entries()
方法會回傳一個包含陣列中每一個索引之鍵值對(key/value pairs)的新陣列迭代器(Array Iterator
)物件。
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語法
a.entries()
回傳值
一個新的 Array
迭代器物件。
範例
使用 for…of 進行迭代
var a = ['a', 'b', 'c'];
var iterator = a.entries();
for (let e of iterator) {
console.log(e);
}
// [0, 'a']
// [1, 'b']
// [2, 'c']
規範
瀏覽器相容性
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