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| <article> | |
| <h2>Clojure mode</h2> | |
| <form><textarea id="code" name="code"> | |
| ; Conway's Game of Life, based on the work of: | |
| ;; Laurent Petit https://gist.github.com/1200343 | |
| ;; Christophe Grand http://clj-me.cgrand.net/2011/08/19/conways-game-of-life | |
| (ns ^{:doc "Conway's Game of Life."} | |
| game-of-life) | |
| ;; Core game of life's algorithm functions | |
| (defn neighbours | |
| "Given a cell's coordinates, returns the coordinates of its neighbours." | |
| [[x y]] | |
| (for [dx [-1 0 1] dy (if (zero? dx) [-1 1] [-1 0 1])] | |
| [(+ dx x) (+ dy y)])) | |
| (defn step | |
| "Given a set of living cells, computes the new set of living cells." | |
| [cells] | |
| (set (for [[cell n] (frequencies (mapcat neighbours cells)) | |
| :when (or (= n 3) (and (= n 2) (cells cell)))] | |
| cell))) | |
| ;; Utility methods for displaying game on a text terminal | |
| (defn print-board | |
| "Prints a board on *out*, representing a step in the game." | |
| [board w h] | |
| (doseq [x (range (inc w)) y (range (inc h))] | |
| (if (= y 0) (print "\n")) | |
| (print (if (board [x y]) "[X]" " . ")))) | |
| (defn display-grids | |
| "Prints a squence of boards on *out*, representing several steps." | |
| [grids w h] | |
| (doseq [board grids] | |
| (print-board board w h) | |
| (print "\n"))) | |
| ;; Launches an example board | |
| (def | |
| ^{:doc "board represents the initial set of living cells"} | |
| board #{[2 1] [2 2] [2 3]}) | |
| (display-grids (take 3 (iterate step board)) 5 5) | |
| ;; Let's play with characters | |
| (println \1 \a \# \\ | |
| \" \( \newline | |
| \} \" \space | |
| \tab \return \backspace | |
| \u1000 \uAaAa \u9F9F) | |
| ;; Let's play with numbers | |
| (+ 1 -1 1/2 -1/2 -0.5 0.5) | |
| </textarea></form> | |
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| <p><strong>MIME types defined:</strong> <code>text/x-clojure</code>.</p> | |
| </article> | |