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πŸ‘œ A standard for Swift callbacks that enables lightweight observables and iterables

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Callbag

CI Status Version License Platform

This is an implemented Callbag protocol founded by AndrΓ© Staltz in Swift.

Specification

  Talkback  = (_ payload:Any?) -> Void
  Sink<T>   = (_ payload:Payload<T>) -> Void
  Source<T> = (_ sink:Sink<T>) -> Void;

Functions have been implemented

Factories

  • fromArray
  • fromInterval
  • fromSubject
  • makeReplaySubject
  • makeSubject
  • create
  • empty
  • never

Sink factories

  • subscribe

Operators

  • map
  • flatmap
  • filter
  • take
  • first
  • skip
  • last
  • scan
  • merge
  • combine

Example

To run the example project, clone the repo, and run pod install from the Example directory first.

Reactive programming examples

Pick the first 5 odd numbers from a clock that ticks every second, then start observing them:

   fromInterval(1)
      => map{ $0   1}
      => filter{ $0 % 2 != 0}
      => take(5)
      => forEach{ print($0)}
   //1
   //3
   //5
   //7
   //9

From a array

    fromArray([1,2,3,4,5,6,7,8,9]) // 1, 2, 3, 4, 5, 6, 7, 8, 9,
       => filter{ $0 % 2 == 0}    // 2, 4, 6, 8
       => map { $0 * 2}           // 4, 8, 12, 16
       => subscribe{ print($0)}
        
    //4
    //8
    //12
    //16

Installation

Callbag is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod 'Callbag'

References

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πŸ‘œ A standard for Swift callbacks that enables lightweight observables and iterables

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