// Instead of...
var someThing:SomeClass;
for (var i:Number = 0; i < someVector.length; i++)
{
    someThing = someVector[i];
    // Do stuff with someThing...
}


// Do this:
someVector.forEach = _doSomething;

private function _doSomething(element:SomeClass, index:int, vector:Vector.<SomeClass>):void
{
    // Do stuff with element:SomeClass
}