Array.prototype.entries()
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since julio de 2015.
El método entries() retorna un nuevo objeto Array Iterator que contiene los pares clave/valor para cada índice de la matriz.
Pruébalo
const array1 = ["a", "b", "c"];
const iterator1 = array1.entries();
console.log(iterator1.next().value);
// Expected output: Array [0, "a"]
console.log(iterator1.next().value);
// Expected output: Array [1, "b"]
Sintaxis
arr.entries()
Valor de retorno
Un nuevo objeto iterador Array.
Ejemplos
Usando un bucle for…of
js
var a = ["a", "b", "c"];
var iterator = a.entries();
for (let e of iterator) {
console.log(e);
}
// [0, 'a']
// [1, 'b']
// [2, 'c']
Especificaciones
| Specification |
|---|
| ECMAScript® 2027 Language Specification # sec-array.prototype.entries |