From: Thomas Wieczorek <wieczo.yo@...>
Date: 2008-02-02T03:50:44+09:00
Subject: Re: Gedankenexperiment on method duck type safety

Though I think that is_a? should be used sparsely. I like the idea of
gradual typing: Develop your program first without type definitions
and then when you think some regions need speed up, add the used types
of the objects.