module Argu

  attr_reader :lis

  def initialize
   @lis = Array.new
  end

  pro = ''

  def eval_stdin
    if ARGV.length > 0
      if ARGV[0] == '-l'
        pro = `ls`
        @lis = pro.split(/\n/)
      elsif ARGV[0] == '-f'
        @lis = IO.readlines(ARGV[1])
      else
        @lis = ARGV
      end
    else
      puts "No args given, exiting...\n"
      exit
    end
  end
end
##So, using this module would be like this:
##(in your program)

## include Argu
## eval_stdin
## @lis.each{|f|
## #do something...
## }

## and you would run your program:
## prompt% ruby myprogram.rb -l

##this comes handy when you have, let's say, some thousands of text files in a ##directory and you would like your program to parse them.