walk is good but it's not lazy. If you want to preserve laziness you can do:
(defn map-vals "transform a map by mapping it's keys to different values." [f m] (into {} (map (fn [[key val]] [key (f val)]) m))) This is also nice because you can then write functions whose arguments are [val] instead of [key val] and ignoring the key. --Robert McIntyre On Mon, Sep 6, 2010 at 12:06 PM, Sunil S Nandihalli <sunil.nandiha...@gmail.com> wrote: > (clojure.walk/walk (fn [[key val]] [key (* 2 val)]) identity {:a 1 :b 2}) > > On Mon, Sep 6, 2010 at 9:26 PM, Sunil S Nandihalli > <sunil.nandiha...@gmail.com> wrote: >> >> Nicolas >> I am not sure of the performance characteristics.. but you may want to >> look at >> (clojure.walk/walk #(do (println "inner : " %) %) #(do (println "outer : " >> %) %) {:a 1 :b 2}) >> >> Best regards, >> Sunil. >> On Mon, Sep 6, 2010 at 9:10 PM, Nicolas Oury <nicolas.o...@gmail.com> >> wrote: >>> >>> Dear all, >>> >>> is there a function to map a function to all values in a map, keeping >>> the same keys? >>> Reducing from the seqed map seems a bit slower that what could be done >>> directly... >>> >>> Best, >>> >>> Nicolas. >>> >>> -- >>> 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 -- 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