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PHPerから見た昨今のJSについて
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polidog
March 14, 2015
Technology
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PHPerから見た昨今のJSについて
polidog
March 14, 2015
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Transcript
PHPer͔ΒݟͨࡢࠓͷJSʹͭ ͍ͯ ੩ԬJavaScriptษڧձ #3 @polidog
ࣗݾհ • ϙϦυοάͰ͢ɻ݄ྋଠͬͯݴ͍·͢ɻ • ਗ਼ਫࢢੜ·Εɻਗ਼ਫ۠ҭͪɻ • PHPerͰ͢ɻJS࣌ʑॻ͖·͢ɻ • SymfonyϢʔβʔձͷਓʹͳΓ·ͨ͠ɻ •
λϰΟίϜגࣜձࣾͰΤϯδχΞͬͯ·͢ɻ
ࠓ͍ͨ͜͠ͱ
ͦͷલʹએ
λϰΟίϜͰɺgotripͱ͍ ͏ϝσΟΞͬͯ·͢ɻ http://gotrip.jp/
Symfony Meetup։࠵͠· ͢ʂ https://symfony.doorkeeper.jp/events/ 21692
ࠓ͍ͨ͜͠ͱ
ECMA Script6!!
– @nakajmg “ࠓ͔Β֮͑ΔͳΒCoffeeScriptΑΓES6 ͩΑɻ”
ͱ͜ΖͰESͬͯʁ
–ɹWikipediaΑΓ “Ecma InternationalʹΑͬͯඪ४Խ͞Ε ͨεΫϦϓτݴޠͰ͋Δɻ࣮͝ͱͷޓ ੑ͕͍ JavaScript ྨʢಛʹ JScriptʣ ͷඪ४ΛఆΊͨͷͰ͋Δɻ”
ES6ͰՃ͞ΕΔ
Features https://github.com/lukehoban/es6features
ࠓ͢ػೳ 1. ؔ(Arrow functions,Function Argumentss) 2. ม(let + const) 3.
Ϋϥε(classes) 4. δΣωϨʔλͱfor of 5. άϩʔόϧΦϒδΣΫτ(Map,Set, WeakMap, WeakSet) 6. Promises
1. ؔ var test = a => { console.log(“execute!! :
”+a); } function a(x, y=12) { } function b(x, ...y) { } function c(x,y,z) {} args = [1,2,3] c(…args);
1. ؔ(ArrowFunctions) =>ΛͬͯؔఆٛͰ͖Δ Ҿෳ (a,b) => ͱͳΔ ෳߦͷ߹{}Λ͏
1. ؔ(FunctionArguments) ؔύϥϝʔλʹʹσϑΥϧτ͕ઃఆͰ͖ Δɻ ՄมҾΛ…argsͰࢦఆͰ͖Δɻ ྻΛؔҾʹల։Ͱ͖Δɻ
2. ม let hoge = 1; const fuga = 2;
2. ม letΛ͏ͱϒϩοΫείʔϓ͕࣮ݱͰ͖Δɻ constΛ͏ͱ্ॻ͖Ͱ͖ͳ͍ɻ
3. Ϋϥε class Hoge { } var hoge = new
Hoge();
3. Ϋϥε ΫϥεએݴͰॻ͚Δɻ extendsͰܧঝͰ͖Δɻ superͰܧঝݩͷϝιουݺͼग़ͤΔɻ
4. δΣωϨʔλͱfor of let gen = function*() { for(let i
= 0; i < 10; i++) { yield i+10; } } for (let i of gen()) { console.log(i) }
4. δΣωϨʔλͱfor of function* ͱ yieldΛ͏ for of ͰϧʔϓͰ͖Δ ArrowFunctionͱΈ߹ΘͤΒΕͳ͍
5. άϩʔόϧΦϒδΣΫτ var set = new Set(); set.add(“hoge”).add(“fuga”) var map
= new Map(); map.set(“hoge”,10); map.set(“fuga”,20);
5. άϩʔόϧΦϒδΣΫτ Set Map WeakSet WeakMap ͕͑Δɻ
6. Promises function timeout(duration = 0) { return new Promise((resolve,
reject) => { setTimeout(resolve, duration); }) } var p = timeout(1000).then(() => { return timeout(2000); }).then(() => { throw new Error("hmm"); }).catch(err => { return Promise.all([timeout(100), timeout(200)]); })
6. Promises http://azu.github.io/promises-book/
Ͳ͏ͬͯಈ͔͢ͷʁ
ECMAScript 6 compatibility table http://kangax.github.io/compat-table/es6/
େ͖͚ͯ̎ͭ͘ • αʔόαΠυͰ࣮ߦ͢Δ • τϥϯείϯύΠϥΛར༻͢Δ
αʔόαΠυͰಈ͔ͯ͠ΈΑ ͏ɻ
IUUQTJPKTPSHKBJOEFYIUNM
͜Μͳײ͡Ͱ࣮ߦ͢Δ $ iojs --harmony_classes ./classes.es6.js $ iojs --harmony_arrow_functions ./arrows.js $
iojs --es_staging ./hoge.js
iojs͏ͱ͖ʹҙ
Φϓγϣϯ(flag)͕ඞཁ • shipping features → ϑϥάඞཁͳ͍ • staged features →
--es_staging͕ඞཁ • in progress features → ݸผʹϑϥάࢦఆ͕ඞ ཁ
ϑϥάΛௐΔ $ iojs --v8-options | grep harmony
ΊΜͲ͍͔͘͞Βશ෦ͷϑϥ άΛࢦఆͯ͠ΈΔɻ $ iojs $(iojs --v8-options | grep harmony |
sed -e 's/(.*)\(.* \)/ /g' | tr '\n' ' ‘) ./hoge.js
ৄ͍͠ࣄiojsͷαΠτͷ͜ ͜Λ֬ೝ͠·͠ΐ͏ɻ https://iojs.org/ja/es6.html
τϥϯείϯύΠϥ
IUUQTCBCFMKTJP
gulpͱΈ߹ΘͤͯΈ·͠ΐ ͏ɻ
“Ұ൪ॏཁͳͷָ͘͠ॻ͚Δ͔Ͳ͏͔ͬ ͯ͜ͱɻ”