gistfile1.ron

1. Go back to the first shell
2. Sub.unsub("a") // should unsubscribe the first shell from channel "a"
3. Study the callback function defined below. It supports many other message formats.
4. In the second shell window do the following:

  scala> Pub.publish("b", "+c")  // will subscribe the first window to channel "c"
  scala> Pub.publish("b", "+d")  // will subscribe the first window to channel "d"
  scala> Pub.publish("b", "-c")  // will unsubscribe the first window from channel "c"
  scala> Pub.publish("b", "exit")  // will unsubscribe the first window from all channels