Hi, maybe using group-by works?
(defn custom-merge [maps] (->> maps (apply concat) (group-by :id) (sort-by key) (map (comp first val)))) I'm not sure about the efficiency, though. If you don't need the result sorted by :id you might replace the sort and the map by “vals (map first)”. Sincerely Meikel -- 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