gistfile1.rb

one_f, two_f =  File.new("./one.txt", "r"), File.new("two.txt", "r")

one_f.each_line do |l_one|
  two_f.each_line do |l_two|
    puts "#{l_one} -- #{l_two}"
  end
  two_f.rewind
end

[ one_f, two_f ].each {|f| f.close}