From: Aredridel <aredridel@...>
Date: 2004-09-03T05:42:16+09:00
Subject: Re: Not just $SAFE, but damn $SAFE

>  Sincerely I don't understand (I know, I'm stupid) but why don't you define
>  classes that you want to trust and give a result only when an object
>  belong to theses classes ?

The problem is in finding out what class something is.

obj.class # Bad -- class can be overridden to be evil

obj.instance_of? # Bad -- same as #class

Class === obj # Bad, because you can define an evil subclass.