On Sep 13, 2011, at 2:39 AM, jingguo wrote: > I get a_message printed twice if I paste the code in a clojure REPL. > But I save the code into a file called foo.clj and use "clj foo.clj" > to run it. I get nothing in stdout. It seems that (printf "a_message > \n") > is not evaluated. Can anybody explain this behavior? Thanks.
`for' yields a lazy sequence, whose elements are not actually evaluated until they are used. The REPL automatically prints the result of each expression you evaluate, which is the only thing that's causing those printfs to get evaluated. Try using `doseq' instead. -- 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
