You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: enumerator.rb
    path of file: ./repos/artichoke/artichoke-backend/vendor/mruby/mrbgems/mruby-enumerator/mrblib
    
    the code of the file until where you have to start completion: ##
# enumerator.rb Enumerator class
# See Copyright Notice in mruby.h

##
# A class which allows both internal and external itera
    
  def each(*argv, &block)
    obj = self
    if 0 < argv.length
      obj = self.dup
      args = obj.args
      if !args.empty?
        args = args.dup
        args.concat argv
      else
        args = argv.dup
      end