: RxTimeInterval)
         -> Driver<E> {
         return Driver(Observable.interval(period, scheduler: driverObserveOnScheduler))
     }
@@ -168,7 +168,7 @@ extension Driver where Element : SignedIntegerType {
 
 // MARK: timer
 
-extension Driver where Element: SignedIntegerType {
+extension Driver where Element: SignedInteger {
     /**
      Returns an observable sequence that periodically produces a value after the specified initial relative due time has elapsed, using the specified scheduler to run timers.
 
@@ -178,8 +178,8 @@ extension Driver where Element: SignedIntegerType {
      - parameter period: Period to produce subsequent values.
      - returns: An observable sequence that produces a value after due time has elapsed and then each period.
      */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public static func timer(dueTime: RxTimeInterval, period: RxTimeInterval)
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
+    public static func timer(_ dueTime: RxTimeInterval, period: RxTimeInterval)
         -> Driver<E> {
         return Driver(Observable.timer(dueTime, period: period, scheduler: driverObserveOnScheduler))
     }
@@ -187,11 +187,11 @@ extension Driver where Element: SignedIntegerType {
 
 /**
  This method can be used in unit tests to ensure that driver is using mock schedulers instead of
- maind schedulers.
+ main schedulers.
 
  **This shouldn't be used in normal release builds.**
 */
-public func driveOnScheduler(scheduler: SchedulerType, action: () -> ()) {
+public func driveOnScheduler(_ scheduler: SchedulerType, action: () -> ()) {
     let originalObserveOnScheduler = driverObserveOnScheduler
     let originalSubscribeOnScheduler = driverSubscribeOnScheduler
 
@@ -209,9 +209,9 @@ public func driveOnScheduler(scheduler: SchedulerType, action: () -> ()) {
     driverSubscribeOnScheduler = originalSubscribeOnScheduler
 }
 
-func _forceCompilerToStopDoingInsaneOptimizationsThatBreakCode(scheduler: SchedulerType) {
+func _forceCompilerToStopDoingInsaneOptimizationsThatBreakCode(_ scheduler: SchedulerType) {
     let a: Int32 = 1
-    let b = 314 + Int32(rand() & 1)
+    let b = 314 + Int32(arc4random() & 1)
     if a == b {
         print(scheduler)
     }

RxCocoa/Common/CocoaUnits/Driver/ObservableConvertibleType+Driver.swift

@@ -18,8 +18,8 @@ extension ObservableConvertibleType {
     - parameter onErrorJustReturn: Element to return in case of error and after that complete the sequence.
     - returns: Driving observable sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func asDriver(onErrorJustReturn onErrorJustReturn: E) -> Driver<E> {
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
+    public func asDriver(onErrorJustReturn: E) -> Driver<E> {
         let source = self
             .asObservable()
             .observeOn(driverObserveOnScheduler)
@@ -33,8 +33,8 @@ extension ObservableConvertibleType {
     - parameter onErrorDriveWith: Driver that continues to drive the sequence in case of error.
     - returns: Driving observable sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func asDriver(onErrorDriveWith onErrorDriveWith: Driver<E>) -> Driver<E> {
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
+    public func asDriver(onErrorDriveWith: Driver<E>) -> Driver<E> {
         let source = self
             .asObservable()
             .observeOn(driverObserveOnScheduler)
@@ -50,14 +50,14 @@ extension ObservableConvertibleType {
     - parameter onErrorRecover: Calculates driver that continues to drive the sequence in case of error.
     - returns: Driving observable sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func asDriver(onErrorRecover onErrorRecover: (error: ErrorType) -> Driver<E>) -> Driver<E> {
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
+    public func asDriver(onErrorRecover: @escaping (_ error: Swift.Error) -> Driver<E>) -> Driver<E> {
         let source = self
             .asObservable()
             .observeOn(driverObserveOnScheduler)
             .catchError { error in
-                onErrorRecover(error: error).asObservable()
+                onErrorRecover(error).asObservable()
             }
         return Driver(source)
     }
-}
+}

RxCocoa/Common/CocoaUnits/Driver/Variable+Driver.swift

@@ -17,10 +17,10 @@ extension Variable {
 
      - returns: Driving observable sequence.
      */
-    @warn_unused_result(message="http://git.io/rxs.uo")
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
     public func asDriver() -> Driver<E> {
         let source = self.asObservable()
             .observeOn(driverObserveOnScheduler)
         return Driver(source)
     }
-}
+}

RxCocoa/Common/CocoaUnits/UIBindingObserver.swift

@@ -16,9 +16,9 @@ Observer that enforces interface binding rules:
  * can't bind errors (in debug builds binding of errors causes `fatalError` in release builds errors are being logged)
  * ensures binding is performed on main thread
  
