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RxSwift Xcoders Riga meetup

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Avatar for Kristaps Grinbergs Kristaps Grinbergs
January 23, 2019
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RxSwift Xcoders Riga meetup

Avatar for Kristaps Grinbergs

Kristaps Grinbergs

January 23, 2019
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Transcript

  1. RxSwift Introduction to reactive programming Kristaps Grinbergs @fassko

  2. RxSwift isn't KVO, ReactNative or ReactJS

  3. About me • Swift developer at Qminder • BCompSci &

    MComSci unfinished DmCompSci • > 15 years in IT • love open source
  4. None
  5. None

  6. Agenda • What is Rx • RxSwift and building blocks

    • Examples • Pros and Cons

  7. Imperative programming • Saved state • Order of execution •

    Side effects

  8. In computing, reactive programming is a programming paradigm oriented around

    data flows and the propagation of change. Wikipedia

  9. Reactive programming is programming with asynchronous data streams

  10. Reactive programming • Asynchronous • No saved state • Functional

    • Responsive

  11. ReactiveX An API for asynchronous programming with observable streams. •

    Microsoft (Rx.NET) - 2009 • Supports many languages • RxSwift - 2015

  12. Rx components • Observable • Observers • Schedulers

  13. None
  14. None
  15. None

  16. Observables Completed and Error will terminate the stream Next Completed

    Error

  17. Operators Filtering Transforming Combining

  18. None
  19. None

  20. RxMarbles.com

  21. None

  22. UI bindings RxCocoa

  23. None
  24. None
  25. None
  26. None

  27. Testing • Async XCTest with expectations • RxBlocking making it

    synchronous • Using RxTest and custom Schedulers • https://www.raywenderlich.com/7408-testing-your-rxswift-code • https://www.youtube.com/watch?v=FgbTenGH-P0

  28. + Agile and reusable code Thread safety Eliminate state from

    code Testing Well tested Error handling Large community and extensions Extends MVVM

  29. - Steep learning curve Change previous practices Debugging Testing Over-reactive

    Overhead
  30. None
  31. None

  32. Resources • http://reactivex.io/ • https://github.com/ReactiveX/RxSwift • https://github.com/RxSwiftCommunity • http://adamborek.com/ •

    http://rx-marin.com/ • RayWenderlich RxSwift book • Shai Michal presentations
  33. None