Created
May 18, 2016 12:33
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Bowling kata in 11 lines of clojure
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| (defn- sum [s] (reduce + s)) | |
| (defn score | |
| ([gs] (let [s (clojure.string/replace gs #"\d/" #(str (nth % 0) (char (- 106 (int (nth % 0)))))), | |
| g (map #(case % \X 10 \- 0 (- (int %) 48)) s)] | |
| (score g 1))) | |
| ([game frame] | |
| (cond | |
| (= frame 10) (sum game) | |
| (= (first game) 10) (+ (sum (take 3 game)) (score (drop 1 game) (inc frame))), | |
| (= (sum (take 2 game)) 10) (+ (sum (take 3 game)) (score (drop 2 game) (inc frame))), | |
| :else (+ (sum (take 2 game)) (score (drop 2 game) (inc frame)))))) |
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Line 3 deals with the spares
Line 4 deals with strikes and misses
Together, those lines produce a list of all the numbers of pins knocked down during the game, which is then processed by the 2-arity version of the function.