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- <article>
- <h2>Clojure mode</h2>
- <form><textarea id="code" name="code">
- (ns game-of-life
- "Conway's Game of Life, based on the work of
- Christophe Grand (http://clj-me.cgrand.net/2011/08/19/conways-game-of-life)
- and Laurent Petit (https://gist.github.com/1200343).")
- ;;; Core game of life's algorithm functions
- (defn neighbors
- "Given a cell's coordinates `[x y]`, returns the coordinates of its
- neighbors."
- [[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 neighbors cells))
- :when (or (= n 3)
- (and (= n 2)
- (cells cell)))]
- cell)))
- ;;; Utility methods for displaying game on a text terminal
- (defn print-grid
- "Prints a `grid` of `w` columns and `h` rows, on *out*, representing a
- step in the game."
- [grid w h]
- (doseq [x (range (inc w))
- y (range (inc h))]
- (when (= y 0) (println))
- (print (if (grid [x y])
- "[X]"
- " . "))))
- (defn print-grids
- "Prints a sequence of `grids` of `w` columns and `h` rows on *out*,
- representing several steps."
- [grids w h]
- (doseq [grid grids]
- (print-grid grid w h)
- (println)))
- ;;; Launches an example grid
- (def grid
- "`grid` represents the initial set of living cells"
- #{[2 1] [2 2] [2 3]})
- (print-grids (take 3 (iterate step grid)) 5 5)</textarea></form>
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- <p><strong>MIME types defined:</strong> <code>text/x-clojure</code>.</p>
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