SwiftのAsync / Awaitについて

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SwiftͷAsync / Await ʹ͍ͭͯ ౔ ୈ1ճ HAKATA.swift

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"CPVUNF

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wΫϥεϝιουגࣜձࣾ wϞόΠϧΞϓϦαʔϏε෦ wJ04ΞϓϦΤϯδχΞ wαʔόʔαΠυΞϓϦΤϯδχΞ wαʔόʔϨε։ൃ෦ wΞϓϦέʔγϣϯΤϯδχΞ ాத޹໌ @kongmingtrap

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wΫϥεϝιουגࣜձࣾ wϞόΠϧΞϓϦαʔϏε෦ wJ04ΞϓϦΤϯδχΞ wαʔόʔαΠυΞϓϦΤϯδχΞ wαʔόʔϨε։ൃ෦ wΞϓϦέʔγϣϯΤϯδχΞ ాத޹໌ @kongmingtrap

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wΫϥεϝιουגࣜձࣾ wϞόΠϧΞϓϦαʔϏε෦ wJ04ΞϓϦΤϯδχΞ wαʔόʔαΠυΞϓϦΤϯδχΞ wαʔόʔϨε։ൃ෦ wΞϓϦέʔγϣϯΤϯδχΞ ాத޹໌ @kongmingtrap :".-͸༑ୡʂʂ

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Ϟνϕʔγϣϯ

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ձࣾͷۚͰߦ͘ ւ֎ΧϯϑΝϨϯε͸ ࠷ߴͩͥʜ

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4XJGUͷ "TZOD"XBJUʹ͍ͭͯ

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Ϟνϕʔγϣϯ

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IUUQTBXTBNB[PODPNKQBCPVUBXTXIBUTOFXBXTMBNCEB TVQQPSUTOPEFKT

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IUUQTBXTBNB[PODPNKQBCPVUBXTXIBUTOFXBXTMBNCEB TVQQPSUTOPEFKT

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ͳΔ΄Ͳ

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4XJGU͸ Ͳ͏ͳ͍ͬͯΔΜͩΖ͏ʁ

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"TZOD"XBJUGPS4XJGU

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"TZOD"XBJUGPS4XJGU

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എܠ

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ඇಉظॲཧʹ·ͭΘΔ ՝୊ͷ਺ʑ

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"TZOD"XBJUGPS4XJGU ໰୊఺

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"TZOD"XBJUGPS4XJGU ໰୊఺ ඇಉظॲཧΛͭͳ͛ཧ৔߹ ͷίʔϧόοΫ஍ࠈ

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"TZOD"XBJUGPS4XJGU

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"TZOD"XBJUGPS4XJGU ΤϥʔϋϯυϦϯ άͰͷίʔϧόο Ϋ஍ࠈ

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"TZOD"XBJUGPS4XJGU ໰୊఺

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"TZOD"XBJUGPS4XJGU ໰୊఺ ৚݅෇͖Ͱඇಉظॲཧ Λ࣮ࢪ͍ͨ͠৔߹ɺେ ఍ͷ৔߹ɺίʔυ಺ʹ ΫϩʔδϟΛॻ͘͜ͱ ʹͳΔ

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"TZOD"XBJUGPS4XJGU

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"TZOD"XBJUGPS4XJGU ޙͷॲཧͰHVBSEͳͲͰ ฦΔ஋ͷߟྀΛ๨Εͯ͠ ·͏ ͦ΋ͦ΋σόοά͠ਏ͍

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"TZOD"XBJUGPS4XJGU ໰୊఺

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"TZOD"XBJUGPS4XJGU ໰୊఺ ʢϥτφʔࢯͷܦݧଇͱલஔ͖ͭͭ͠ʜʣ ඇಉظ"1*Λ࡞ͬͯ΋ɺଟ͘ͷ৔߹͸6*ͷߋ৽ͳͲ ͕བྷΉͨΊɺಉظಈ࡞Ͱߦ͏͜ͱ͕ଟ͍

