>>>>> "E" == Eustaquio Rangel de Oliveira <eustaquiorangel / yahoo.com> writes:

E> Sorry if I'm missing some point here, because I'm a Ruby newbie, but is 
E> that correct? I mean, seems that we need to write more code with this kind 
E> of behaviour.

 it's strange your model :-)))

   class CarBuilder
      def self.inherited(kl)
         kl.instance_eval { @total_of_cars = 0 }
         super
      end
   
      def build
         puts "#{self.class} building another car ..."
         self.class.instance_eval { @total_of_cars += 1 }
      end
   
      def total_of_cars
         "#{self.class} built #{self.class.instance_eval { @total_of_cars }} cars"
      end
   end
   
   class Honda < CarBuilder
   end
   
   class Ford < CarBuilder
   end



Guy Decoux