I think you might be using comparator incorrectly. It appears to expect a function that returns a true/false value:
user> (source comparator) (defn comparator "Returns an implementation of java.util.Comparator based upon pred." {:added "1.0"} [pred] (fn [x y] (cond (pred x y) -1 (pred y x) 1 :else 0))) So something like this might work: user> (def string-comparator (comparator (fn [a b] (neg? (.compareTo a b))))) #'user/string-comparator user> (string-comparator "a" "b") -1 user> (string-comparator "b" "a") 1 user> (string-comparator "a" "a") 0 Doesn't seem very useful though. Regards, Stuart On 20 November 2011 14:28, Randy Pensinger <rspensin...@gmail.com> wrote: > I am having a lot of trouble finding a place to mention a possible > clojure bug. Is this it? > > I am trying to write a custom comparator, but the comparator never > seems to work. I simplified the comparator below. > > user=> (def stringComparator > (comparator (fn [a b] > (do > (println (str "comparing '" a "' to '" b "'")) > (.compareTo a b))))) > #'user/stringComparator > user=> (.compare stringComparator "b" "a") > comparing 'b' to 'a' > -1 > user=> (compare "b" "a") > 1 > user=> (clojure-version ) > "1.3.0" > > > Am I doing something wrong? > > -- > 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 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