On Jan 2, 5:39 pm, "Mark Volkmann" <r.mark.volkm...@gmail.com> wrote: > For anyone still following this, the latest code that incorporates > many of the suggestions I've received here is > athttp://www.ociweb.com/mark/programming/ClojureSnake.html, replacing my > original version. It now uses refs. I think I have the dosyncs > optimally placed.
I noticed that the new-game function which is called in a transaction does IO (it displays "You killed the snake!"). Transactions may be retried (see http://clojure.org/refs) so that message might get displayed more than once. There's an "io!" macro (doesn't seem to be documented on the web page, but it's in core.clj in the Clojure source with a nice docstring) which serves only to help programmers avoid putting IO in their transactions -- it doesn't magically make IO work right in a transaction. (Refs and transactions don't solve the problem that IO is inherently stateful and destructive -- Clojure relies on the IO system itself to handle that, which it should nicely in your case.) mfh --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~----------~----~----~----~------~----~------~--~---