-`InterfaceBindingObserver` doesn't retain target interface and in case owned interface element is released, element isn't bound.
+`UIBindingObserver` doesn't retain target interface and in case owned interface element is released, element isn't bound.
 */
-public class UIBindingObserver<UIElementType, Value where UIElementType: AnyObject> : ObserverType {
+public class UIBindingObserver<UIElementType, Value> : ObserverType where UIElementType: AnyObject {
     public typealias E = Value
 
     weak var UIElement: UIElementType?
@@ -28,7 +28,7 @@ public class UIBindingObserver<UIElementType, Value where UIElementType: AnyObje
     /**
      Initializes `ViewBindingObserver` using
     */
-    public init(UIElement: UIElementType, binding: (UIElementType, Value) -> Void) {
+    public init(UIElement: UIElementType, binding: @escaping (UIElementType, Value) -> Void) {
         self.UIElement = UIElement
         self.binding = binding
     }
@@ -36,18 +36,17 @@ public class UIBindingObserver<UIElementType, Value where UIElementType: AnyObje
     /**
      Binds next element to owner view as described in `binding`.
     */
-    public func on(event: Event<Value>) {
-        MainScheduler.ensureExecutingOnScheduler()
+    public func on(_ event: Event<Value>) {
+        MainScheduler.ensureExecutingOnScheduler(errorMessage: "Element can be bound to user interface only on MainThread.")
 
         switch event {
-        case .Next(let element):
+        case .next(let element):
             if let view = self.UIElement {
                 binding(view, element)
             }
-        case .Error(let error):
+        case .error(let error):
             bindingErrorToInterface(error)
-            break
-        case .Completed:
+        case .completed:
             break
         }
     }
@@ -60,4 +59,4 @@ public class UIBindingObserver<UIElementType, Value where UIElementType: AnyObje
     public func asObserver() -> AnyObserver<Value> {
         return AnyObserver(eventHandler: on)
     }
-}
+}

RxCocoa/Common/DelegateProxy.swift

@@ -19,7 +19,7 @@ Base class for `DelegateProxyType` protocol.
 
 This implementation is not thread safe and can be used only from one thread (Main thread).
 */
-public class DelegateProxy : _RXDelegateProxy {
+open class DelegateProxy : _RXDelegateProxy {
     
     private var subjectsForSelector = [Selector: PublishSubject<[AnyObject]>]()
 
@@ -45,16 +45,52 @@ public class DelegateProxy : _RXDelegateProxy {
     
     /**
     Returns observable sequence of invocations of delegate methods.
-    
+
+    Only methods that have `void` return value can be observed using this method because
+     those methods are used as a notification mechanism. It doesn't matter if they are optional
+     or not. Observing is performed by installing a hidden associated `PublishSubject` that is 
+     used to dispatch messages to observers.
+
+    Delegate methods that have non `void` return value can't be observed directly using this method
+     because:
+     * those methods are not intended to be used as a notification mechanism, but as a behavior customization mechanism
+     * there is no sensible automatic way to determine a default return value
+
+    In case observing of delegate methods that have return type is required, it can be done by
+     manually installing a `PublishSubject` or `BehaviorSubject` and implementing delegate method.
+     
+     e.g.
+     
+         // delegate proxy part (RxScrollViewDelegateProxy)
+
+         let internalSubject = PublishSubject<CGPoint>
+     
+         public func requiredDelegateMethod(scrollView: UIScrollView, arg1: CGPoint) -> Bool {
+             internalSubject.on(.next(arg1))
+             return self._forwardToDelegate?.requiredDelegateMethod?(scrollView, arg1: arg1) ?? defaultReturnValue
+         }
+     
+         ....
+
+         // reactive property implementation in a real class (`UIScrollView`)
+         public var property: Observable<CGPoint> {
+             let proxy = RxScrollViewDelegateProxy.proxyForObject(base)
+             return proxy.internalSubject.asObservable()
+         }
+
+     **In case calling this method prints "Delegate proxy is already implementing `\(selector)`, 
+     a more performant way of registering might exist.", that means that manual observing method 
+     is required analog to the example above because delegate method has already been implemented.**
+
     - parameter selector: Selector used to filter observed invocations of delegate methods.
     - returns: Observable sequence of arguments passed to `selector` method.
     */
-    public func observe(selector: Selector) -> Observable<[AnyObject]> {
-        if hasWiredImplementationForSelector(selector) {
+    public func observe(_ selector: Selector) -> Observable<[AnyObject]> {
+        if hasWiredImplementation(for: selector) {
             print("Delegate proxy is already implementing `\(selector)`, a more performant way of registering might exist.")
         }
 
-        if !self.respondsToSelector(selector) {
+        if !self.responds(to: selector) {
             rxFatalError("This class doesn't respond to selector \(selector)")
         }
         
@@ -72,8 +108,8 @@ public class DelegateProxy : _RXDelegateProxy {
     
     // proxy
     
-    public override func interceptedSelector(selector: Selector, withArguments arguments: [AnyObject]!) {
-        subjectsForSelector[selector]?.on(.Next(arguments))
+    open override func interceptedSelector(_ selector: Selector, withArguments arguments: [Any]) {
+        subjectsForSelector[selector]?.on(.next(arguments as [AnyObject]))
     }
     
     /**
@@ -81,7 +117,7 @@ public class DelegateProxy : _RXDelegateProxy {
     
     - returns: Associated object tag.
     */
-    public class func delegateAssociatedObjectTag() -> UnsafePointer<Void> {
+    public class func delegateAssociatedObjectTag() -> UnsafeRawPointer {
         return _pointer(&delegateAssociatedTag)
     }
     
@@ -90,7 +126,7 @@ public class DelegateProxy : _RXDelegateProxy {
     
     - returns: Initialized instance of `self`.
     */
-    public class func createProxyForObject(object: AnyObject) -> AnyObject {
+    public class func createProxyForObject(_ object: AnyObject) -> AnyObject {
         return self.init(parentObject: object)
     }
     
