Dynamically defining the initialize method and setting the arity.

dynamic_initialize.rb

class Something
  def self.init(*init_args)

    # this works but...
    define_method(:initialize){|*args|
      # arity is -1
    }

    class_eval %Q<
      def initialize(#{*init_args})
        # this doesn't work
      end
    >
  end
end

# Here I want arity of :initialize to be 2
class Special < Something
  init(:one, :two)
end

# And here I want arity of :initialize to be 3
class Other < Something
  init(:one, :two, :three)
end

thanks guys! @mulder's comment work. I wasn't joining the args