002.rb

#!/usr/bin/env ruby

# moves files containing 002 on line 9 to a different directory.

require 'fileutils'

FileUtils.mkdir_p('with002')
FileUtils.mkdir_p('no002')

def contains_zero_zero_two?(filename)
  File.open(filename,'r') do |f|
    lines = f.each_line.take(9)
    puts "- #{lines.last}"
    return lines && lines.last.rstrip.end_with?("002")
  end
end

Dir['*.txt'].each do |file|
  puts "checking #{file}"

  if contains_zero_zero_two?(file)
    FileUtils.mv(file, "with002/#{file}")
  else
    FileUtils.mv(file, "no002/#{file}")
  end
end