From: Stefano Crocco <stefano.crocco@...>
Date: 2008-06-04T22:54:28+09:00
Subject: Re: Module philosophy

On Wednesday 04 June 2008, Leslie Viljoen wrote:
> modifies the one object. (2) Philosophically, is there any reason why
> extend can't be used
> in the same way on classes? (ie. String.extend(Crc))

Because String.extend(Crc) would add the instance methods of the Crc module as 
class methods of String, not as instance methods. This would mean you could 
do:

String.method_defined_in_crc

but not

"hello".method_defined_in_crc

If you don't like the idea of reopening the class, you can use include with 
send:

String.send :include, Crc

Stefano