From: James Edward Gray II <james@...>
Date: 2006-09-21T00:17:41+09:00
Subject: Re: [ANN] Ducktator - A Duck Type Validator

On Sep 20, 2006, at 10:07 AM, Simen Edvardsen wrote:

> The problem with #respond_to? is that it only tells you that a method
> is supported.

It doesn't even reliably tell you that:

 >> class Mystery
 >>   def method_missing(meth, *args, &block)
 >>     if meth == :supported
 >>       true
 >>     else
?>       super
 >>     end
 >>   end
 >> end
=> nil
 >> m = Mystery.new
=> #<Mystery:0x32b8e0>
 >> m.supported
=> true
 >> m.respond_to? :supported
=> false

James Edward Gray II