new roundValue

LeadKit/LeadKit/Extensions/Double/Double+Rounding.swift

@@ -11,31 +11,34 @@ import Foundation
 public extension Double {
 
     /**
-     rounds double value 1.7860000004 to 1.79
+     Type of rounding double value
 
-     - parameter val:       value for rounding
-     - parameter persicion: important number of digits after comma
-
-     - returns: rounded value
+     - Normal: From 167.567 you will get 167.6
+     - Down:   From 167.567 you will get 167.5
      */
-    public func roundValue(withPersicion persicion: UInt) -> Double {
-        let divider = pow(10.0, Double(persicion))
-
-        return round(self * divider) / divider
+    public enum RoundingType {
+        case Normal
+        case Down
     }
 
     /**
-     discard dractional part double value 1.7860000004 to 1.78
+     Rounding of double value
 
-     - parameter val:       value for discarding dractional part
      - parameter persicion: important number of digits after comma
+     - parameter roundType: rounding type
 
-     - returns: value with discarded dractional part
+     - returns: rounded value
      */
-    func discardFractionalTo(number: Int) -> Double {
-        let divider = pow(10.0, Double(number))
-        let roundedNumber = Double(Int(self * divider)) / divider
-        return roundedNumber
+    public func roundValue(withPersicion persicion: UInt,
+                                                roundType: RoundingType = .Normal) -> Double {
+        let divider = pow(10.0, Double(persicion))
+
+        switch roundType {
+        case .Normal:
+            return round(self * divider) / divider
+        case .Down:
+            return Double(Int(self * divider)) / divider
+        }
     }
 
 }