Question

This works:

var o:Object = {};
o['one'] = 1;

But if I create my class, and try the same it doenst work.

class MyClass {}
var m:MyClass = new MyClass;
m['one'] = 1; // Error: Not possible to create property 'one'

Why?

Answer 1

Try :

 dynamic class MyClass {}

If you look at the Object class it is defined like this :

public dynamic class Object extends *

You can add properties to dynamic classes at runtime.