javascript associative array initialization error? - Stack Overflow

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<script>
var tids = {
308: 1,
312: 1,
313: 1,
314: 1
};
</script>

results in "missing } in XML expression with an arrow pointing to the first colon in the JS error console. Isn't this a valid declaration?

<script>
var tids = {
308: 1,
312: 1,
313: 1,
314: 1
};
</script>

results in "missing } in XML expression with an arrow pointing to the first colon in the JS error console. Isn't this a valid declaration?

• javascript

Share Improve this question Follow asked Jan 11, 2010 at 18:03 user105033user105033 19.6k2020 gold badges5959 silver badges7070 bronze badges 2

• 1 Do you have any other JS code or is this it? This by itself on a page works just fine without any errors. – Marek Karbarz Commented Jan 11, 2010 at 18:06
• Have you tried declaring your script tag's type: <script type='text/javascript' language='javascript'>? Might help if your browser is confused for some reason... – Topher Fangio Commented Jan 11, 2010 at 18:10

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4 Answers 4

Sorted by: Reset to default 8

First you should fix your <script> tag to

<script type="text/javascript">

Next, if you want to use numeric indexes, try to declare them as a string:

var tids = {
'308': 1,
'312': 1,
'313': 1,
'314': 1
};

Please note, however, that you will not be able to reference them in object notation (i.e. tids.308). You could simply use arrays instead of objects:

This isn't an associative array -- it's just a JS object. I believe you need to make the keys strings instead of numeric.

var tids = {
"308": 1,
"312": 1,
"313": 1,
"314": 1
};

More info on associative arrays vs. regular objects.

i guess that the key cannot start with a number. try;

<script>
var tids = {
n308: 1,
n312: 1,
n313: 1,
n314: 1
};
</script>

I have tried in both IE and FF and the code is fine. It should be the error of other codes.

Please use Firefox Web Developer and Firebug to find the source of error.

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