From: dblack@...
Date: 2006-07-25T05:36:21+09:00
Subject: Re: I'll have the duck!

Hi --

On Tue, 25 Jul 2006, Daniel DeLorme wrote:

> benjohn@fysh.org wrote:
>> I also like it because I don't think that there's anything especially
>> fundamental about classes. With predicate classes, all you're really
>> saying is that "if I've got something that can do x and y, then I know
>> that I can equally validly think of it as something that can do z".
>
> The concept really piqued my interest, and since ruby gives us such nice
> metaprogramming abilities, why not do it?
>
>
> module DuckTyping
>  @@quacks = Hash.new{ |h,k| h[k] = {} }
[...]
> Duck.new.quack_loudly #=> "QUACK!"
> Dog.new.quack_loudly  #=> NoMethodError

I guess you'd have to think of a new name to refer to what has in the
past been called "duck typing" :-)


David

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