Break a loop gracefully on Ctrl-C

loop_breaker.rb

Signal.trap("INT") { throw :exit_loop }
def aaa
  catch :exit_loop do
    loop do
      puts 'foo'
      p Benchmark.realtime { sleep 1 }
      puts 'bar'
    end
  end
  Signal.trap('INT', 'DEFAULT')
  puts "Loop exited!"
end