Question

160

How to access a numeric property?

rated 0 times [ 164] [ 4] / answers: 1 / hits: 19969 / 15 Years ago, fri, january 8, 2010, 12:00:00

I have an object like:

var myObject = { '0' : 'blue' };

Now, when I try to access the value of the key '0' like:

myObject.0

...I am getting an error. (Maybe this is not the proper way?)

How can I access the value of a key that is a number (like the above)?

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parker

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4 Years ago

answered 15 Years ago leslijessalyng · Accepted Answer

This should work:

myObject[0]

(myObject[propertyName] is an alternative syntax for myObject.propertyName.)

You're getting the error because, in JavaScript, identifiers can't begin with a numeral. From the Variables page at the Mozilla Developer Centre:

A JavaScript identifier must start
with a letter, underscore (_), or
dollar sign ($); subsequent characters
can also be digits (0-9). Because
JavaScript is case sensitive, letters
include the characters A through Z
(uppercase) and the characters a
through z (lowercase).