Add new value to an existing array in JavaScript [duplicate]

Answer 1

This has nothing to do with jQuery, just JavaScript in general.

To create an array in JavaScript:

var a = [];

Or:

var a = ['value1', 'value2', 'value3'];

To append values on the end of existing array:

a.push('value4');

To create a new array, you should really use [] instead of new Array() for the following reasons:

• new Array(1, 2) is equivalent to [1, 2], but new Array(1) is not equivalent to [1]. Rather the latter is closer to [undefined], since a single integer argument to the Array constructor indicates the desired array length.
• Array, just like any other built-in JavaScript class, is not a keyword. Therefore, someone could easily define Array in your code to do something other than construct an array.

Answer 2

You can use the .push() method (which is standard JavaScript)

e.g.

var primates = new Array();
primates.push('monkey');
primates.push('chimp');