Subclassing an AS3 Array: how to get array elements (this[0] does not work)?

If I am a subclass of an Array, how do I access an element?

class ArrayOfFoo extends Array
{
   public function getFooAt(anIndex : int) : Foo
   {
        return this[anIndex] as Foo;   //  <---- looks for an object attribute (named "0", for example)
   }
}

I could wrap an array instead of subclassing it, however lacking a universal IArray interface, that is less than useful for standard and custom functions expecting an Array.

Vectors do not allow subclassing at all, so they won't hel开发者_开发知识库p.

Thanks

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Unfortunately this is not as straight forward as you think. Check Extending the Array class on Adobe livedocs for the detail method of extending an array.