Geoff Youngs wrote:
..
> So, for the above example, using Interface::Enumerable could 
> allow an array class to use the brute force Enumerable#max, 
> but wouldn't prevent the Range class from implementing a much 
> simpler and faster Range#max.

Whats the improvement here. We can already fine tune
included method for each ``includy''


class Range
  def max
    unless exclude_end?
       self.end if self.begin <= self.end
    else
      # the super refers to Enumerable#max 
      super if self.begin <= self.end 
    end
  end
end 

but maybe I missunderstood  something(s)?


/Christoph