On Wed, Nov 24, 2010 at 11:53 PM, David Sletten <da...@bosatsu.net> wrote: > > On Nov 24, 2010, at 11:45 PM, Ken Wesson wrote: > >> On Wed, Nov 24, 2010 at 11:11 PM, Baishampayan Ghose <b.gh...@gmail.com> >> wrote: >>>> I just needed a function for every-nth element in a sequence.. I know it >>>> can be trivially implemented as .. >>>> (defn every-nth [n coll] >>>> (letfn [(evn [cn s] >>>> (when s >>>> (if (= cn 1) >>>> (lazy-seq (cons (first s) (evn n (next s)))) >>>> (evn (dec cn) (next s)))))] >>>> (evn n coll))) >>>> But I remember seeing inbuilt function .. can anybody help me find it? >>> >>> take-nth should do the job - >>> http://clojure.github.com/clojure/clojure.core-api.html#clojure.core/take-nth >> >> And it can be even more trivially implemented as (map first (partition >> n coll)). :) > > (map first (partition 1 n coll))
Yes, that seems to work too, but it's also two characters longer. :) -- 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
