[Flashcoders] Adding a function to the String prototype

[Pete Miller]

I thought this was as easy as:

String.prototype.traceFoo = function():Void {
        trace("foo");
}
var s:String = new String();
s.traceFoo();


But that results in an error, "There is no method with the name
'traceFoo'."  Well, duh, traceFoo doesn't exist until the code executes,
but how do you tell the compiler that?  How does one add a function to
String?

P.
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