On Sun, May 23, 2010 at 21:21, Michael Gardner <gardne...@gmail.com> wrote: > I need to use a predicate to divide one list into two, one containing all > values for which the predicate is true, and the other with all remaining > values. I can do this easily by filtering twice, once with the predicate and > once with its complement, but is there some core or contrib function that > will do this more directly and efficiently? I'm not sure what the best way to > search for something like this would be.
Yes and No. Yes: such a function exists: clojure.contrib.seq-utils/separate No: It's not as efficient as you'd like. It does just what you describe in your post: it filters twice. (defn separate "Returns a vector: [ (filter f s), (filter (complement f) s) ]" [f s] [(filter f s) (filter (complement f) s)]) // Ben -- 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