@@ -100,9 +136,9 @@ public class DelegateProxy : _RXDelegateProxy {
     - parameter object: Object that can have assigned delegate proxy.
     - returns: Assigned delegate proxy or `nil` if no delegate proxy is assigned.
     */
-    public class func assignedProxyFor(object: AnyObject) -> AnyObject? {
-        let maybeDelegate: AnyObject? = objc_getAssociatedObject(object, self.delegateAssociatedObjectTag())
-        return castOptionalOrFatalError(maybeDelegate)
+    public class func assignedProxyFor(_ object: AnyObject) -> AnyObject? {
+        let maybeDelegate = objc_getAssociatedObject(object, self.delegateAssociatedObjectTag())
+        return castOptionalOrFatalError(maybeDelegate.map { $0 as AnyObject })
     }
     
     /**
@@ -111,8 +147,8 @@ public class DelegateProxy : _RXDelegateProxy {
     - parameter object: Object that can have assigned delegate proxy.
     - parameter proxy: Delegate proxy object to assign to `object`.
     */
-    public class func assignProxy(proxy: AnyObject, toObject object: AnyObject) {
-        precondition(proxy.isKindOfClass(self.classForCoder()))
+    public class func assignProxy(_ proxy: AnyObject, toObject object: AnyObject) {
+        precondition(proxy.isKind(of: self.classForCoder()))
        
         objc_setAssociatedObject(object, self.delegateAssociatedObjectTag(), proxy, .OBJC_ASSOCIATION_RETAIN)
     }
@@ -124,8 +160,8 @@ public class DelegateProxy : _RXDelegateProxy {
     - parameter forwardToDelegate: Reference of delegate that receives all messages through `self`.
     - parameter retainDelegate: Should `self` retain `forwardToDelegate`.
     */
-    public func setForwardToDelegate(delegate: AnyObject?, retainDelegate: Bool) {
-        self._setForwardToDelegate(delegate, retainDelegate: retainDelegate)
+    public func setForwardToDelegate(_ delegate: AnyObject?, retainDelegate: Bool) {
+        self._setForward(toDelegate: delegate, retainDelegate: retainDelegate)
     }
    
     /**
@@ -140,7 +176,7 @@ public class DelegateProxy : _RXDelegateProxy {
     
     deinit {
         for v in subjectsForSelector.values {
-            v.on(.Completed)
+            v.on(.completed)
         }
 #if TRACE_RESOURCES
         OSAtomicDecrement32(&resourceCount)
@@ -149,7 +185,7 @@ public class DelegateProxy : _RXDelegateProxy {
 
     // MARK: Pointer
 
-    class func _pointer(p: UnsafePointer<Void>) -> UnsafePointer<Void> {
+    class func _pointer(_ p: UnsafeRawPointer) -> UnsafeRawPointer {
         return p
     }
-}
+}

RxCocoa/Common/DelegateProxyType.swift

@@ -68,9 +68,9 @@ every view has a corresponding delegate virtual factory method.
 
 In case of UITableView / UIScrollView, there is
 
-    extensions UIScrollView {
-        public func rx_createDelegateProxy() -> RxScrollViewDelegateProxy {
-            return RxScrollViewDelegateProxy(view: self)
+    extension UIScrollView {
+        public func createRxDelegateProxy() -> RxScrollViewDelegateProxy {
+            return RxScrollViewDelegateProxy(parentObject: base)
         }
     ....
 
@@ -78,7 +78,7 @@ In case of UITableView / UIScrollView, there is
 and override in UITableView
 
     extension UITableView {
-        public override func rx_createDelegateProxy() -> RxScrollViewDelegateProxy {
+        public override func createRxDelegateProxy() -> RxScrollViewDelegateProxy {
         ....
 
 
@@ -87,7 +87,7 @@ public protocol DelegateProxyType : AnyObject {
     /**
     Creates new proxy for target object.
     */
-    static func createProxyForObject(object: AnyObject) -> AnyObject
+    static func createProxyForObject(_ object: AnyObject) -> AnyObject
    
     /**
     Returns assigned proxy for object.
@@ -95,7 +95,7 @@ public protocol DelegateProxyType : AnyObject {
     - parameter object: Object that can have assigned delegate proxy.
     - returns: Assigned delegate proxy or `nil` if no delegate proxy is assigned.
     */
-    static func assignedProxyFor(object: AnyObject) -> AnyObject?
+    static func assignedProxyFor(_ object: AnyObject) -> AnyObject?
     
     /**
     Assigns proxy to object.
@@ -103,7 +103,7 @@ public protocol DelegateProxyType : AnyObject {
     - parameter object: Object that can have assigned delegate proxy.
     - parameter proxy: Delegate proxy object to assign to `object`.
     */
-    static func assignProxy(proxy: AnyObject, toObject object: AnyObject)
+    static func assignProxy(_ proxy: AnyObject, toObject object: AnyObject)
     
     /**
     Returns designated delegate property for object.
@@ -115,7 +115,7 @@ public protocol DelegateProxyType : AnyObject {
     - parameter object: Object that has delegate property.
     - returns: Value of delegate property.
     */
-    static func currentDelegateFor(object: AnyObject) -> AnyObject?
+    static func currentDelegateFor(_ object: AnyObject) -> AnyObject?
 
