From: "David A. Black" <dblack@...>
Date: 2004-06-07T22:27:41+09:00
Subject: Re: How to ducktype a Hash?

Hi --

On Mon, 7 Jun 2004, Dave Burt wrote:

> param.respond_to? '[]' and
> param.respond_to? '[]=' and
> !param.kind_of? String and
> !param.kind_of? Array

That's not duck typing (see Dave's description(s), especially recent
clarification that duck typing isn't about checking things) -- also,
it would run aground on:

  class C
    def []
      puts "Hello!"
    end
  end

I think what we may be running into is the possibility that
"ducktyping a Hash" is in a sense a contradiction in terms.


David

-- 
David A. Black
dblack@wobblini.net