How to make an associative array in actionscript indexed by Point?

Question

I'd like my associative array indexed by Point (or, in general, an Object) that has a semantic equality. Unfortunately

var p:Point = new Point(1, 1);
var q:Point = new Point(1, 1);

var dict:Dictionary = new Dictionary();
dict[p] = 5;
trace(dict[p]); // => 5
trace(dict[q]); // => undefined

because

trace(p===q); // => false

Is there any way to tell Dictionary how to order its keys, or is there a different class to use for this type of thing?

Answer 1

Apparently if you use Object, it seems to work as intended:

var p:Point = new Point(1, 1);
var q:Point = new Point(1, 1);
var r:Point = new Point(1, 2);

var dict:Object = new Object();
dict[p] = 5;
trace(dict[p]); // => 5
trace(dict[q]); // => 5
trace(dict[r]); // => undefined

Answer 2

A Dictionary will place objects in different bins, even if they are "equal". If the two objects used as keys result in a collision on insertion, the Dictionary will simply use the next available bin to place the second object, because, as you said, p!==q. But using Object (which is still, in essence, a map) is different, it only checks if p.equals(q).