Tyrannosaurus Rx

Basic overview of Rx (Reactive Extensions)

Transcript

1. TYRANNOSAURUS RX
2. REACTIVE EXTENSIONS
4. Java JS C# Clojure Groovy Scala Kotlin Python Ruby C++ Haskell
5. var list = [1,2,3,4,5,6,7]; ! for(var i = 0; i < list.length; i++) { console.log(list[i]) }
6. var list = [1,2,3,4,5,6,7]; ! list.forEach(function(item) { console.log(item) })
7. var list = [Promise(), Promise()…]; ! list.forEach(function(item) { console.log(item.get()) })
8. TIME RUINS EVERYTHING
12. OBSERVABLES LISTS WITH TIME REIFIED EVENT STREAM PUSH BASED
13. CREATING OBSERVABLES ITERABLE FUTURE/PROMISE EVENTS RULES OBSERVABLE
14. CREATING OBSERVABLES Observable.from(new String[] { "The Joker", "The Riddler", "Penguin", "Catwoman"})
15. CREATING OBSERVABLES baddies.subscribe((baddie) -> { out.println(baddie + “ is bad.”) })
16. CREATING OBSERVABLES The Joker is bad. The Riddler is bad. Penguin is bad. Catwoman is bad.
17. CREATING OBSERVABLES class _ extends Subscriber<String> { void onCompleted() {} void onError(Throwable t) {} void onNext(String s){} }
18. CREATING OBSERVABLES onNext("The Joker”)
19. CREATING OBSERVABLES onNext("The Joker”) onNext("The Riddler”)
20. CREATING OBSERVABLES onNext("The Joker”) onNext("The Riddler”) onNext(“Penguin")
21. CREATING OBSERVABLES onNext("The Joker”) onNext("The Riddler”) onNext(“Penguin") onNext(“Catwoman")
22. CREATING OBSERVABLES onCompleted() onNext("The Joker”) onNext("The Riddler”) onNext(“Penguin") onNext(“Catwoman")
23. ERROR HANDLING onNext("The Joker”)
24. onNext("The Joker”) onNext("The Riddler”) ERROR HANDLING
25. X onNext("The Joker”) onNext("The Riddler”) ERROR HANDLING
26. X onNext("The Joker”) onNext("The Riddler”) onError(ex) ERROR HANDLING
27. TRANSFORMING OBSERVABLES TURN AN OBSERVABLE OF ONE TYPE INTO ANOTHER
28. TRANSFORMING OBSERVABLES Observable ints = Observable .interval(1, SECONDS); ! ints.map((i) -> i + 1) .map((i) -> i + “ seconds”) .subscribe(out::println)
29. TRANSFORMING OBSERVABLES map map
30. TRANSFORMING OBSERVABLES 1 seconds 2 seconds 3 seconds 4 seconds ...
31. TRANSFORMING OBSERVABLES flatMap(), groupBy(), buffer(), window()
32. FILTERING OBSERVABLES SELECT AND REJECT ITEMS EMITTED BY AN OBSERVABLE
33. FILTERING OBSERVABLES var keys = Rx.DOM.keypress(el) var ints = keys.filter(isNumeric) ! ints.subscribe(console.log)
34. FILTERING OBSERVABLES filter X X
35. FILTERING OBSERVABLES distinct(), timeout(), ignoreElements(), throttleFirst(), debounce(), sample(), first(), last(), take(), skip()
36. COMBINING OBSERVABLES COMPOSING MULTIPLE OBSERVABLES INTO A SINGLE OBSERVABLE
37. COMBINING OBSERVABLES Observable goodies = Observable.from( new String[]{ "Batman", "Robin", "Alfred", “Batgirl"}); ! goodies.zipWith(baddies, (g,b) -> g + " punches " + b)
38. COMBINING OBSERVABLES zipWith
39. COMBINING OBSERVABLES Batman punches The Joker Robin punches The Riddler Alfred punches Penguin Batgirl punches Catwoman
40. STUFF AND OTHER THINGS retry(), delay(), timestamp(), amb(), defaultIfEmpty(), reduce(), count()
42. TYRANNOSAURUS RX