Promises
Introduction One of the most exciting features introduced in ES6 is generators. Their primary use case is in representing lazy (possibly infinite) sequences. For example, the following function returns the first n positive integers. function count(n){ var res = [] for (var x = 0; x < n; x++) { res.push(x) } return res } for (var x of count(5)) { console.log(x) } We can write a very similar functio
Promises
Motivation Consider the following synchronous JavaScript function to read a file and parse it as JSON. It is simple and easy to read, but you wouldn't want to use it in most applications as it is blocking. This means that while you are reading the file from disk (a slow operation) nothing else can happen. function readJSONSync(filename) { return JSON.parse(fs.readFileSync(filename, 'utf8')); } To
1
リリース、障害情報などのサービスのお知らせ
最新の人気エントリーの配信
処理を実行中です
j次のブックマーク
k前のブックマーク
lあとで読む
eコメント一覧を開く
oページを開く
Promises
