gistfile1.rb

    sup = Class.new do
      def a; "a"; end
      def b; "b"; end
    end

    sub = Class.new(sup) do
      [:a, :b].each do |name|
        define_method name do
          super()
        end
      end
    end

    sub.new.a.should == "a"
    sub.new.b.should == "b"
    sub.new.a.should == "a"