     /**
     Sets designated delegate property for object.
@@ -127,7 +127,7 @@ public protocol DelegateProxyType : AnyObject {
     - parameter toObject: Object that has delegate property.
     - parameter delegate: Delegate value.
     */
-    static func setCurrentDelegate(delegate: AnyObject?, toObject object: AnyObject)
+    static func setCurrentDelegate(_ delegate: AnyObject?, toObject object: AnyObject)
     
     /**
     Returns reference of normal delegate that receives all forwarded messages
@@ -144,88 +144,115 @@ public protocol DelegateProxyType : AnyObject {
     - parameter forwardToDelegate: Reference of delegate that receives all messages through `self`.
     - parameter retainDelegate: Should `self` retain `forwardToDelegate`.
     */
-    func setForwardToDelegate(forwardToDelegate: AnyObject?, retainDelegate: Bool)
+    func setForwardToDelegate(_ forwardToDelegate: AnyObject?, retainDelegate: Bool)
 }
 
-/**
-Returns existing proxy for object or installs new instance of delegate proxy.
-
-- parameter object: Target object on which to install delegate proxy.
-- returns: Installed instance of delegate proxy.
-
-
-    extension UISearchBar {
-
-        public var rx_delegate: DelegateProxy {
-            return proxyForObject(RxSearchBarDelegateProxy.self, self)
-        }
-        
-        public var rx_text: ControlProperty<String> {
-            let source: Observable<String> = self.rx_delegate.observe("searchBar:textDidChange:")
-            ...
-        }
-    }
-*/
-public func proxyForObject<P: DelegateProxyType>(type: P.Type, _ object: AnyObject) -> P {
-    MainScheduler.ensureExecutingOnScheduler()
-    
-    let maybeProxy = P.assignedProxyFor(object) as? P
-    
-    let proxy: P
-    if maybeProxy == nil {
-        proxy = P.createProxyForObject(object) as! P
-        P.assignProxy(proxy, toObject: object)
-        assert(P.assignedProxyFor(object) === proxy)
-    }
-    else {
-        proxy = maybeProxy!
-    }
-    
-    let currentDelegate: AnyObject? = P.currentDelegateFor(object)
-    
-    if currentDelegate !== proxy {
-        proxy.setForwardToDelegate(currentDelegate, retainDelegate: false)
-        P.setCurrentDelegate(proxy, toObject: object)
-        assert(P.currentDelegateFor(object) === proxy)
-        assert(proxy.forwardToDelegate() === currentDelegate)
-    }
-        
-    return proxy
+@available(*, deprecated:2.5, renamed:"DelegateProxyType.proxyForObject", message:"You can just use normal static protocol extension. E.g. `RxScrollViewDelegateProxy.proxyForObject`")
+public func proxyForObject<P: DelegateProxyType>(_ type: P.Type, _ object: AnyObject) -> P {
+    return P.proxyForObject(object)
 }
 
-func installDelegate<P: DelegateProxyType>(proxy: P, delegate: AnyObject, retainDelegate: Bool, onProxyForObject object: AnyObject) -> Disposable {
-    weak var weakDelegate: AnyObject? = delegate
-    
-    assert(proxy.forwardToDelegate() === nil, "There is already a delegate set -> `\(proxy.forwardToDelegate())` for object -> `\(object)`.\nMaybe delegate was already set in `xib` or `storyboard` and now it's being overwritten in code.")
-    
-    proxy.setForwardToDelegate(delegate, retainDelegate: retainDelegate)
-    
-    // refresh properties after delegate is set
-    // some views like UITableView cache `respondsToSelector`
-    P.setCurrentDelegate(nil, toObject: object)
-    P.setCurrentDelegate(proxy, toObject: object)
-    
-    assert(proxy.forwardToDelegate() === delegate, "Setting of delegate failed")
-    
-    return AnonymousDisposable {
+extension DelegateProxyType {
+    /**
+     Returns existing proxy for object or installs new instance of delegate proxy.
+
+     - parameter object: Target object on which to install delegate proxy.
+     - returns: Installed instance of delegate proxy.
+
+
+         extension Reactive where Base: UISearchBar {
+
+             public var delegate: DelegateProxy {
+                return RxSearchBarDelegateProxy.proxyForObject(base)
+             }
+
+             public var text: ControlProperty<String> {
+                 let source: Observable<String> = self.delegate.observe(#selector(UISearchBarDelegate.searchBar(_:textDidChange:)))
+                 ...
+             }
+         }
+    */
+    public static func proxyForObject(_ object: AnyObject) -> Self {
         MainScheduler.ensureExecutingOnScheduler()
+
+        let maybeProxy = Self.assignedProxyFor(object) as? Self
+
+        let proxy: Self
+        if let existingProxy = maybeProxy {
+            proxy = existingProxy
+        }
+        else {
+            proxy = Self.createProxyForObject(object) as! Self
+            Self.assignProxy(proxy, toObject: object)
+            assert(Self.assignedProxyFor(object) === proxy)
+        }
+
+        let currentDelegate: AnyObject? = Self.currentDelegateFor(object)
+
+        if currentDelegate !== proxy {
+            proxy.setForwardToDelegate(currentDelegate, retainDelegate: false)
+            assert(proxy.forwardToDelegate() === currentDelegate)
+            Self.setCurrentDelegate(proxy, toObject: object)
+            assert(Self.currentDelegateFor(object) === proxy)
+            assert(proxy.forwardToDelegate() === currentDelegate)
+        }
         
