Question

I have an array collection that I would like to limit to say 100 items. I tried setting up a filter function where the return was:

return (myAC.getItemIndex(item) > 100);

but the value was always -1. For whatever reason it couldn’t find the item, even though the item is definitely there.

I’m able to do this with a while loop:

while(myAC.length > 100) myAC.removeItemAt(100);

Is there another way I can accomplish this? Thanks!

Answer 1

Hmm, the best way I can think of is:

myAC = new ArrayCollection( myAC.toArray().slice(0,100) );

Of course, if you could control the size when the ArrayCollection is first constructed, that would be better.

Note that you cannot directly manipulate the source property of the object. From the docs of the source property of ArrayCollection:

The source of data in the ArrayCollection. The ArrayCollection object does not represent any changes that you make directly to the source array. Always use the ICollectionView or IList methods to modify the collection.