SwiftのAsync / Awaitについて

第1回 HAKATA.swift ~福岡でSwiftの勉強会~

Transcript

1. SwiftͷAsync / Await ʹ͍ͭͯ 
   
   
   
   
   ౔
   ୈ1ճ HAKATA.swift
2. "CPVU
   NF
3. wΫϥεϝιουגࣜձࣾ
   wϞόΠϧΞϓϦαʔϏε෦
   wJ04ΞϓϦΤϯδχΞ
   wαʔόʔαΠυΞϓϦΤϯδχΞ
   wαʔόʔϨε։ൃ෦
   wΞϓϦέʔγϣϯΤϯδχΞ ాத޹໌ @kongmingtrap
4. wΫϥεϝιουגࣜձࣾ
   wϞόΠϧΞϓϦαʔϏε෦
   wJ04ΞϓϦΤϯδχΞ
   wαʔόʔαΠυΞϓϦΤϯδχΞ
   wαʔόʔϨε։ൃ෦
   wΞϓϦέʔγϣϯΤϯδχΞ ాத޹໌ @kongmingtrap
5. wΫϥεϝιουגࣜձࣾ
   wϞόΠϧΞϓϦαʔϏε෦
   wJ04ΞϓϦΤϯδχΞ
   wαʔόʔαΠυΞϓϦΤϯδχΞ
   wαʔόʔϨε։ൃ෦
   wΞϓϦέʔγϣϯΤϯδχΞ ాத޹໌ @kongmingtrap :".-͸༑ୡʂʂ
6. Ϟνϕʔγϣϯ
8. ձࣾͷۚͰߦ͘
   ւ֎ΧϯϑΝϨϯε͸
   ࠷ߴͩͥʜ
9. 4XJGU
   ͷ
   "TZOD
   
   "XBJU
   ʹ͍ͭͯ
10. Ϟνϕʔγϣϯ
11. IUUQTBXTBNB[PODPNKQBCPVUBXTXIBUTOFXBXTMBNCEB TVQQPSUTOPEFKT
12. IUUQTBXTBNB[PODPNKQBCPVUBXTXIBUTOFXBXTMBNCEB TVQQPSUTOPEFKT
13. ͳΔ΄Ͳ
14. 4XJGU͸
    Ͳ͏ͳ͍ͬͯΔΜͩΖ͏ʁ
15. "TZOD"XBJU
    GPS
    4XJGU
16. "TZOD"XBJU
    GPS
    4XJGU
17. എܠ
18. ඇಉظॲཧʹ·ͭΘΔ
    ՝୊ͷ਺ʑ
19. "TZOD"XBJU
    GPS
    4XJGU ໰୊఺
20. "TZOD"XBJU
    GPS
    4XJGU ໰୊఺ ඇಉظॲཧΛͭͳ͛ཧ৔߹ ͷίʔϧόοΫ஍ࠈ
21. "TZOD"XBJU
    GPS
    4XJGU
22. "TZOD"XBJU
    GPS
    4XJGU ΤϥʔϋϯυϦϯ άͰͷίʔϧόο Ϋ஍ࠈ
23. "TZOD"XBJU
    GPS
    4XJGU ໰୊఺
24. "TZOD"XBJU
    GPS
    4XJGU ໰୊఺ ৚݅෇͖Ͱඇಉظॲཧ Λ࣮ࢪ͍ͨ͠৔߹ɺେ ఍ͷ৔߹ɺίʔυ಺ʹ ΫϩʔδϟΛॻ͘͜ͱ ʹͳΔ
25. "TZOD"XBJU
    GPS
    4XJGU
26. "TZOD"XBJU
    GPS
    4XJGU ޙͷॲཧͰHVBSEͳͲͰ
    ฦΔ஋ͷߟྀΛ๨Εͯ͠ ·͏
    ͦ΋ͦ΋σόοά͠ਏ͍
27. "TZOD"XBJU
    GPS
    4XJGU ໰୊఺
28. "TZOD"XBJU
    GPS
    4XJGU ໰୊఺ ʢϥτφʔࢯͷܦݧଇͱલஔ͖ͭͭ͠ʜʣ
    ඇಉظ"1*Λ࡞ͬͯ΋ɺଟ͘ͷ৔߹͸6*ͷߋ৽ͳͲ ͕བྷΉͨΊɺಉظಈ࡞Ͱߦ͏͜ͱ͕ଟ͍
29. "TZOD"XBJU
    GPS
    4XJGU
30. "TZOD"XBJU
    GPS
    4XJGU ࠶։ՄೳͳॲཧΛඳ͖͍ͨ࣌ɺ4XJGUͷ৔߹ͩͱɺ ஈ֊తʹ஋Λੜ੒͢Δ΋ͷΛͱͯ͠ఆٛ͢Δඞཁ͕ ͋Δ
31. "TZOD
    
