2 ms·

Can anyone do the examples in Clojure, please?

• SomeIdiot 15y ago
  1) (map #(* % 2) (range 1 10)) 2) (reduce + (range 1 1000)) 3) (def string "This is an example tweet talking about scala and sbt.") (some #(.contains string %) ["scala", "akka", "play framework", "sbt", "typesafe"]) 4) As a string: (slurp "filename") As a list you could just do: (.split (slurp "filename") "\n") Or if you want a lazy sequence: (line-seq (BufferedReader. (InputStreamReader. (FileInputStream. file-path) "UTF-8"))) There are also contrib libraries for this that do it nicer. 5) (apply prn (map #(str "Happy birthday" (if (= % 4) " dear NAME" " to you")) (range 1 5))) 6) I'm going to leave this blank for now. It's an easy enough problem, but I can't think of a way of doing it in a nifty one-liner. Edit: Ahh thought of it now. group-by does it nicely: (group-by #(> % 60) [49, 58, 76, 82, 88, 90]) which returns a map with the elements keyed to the result of the anonymous function. In this case: {false [49 58], true [76 82 88 90]} 7) Something like (xml-seq (clojure.xml/parse the-xml)) probably. 8) (apply max [14, 35, -7, 46, 98]) (apply min [14, 35, -7, 46, 98]) 9) Clojure has pmap, which is used just like map is, work is just done in parallel. Also Clojure is known for its concurrency features, which I won't go over here. 10) I'm sure this can be done in a similar amount of code in Clojure, though I am not going to try. Any comments/corrections are welcome.