2018-01-21 23:33:32 +08:00
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<!doctype html>
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<title>CodeMirror: Clojure mode</title>
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<meta charset="utf-8"/>
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<link rel=stylesheet href="../../doc/docs.css">
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<link rel="stylesheet" href="../../lib/codemirror.css">
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<script src="../../lib/codemirror.js"></script>
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2018-10-07 18:02:07 +08:00
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<script src="../../addon/edit/closebrackets.js"></script>
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<script src="../../addon/edit/matchbrackets.js"></script>
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2018-01-21 23:33:32 +08:00
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<script src="clojure.js"></script>
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<style>.CodeMirror {background: #f8f8f8;}</style>
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<div id=nav>
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2018-10-07 18:02:07 +08:00
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<a href="https://codemirror.net"><h1>CodeMirror</h1><img id=logo src="../../doc/logo.png"></a>
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2018-01-21 23:33:32 +08:00
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<ul>
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<li><a href="../../index.html">Home</a>
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<li><a href="../../doc/manual.html">Manual</a>
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<li><a href="https://github.com/codemirror/codemirror">Code</a>
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</ul>
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<ul>
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<li><a href="../index.html">Language modes</a>
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<li><a class=active href="#">Clojure</a>
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</ul>
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</div>
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<article>
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<h2>Clojure mode</h2>
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<form><textarea id="code" name="code">
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2018-10-07 18:02:07 +08:00
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(ns game-of-life
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"Conway's Game of Life, based on the work of
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Christophe Grand (http://clj-me.cgrand.net/2011/08/19/conways-game-of-life)
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and Laurent Petit (https://gist.github.com/1200343).")
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2018-01-21 23:33:32 +08:00
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2018-10-07 18:02:07 +08:00
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;;; Core game of life's algorithm functions
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2018-01-21 23:33:32 +08:00
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2018-10-07 18:02:07 +08:00
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(defn neighbors
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"Given a cell's coordinates `[x y]`, returns the coordinates of its
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neighbors."
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[[x y]]
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2018-10-07 18:02:07 +08:00
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(for [dx [-1 0 1]
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dy (if (zero? dx)
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[-1 1]
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[-1 0 1])]
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2018-01-21 23:33:32 +08:00
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[(+ dx x) (+ dy y)]))
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(defn step
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"Given a set of living `cells`, computes the new set of living cells."
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[cells]
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2018-10-07 18:02:07 +08:00
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(set (for [[cell n] (frequencies (mapcat neighbors cells))
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:when (or (= n 3)
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(and (= n 2)
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(cells cell)))]
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2018-01-21 23:33:32 +08:00
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cell)))
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2018-10-07 18:02:07 +08:00
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;;; Utility methods for displaying game on a text terminal
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(defn print-grid
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"Prints a `grid` of `w` columns and `h` rows, on *out*, representing a
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step in the game."
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[grid w h]
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(doseq [x (range (inc w))
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y (range (inc h))]
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(when (= y 0) (println))
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(print (if (grid [x y])
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"[X]"
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" . "))))
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(defn print-grids
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"Prints a sequence of `grids` of `w` columns and `h` rows on *out*,
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representing several steps."
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[grids w h]
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2018-10-07 18:02:07 +08:00
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(doseq [grid grids]
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(print-grid grid w h)
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(println)))
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2018-01-21 23:33:32 +08:00
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2018-10-07 18:02:07 +08:00
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;;; Launches an example grid
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2018-10-07 18:02:07 +08:00
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(def grid
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"`grid` represents the initial set of living cells"
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#{[2 1] [2 2] [2 3]})
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2018-01-21 23:33:32 +08:00
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2018-10-07 18:02:07 +08:00
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(print-grids (take 3 (iterate step grid)) 5 5)</textarea></form>
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2018-01-21 23:33:32 +08:00
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<script>
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2018-10-07 18:02:07 +08:00
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var editor = CodeMirror.fromTextArea(document.getElementById("code"), {
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autoCloseBrackets: true,
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lineNumbers: true,
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matchBrackets: true,
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mode: 'text/x-clojure'
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});
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2018-01-21 23:33:32 +08:00
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</script>
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<p><strong>MIME types defined:</strong> <code>text/x-clojure</code>.</p>
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</article>
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