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Using Future

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Avatar for DAloG DAloG
November 01, 2015
Programming
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Using Future

I will try to explore concept of Async state and Future monad

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DAloG

November 01, 2015
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Transcript

  1. USING FUTURES @daloog

  2. ABOUT skype: nobidon [email protected] https://speakerdeck.com/dalog

  3. ASYNC VS PARALLEL

  4. ASYNC DO THINGS AT DEFERENT TIME

  5. PARALLEL DO THINGS AT THE SAME TIME

  6. GCD

  7. GCD

  8. NSOPERATION

  9. NSOPERATION

  10. [ _ TARGET: ACTION: ]

  11. DELEGATE

  12. STRATEGY AND CALLBACK

  13. BLOCK

  14. CALLBACK!!!

  15. SIGNATURE DANCE

  16. None
  17. None
  18. None
  19. None
  20. None
  21. None
  22. None
  23. None
  24. None
  25. None

  26. SEPARATE WORK FROM RESULT DELIVERY

  27. SETTER

  28. T -> ()

  29. GETTER

  30. () -> T

  31. T -> U IS (GET, SET) -> ()

  32. T -> U (() -> T, U -> ()) ->

    ()
  33. None

  34. ASYNC?

  35. ASYNC GETTER

  36. () -> T (T -> ()) -> () SET ->

    ()

  37. SET<T> -> () FUTURE<T>

  38. ASYNC SETTER

  39. T -> () () -> (T -> ()) () ->

    SET

  40. () -> SET<T> PROMISE<T>

  41. GETTER + SETTER = STATE

  42. PROMISE + FUTURE = ASYNC STATE

  43. ASYNC STATE >>> STATE

  44. WHY THIS IS SO HARD???

  45. ACTUALLY NOT

  46. THINK ABOUT FUTURE AS A BOX

  47. BOX WILL BE OPENED. SOMEDAY. MAYBE.

  48. A = B C = A

  49. CHAIN?

  50. T -> U U -> K T -> K

  51. T -> F<U>
 U -> F<K> T -> F<K>

  52. (F<U> , U -> F<K>) -> F<K>

  53. AND THEN

  54. FLAT MAP

  55. ERROR?

  56. TRY<T, E>

  57. FUTURE<T, E> = FUTURE<TRY<T, E>>

  58. WHAT CAN BE FUTURE?

  59. ANYTHING

  60. UI

  61. USING FUTURES FOR REVERSING UI FLOW. HTTPS://MEDIUM.COM/P/D3F5B7CA32D9/ EDIT

  62. VM -> F<ACTION>

  63. NETWORK BLUETOOTH …

  64. EXPOSE F<> AS PUBLIC API

  65. ALWAYS

  66. USE ANY LIB • https://github.com/BoltsFramework/Bolts-iOS • https://github.com/mxcl/PromiseKit • https://github.com/Thomvis/BrightFutures •

    https://realm.io/news/swift-summit-javier-soto-futures/ • https://realm.io/news/swift-tasks-nevyn-bengtsson/

  67. ALL LIBS EQUAL ITS JUST ASYNC STATE

  68. FUTURE / PROMISE ASYNC GET/SET