How to define array in js

To define a JavaScript array, you can use the following methods: Square brackets ([]) enclose element array literal syntax [1, 2, 3] new Array(3) constructor Array.of() method from Existing array creation spread operator (...)

How to define an array in JavaScript

Direct definition

The most direct way is to use square brackets ([]) to enclose elements:

<code class="js">const myArray = ['apple', 'banana', 'orange'];</code>

Array literal

You can also use a more concise array literal syntax:

<code class="js">const myArray = [1, 2, 3];</code>

Keywordnew Definition

You can also usenew keywords and Array constructors to define arrays:

<code class="js">const myArray = new Array(3); // 创建一个包含 3 个 undefined 元素的数组</code>

Other methods

There are some other methods that can be defined Arrays, but they are less commonly used:

• Array.of() Method: Creates a new array containing the specified elements.
• Create from existing array: A new array can be created from an existing array by copying or using the slice() method.
• Expand operator: Expand an iterable object (such as an array or collection) into an array by using the spread operator (...).

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