delete methods added to array prototype ?

[gerry]

I have to do some work with a 3rd party javascipt library that adds methods
to the Array prototype.
Of course this messes up anything that does a for...in expecting to only get
items contained within the array as it now returns the additional method
names as well.

I came up with this little routine that works perfectly in IE but does
nothing in any other browser :
function cleanArray( arr )
{
if ( !( arr && arr instanceof Array ) )
arr = new Array();
for( var key in arr )
{
if ( typeof(arr[key]) == 'function' )
delete arr[key];
}
return arr;
}

So it looks like MS is implementing delete in a useful but not standard way.
Is there any other way to get/create a 'clean' array without the extra
methods that have been added to the Array prototype ?

Gerry

[Martin Honnen]

gerry wrote:
> I have to do some work with a 3rd party javascipt library that adds methods
> to the Array prototype.
> Of course this messes up anything that does a for...in expecting to only get
> items contained within the array as it now returns the additional method
> names as well.

Use a classic for loop to access the array items:
for (var i = 0, l = a.length; i < l; i++)
{
var item = a[i];
}

As for the for..in loop, you can at least check
for (var p in a)
{
if (a.hasOwnProperty(p))
{
...
}
}

--

Martin Honnen --- MVP XML
http://JavaScript.FAQTs.com/

[Allen Chen [MSFT]]

Hi Gerry,

I think Martin's answer is correct. If you have additional questions please
feel free to ask. I'll do my best to follow up.

Regards,
Allen Chen
Microsoft Online Support

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[Allen Chen [MSFT]]

Hi Gerry,

Have you solved this issue?

[gerry]

essentially we replaced the 3rd party lib with in an in-house lib that
doesn't modify the array prototype.

"Allen Chen [MSFT]" <v-al...@online.microsoft.com> wrote in message
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