(it's also zero-indexed, unlike yours, but that isn't a big change) On Mon, Dec 22, 2014 at 9:17 PM, Ben Wolfson <wolf...@gmail.com> wrote:
> This is a little more concise: > > (->> "00101110101110" > (map-indexed vector) > (partition-by second) > (filter #(= (second (first %)) \1)) > (map (comp (fn [[f & tail]] > (if rest (str f "-" (last tail)) (str f))) > (partial map first)))) > > On Mon, Dec 22, 2014 at 8:09 PM, Pauli <pauli.mat...@gmail.com> wrote: > >> Hi, all: >> >> I'm tring to solve such a problem: Given a string consisting of "1" and >> "0", find all the locations of "1", and print them in the format of >> intervals. >> >> For example: "00101110101110" => 3, 5-7, 9, 11-13 >> >> Here is my solution: >> >> (defn bar [x] >> (letfn [(foo [mystr] >> (->> >> (map-indexed vector mystr) >> (filter #(= (second %) \1)) >> (map (comp inc first)) >> (partition-all 2 1) >> (filter #(= 2 (count %)))))] >> (let [y (map #(if (> (- (second %) (first %)) 1) (print (first %) ", " >> (second %) "-")) (foo x))] >> (print (ffirst y) "-" y (last (last (foo x))))))) >> >> >> With the code above, I got many nils in the result: >> >> (bar "00101110101110") => 3 , 5 -nil - (nil nil 7 , 9 -nil 9 , 11 -nil >> nil nil nil) 13 >> >> How can I remove them? >> >> And, is there any way to make my code more concise? >> >> >> >> -- >> 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. >> > > > > -- > Ben Wolfson > "Human kind has used its intelligence to vary the flavour of drinks, which > may be sweet, aromatic, fermented or spirit-based. ... Family and social > life also offer numerous other occasions to consume drinks for pleasure." > [Larousse, "Drink" entry] > > -- Ben Wolfson "Human kind has used its intelligence to vary the flavour of drinks, which may be sweet, aromatic, fermented or spirit-based. ... Family and social life also offer numerous other occasions to consume drinks for pleasure." [Larousse, "Drink" entry] -- 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.
