Hi, On Friday, July 11, 2014 11:10:53 AM UTC+2, Cecil Westerhof wrote: > > 2014-07-10 18:34 GMT+02:00 Plínio Balduino <pbal...@gmail.com > <javascript:>>: > >> IMO, ! is used when change any global state. A side effect like print on >> screen is not enough to cause a ! in the name. I think that's why the >> functions print/println don't have ! =) >> > > Than I did it in the 'right' way. In the book the where talking about > side-effects, but only a change in global > > state is more reasonable. >
IMHO, there is a slight difference between "chaning global state" and "can not be used in STM". The STM machinery might call your function several times. If the changes to make to some global state do not matter if being called several times, don't use the bang. One trivial example would be counting the collisions in STM which can be a global state change inc'ing an atom. Logging the same action several times could also be desired in an STM scenario. All this is of course only relevant if you stick to the "official" guideline I cited earlier. Best, stefan -- 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 Note that posts from new members are moderated - please be patient with your first post. 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 --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