-        let delegate: AnyObject? = weakDelegate
+        return proxy
+    }
+
+    /**
+    Sets forward delegate for `DelegateProxyType` associated with a specific object and return disposable that can be used to unset the forward to delegate.
+    Using this method will also make sure that potential original object cached selectors are cleared and will report any accidental forward delegate mutations.
+     
+    - parameter forwardDelegate: Delegate object to set.
+    - parameter retainDelegate: Retain `forwardDelegate` while it's being set.
+    - parameter onProxyForObject: Object that has `delegate` property.
+    - returns: Disposable object that can be used to clear forward delegate.
+    */
+    public static func installForwardDelegate(_ forwardDelegate: AnyObject, retainDelegate: Bool, onProxyForObject object: AnyObject) -> Disposable {
+        weak var weakForwardDelegate: AnyObject? = forwardDelegate
+
+        let proxy = Self.proxyForObject(object)
         
-        assert(delegate == nil || proxy.forwardToDelegate() === delegate, "Delegate was changed from time it was first set. Current \(proxy.forwardToDelegate()), and it should have been \(proxy)")
+        assert(proxy.forwardToDelegate() === nil, "This is a feature to warn you that there is already a delegate (or data source) set somewhere previously. The action you are trying to perform will clear that delegate (data source) and that means that some of your features that depend on that delegate (data source) being set will likely stop working.\n" +
+            "If you are ok with this, try to set delegate (data source) to `nil` in front of this operation.\n" +
+            " This is the source object value: \(object)\n" +
+            " This this the original delegate (data source) value: \(proxy.forwardToDelegate()!)\n" +
+            "Hint: Maybe delegate was already set in xib or storyboard and now it's being overwritten in code.\n")
+
+        proxy.setForwardToDelegate(forwardDelegate, retainDelegate: retainDelegate)
         
-        proxy.setForwardToDelegate(nil, retainDelegate: retainDelegate)
+        // refresh properties after delegate is set
+        // some views like UITableView cache `respondsToSelector`
+        Self.setCurrentDelegate(nil, toObject: object)
+        Self.setCurrentDelegate(proxy, toObject: object)
+        
+        assert(proxy.forwardToDelegate() === forwardDelegate, "Setting of delegate failed:\ncurrent:\n\(proxy.forwardToDelegate())\nexpected:\n\(forwardDelegate)")
+        
+        return Disposables.create {
+            MainScheduler.ensureExecutingOnScheduler()
+            
+            let delegate: AnyObject? = weakForwardDelegate
+            
+            assert(delegate == nil || proxy.forwardToDelegate() === delegate, "Delegate was changed from time it was first set. Current \(proxy.forwardToDelegate()), and it should have been \(proxy)")
+            
+            proxy.setForwardToDelegate(nil, retainDelegate: retainDelegate)
+        }
     }
 }
 
 extension ObservableType {
-    func subscribeProxyDataSourceForObject<P: DelegateProxyType>(object: AnyObject, dataSource: AnyObject, retainDataSource: Bool, binding: (P, Event<E>) -> Void)
+    func subscribeProxyDataSource<P: DelegateProxyType>(ofObject object: AnyObject, dataSource: AnyObject, retainDataSource: Bool, binding: @escaping (P, Event<E>) -> Void)
         -> Disposable {
-        let proxy = proxyForObject(P.self, object)
-        let disposable = installDelegate(proxy, delegate: dataSource, retainDelegate: retainDataSource, onProxyForObject: object)
+        let proxy = P.proxyForObject(object)
+        let disposable = P.installForwardDelegate(dataSource, retainDelegate: retainDataSource, onProxyForObject: object)
 
         let subscription = self.asObservable()
-            // source can't ever end, otherwise it will release the subscriber
+            .catchError { error in
+                bindingErrorToInterface(error)
+                return Observable.empty()
+            }
+            // source can never end, otherwise it would release the subscriber, and deallocate the data source
             .concat(Observable.never())
             .subscribe { [weak object] (event: Event<E>) in
                 MainScheduler.ensureExecutingOnScheduler()
@@ -237,16 +264,16 @@ extension ObservableType {
                 binding(proxy, event)
                 
                 switch event {
-                case .Error(let error):
+                case .error(let error):
                     bindingErrorToInterface(error)
                     disposable.dispose()
-                case .Completed:
+                case .completed:
                     disposable.dispose()
                 default:
                     break
                 }
             }
             
-        return StableCompositeDisposable.create(subscription, disposable)
+        return Disposables.create(subscription, disposable)
     }
 }

RxCocoa/Common/KVORepresentable+Swift.swift

@@ -15,7 +15,7 @@ extension Int : KVORepresentable {
      Constructs `Self` using KVO value.
      */
     public init?(KVOValue: KVOType) {
-        self.init(KVOValue.integerValue)
+        self.init(KVOValue.int32Value)
     }
 }
 
@@ -26,7 +26,7 @@ extension Int32 : KVORepresentable {
      Constructs `Self` using KVO value.
      */
     public init?(KVOValue: KVOType) {
-        self.init(KVOValue.intValue)
+        self.init(KVOValue.int32Value)
     }
 }
 
