What are the methods of array assignment in JavaScript

This article mainly introduces "what are the methods of array assignment in JavaScript". In daily operation, I believe that many people have doubts about the method of array assignment in JavaScript. Xiaobian consulted all kinds of data and sorted out simple and easy-to-use operation methods. I hope it will be helpful for you to answer the doubts about "what are the methods of array assignment in JavaScript?" Next, please follow the editor to study!

There are three ways of array assignment: 1, after creating the array, use the form of "array name [subscript] = value;" to assign values one by one; 2, use the "var array name = new Array (values list)" statement to assign values while creating the array; 3, use the "var array name = [value list];" statement to assign values while creating the array.

The operating environment of this tutorial: windows7 system, javascript1.8.5 version, Dell G3 computer.

The assignment method of JavaScript array

Method 1:

Create an empty array first:

Var arr = new Array (); / / empty array var arr = new Array (2); / / when giving a parameter to the Array () function, you can specify the length of the array (you can not specify it. The length of the array of js will change as the element is added) var arr = []; / / empty array

Assign values to an empty array

Arr [0] = 1 * arr [1] = 2

Method 2:

Simultaneous assignment of an array

Var arr = new Array (2pm 3)

Method 3:

Simultaneous assignment of an array

Var arr = [3pr 4]; / / enter an array directly, also called literal array

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