> Subvec, however, isn't lazy. That's true. I just realized there's another problem with my approach as well: it does not preserve elements before the first true index.
user=> (partition-when true? [false true]) ([true]) When the result should probably be: user=> (partition-when true? [false true]) ((false) (true)) On Nov 27, 2:05 pm, Ken Wesson <kwess...@gmail.com> wrote: > Subvec, however, isn't lazy. This is: > > (defn split-when [pred coll] > (let [ipred (complement pred) > bits (iterate > (fn [[out coll]] > (let [[a b] (split-with ipred (rest coll))] > [(cons (first coll) a) b])) > [nil coll])] > (map #(first (first %)) > (take-while #(seq (second (second %))) (map vector (rest bits) bits))))) > > user=> (take 10 (split-when #(= 0 (rem % 3)) (iterate inc 1))) > ((1 2) > (3 4 5) > (6 7 8) > (9 10 11) > (12 13 14) > (15 16 17) > (18 19 20) > (21 22 23) > (24 25 26) > (27 28 29)) -- 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
