./ruby/modules_overwriting_methods.txt

download original

module M
  def m
    puts "M#m"
    super
  end
end
 
 
class C
  def m
    puts "C#m"
  end
 
  include M
end
 
c=C.new
c.m    # => C#m


###############

module M
  def self.included(mod)
    mod.module_eval <<-EOS
      def m
        puts "M#m"
        super
      end
    EOS
  end
end


class C
  def m
    puts "C#m"
  end

  include M
end

c=C.new
c.m

# =>
M#m
NoMethodError: super: no superclass method `m'
        from (eval):3:in `m'
        from (irb):22
        from :0

back to ruby