I think subvec is likely what you're looking for, but I also wanted to mention take-last for the sake of completeness.
On Wed, Jul 4, 2012 at 2:16 PM, Tassilo Horn <[email protected]> wrote: > John Holland <[email protected]> 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 [email protected] > Note that posts from new members are moderated - please be patient with your > first post. > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to [email protected] Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/clojure?hl=en
