Question

I don’t fully understand the advantages/disadvantages between these two methods of typecasting in this example:

for each(var i:DisplayObject in _display)
{
    trace(i as Sprite);
    trace(Sprite(i));
}

Is there a recommendation around this at all? I’ve always wrapped in Class() like the latter example but as sometimes reads more easily.

Answer 1

For what I understand, the difference is TypeError.

var o:Object = "test";

trace( o as MovieClip ); // displays: null
trace ( MovieClip ( o ) ); // generates a TypeError

http://archive.darronschall.com/weblog/2006/02/actionscript-3-casting.html