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| <html> | |
| <body> | |
| <script> | |
| function toChar(ch) { | |
| return (ch == '' ? ' ' : ch) | |
| } | |
| function next(grid) { | |
| var ncols = 0; | |
| for (var i = 0; i < grid.length; ++i) { ncols = Math.max(ncols, grid[i].length) } | |
| var grid1 = [ "" ] | |
| grid1 = grid1.concat(grid) | |
| grid1.push("") | |
| var grid2 = [] | |
| var nrows = grid.length | |
| for (var r = 1; r <= nrows; ++r) { | |
| var row = "" | |
| for (var c = 0; c < ncols; ++c) { | |
| var ch; | |
| var nbrs = "" | |
| for (var dr = -1; dr <= 1; ++dr) { | |
| for (var dc = -1; dc <= 1; ++dc) { | |
| if (dr == 0 && dc == 0) continue; | |
| var z = toChar( grid1[r+dr].charAt(c+dc) ) | |
| if (z != ' ') { | |
| nbrs += z | |
| } | |
| } | |
| } | |
| var a = toChar( grid1[r].charAt(c) ) | |
| var ch = (a == ' ' ? ((nbrs.length == 3) | |
| ? nbrs.charAt( Math.floor( Math.random() * nbrs.length ) ) | |
| : ' ') | |
| : ((nbrs.length == 2 || nbrs.length == 3) | |
| ? a | |
| : ' ')) | |
| row += ch | |
| } | |
| grid2.push(row) | |
| } | |
| return grid2 | |
| } | |
| function nextGeneration() { | |
| var textarea = document.getElementById("thegrid") | |
| var content = textarea.value | |
| var grid = next( content.split('\n') ) | |
| var ncols = 0; | |
| for (var i = 0; i < grid.length; ++i) { ncols = Math.max(ncols, grid[i].length) } | |
| var nrows = grid.length | |
| textarea.value = grid.join("\n") | |
| } | |
| var freeRunKey; | |
| function step() { | |
| clearInterval(freeRunKey) | |
| freeRunKey = null; | |
| nextGeneration(); | |
| } | |
| function freeRun() { | |
| if (!freeRunKey) { | |
| freeRunKey = setInterval(nextGeneration, 200); | |
| } | |
| } | |
| function clearGrid() { | |
| document.getElementById("thegrid").value = "" | |
| } | |
| </script> | |
| <button type="button" onclick="clearGrid()">Clear</button> | |
| <button type="button" onclick="step()">Step</button> | |
| <button type="button" onclick="freeRun()">Run</button> | |
| <pre> | |
| <textarea id="thegrid" wrap="off" cols=80 rows=24 style="font-size:14px; font-family: monospace"> | |
| The quick brown fox | |
| jumped over the lazy | |
| dog's back. | |
| </textarea> | |
| </pre> | |
| </body> | |
| </html> |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <html> | |
| <body> | |
| <script> | |
| var grid = " He\nll\n o\n".split("\n") | |
| function toChar(ch) { | |
| return (ch == '' ? ' ' : ch) | |
| } | |
| function trim(grid) { | |
| // trim leading spaces | |
| var m = 1024 | |
| for (var i = 0; i < grid.length; ++i) { | |
| m = Math.min(m, (/^ */.exec(grid[i]))[0].length ) | |
| } | |
| if (m > 0) { | |
| for (var i = 0; i < grid.length; ++i) { | |
| grid[i] = grid[i].slice(m) | |
| } | |
| } | |
| var r0; | |
| for (r0 = 0; r0 < grid.length; ++r0) { if (/[^ ]/.test(grid[r0])) break } | |
| var r1 = grid.length-1; | |
| for (r1 = grid.length-1; r1 >= 0; --r1) { if (/[^ ]/.test(grid[r1])) break } | |
| grid = grid.slice(r0,r1+1) | |
| // trim trailing spaces | |
| for (var i = 0; i < grid.length; ++i) { | |
| grid[i] = grid[i].replace(/ +$/,'') | |
| } | |
| return grid; | |
| } | |
| function next(grid) { | |
| // return the next generation | |
| grid = trim(grid) | |
| var ncols = 0; | |
| for (var i = 0; i < grid.length; ++i) { ncols = Math.max(ncols, grid[i].length) } | |
| var grid1 = [ "", "" ] | |
| for (var i = 0; i < grid.length; ++i) { | |
| grid1.push(" " + grid[i]) | |
| } | |
| grid1.push(" ") | |
| grid1.push(" ") | |
| var grid2 = [] | |
| var nrows = 2+grid.length | |
| for (var r = 1; r <= nrows; ++r) { | |
| var row = "" | |
| for (var c = 1; c <= ncols+2; ++c) { | |
| var ch; | |
| var nbrs = "" | |
| for (var dr = -1; dr <= 1; ++dr) { | |
| for (var dc = -1; dc <= 1; ++dc) { | |
| if (dr == 0 && dc == 0) continue; | |
| var z = toChar( grid1[r+dr].charAt(c+dc) ) | |
| if (z != ' ') { | |
| nbrs += z | |
| } | |
| } | |
| } | |
| var a = toChar( grid1[r].charAt(c) ) | |
| if (a != ' ') { // alive | |
| if (nbrs.length == 2 || nbrs.length == 3) { | |
| ch = grid1[r].charAt(c) | |
| } else { | |
| ch = ' ' | |
| } | |
| } else { | |
| if (nbrs.length == 3) { | |
| ch = nbrs.charAt( Math.floor( Math.random() * nbrs.length ) ) | |
| } else { | |
| ch = ' ' | |
| } | |
| } | |
| row += ch | |
| } | |
| grid2.push(row) | |
| } | |
| return grid2 | |
| } | |
| function nextGeneration() { | |
| var textarea = document.getElementById("thegrid") | |
| var content = textarea.value | |
| var grid = next( content.split('\n') ) | |
| var ncols = 0; | |
| for (var i = 0; i < grid.length; ++i) { ncols = Math.max(ncols, grid[i].length) } | |
| var nrows = grid.length | |
| textarea.value = grid.join("\n") | |
| } | |
| var freeRunKey; | |
| function step() { | |
| clearInterval(freeRunKey) | |
| nextGeneration(); | |
| } | |
| function freeRun() { | |
| freeRunKey = setInterval(nextGeneration, 200); | |
| } | |
| </script> | |
| <button type="button" onclick="step()">Step</button> | |
| <button type="button" onclick="freeRun()">Run</button> | |
| <pre> | |
| <textarea id="thegrid" wrap="off" cols=40 rows=20 style="font-size:14px; font-family: monospace"> | |
| The quick brown fox | |
| jumped over the lazy | |
| dog's back. | |
| </textarea> | |
| </pre> | |
| </body> | |
| </html> |
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