Search ArrayCollection for a property on an Object
A common scenario is to have an ArrayCollection of Objects and to want to find a particular Object using some sort of criteria. Now Actionscript does provide the ability to find an element within an ArrayCollection using the getItemIndex(element) method, but for that you need to provide the exact element you are looking for as an argument. There is no good way to find an element given a match on a property - kind of like a search rather than a lookup. An implementation of that as a utility function is very simple*, but I can’t think of a better way to do it:
// search an ArrayCollection for a property on an object static public function getItemIndexByProperty(array:ArrayCollection, property:String, value:String):Number { for (var i:Number = 0; i < array.length; i++) { var obj:Object = Object(array[i]) if (obj[property] == value) return i; } return -1; }
*Of course, this only works with String properties.
Hi Sourav,
Good trick to search on arrayCollection.
Thanks,
Avi
Comment by Avi — February 12, 2009 @ 11:27 am
Make property an Object and you can use it to search for more than just strings.
Comment by Ben — April 23, 2009 @ 5:18 pm