Should have been: (evens? nil) On Thu, Sep 20, 2018 at 1:47 PM Alan Thompson <clooj...@gmail.com> wrote:
> `println` always returns `nil`. So it prints "one", returns `nil`, and > you try to execute the form: > > (nil) => NullPointerException > > > user=> (evens? (println “one”)) > one > NullPointerException user/eval239 (NO_SOURCE_FILE:74) > > > On Thu, Sep 20, 2018 at 9:06 AM Orestis Markou <ores...@orestis.gr> wrote: > >> evens? is not a macro, therefore when you do (evens? (println “one”)), >> the println will be evaluated first, and its return value, nil, gets passed >> into the evens function. >> >> >> -- 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.
