I'd use the built-in, partition.... user=> (partition 2 (range 1 9)) ((1 2) (3 4) (5 6) (7 8))
And add a mapping operation user=> (map vec (partition 2 (range 1 9))) ([1 2] [3 4] [5 6] [7 8]) Am I missing a requirement? On Apr 30, 11:55 am, "Mark J. Reed" <markjr...@gmail.com> wrote: > I think you want this: > > (defn pairup [a b & rest] (cons [a b] (if rest (apply pairup rest) []))) > > > > On Thu, Apr 29, 2010 at 3:32 PM, john.holland <jbholl...@gmail.com> wrote: > > I'm pounding my head against the wall trying to understand how to do a > > simple task. What I want to do is write a function that will take a > > even-numbered set of numbers and split them into pairs. > > > What I have right now is the following > > > user> (defn pairup ([a b] [a b])([a b & rest] (cons (pairup a b) > > (apply pairup rest))) ([] [] )) > > #'user/pairup > > user> (pairup 1 2 3 4 5 6 7 8) > > ([1 2] [3 4] [5 6] 7 8) > > user> > > > I can't get the last pair into a vector like the others. > > > Can someone tell me what I am doing wrong? I know there is probably a > > way using the language to do this but I ended up trying to do it from > > scratch as a learning exercise. > > > Thanks > > > John > > > -- > > 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<clojure%2bunsubscr...@googlegroups.com> > > For more options, visit this group at > >http://groups.google.com/group/clojure?hl=en > > -- > Mark J. Reed <markjr...@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 > athttp://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 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