@@ -37,7 +37,7 @@ extension Int64 : KVORepresentable {
      Constructs `Self` using KVO value.
      */
     public init?(KVOValue: KVOType) {
-        self.init(KVOValue.longLongValue)
+        self.init(KVOValue.int64Value)
     }
 }
 
@@ -48,7 +48,7 @@ extension UInt : KVORepresentable {
      Constructs `Self` using KVO value.
      */
     public init?(KVOValue: KVOType) {
-        self.init(KVOValue.unsignedLongValue)
+        self.init(KVOValue.uintValue)
     }
 }
 
@@ -59,7 +59,7 @@ extension UInt32 : KVORepresentable {
      Constructs `Self` using KVO value.
      */
     public init?(KVOValue: KVOType) {
-        self.init(KVOValue.unsignedIntValue)
+        self.init(KVOValue.uint32Value)
     }
 }
 
@@ -70,7 +70,7 @@ extension UInt64 : KVORepresentable {
      Constructs `Self` using KVO value.
      */
     public init?(KVOValue: KVOType) {
-        self.init(KVOValue.unsignedLongLongValue)
+        self.init(KVOValue.uint64Value)
     }
 }
 
@@ -90,4 +90,4 @@ extension RawRepresentable where RawValue: KVORepresentable {
 
         self.init(rawValue: rawValue)
     }
-}
+}

RxCocoa/Common/Logging.swift

@@ -12,7 +12,7 @@ import Foundation
 Simple logging settings for RxCocoa library.
 */
 public struct Logging {
-    public typealias LogURLRequest = (NSURLRequest) -> Bool
+    public typealias LogURLRequest = (URLRequest) -> Bool
     
     /**
     Log URL requests to standard output in curl format.
@@ -24,4 +24,4 @@ public struct Logging {
         return false
     #endif
     }
-}
+}

RxCocoa/Common/NSLayoutConstraint+Rx.swift

@@ -19,12 +19,12 @@ import RxSwift
 #endif
 
 #if os(iOS) || os(OSX) || os(tvOS)
-extension NSLayoutConstraint {
+extension Reactive where Base: NSLayoutConstraint {
     /**
      Bindable sink for `constant` property.
      */
-    public var rx_constant: AnyObserver<CGFloat> {
-        return UIBindingObserver(UIElement: self) { constraint, constant in
+    public var constant: AnyObserver<CGFloat> {
+        return UIBindingObserver(UIElement: self.base) { constraint, constant in
             constraint.constant = constant
         }.asObserver()
     }
@@ -33,9 +33,9 @@ extension NSLayoutConstraint {
      Bindable sink for `active` property.
      */
     @available(iOS 8, OSX 10.10, *)
-    public var rx_active: AnyObserver<Bool> {
-        return UIBindingObserver(UIElement: self) { constraint, value in
-            constraint.active = value
+    public var active: AnyObserver<Bool> {
+        return UIBindingObserver(UIElement: self.base) { constraint, value in
+            constraint.isActive = value
         }.asObserver()
     }
 }

RxCocoa/Common/Observable+Bind.swift

@@ -22,8 +22,8 @@ extension ObservableType {
     - parameter observer: Observer that receives events.
     - returns: Disposable object that can be used to unsubscribe the observer.
     */
-    @warn_unused_result(message="http://git.io/rxs.ud")
-    public func bindTo<O: ObserverType where O.E == E>(observer: O) -> Disposable {
+    // @warn_unused_result(message: "http://git.io/rxs.ud")
+    public func bindTo<O: ObserverType>(_ observer: O) -> Disposable where O.E == E {
         return self.subscribe(observer)
     }
 
@@ -36,20 +36,20 @@ extension ObservableType {
     - parameter variable: Target variable for sequence elements.
     - returns: Disposable object that can be used to unsubscribe the observer.
     */
-    @warn_unused_result(message="http://git.io/rxs.ud")
-    public func bindTo(variable: Variable<E>) -> Disposable {
+    // @warn_unused_result(message: "http://git.io/rxs.ud")
+    public func bindTo(_ variable: Variable<E>) -> Disposable {
         return subscribe { e in
             switch e {
-            case let .Next(element):
+            case let .next(element):
                 variable.value = element
-            case let .Error(error):
+            case let .error(error):
                 let error = "Binding error to variable: \(error)"
             #if DEBUG
                 rxFatalError(error)
             #else
                 print(error)
             #endif
-            case .Completed:
+            case .completed:
                 break
             }
         }
@@ -61,8 +61,8 @@ extension ObservableType {
     - parameter binder: Function used to bind elements from `self`.
     - returns: Object representing subscription.
     */
-    @warn_unused_result(message="http://git.io/rxs.ud")
-    public func bindTo<R>(binder: Self -> R) -> R {
+    // @warn_unused_result(message: "http://git.io/rxs.ud")
+    public func bindTo<R>(_ binder: (Self) -> R) -> R {
         return binder(self)
     }
 
