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From: Dr J R Stockton on 25 Feb 2010 15:36
In comp.lang.javascript message <tytbxo8f.fsf(a)gmail.com>, Sun, 21 Feb
2010 04:27:12, Lasse Reichstein Nielsen <lrn.unread(a)gmail.com> posted:
>laredotornado <laredotornado(a)zipmail.com> writes:
>
>> Given an associative array, how do I get an array of the keys of that
>> associative array?
>
>If arr is your associative array (i.e., an object)
>In ECMAScript 5:
> var keys = Object.keys(object)
>In ECMAScript 3:
> var keys = [];
> for (var key in arr) { keys.push(key); }

The second entry should I suppose be headed "In ECMAScript 3 & 5"; and
will then be the way to code it (for the open Web) until all browsers in
use are sufficiently ES 5 compliant.

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