deep_dup.rb

class Enumerable
  def deep_dup
    self.map do |*elements|
      if element.is_a?(Enumerable)
        element.deep_dup
      else
        elements.map do |element|
          begin
            duplicate = element.class.allocate
            duplicate.send(:initialize_copy, element)
            duplicate
          rescue
            element
          end
        end
      end
    end
  end
end