Thanks, I had fun with this! This isn't more concise, but I went in a little a different direction, trying to pull the various concerns apart. In particular I had fun separating: - the idea of intervals for which any predicate passed from the specific case of 0/1 equality comparison - the string representation of intervals from their computation - the idea of one-indexing from the rest of the problem
https://gist.github.com/trptcolin/a573561ac9262092f254 - Colin p.s. There was no need for me to use `juxt` in `format-interval` but honestly, if you're not going to use `juxt` at every conceivable opportunity, why bother? On Monday, December 22, 2014 10:09:06 PM UTC-6, Pauli 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.
