find_missing_proseries_files.rb

#!/usr/bin/env ruby

lines = STDIN.readlines.map{ |s| s.strip.downcase }
# lines = File.read("files.txt").split(/\n/).map{ |s| s.downcase }

files = {}
lines.each{ |s| files[s] = 1 }
lines.each do |s|
  if s =~ /^(.*?)\.jn1$/ then
    f = $1
    if !files.include?(f) then
      puts "#{f}"
    end
  end
end