Comments on: Where is IList.addAll() in AS3/Flex? http://www.techper.net/2008/05/26/where-is-ilistaddall-in-as3flex/ About Technology in My Life Mon, 01 Dec 2008 17:18:40 +0000 http://wordpress.org/?v=2.6 By: Danny Gold http://www.techper.net/2008/05/26/where-is-ilistaddall-in-as3flex/#comment-908 Danny Gold Sat, 31 May 2008 18:03:58 +0000 http://www.techper.net/2008/05/26/where-is-ilistaddall-in-as3flex/#comment-908 Roland's method is the best way to achieve the "addAll" functionality using the current collections API. calling addItem() in a loop will result in firing any Bindings each iteration through the loop which could be a huge performance hit. By setting the source property of the AC and using concat, you're modifying the underlying Array and the Bindings will only fire once you call collection.refresh(); Roland’s method is the best way to achieve the “addAll” functionality using the current collections API. calling addItem() in a loop will result in firing any Bindings each iteration through the loop which could be a huge performance hit. By setting the source property of the AC and using concat, you’re modifying the underlying Array and the Bindings will only fire once you call collection.refresh();

]]> By: polesen http://www.techper.net/2008/05/26/where-is-ilistaddall-in-as3flex/#comment-874 polesen Tue, 27 May 2008 19:32:22 +0000 http://www.techper.net/2008/05/26/where-is-ilistaddall-in-as3flex/#comment-874 @Roland Zwaga: Works too, thanks. @Roland Zwaga: Works too, thanks.

]]> By: Theo http://www.techper.net/2008/05/26/where-is-ilistaddall-in-as3flex/#comment-869 Theo Tue, 27 May 2008 16:30:48 +0000 http://www.techper.net/2008/05/26/where-is-ilistaddall-in-as3flex/#comment-869 Yeah, Set's are important, that's why I mentioned them twice, oh wait, three times now. Yeah, Set’s are important, that’s why I mentioned them twice, oh wait, three times now.

]]> By: Theo http://www.techper.net/2008/05/26/where-is-ilistaddall-in-as3flex/#comment-868 Theo Tue, 27 May 2008 16:29:36 +0000 http://www.techper.net/2008/05/26/where-is-ilistaddall-in-as3flex/#comment-868 I'd vote for anything that brought us a proper collections API, because mx.collections sure ain't one. I'd like a nice Set implementation, as well as a more thought-through API. In the Java collection API you can actually program to the interface types, but in Flex you have to type everything as ArrayCollection to be able to do any useful work without casting from IList to ICollectionView and back again. And how come IList is mutable, but ICollectionView is not? And why is there no Set implementation? I’d vote for anything that brought us a proper collections API, because mx.collections sure ain’t one.

I’d like a nice Set implementation, as well as a more thought-through API. In the Java collection API you can actually program to the interface types, but in Flex you have to type everything as ArrayCollection to be able to do any useful work without casting from IList to ICollectionView and back again. And how come IList is mutable, but ICollectionView is not? And why is there no Set implementation?

]]> By: Roland Zwaga http://www.techper.net/2008/05/26/where-is-ilistaddall-in-as3flex/#comment-867 Roland Zwaga Tue, 27 May 2008 15:44:47 +0000 http://www.techper.net/2008/05/26/where-is-ilistaddall-in-as3flex/#comment-867 How about this then? var collection:ArrayCollection = new ArrayCollection([1,2,3,4,5]); var toAdd:ArrayCollection = new ArrayCollection([6,7,8,9,10]); collection.source = collection.source.concat(toAdd.source); How about this then?

var collection:ArrayCollection = new ArrayCollection([1,2,3,4,5]);
var toAdd:ArrayCollection = new ArrayCollection([6,7,8,9,10]);
collection.source = collection.source.concat(toAdd.source);

]]> By: polesen http://www.techper.net/2008/05/26/where-is-ilistaddall-in-as3flex/#comment-865 polesen Tue, 27 May 2008 12:00:59 +0000 http://www.techper.net/2008/05/26/where-is-ilistaddall-in-as3flex/#comment-865 Oops, lordy, that didn't work. When doing the splice, the last argument (ArrB) is added as one element of type array. Taking the length of the array afterwards shows this, even though tracing it shows something else. I ended up with this: <code> var sourceArray:Array = collection.source; toAdd.forEach(function(element:*, index:int, arr:Array) : void { sourceArray.push(element); }); collection.refresh(); </code> About the events. I added myself as a CollectionEvent.COLLECTION_CHANGE listener, and I only got event on the refresh. Oops, lordy, that didn’t work. When doing the splice, the last argument (ArrB) is added as one element of type array. Taking the length of the array afterwards shows this, even though tracing it shows something else.

I ended up with this:


var sourceArray:Array = collection.source;
toAdd.forEach(function(element:*, index:int, arr:Array) : void {
sourceArray.push(element);
});
collection.refresh();

About the events. I added myself as a CollectionEvent.COLLECTION_CHANGE listener, and I only got event on the refresh.

]]> By: polesen http://www.techper.net/2008/05/26/where-is-ilistaddall-in-as3flex/#comment-864 polesen Tue, 27 May 2008 05:31:43 +0000 http://www.techper.net/2008/05/26/where-is-ilistaddall-in-as3flex/#comment-864 Thanks lordy. Thanks lordy.

]]> By: Lordy http://www.techper.net/2008/05/26/where-is-ilistaddall-in-as3flex/#comment-859 Lordy Mon, 26 May 2008 21:21:21 +0000 http://www.techper.net/2008/05/26/where-is-ilistaddall-in-as3flex/#comment-859 Try this ColA = ArrayCollection ArrB = Array var tempArr:Array = ColA.source; tempArr.splice(-1,0,ArrB); ColA.refresh(); You'd be better of doing this then call additem for each item. As it will send out a property change event each time, or generating a new arraycollection. Try this
ColA = ArrayCollection
ArrB = Array

var tempArr:Array = ColA.source;
tempArr.splice(-1,0,ArrB);
ColA.refresh();

You’d be better of doing this then call additem for each item. As it will send out a property change event each time, or generating a new arraycollection.

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