Thanks everybody On Wed, Jul 4, 2012 at 2:16 PM, Tassilo Horn <tass...@member.fsf.org> wrote:
> John Holland <jbholl...@gmail.com> writes: > > Hi John, > > > If I want to get the last n elements of a list or vector I am doing > > the following: > > > > (reverse (take n (reverse thelist))) > > > > Is there a better way to do this? > > For vectors, you can do that much more efficiently using subvec: > > (subvec my-vec (- (count vec) n)) > > For all sequential collections (lists, vectors, and sequences), I think > this should be better: > > (drop (- (count my-seq) n) my-seq) > > That's because lists, vectors, seqs (with the exception of lazy seqs) > usually implement the Counted abstraction meaning that (count coll) is a > constant time operation. > > Bye, > Tassilo > > -- > 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 > -- ______________________________________ Note new email address jbholl...@gmail.com -- 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