@@ -78,8 +78,8 @@ extension ObservableType {
     - parameter curriedArgument: Final argument passed to `binder` to finish binding process.
     - returns: Object representing subscription.
     */
-    @warn_unused_result(message="http://git.io/rxs.ud")
-    public func bindTo<R1, R2>(binder: Self -> R1 -> R2, curriedArgument: R1) -> R2 {
+    // @warn_unused_result(message: "http://git.io/rxs.ud")
+    public func bindTo<R1, R2>(_ binder: (Self) -> (R1) -> R2, curriedArgument: R1) -> R2 {
          return binder(self)(curriedArgument)
     }
     
@@ -93,8 +93,8 @@ extension ObservableType {
     - parameter onNext: Action to invoke for each element in the observable sequence.
     - returns: Subscription object used to unsubscribe from the observable sequence.
     */
-    @warn_unused_result(message="http://git.io/rxs.ud")
-    public func bindNext(onNext: E -> Void) -> Disposable {
+    // @warn_unused_result(message: "http://git.io/rxs.ud")
+    public func bindNext(_ onNext: @escaping (E) -> Void) -> Disposable {
         return subscribe(onNext: onNext, onError: { error in
             let error = "Binding error: \(error)"
             #if DEBUG

RxCocoa/Common/Observables/Implementations/ControlTarget.swift

@@ -45,9 +45,9 @@ class ControlTarget: RxTarget {
 
         super.init()
 
-        control.addTarget(self, action: selector, forControlEvents: controlEvents)
+        control.addTarget(self, action: selector, for: controlEvents)
 
-        let method = self.methodForSelector(selector)
+        let method = self.method(for: selector)
         if method == nil {
             rxFatalError("Can't find method")
         }
@@ -64,15 +64,15 @@ class ControlTarget: RxTarget {
         control.target = self
         control.action = selector
 
-        let method = self.methodForSelector(selector)
+        let method = self.method(for: selector)
         if method == nil {
             rxFatalError("Can't find method")
         }
     }
 #endif
 
-    func eventHandler(sender: Control!) {
-        if let callback = self.callback, control = self.control {
+    func eventHandler(_ sender: Control!) {
+        if let callback = self.callback, let control = self.control {
             callback(control)
         }
     }
@@ -80,7 +80,7 @@ class ControlTarget: RxTarget {
     override func dispose() {
         super.dispose()
 #if os(iOS) || os(tvOS)
-        self.control?.removeTarget(self, action: self.selector, forControlEvents: self.controlEvents)
+        self.control?.removeTarget(self, action: self.selector, for: self.controlEvents)
 #elseif os(OSX)
         self.control?.target = nil
         self.control?.action = nil

RxCocoa/Common/Observables/Implementations/DeallocObservable.swift

@@ -12,13 +12,13 @@ import RxSwift
 #endif
 
 class DeallocObservable {
-    let _subject = ReplaySubject<Void>.create(bufferSize: 1)
+    let _subject = ReplaySubject<Void>.create(bufferSize:1)
 
     init() {
     }
 
     deinit {
-        _subject.on(.Next(()))
-        _subject.on(.Completed)
+        _subject.on(.next(()))
+        _subject.on(.completed)
     }
 }

RxCocoa/Common/Observables/Implementations/KVOObservable.swift

@@ -33,32 +33,29 @@ class KVOObservable<Element>
         }
     }
     
-    func subscribe<O : ObserverType where O.E == Element?>(observer: O) -> Disposable {
+    func subscribe<O : ObserverType>(_ observer: O) -> Disposable where O.E == Element? {
         let observer = KVOObserver(parent: self) { (value) in
             if value as? NSNull != nil {
-                observer.on(.Next(nil))
+                observer.on(.next(nil))
                 return
             }
-            observer.on(.Next(value as? Element))
+            observer.on(.next(value as? Element))
         }
         
-        return AnonymousDisposable {
-            observer.dispose()
-        }
+        return Disposables.create(with: observer.dispose)
     }
     
 }
 
 #if !DISABLE_SWIZZLING
 
-func observeWeaklyKeyPathFor(target: NSObject, keyPath: String, options: NSKeyValueObservingOptions) -> Observable<AnyObject?> {
-    let components = keyPath.componentsSeparatedByString(".").filter { $0 != "self" }
+func observeWeaklyKeyPathFor(_ target: NSObject, keyPath: String, options: NSKeyValueObservingOptions) -> Observable<AnyObject?> {
+    let components = keyPath.components(separatedBy: ".").filter { $0 != "self" }
     
     let observable = observeWeaklyKeyPathFor(target, keyPathSections: components, options: options)
-        .distinctUntilChanged { $0 === $1 }
         .finishWithNilWhenDealloc(target)
  
-    if !options.intersect(.Initial).isEmpty {
+    if !options.intersection(.initial).isEmpty {
         return observable
     }
     else {
@@ -71,14 +68,14 @@ func observeWeaklyKeyPathFor(target: NSObject, keyPath: String, options: NSKeyVa
 // Identifiers can't contain `,`, so the only place where `,` can appear
 // is as a delimiter.
 // This means there is `W` as element in an array of property attributes.
-func isWeakProperty(properyRuntimeInfo: String) -> Bool {
-    return properyRuntimeInfo.rangeOfString(",W,") != nil
+func isWeakProperty(_ properyRuntimeInfo: String) -> Bool {
+    return properyRuntimeInfo.range(of: ",W,") != nil
 }
 
