Hi!
I've noticed that there is group-by in clojure 1.2. However it uses
reduce and conj.
Doesn't it consume all sequence at once?
Here I have lazy version I have written once:
(defn group-by
[input]
(lazy-seq
(when-let [s (seq input)]
(let [k (ffirst s) [vs r] (split-with #(-> % first (= k)) s)]
(cons [k vs] (group-by r))))))
--
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
