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1 <!doctype html>
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2
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3 <title>CodeMirror: Clojure mode</title>
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4 <meta charset="utf-8"/>
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5 <link rel=stylesheet href="../../doc/docs.css">
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6
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7 <link rel="stylesheet" href="../../lib/codemirror.css">
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8 <script src="../../lib/codemirror.js"></script>
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9 <script src="../../addon/edit/closebrackets.js"></script>
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10 <script src="../../addon/edit/matchbrackets.js"></script>
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11 <script src="clojure.js"></script>
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12 <style>.CodeMirror {background: #f8f8f8;}</style>
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13 <div id=nav>
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14 <a href="https://codemirror.net/5"><h1>CodeMirror</h1><img id=logo src="../../doc/logo.png" alt=""></a>
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15
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16 <ul>
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17 <li><a href="../../index.html">Home</a>
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18 <li><a href="../../doc/manual.html">Manual</a>
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19 <li><a href="https://github.com/codemirror/codemirror5">Code</a>
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20 </ul>
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21 <ul>
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22 <li><a href="../index.html">Language modes</a>
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23 <li><a class=active href="#">Clojure</a>
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24 </ul>
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25 </div>
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26
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27 <article>
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28 <h2>Clojure mode</h2>
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29 <form><textarea id="code" name="code">
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30 (ns game-of-life
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31 "Conway's Game of Life, based on the work of
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32 Christophe Grand (http://clj-me.cgrand.net/2011/08/19/conways-game-of-life)
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33 and Laurent Petit (https://gist.github.com/1200343).")
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34
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35 ;;; Core game of life's algorithm functions
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36
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37 (defn neighbors
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38 "Given a cell's coordinates `[x y]`, returns the coordinates of its
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39 neighbors."
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40 [[x y]]
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41 (for [dx [-1 0 1]
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42 dy (if (zero? dx)
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43 [-1 1]
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44 [-1 0 1])]
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45 [(+ dx x) (+ dy y)]))
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46
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47 (defn step
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48 "Given a set of living `cells`, computes the new set of living cells."
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49 [cells]
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50 (set (for [[cell n] (frequencies (mapcat neighbors cells))
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51 :when (or (= n 3)
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52 (and (= n 2)
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53 (cells cell)))]
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54 cell)))
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55
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56 ;;; Utility methods for displaying game on a text terminal
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57
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58 (defn print-grid
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59 "Prints a `grid` of `w` columns and `h` rows, on *out*, representing a
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60 step in the game."
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61 [grid w h]
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62 (doseq [x (range (inc w))
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63 y (range (inc h))]
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64 (when (= y 0) (println))
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65 (print (if (grid [x y])
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66 "[X]"
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67 " . "))))
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68
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69 (defn print-grids
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70 "Prints a sequence of `grids` of `w` columns and `h` rows on *out*,
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71 representing several steps."
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72 [grids w h]
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73 (doseq [grid grids]
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74 (print-grid grid w h)
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75 (println)))
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76
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77 ;;; Launches an example grid
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78
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79 (def grid
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80 "`grid` represents the initial set of living cells"
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81 #{[2 1] [2 2] [2 3]})
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82
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83 (print-grids (take 3 (iterate step grid)) 5 5)</textarea></form>
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84 <script>
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85 var editor = CodeMirror.fromTextArea(document.getElementById("code"), {
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86 autoCloseBrackets: true,
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87 lineNumbers: true,
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88 matchBrackets: true,
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89 mode: 'text/x-clojure'
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90 });
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91 </script>
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92
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93 <p><strong>MIME types defined:</strong> <code>text/x-clojure</code>.</p>
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94
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95 </article>
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