The zip-visit library implements zipper-based visitors that allow one to carry and modify state during a depth first traversal of a zipper. There is an extensive description here:
https://github.com/akhudek/zip-visit A short example of a zipper-based version of some. Here n is the node and s is the state: (defn some-tree-visitor [f] (visitor :pre [n s] (if-let [v (f n)] {:state v :break true}))) (defn some-tree [f zipper] (:state (visit zipper nil [(some-tree-visitor f)]))) (def my-zip (z/vector-zip [1 3 [4 5 [6] 7 [8 9]]])) user=> (some-tree #(if (and (number? %) (even? %)) %) my-zip)4 This release includes a bug fix for distinguishing between false and nil. The fast-zip-visit library is identical, but uses fast-zip instead of clojure.zip. Alex -- 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 --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
