Both `:when` and `:while` tests if an element should be used when building the resulting sequence. If the `:when` part evaluates to false (or nil) the element is skipped and the list comprehension continues with the next element in the source sequence. `:while` on the other hand ends the list comprehension when the test evaluates to false (or nil) and returns the sequence generated thus far.
Note the difference between (for [x [2 4 6 7 8] :when (even? x)] x) ; => (2 4 6 8) and (for [x [2 4 6 7 8] :while (even? x)] x) ; => (2 4 6) Hope that helps. Jonas On Tuesday, August 21, 2012 1:28:50 PM UTC+3, Nicolas Oury wrote: > > Dear all, > > What is the meaning of :while in a for? > I understand :when, and also that :while jumps more element when the > condition is not met, > but where does it jump to exactly? > > Best regards, > > Nicolas. > -- 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
