JavaScript Массив entries()

❮ Назад JavaScript Array Справочник Далее ❯

Example

// Создаем массив
const fruits = ["Банан", "Апельсин", "Яблоко", "Манго"];

// Создаем итератор
const list = fruits.entries();

// Перечисляем записи
let text = "";
for (let x of list) {
text += x;
}

Try it Yourself »

More Examples Below!

Description

The entries() method returns an Iterator object with the key/value pairs from an array:

[0, "Банан"]
[1, "Апельсин"]
[2, "Яблоко"]
[3, "Манго"]

The entries() method does not change the original array.

Array Iteration Methods:

The Array entries() Method

The Array every() Method

The Array filter() Method

The Array forEach() Method

The Array keys() Method

The Array map() Method

Syntax

array.entries()

Parameters

NONE

Return Value

Type	Description
Iterable	An Iterable object with the key/value pairs from the array.

More Examples

Example

Iterate directly over the Iterator:

// Создаем массив
const fruits = ["Банан", "Апельсин", "Яблоко", "Манго"];

// Перечисляем записи
let text = "";
for (let x of fruits.entries()) {
text += x;
}

Try it Yourself »

Example

Use the built in Object.entries() method:

// Создаем массив
const fruits = ["Банан", "Апельсин", "Яблоко", "Манго"];

// Перечисляем ключи
let text = "";
for (let x of Object.entries(fruits)) {
text += x;
}

Try it Yourself »

Note

It is not a good practice to save an iterator.

The iterator has a next() method to access each element one at a time.

As soon as you start using it, it cannot be reset or restarted.

Example

Use the next() method of the iterator:

// Создаем массив
const fruits = ["Банан", "Апельсин", "Яблоко", "Манго"];

// Создаем итератор
const list = fruits.entries();

// Перечисляем записи
let text = list.next().value + " " + list.next().value;

Try it Yourself »