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February 26, 2017 00:52
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import React, { Component } from 'react' | |
import ReactDOM from 'react-dom' | |
import 'babel-polyfill'; | |
import co from 'co' | |
class Greet extends Component { | |
render() { | |
//1 ジェネレータ、ジェネレータ関数、ジェネレータを返す関数をresolveするPromiseを返します。 | |
co(function* () { | |
return yield Promise.resolve(true); | |
}).then(function (val) { | |
console.log(val); | |
}, function (err) { | |
console.error(err.stack); | |
}); | |
//2 渡した数だけ1秒ごとに数える | |
function sleep(i){ | |
return new Promise(function(resolve){ | |
setTimeout(resolve,1000); | |
}) | |
}; | |
var num = co.wrap(function* (num){ | |
for(var i = 1; i <= num; i++) { | |
yield sleep(i); | |
console.log(i) | |
} | |
yield sleep(1) | |
}) | |
num(5).then(function(num){ | |
console.log("done") | |
}); | |
//3 | |
// var fn = co.wrap(fn*) | |
//generatorをPromiseを返す関数にする | |
var fn = co.wrap(function* (val) { | |
return yield Promise.resolve(val); | |
}); | |
fn("fafa").then(function (val) { | |
console.log(val); | |
}); | |
//4 | |
// co(function *(){ | |
// // yield any promise | |
// var result = yield Promise.resolve(true); | |
// console.log(result); | |
// }).catch(onerror); | |
// | |
// var fn = co.wrap(function* (fa){ | |
// return yield Promise.resolve(fa); | |
// }); | |
// fn(true).then(function(val){console.log(val)}) | |
//5 | |
// coを使わない場合の1秒ごとに出力する | |
// var i = 0; | |
// var timer = function() { | |
// console.log(i); | |
// i++; | |
// | |
// if (i < 5) { | |
// setTimeout(timer, 1000); | |
// } | |
// }; | |
// timer(); | |
//5 coを使う //forが使えるようになる | |
// const sleep = (ms) => { | |
// return new Promise((resolve) => { | |
// setTimeout(resolve, ms); | |
// }); | |
// }; | |
// co(function*() { | |
// for(let i = 0; i < 5; i++){ | |
// console.log(i); | |
// yield sleep(1000);//Promiseの処理が解決されるまで待機 | |
// } | |
// }); | |
//6 | |
// const timer2 = (str, ms) => { | |
// return new Promise((resolve) => { | |
// console.log(str); | |
// setTimeout(()=> { | |
// resolve(); | |
// }, ms); | |
// }); | |
// }; | |
// | |
// co(function* (){ | |
// yield timer2('fa', 1000); | |
// yield timer2('fafafa', 1000); | |
// yield timer2('nununu', 1000); | |
// yield [timer2('3', 1000), timer2('4', 1000), timer2('5', 1000)] | |
// yield timer2('6', 1000); | |
// }) | |
//7 | |
// const promiseFun = co.wrap( function* (url){ | |
// var fafa = yeild new Promise(function(resolve, reject){ | |
// var req = new XMLHttpRequest(); | |
// req.open('GET', url, true); | |
// req.onload = function(){ | |
// if(req.status == 200){ | |
// resolve(req.response); | |
// } else { | |
// reject(Error("error")); | |
// } | |
// } | |
// req.onerror = function(){ | |
// console.log("error"); | |
// } | |
// req.send(null); | |
// }); | |
// return fafa; | |
// }) | |
// promiseFun('http://localhost:3000/comments').then((res)=> console.log(res)) | |
return ( | |
<ul id='result'></ul> | |
) | |
} | |
} | |
window.addEventListener('DOMContentLoaded', ()=>{ | |
ReactDOM.render(<Greet />, document.querySelector('main')); | |
}) | |
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