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r4026 | <!doctype html> | |||
<html> | ||||
<head> | ||||
<meta charset="utf-8"> | ||||
<title>CodeMirror: Clojure mode</title> | ||||
<link rel="stylesheet" href="../../lib/codemirror.css"> | ||||
<script src="../../lib/codemirror.js"></script> | ||||
<script src="clojure.js"></script> | ||||
<style>.CodeMirror {background: #f8f8f8;}</style> | ||||
<link rel="stylesheet" href="../../doc/docs.css"> | ||||
</head> | ||||
<body> | ||||
<h1>CodeMirror: Clojure mode</h1> | ||||
<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) | ||||
</textarea></form> | ||||
<script> | ||||
var editor = CodeMirror.fromTextArea(document.getElementById("code"), {}); | ||||
</script> | ||||
<p><strong>MIME types defined:</strong> <code>text/x-clojure</code>.</p> | ||||
</body> | ||||
</html> | ||||