From: Joel VanderWerf <vjoel@...>
Date: 2002-09-29T05:55:23+09:00
Subject: Re: alias versus method_missing

Lyle Johnson wrote:
> All,
> 
> Before I make this harder than it is, I wanted to double-check. Let's
> say I have a base class:
> 
>      class Base
>        def foo
>          puts "inside Base#foo"
>        end
>      end
> 
> and another class derived from Base:
> 
>      class Derived < Base
>        def foo
>          puts "inside Derived#foo"
>        end
>      end
...
>      class Base
>        def method_missing(mid, *args)
>          case mid
>            when :bar
>              foo(*args)
>            else
>              super # hand off to Base's base class...
>          end
>        end
>      end

Another reason not to use method_missing:

   Derived.new.bar     # ==> inside Derived#foo

   class Object
     def bar
       puts "inside Object#bar"
     end
   end

   Derived.new.bar     # ==> inside Object#bar

The superclass has overriden the subclass!