Array.prototype[@@iterator]()

概要

@@iteratorプロパティの初期値はvalues()プロパティの初期値と同じ関数オブジェクトです。

構文

arr[Symbol.iterator]()

例

例: for...ofループを用いた反復

var arr = ['w', 'y', 'k', 'o', 'p'];
// your browser must support for..of loop
// and let-scoped variables in for loops
for (let letter of arr) {
  console.log(letter);
}

例: 代りの反復

var arr = ['w', 'y', 'k', 'o', 'p'];
var eArr = arr[Symbol.iterator]();
console.log(eArr.next().value); // w
console.log(eArr.next().value); // y
console.log(eArr.next().value); // k
console.log(eArr.next().value); // o
console.log(eArr.next().value); // p

仕様

ブラウザ実装状況

Gecko特有の覚書

• From Gecko 17 (Firefox 17 / Thunderbird 17 / SeaMonkey 2.14) to Gecko 26 (Firefox 26 / Thunderbird 26 / SeaMonkey 2.23 / Firefox OS 1.2) the iterator property was used (バグ 907077), and from Gecko 27 to Gecko 35 the "@@iterator" placeholder was used instead of the @@iterator symbol (バグ 918828).

関連情報

• Array.prototype.keys()
• Array.prototype.entries()
• Array.prototype.forEach()
• Array.prototype.every()
• Array.prototype.some()
• Array.prototype.values()