Comments on: Removing duplicate items from an array using the Array.filter() method

By: HQ

HQ — Thu, 29 Sep 2011 07:18:58 +0000

Very nice example! Thank you very much!

By: Wagner

Wagner — Fri, 05 Aug 2011 20:13:27 +0000

if I have 2 datagrids using the same array bindable. and I want the filter to be applied to only one of the datagrids. how?

By: Chinmaya

Chinmaya — Sat, 02 Jul 2011 09:15:24 +0000

Nice example !!! Thanks !!!

@Priya: Use .refresh();

By: priya

priya — Mon, 02 Aug 2010 11:58:55 +0000

when I use above filter function for ArrayCollection along with Datagrid, upon click of sort functionality, datagrid is becoming empty.
how to resolve this issue?

By: Aviral Sharma

Aviral Sharma — Fri, 22 Jan 2010 00:11:06 +0000

If you wanna use the filter function twice, you might wanna clear the keys object since it already has old values for second use.

Snippet:

keys={};
var filterRoutes:Array = routesArray.filter(removedDuplicates);
keys={};
var filterDivisions:Array = divisionsArray.filter(removedDuplicates);

By: ixdl

ixdl — Thu, 14 Jan 2010 01:27:46 +0000

Bob,
let’s say you have an ArrayCollection AC with Strings S.
To make sure that each String is represented only once:

S=”Bob”;
if ( !AC.contains(S)) AC.addItem(S);

By: Yuri

Yuri — Fri, 07 Aug 2009 13:08:33 +0000

Thanks, man! That’s what I needed here. Awesome!

By: peterd

peterd — Mon, 06 Aug 2007 18:05:34 +0000

Bob, I believe it can. Try something like this:

dedupedArrColl = new ArrayCollection(arr);
dedupedArrColl.filterFunction = removedDuplicates;
dedupedArrColl.refresh();

And then change the filtering function to this:

/** Note that the method has 1 parameter now instead of 3, the rest of the code can remain the same */
private function removedDuplicates(item:Object):Boolean {
   // ...
}

By: Bob

Bob — Mon, 06 Aug 2007 17:37:23 +0000

Nice example! Can this be done with an ArrayCollection as well?

By: FlexLover

FlexLover — Sun, 05 Aug 2007 21:35:34 +0000

Tank’you very much, this is the right example for me.