flash as3 - how do I find an object's index in an array

Question

how do you find an object's index / position within an array in flash actionscript 3? I am trying to set a conditional up in a loop where, if an object's id is equal to the current_item variable, I can return its position within the array.

Rion Williams · Accepted Answer · 2011-02-23 16:03:02Z

14

Something like this might help you - this example returns the position of the value 7:

private var _testArray:Array = new Array(5, 6, 7, 8, 9, 8, 7, 6);

        public function ArrayTest() 
        {   
            trace (_testArray.indexOf(7));
            //Should output 2
        }

so for your needs:

 item variableToLookFor = 9 // Your variable here

 private var _testArray:Array = new Array(5, 6, 7, 8, 9, 8, 7, 6);

        public function ArrayTest() 
        {
            trace (_testArray.indexOf(variableToLookFor));
            //Should output 4
        }

This will return a -1 if your item doesn't exist, otherwise it will output the position in the array.

If you need more information you can check here for an article on AS3 Arrays.

edited Feb 23, 2011 at 16:03

answered Feb 23, 2011 at 15:44

Rion Williams

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1 Comment

Aditya P Over a year ago

If this is a large array of say 8k elements which would be the fastest and efficient way to get the index?

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