Promises, Futures, and the Shape of Your Code

Transcript

1. @gregheo C1 Mobile
 Summit
2. ++++++++[>++++[>++>+ ++>+++>+<<<<-]>+>+>- >>+[<]<-]>>.>---.+++ ++++..+++.>>.<-.<.++ +.------.--------.>> +.>++.
8. !
9. networker.beginRequest(.read, success: { data in
 })
10. networker.beginRequest(.read, success: { data in
 parser.parseRaw(data) { result in
 } })
11. networker.beginRequest(.read, success: { data in
 parser.parseRaw(data) { result in
 archiver.materialize(from: result) { objects in
 } } })
12. networker.beginRequest(.read, success: { data in
 parser.parseRaw(data) { result in
 archiver.materialize(from: result) { objects in
 dataStore.save(objects) { status in
 } } } })
13. networker.beginRequest(.read, success: { data in
 parser.parseRaw(data) { result in
 archiver.materialize(from: result) { objects in
 dataStore.save(objects) { status in
 print("Save success!") } } } }) print("Hello 1")
 print("Hello 2")
14. ⏰#
16. A B C X Y Z
17. networker.beginRequest(.read, success: { data in
 parser.parseRaw(data) { result in
 archiver.materialize(from: result) { objects in
 dataStore.save(objects) { status in
 print("Save success!") } } } }) print("Hello 1")
 print("Hello 2")
18. ⏰#
19. networker.beginRequest(.read, success: { data in
 parser.parseRaw(data) { result in
 archiver.materialize(from: result) { objects in
 dataStore.save(objects) { status in
 print("Save success!") } } } })
20. Clojure
21. Future
22. (defn square [x]
 (* x x)
 )
23. (defn square [x]
 (future (* x x))
 )
24. (defn saveToDisk [data]
 (future (
 ...
 ))
 )
25. saveToDisk future completed? cancelled? value
26. @myFuture
 
 (deref myFuture)

27. A X Y future B C D (deref future)
28. Future
29. Promise
30. @myPromise
 
 (deref myPromise)

31. getValue promise realized? value promise deliver
32. Promise
33. ❓
34. %&