From: "Kroeger, Simon (ext)" <simon.kroeger.ext@...>
Date: 2006-07-24T18:44:50+09:00
Subject: Re: I'll have the duck!

 

> From: transfire@gmail.com [mailto:transfire@gmail.com] 
> Sent: Monday, July 24, 2006 1:10 AM
> 
> [...]
> Now anything that responded to #to_a could use #transform. 
> I'm not sure
> how far this can be taken. Can classes be undone altogegther? But in
> anycase, it seems very cool, and I wonder what kind of overall effect
> it could have on coding?
> 
> T.

Like this *evil grin* ? (Ok, there are still classes...)
------------------------------------------------------------------------
----
class Object
    def method_missing sym, *args
        @@ducks.select{|d| d.first == sym}.each do |duck|
            return send(duck[1], *args) if duck.last.all?{|i|
respond_to? i}
        end
        super
    end
    
    def self.duck sym, real , *interface
        (@@ducks ||= []) << [sym, real, interface]
    end
end

def i_next_to_s
    succ.to_s
end

def f_next_to_s
    ceil.to_s
end

Object.duck :next_to_s, :i_next_to_s, :succ, :to_s
Object.duck :next_to_s, :f_next_to_s, :ceil, :to_s

p(41.next_to_s) #=> "42"
p('A'.next_to_s) #=> "B"
p(5.5.next_to_s) #=> "6"
------------------------------------------------------------------------
----

cheers

Simon