From: Edgardo Hames <ehames@...>
Date: 2004-10-06T03:20:12+09:00
Subject: Re: A ruby course

On Wed, 6 Oct 2004 02:24:12 +0900, Brian Schr�der
<ruby@brian-schroeder.de> wrote:
> 
> Anybody has an idea for an exercise on extending existing classes. So
> far the only thing I have come up with is:
> 

Taken from the Design Patterns book, Decorator pattern:

"Attach additional responsibilities to an object dynamically.
Decorators provide a flexible alternative to subclassing for extending
functionality."

You could extend Integer with a fibonacci method, so that you can
write something like:

puts 0.fibonacci       > 0
puts 1.fibonacci       > 1
puts 5.fibonacci       > 5

My 2 cents.
Ed

-- 
" Don't relax!  It's only your tension that's holding you together."