Or if you aren't deleting everything, put i-- next to each pop().
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Jobe
Makar
Sent: Monday, 21 November 2005 10:46 AM
To: Flashcoders mailing list
Subject: Re: [Flashcoders] Array Madness - test yourself
Hi Judah,
This is a good candidate for a 'while' loop:
while(errors.length >0) {
errors.pop();
}
Jobe Makar
http://www.electrotank.com
http://www.electro-server.com
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----- Original Message -----
From: "Judah Frangipane" <[EMAIL PROTECTED]>
To: "Flashcoders mailing list" <flashcoders@chattyfig.figleaf.com>
Sent: Sunday, November 20, 2005 6:48 PM
Subject: [Flashcoders] Array Madness - test yourself
>I just want to bring to your attention a rare array problem that eluded
> me for years. I just realized what is going on.
>
> Whenever I tried to clear an array I would use a for loop, iterate
> through all the items and pop each one off. Every once in a while the
> arrays would still contain values and not be completely erased. Can
you
> spot the error? Here is the code:
>
> *****************************************
> wrong way
> *****************************************
> // create an array
> errors = new Array()
> // add two items
> errors.push("item 1")
> errors.push("item 2")
>
> // loop through each item
> for (var i=0;i < errors.length; i++) {
> trace("removing item")
> errors.pop()
> }
> // errors.length = 1
> trace("errors.length="+errors.length)
>
>
> *****************************************
> right way
> *****************************************
> // create an array
> errors = new Array()
> // add two items
> errors.push("item 1")
> errors.push("item 2")
> var len = errors.length;
>
> // loop through each item
> for (var i=0;i < len; i++) {
> trace("removing item")
> errors.pop()
> }
> // errors.length = 0
> trace("errors.length="+errors.length)
>
>
> Look at the condition (i < errors.length).
>
> If we pop an item off the end of the array then the length of the
array
> is decreased and we do not iterate through all items in the array.
Hope
> this helps someone.
>
> Best Regards,
> Judah
>
>
>
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>
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