On Mon, Nov 22, 2010 at 12:35 AM, Alex Osborne <a...@meshy.org> wrote: > Alex Baranosky <alexander.barano...@gmail.com> writes: > >> So for the case I had that method worked. I wonder though if I had >> wanted to sort by multiple keys, with some of the keys sorting in >> reverse order and others in regular order, how I could do that... Say >> last name ascending, date of >> birth descending for example. > > Write your own compare function which does that. For example, for the > general case: > > (def asc compare) > (def desc #(compare %2 %1)) > > (defn compare-by [[k comp & more] x y] > (let [result (comp (k x) (k y))] > (if (and (zero? result) (seq more)) > (recur more x y) > result))) > > (sort #(compare-by [:last-name asc, :date-of-birth desc] %1 %2) coll)
+1 -- 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
