[Greasemonkey] Re: in array

[Andre]

interesting reading ... so what am I actually doing when I use this:

	var x = {'string1':'stringx', 'sting2':'stringy'};
	x['string3'] = 'stringz';

Sorry, for the stupid question ...
Andre

Aaron Boodman wrote:
> Is it possible that you are using
> 
> for (var i in arr) {
> 
> }
> 
> ? This is a brittle construction when arr is an array (as opposed to
> an object) and should be avoided. See
> http://ajaxian.com/archives/javascript-associative-arrays-considered-harmful 
> 
> 
> - a
> 
> On 6/13/06, Nikolas Coukouma <atrus at atrus.org> wrote:
>> Chris Hayes wrote:
>> > For some reason a script that worked for a long time now says
>> >
>> >  Error: msgdata.content[msg_nr] has no properties
>>
>> It seems weird that it's now an error, but I can't guess why without
>> more code.
>>
>> > Is there a way to do a check to see whether msgdata['content'][msg_nr]
>> > exists / has properties, without causing an error?
>> >
>> > Maybe like the PHP function isset() or in_array() ?
>> If something doesn't exist, it's value is undefined which is considered
>> false in boolean expressions. So, you can use it in an if statement:
>> if(msgdata['content'][msg_nr]) {
>>   // do stuff
>> }
>>
>> Cheers,
>> -Nikolas
>>
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