72 lines
2.5 KiB
Swift
72 lines
2.5 KiB
Swift
/*:
|
|
> # 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`.
|
|
## `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)
|
|
|
|
*/
|
|
example("toArray") {
|
|
let disposeBag = DisposeBag()
|
|
|
|
Observable.range(start: 1, count: 10)
|
|
.toArray()
|
|
.subscribe { print($0) }
|
|
.addDisposableTo(disposeBag)
|
|
}
|
|
/*:
|
|
----
|
|
## `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)
|
|
|
|
*/
|
|
example("reduce") {
|
|
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)
|
|
|
|
*/
|
|
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("🐭")
|
|
}
|
|
|
|
//: [Next](@next) - [Table of Contents](Table_of_Conte |