From: Chris Morris <chrismo@...>
Date: 2002-09-14T04:29:12+09:00
Subject: Re: General ?s about a couple of Ruby features

> Modifying class A is useful when:
>   a) there is a bug in class A and we want to fix the bug without
>      shutting down the application.
>   b) class A is missing a method that a method in class B needs to have
>      defined in order to accept an object of class A as a parameter.
>   c) for creating delegate objects (objects that intercept method calls
>      and pass them onto another object) without using method_missing.

It's also handy because it allows you to break out your class and module
code into different files if necessary. This is more common perhaps using
modules for namespaces. If I have 12 classes in 12 files, but want them all
in the same module/namespace, no problem.

Chris