Simple ping/pong with Actors

ex1.rb

require 'actor'

# Execute with Rubinius: rbx ex1.rb

def error_loop(&block)
  loop(&block)
rescue Exception => ex
  puts ex.message
  puts ex.backtrace.join("\n")
end

pong = nil
ping = Actor.spawn do
  error_loop do
    count = Actor.receive
    print '.'
    break puts(count) if count > 1000
    pong << (count + 1)
  end
end
pong = Actor.spawn do
  error_loop do
    count = Actor.receive
    print '-'
    break puts(count) if count > 1000
    ping << (count + 1)
  end
end
ping << 1

# Let the actors process while the main thread sleeps...
sleep 1