 extension ObservableType where E == AnyObject? {
-    func finishWithNilWhenDealloc(target: NSObject)
+    func finishWithNilWhenDealloc(_ target: NSObject)
         -> Observable<AnyObject?> {
-        let deallocating = target.rx_deallocating
+        let deallocating = target.rx.deallocating
             
         return deallocating
             .map { _ in
@@ -90,7 +87,7 @@ extension ObservableType where E == AnyObject? {
 }
 
 func observeWeaklyKeyPathFor(
-        target: NSObject,
+        _ target: NSObject,
         keyPathSections: [String],
         options: NSKeyValueObservingOptions
     ) -> Observable<AnyObject?> {
@@ -102,13 +99,13 @@ func observeWeaklyKeyPathFor(
     
     let property = class_getProperty(object_getClass(target), propertyName)
     if property == nil {
-        return Observable.error(RxCocoaError.InvalidPropertyName(object: target, propertyName: propertyName))
+        return Observable.error(RxCocoaError.invalidPropertyName(object: target, propertyName: propertyName))
     }
     let propertyAttributes = property_getAttributes(property)
     
     // should dealloc hook be in place if week property, or just create strong reference because it doesn't matter
-    let isWeak = isWeakProperty(String.fromCString(propertyAttributes) ?? "")
-    let propertyObservable = KVOObservable(object: target, keyPath: propertyName, options: options.union(.Initial), retainTarget: false) as KVOObservable<AnyObject>
+    let isWeak = isWeakProperty(propertyAttributes.map(String.init) ?? "")
+    let propertyObservable = KVOObservable(object: target, keyPath: propertyName, options: options.union(.initial), retainTarget: false) as KVOObservable<AnyObject>
     
     // KVO recursion for value changes
     return propertyObservable
@@ -121,7 +118,7 @@ func observeWeaklyKeyPathFor(
             let strongTarget: AnyObject? = weakTarget
             
             if nextObject == nil {
-                return Observable.error(RxCocoaError.InvalidObjectOnKeyPath(object: nextTarget!, sourceObject: strongTarget ?? NSNull(), propertyName: propertyName))
+                return Observable.error(RxCocoaError.invalidObjectOnKeyPath(object: nextTarget!, sourceObject: strongTarget ?? NSNull(), propertyName: propertyName))
             }
 
             // if target is alive, then send change

RxCocoa/Common/Observables/Implementations/KVOObserver.swift

@@ -20,7 +20,7 @@ protocol KVOObservableProtocol {
 
 class KVOObserver : _RXKVOObserver
                   , Disposable {
-    typealias Callback = (AnyObject?) -> Void
+    typealias Callback = @escaping (Any?) -> Void
 
     var retainSelf: KVOObserver? = nil
 
@@ -43,4 +43,4 @@ class KVOObserver : _RXKVOObserver
         OSAtomicDecrement32(&resourceCount)
     #endif
     }
-}
+}

RxCocoa/Common/Observables/Implementations/MessageSentObserver.swift

@@ -29,8 +29,8 @@ import Foundation
         init() {
         }
 
-        @objc func messageSentWithParameters(parameters: [AnyObject]) -> Void {
-            _subject.on(.Next())
+        @objc func messageSent(withParameters parameters: [Any]) -> Void {
+            _subject.on(.next())
         }
 
         func asObservable() -> Observable<()> {
@@ -38,7 +38,7 @@ import Foundation
         }
 
         deinit {
-            _subject.on(.Completed)
+            _subject.on(.completed)
         }
     }
 
@@ -58,8 +58,8 @@ import Foundation
         init() {
         }
 
-        @objc func messageSentWithParameters(parameters: [AnyObject]) -> Void {
-            _subject.on(.Next(parameters))
+        @objc func messageSent(withParameters parameters: [Any]) -> Void {
+            _subject.on(.next(parameters as [AnyObject]))
         }
 
         func asObservable() -> Observable<[AnyObject]> {
@@ -67,7 +67,7 @@ import Foundation
         }
 
         deinit {
-            _subject.on(.Completed)
+            _subject.on(.completed)
         }
     }
 

RxCocoa/Common/Observables/NSNotificationCenter+Rx.swift

@@ -11,7 +11,7 @@ import Foundation
 import RxSwift
 #endif
 
-extension NSNotificationCenter {
+extension Reactive where Base: NotificationCenter {
     /**
     Transforms notifications posted to notification center to observable sequence of notifications.
     
@@ -19,16 +19,16 @@ extension NSNotificationCenter {
     - parameter object: Optional object used to filter notifications.
     - returns: Observable sequence of posted notifications.
     */
-    @warn_unused_result(message="http://git.io/rxs.uo")
-    public func rx_notification(name: String?, object: AnyObject? = nil) -> Observable<NSNotification> {
+    // @warn_unused_result(message:"http://git.io/rxs.uo")
+    public func notification(_ name: Notification.Name, object: AnyObject? = nil) -> Observable<Notification> {
         return Observable.create { [weak object] observer in
-            let nsObserver = self.addObserverForName(name, object: object, queue: nil) { notification in
-                observer.on(.Next(notification))
+            let nsObserver = self.base.addObserver(forName: name, object: object, queue: nil) { notification in
+                observer.on(.next(notification))
             }
             
-            return AnonymousDisposable {
-                self.removeObserver(nsObserver)
+            return Disposables.create {
+                self.base.removeObserver(nsObserver)
             }
         }
     }
-}
+}