From: MonkeeSage <MonkeeSage@...>
Date: 2006-09-21T00:00:14+09:00
Subject: Re: Ducktator - A Duck Type Validator


By asking if object O respond_to? method M, we can impose certain
conditions, and raise an error if those condition aren't met, rather
than raising a runtime error in the middle of the program or getting
wonky behavior. I.e., think of it as pre-emptive TDD. This isn't
_necessary_ for duck-typing, but it certainly seems to be an extension
of it. Do you want your object, O, to act like a file? Then you better
make sure that it respond_to? read() and write()!

Regards.
Jordan