jQuery push (array) not working

Question

I have a jquery as below:

$('.cl').click(function(){
var selected_locations;
var loc_id = $('.a').val();
alert(loc_id);
selected_locations.push(loc_id);
alert(selected_locations);
});

And the HTML :

<input type="text" name="a" class="a" value="1" />
<a href="#" class="cl">Click</a>

But when I click on the link , though it displays the value of loc_id, it does not alerts thereafter, ie the value of the array selected_locations . Whats wrong ? DEMO HERE

you can push anything in undefined variable ;)

A. Wolff
– A. Wolff

2013-12-18 09:43:44 +00:00
Commented Dec 18, 2013 at 9:43 — A. Wolff
– A. Wolff, Commented Dec 18, 2013 at 9:43

The Internet · Accepted Answer · 2013-12-18 09:40:48Z

7

You forgot to initialize it as a list. It is undefined by default;

var selected_locations = [];

answered Dec 18, 2013 at 9:40

The Internet

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Comments

Tushar Gupta - curioustushar · Accepted Answer · 2013-12-18 09:41:46Z

2

Initialize your array

var selected_locations = [];

and

alert(selected_locations.join());

fiddle Demo

answered Dec 18, 2013 at 9:41

Tushar Gupta - curioustushar

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Comments

Community · Accepted Answer · 2017-05-23 11:56:45Z

2

Declare a JavaScript array

var selected_locations = [];

or

var selected_locations = new Array();

edited May 23, 2017 at 11:56

CommunityBot

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answered Dec 18, 2013 at 9:43

Prateek

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