file-writing_thread

gistfile1.rb

t = Thread.new do
  tx=File.new("text.txt", "w+")
  (0..2).each do |n|
    begin    
      File.open("part#{n}.txt") do |f|
        tx.write(f.readline)
      end
    rescue Errno::ENOENT
      puts "error #{n}"
    end
  end 
tx.close
end
t.join