    "XBJU
32. wඇಉظॲཧͷߏจ
    w1SPNJTFΛ؆ܿʹهड़Ͱ͖ΔΑ͏ʹͨ͠
    w༷ʑͳݴޠʹΤοηϯε͕औΓࠐ·Ε͍ͯ Δʢ+BWB4DSJQUɺ$ɺ1ZUIPOɺ3VTUʜʣ "TZOD"XBJU
33. ଞͷݴޠͷඇಉظॲཧ
34. wඇಉظॲཧͷ࠷ऴతͳ׬ྃ΋͘͠͸ࣦഊΛ ද͢ΦϒδΣΫτ
    w݁ՌΛUIFOϝιουͳͲͰνΣΠϯͤ͞Δ 1SPNJTF
35. 1SPNJTF doSomething().then(function(result) { return doSomethingElse(result); }) .then(function(newResult) { return doThirdThing(newResult); }) .then(function(finalResult) { console.log('Got the final result: ' + finalResult); }) .catch(failureCallback);
36. wऴ͍ྃͯ͠Δ͔Ͳ͏͔Θ͔Βͳ͍ॲཧ݁Ռ Λந৅Խͨ͠ܕ
    w'VUVSF͸ະདྷͷ݁ՌΛද͢ܕ
    wจࣈ௨Γɺ૬खʢॲཧ͢Δଆʣʹʮະདྷʯ Λୗ͢ 'VUVSF
37. 'VUVSF val f: Future[List[String]] = Future { session.getRecentPosts } f onFailure { case t => println("Τϥʔ͕ൃੜͨ͠: " + t.getMessage) } f onSuccess { case posts => for (post <- posts) println(post) }
38. wඇಉظͰฦ͞ΕΔ஋Λड͚ΔͨΊͷߏจ "XBJU function resolveAfter2Seconds(x) { return new Promise(resolve => { setTimeout(() => { resolve(x); }, 2000); }); } async function f1() { var x = await resolveAfter2Seconds(10); console.log(x); // 10 } f1();
39. wඇಉظͰ஋Λฦ͢͜ͱΛ໌ࣔ͢Δߏจ "TZOD GVODUJPO
    SFTPMWF"GUFS4FDPOET
    \
    
    
    SFUVSO
    OFX
    1SPNJTF SFTPMWF
    
    \
    
    
    
    
    TFU5JNFPVU
    
    \
    
    
    
    
    
    
    SFTPMWF SFTPMWFE 
    
    
    
    
    ^
     
    
    
    ^ 
    ^
    BTZOD
    GVODUJPO
    BTZOD$BMM
    \
    
    
    DPOTPMFMPH DBMMJOH 
    
    
    WBS
    SFTVMU
    
    BXBJU
    SFTPMWF"GUFS4FDPOET 
    
    
    DPOTPMFMPH SFTVMU 
    
    
    
    FYQFDUFE
    PVUQVU
    SFTPMWFE
    ^
    BTZOD$BMM 
40. "TZOD function resolveAfter2Seconds(x) { return new Promise(resolve => { setTimeout(() => { resolve(x); }, 2000); }); } async function add1(x) { const a = await resolveAfter2Seconds(20); const b = await resolveAfter2Seconds(30); return x + a + b; } add1(10).then(v => { console.log(v); // 4ඵޙʹ60Λදࣔ͠·͢ɻ });
41. 4XJGUͰ
    ࣮ݱ͠Α͏ͱ͢Δͱ
42. "TZOD"XBJU
    GPS
    4XJGU "TZODͷߏจʹ͍ͭͯ
43. "TZOD"XBJU
    GPS
    4XJGU "XBJUͷߏจʹ͍ͭͯ
44. "TZOD"XBJU
    GPS
    4XJGU #FGPSF
45. "TZOD"XBJU
    GPS
    4XJGU "GUFS
46. ✌ Т✌
    ࡾ✌ Т ✌ࡾ
    ✌Т ✌
47. "TZOD"XBJU
    GPS
    4XJGU 'VUVSF
48. "TZOD"XBJU
    GPS
    4XJGU 'VUVSF
49. ͍͔ͭΒ࢖͑Δʁ
50. "TZOD"XBJU
    GPS
    4XJGU
52. IUUQTRJJUBDPNLPIFSJUFNTCFBFD
54. $PODVSSFODZ
    JO
    4XJGU
    0OF
    BQQSPBDI
55. $PODVSSFODZ
    JO
    4XJGU
    0OF
    BQQSPBDI
56. IUUQTXXXTMJEFTIBSFOFUZVHPMGQSFQBSJOHGPSEJTUSJCVUFETZTUFNGBJMVSFT VTJOHBLLBTDBMBNBUTVSJ
58. "QQFOEJY
59. w "TZOD"XBJU
    GPS
    4XJGU
    w $PODVSSFODZ
    JO
    4XJGU
    0OF
    BQQSPBDI
    w 1SPQPTBMʹ͸ࡌ͍ͬͯͳ͍4XJGU
    ͷBTZODBXBJU͕ૉ੖Β͠ ͍ͱࢥ͏ཧ࿦తഎܠ
    w "LLB
    JO
    "DUJPO
    XPSLTIPQ
    4DBMB.BUTVSJ
    
    w 1SFQBSJOH
    GPS
    EJTUSJCVUFE
    TZTUFN
    GBJMVSFT
    VTJOH
    BLLB
    4DBMB.BUTVSJ ࢀߟจݙ