What's wrong with my JavaScript syntax?

Question

I'm writing a javascript slideshow, but Firebug is telling me there's an error in the syntax, or something, but I just can't see what's wrong! Here's the code snippet:

<script language="javascript" type="text/javascript">

var data = new Array();

var data[0] = new Array();
var data[0]['id'] = 'example';
var data[0]['height'] = 190;

</script>

Firebug says:

missing ; before statement  

var data[0] = new Array();

The problem? Well, I just don't understand where the problem is! Could anyone explain the mistake to me? Thank you!

leppie · Accepted Answer · 2012-01-29 17:41:21Z

5

You can't declare an array index. Lose the var on all but the first line.

answered Jan 29, 2012 at 17:41

leppie

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3 Comments

Dennis Over a year ago

Right answer, and additionally you should not declare an array via new Array();, but via [], because that is considered best practise. so the first line should say var data = [];

zellio Over a year ago

It also looks like he wants {} instead of new Array for the second line

Sean Bone Over a year ago

Thank you for the quick answers! That fixed the problem. Also thank you for the 'best practice' tips!

MauroPorras · Accepted Answer · 2012-01-29 17:46:00Z

1

Keep only the first "var" statement, it will work like this:

var data = [];

data[0] = [];
data[0]['id'] = 'example';
data[0]['height'] = 190;

Take a look http://jsfiddle.net/cmTBc/

answered Jan 29, 2012 at 17:46

MauroPorras

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