Overriding map in a class that extends Array in ActionScript

Question

Say just for fun I want to override Array and redefine map:

public dynamic class MagicArray extends Array {
  public override function map(f:Function, thisObject:* = null):Array {
    var result:Array = [];

    for (var i:int = 0; i < this.length; i++) {
      result.push(f(this[i]));
    }

    return result;
  }
}

We get this error: Method marked override must override another method.

Huh?

So I stripped the override keyword and tried again. Now, everything compiles fine. But if we try to use it:

var a:MagicArray = new MagicArray([1,2,3]);
a.map(function(x) { return x + 1; });

We get the following error:

Error: Ambiguous reference to map.

So what's going on here? How can I override map?

Interesting idea of fun, maybe consider a hobby :-), really though not sure I'll see if I can dig up anything about map — shaunhusain
– shaunhusain, Commented Jul 3, 2012 at 21:20

shaunhusain · Accepted Answer · 2012-07-03 21:25:55Z

1

Did you make the extension dynamic and are you using the namespace see here http://help.adobe.com/en_US/as3/dev/WS5b3ccc516d4fbf351e63e3d118a9b8d829-7fde.html

answered Jul 3, 2012 at 21:25

shaunhusain

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1 Comment

thedayturns Over a year ago

Yeah that's the one. Darn, I had seen that link before but forgot all about that crazy AS3 override stuff. Thanks!

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