Arraycollection duplicates

[PBFrO]

Hi everyone,

I'm getting an arraycollection back from a web service and trying to delete the duplicate but add a quantity value. I can check for duplicates just fine using a dictionary, but when I try to delete the previous item in the arraycollection using

resArray.removeItemAt(0);

I'm getting

"RangeError: Index '1' specified is out of bounds."

. Can anyone point me in the right direction? Thanks

[Barna Biro]

Hopefully, when you are removing items, then you are traversing the array from the back to the from and not how would normally traverse it. If you traverse it from the front to the back, then whenever you remove an item, the array gets update and the indexes change... so at one point, you will run into index values that no longer contain any elements because you have previously removed stuff.

[PBFrO]

Thanks for the reply. I'm just branching into Flex, been working with Flash for a long time and trying to get used to Flex. In regards to the response, my script is breaking on the call to remove the item, so I'm not sure if the index changing is happening like you mentioned. I just tried copying the array collection into an array and gave it a shot using

tArray.splice(i, 1);

and got the same range error. Here is the code I'm using, maybe it will help. Thanks

for(var i:int = 0; i < resArray.length; i++)
{
    if(resDictionary[resArray[i].Item])
    {
        trace("already there");
        _qty++;
        if(resArray[i].Item == resArray[0].Item && i > 0)
        {

        //tArray.splice(i, 1);  tried this and no luck either
        resArray.removeItemAt(0);
        }
          }
}

[Barna Biro]

It is exactly what I have explained above... instead of traversing the list from the front ( from index 0 ) you should traverse it backward ( starting from resArray.length and decrementing the value of "i", until you reach 0 ).

[PBFrO]

Ah ok, I see what you mean now. Thank you so much =)