From: Vladimir Dozen <Vladimir.Dozen@...>
Date: 2002-03-15T22:50:21+09:00
Subject: Re: key comparision inside Hash

ehlo.

> Seeing your lovely functional requirement, I couldn't help myself, so I
> had a stab at it:


 > module NaiveHashable
 >   def hash
 >     inst = instance_variables
 >     h = type.hash ^ inst.size.hash
 >     inst.each{|i|
 >       h ^= i.hash ^ eval(i).hash
 >     }
 >     h
 >   end
 > end

   Wow! I cannot think in Ruby yet :(((
   Your solution is enough for me, and looks much more
   Ruby-way... except for: I would call module Hashable
   or HashKeyable, and include realization of eql? method
   with similar algorithm.

  Then, the requirement for key objects would be "implement

   hash and eql? methods OR include HashKeyable module".

dozen