From: Robin Stocker <robin@...>
Date: 2006-08-01T00:38:53+09:00
Subject: Re: Weird elusive bug using Comparable

Pedro C�rte-Real wrote:
>  #ideas on making this much shorter are welcome
>  def <=>(other)
>    VALS.each do |key|
>      v1 = self.send(key)
>      v2 = other.send(key)
> 
>      result = (v1 <=> v2)
>      if result != 0
>        return result
>      end
>    end
>    0
>  end
> end

How about something like this (untested):

def <=>(other)
   VALS.map{ |key| self.send(key) } <=> VALS.map{ |key| other.send(key) }
end