On Mar 7, 2009, at 7:17 PM, Adrian Cuthbertson wrote:
> > That's the beauty of this language - there are many ways to skin > the cat! Hmmm...I'm not sure what I'll do with a skinless cat. :) > Here's a version using reduce... > > (defn filt-split [pred col] > (reduce (fn [[a b] x] (if (pred x) [(conj a x) b] [a (conj b x)])) > [[] []] col)) > > (filt-split even? [1 2 3 4 5 6 7 8]) > [[2 4 6 8] [1 3 5 7]] > I like that a lot. As long as the repeated creation of the ephemeral vectors isn't too expensive. > But when you look at separate in clojure.contrib.seq-utils its simple > and elegant; > (defn separate [f s] > [(filter f s) (filter (complement f) s)]) > This is exactly what I'm trying to avoid. I don't want to traverse the collection twice. Aloha, David Sletten --~--~---------~--~----~------------~-------~--~----~ 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 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 -~----------~----~----~----~------~----~------~--~---
