How to add a new value to the end of an numerical array?

Question

In PHP I can do like:

$arrayname[] = 'value';

Then the value will be put in the last numerical key eg. 4 if the 3 keys already exists.

In JavaScript I can’t do the same with:

arrayname[] = 'value';

How do you do it in JavaScript?

score 12 · Accepted Answer · answered Dec 25 '09 at 16:56

12

You can use the push method.

For instance (using Firebug to test quickly) :

First, declare an array that contains a couple of items :

>>> var a = [10, 20, 30, 'glop'];

The array contains :

>>> a
[10, 20, 30, "glop"]

And now, push a new value to its end :

>>> a.push('test');
5

The array now contains :

>>> a
[10, 20, 30, "glop", "test"]

answered Dec 25 '09 at 16:56

Pascal MARTIN

To add multiple elements at the same time or to add an element somewhere other than the end check out the answer: http://stackoverflow.com/a/12189963/984780 – Luis Perez Aug 30 '12 at 04:52
Just to help other rookies who come along, do NOT try `a = a.push('test');` for 10 mins. :) – Joshua Dance May 14 '14 at 16:51

score 11 · Answer 2 · answered Dec 25 '09 at 16:59

11

You can use

arrayName.push('yourValue');

OR

arrayName[arrayName.length] = 'yourvalue';

Thanks

answered Dec 25 '09 at 16:59

Mahesh Velaga

score 7 · Answer 3 · answered Dec 25 '09 at 16:54

7

You can use array push method

arrayname.push('value');

answered Dec 25 '09 at 16:54

Chandra Patni

3 Answers3