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"TZOD"XBJUGPS4XJGU

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"TZOD"XBJUGPS4XJGU ࠶։ՄೳͳॲཧΛඳ͖͍ͨ࣌ɺ4XJGUͷ৔߹ͩͱɺ ஈ֊తʹ஋Λੜ੒͢Δ΋ͷΛͱͯ͠ఆٛ͢Δඞཁ͕ ͋Δ

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"TZOD"XBJU

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wඇಉظॲཧͷߏจ w1SPNJTFΛ؆ܿʹهड़Ͱ͖ΔΑ͏ʹͨ͠ w༷ʑͳݴޠʹΤοηϯε͕औΓࠐ·Ε͍ͯ Δʢ+BWB4DSJQUɺ$ɺ1ZUIPOɺ3VTUʜʣ "TZOD"XBJU

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ଞͷݴޠͷඇಉظॲཧ

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wඇಉظॲཧͷ࠷ऴతͳ׬ྃ΋͘͠͸ࣦഊΛ ද͢ΦϒδΣΫτ w݁ՌΛUIFOϝιουͳͲͰνΣΠϯͤ͞Δ 1SPNJTF

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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);

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wऴ͍ྃͯ͠Δ͔Ͳ͏͔Θ͔Βͳ͍ॲཧ݁Ռ Λந৅Խͨ͠ܕ w'VUVSF͸ະདྷͷ݁ՌΛද͢ܕ wจࣈ௨Γɺ૬खʢॲཧ͢Δଆʣʹʮະདྷʯ Λୗ͢ 'VUVSF

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'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) }

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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();

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wඇಉظͰ஋Λฦ͢͜ͱΛ໌ࣔ͢Δߏจ "TZOD GVODUJPOSFTPMWF"GUFS4FDPOET \ SFUVSOOFX1SPNJTF SFTPMWF\ TFU5JNFPVU \ SFTPMWF SFTPMWFE ^ ^ ^ BTZODGVODUJPOBTZOD$BMM \ DPOTPMFMPH DBMMJOH WBSSFTVMUBXBJUSFTPMWF"GUFS4FDPOET DPOTPMFMPH SFTVMU FYQFDUFEPVUQVUSFTPMWFE ^ BTZOD$BMM

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"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 });

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4XJGUͰ ࣮ݱ͠Α͏ͱ͢Δͱ

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"TZOD"XBJUGPS4XJGU "TZODͷߏจʹ͍ͭͯ

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"TZOD"XBJUGPS4XJGU "XBJUͷߏจʹ͍ͭͯ

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"TZOD"XBJUGPS4XJGU #FGPSF

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"TZOD"XBJUGPS4XJGU "GUFS

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✌ Т✌ ࡾ✌ Т ✌ࡾ ✌Т ✌

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"TZOD"XBJUGPS4XJGU 'VUVSF

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"TZOD"XBJUGPS4XJGU 'VUVSF

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͍͔ͭΒ࢖͑Δʁ

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"TZOD"XBJUGPS4XJGU

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IUUQTRJJUBDPNLPIFSJUFNTCFBFD

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$PODVSSFODZJO 4XJGU0OFBQQSPBDI

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$PODVSSFODZJO4XJGU0OFBQQSPBDI

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IUUQTXXXTMJEFTIBSFOFUZVHPMGQSFQBSJOHGPSEJTUSJCVUFETZTUFNGBJMVSFT VTJOHBLLBTDBMBNBUTVSJ

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"QQFOEJY

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w "TZOD"XBJUGPS4XJGU w $PODVSSFODZJO4XJGU0OFBQQSPBDI w 1SPQPTBMʹ͸ࡌ͍ͬͯͳ͍4XJGUͷBTZODBXBJU͕ૉ੖Β͠ ͍ͱࢥ͏ཧ࿦తഎܠ w "LLBJO"DUJPOXPSLTIPQ4DBMB.BUTVSJ w 1SFQBSJOHGPSEJTUSJCVUFETZTUFNGBJMVSFTVTJOHBLLB 4DBMB.BUTVSJ ࢀߟจݙ

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