String.prototype[@@iterator]()
[@@iterator]()
方法返回一个新的Iterator对象,它遍历字符串的代码点,返回每一个代码点的字符串值。
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语法
string[Symbol.iterator]
返回值
一个新的Iterator对象。
示例
使用[@@iterator]()
var string = 'A\uD835\uDC68'; var strIter = string[Symbol.iterator](); console.log(strIter.next().value); // "A" console.log(strIter.next().value); // "\uD835\uDC68"
通过
for..of 使用[@@iterator]()
var string = 'A\uD835\uDC68B\uD835\uDC69C\uD835\uDC6A'; for (var v of string) { console.log(v); } // "A" // "\uD835\uDC68" // "B" // "\uD835\uDC69" // "C" // "\uD835\uDC6A"