Anonymous user
Elementary cellular automaton: Difference between revisions
→{{header|Javascript}}
Line 1,631:
}</lang>
[[File:ca java.png|900px]]
=={{header|JavaScript}}==
<lang javascript>const alive = '#';
const dead = '.';
// ------------------------------------------------------------[ Bit banging ]--
const setBitAt = (val, idx) => BigInt(val) | (1n << BigInt(idx));
const clearBitAt = (val, idx) => BigInt(val) & ~(1n << BigInt(idx));
const getBitAt = val => idx => (BigInt(val) >> BigInt(idx)) & 1n;
const hasBitAt = val => idx => ((BigInt(val) >> BigInt(idx)) & 1n) === 1n;
// ----------------------------------------------------------------[ Utility ]--
const byteSlot = n => Array(n).fill(0);
const reverse = x => Array.from(x).reduce((p, c) => [c, ...p], []);
const numToLine = width => int => {
const test = hasBitAt(int);
const looper = byteSlot(width);
return reverse(looper.map((_, i) => test(i) ? alive : dead )).join('');
}
// -------------------------------------------------------------------[ Main ]--
const displayCA = (rule, width, lines, startIndex) => {
const result = [];
const ruleTest = hasBitAt(rule);
const lineLoop = byteSlot(lines);
const looper = byteSlot(width);
const pLine = numToLine(width);
let nTarget = setBitAt(0n, startIndex);
result.push(pLine(nTarget));
lineLoop.forEach(() => {
const bitTest = getBitAt(nTarget);
looper.forEach((e, i) => {
const l = bitTest(i === 0 ? width - 1 : i - 1);
const m = bitTest(i);
const r = bitTest(i === width - 1 ? 0 : i + 1);
nTarget = ruleTest(
parseInt([l,m,r].join(''), 2))
? setBitAt(nTarget, i)
: clearBitAt(nTarget, i);
});
result.push(pLine(nTarget));
});
return result.join('\n');
}
displayCA(90, 57, 64, 28);</lang>
{{out}}
<pre>
............................#............................
...........................#.#...........................
..........................#...#..........................
.........................#.#.#.#.........................
........................#.......#........................
.......................#.#.....#.#.......................
......................#...#...#...#......................
.....................#.#.#.#.#.#.#.#.....................
....................#...............#....................
...................#.#.............#.#...................
..................#...#...........#...#..................
.................#.#.#.#.........#.#.#.#.................
................#.......#.......#.......#................
...............#.#.....#.#.....#.#.....#.#...............
..............#...#...#...#...#...#...#...#..............
.............#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.............
............#...............................#............
...........#.#.............................#.#...........
..........#...#...........................#...#..........
.........#.#.#.#.........................#.#.#.#.........
........#.......#.......................#.......#........
.......#.#.....#.#.....................#.#.....#.#.......
......#...#...#...#...................#...#...#...#......
.....#.#.#.#.#.#.#.#.................#.#.#.#.#.#.#.#.....
....#...............#...............#...............#....
...#.#.............#.#.............#.#.............#.#...
..#...#...........#...#...........#...#...........#...#..
.#.#.#.#.........#.#.#.#.........#.#.#.#.........#.#.#.#.
#.......#.......#.......#.......#.......#.......#.......#
##.....#.#.....#.#.....#.#.....#.#.....#.#.....#.#.....##
.##...#...#...#...#...#...#...#...#...#...#...#...#...##.
####.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.####
...#.................................................#...
..#.#...............................................#.#..
.#...#.............................................#...#.
#.#.#.#...........................................#.#.#.#
#......#.........................................#......#
##....#.#.......................................#.#....##
.##..#...#.....................................#...#..##.
#####.#.#.#...................................#.#.#.#####
....#......#.................................#......#....
...#.#....#.#...............................#.#....#.#...
..#...#..#...#.............................#...#..#...#..
.#.#.#.##.#.#.#...........................#.#.#.##.#.#.#.
#......##......#.........................#......##......#
##....####....#.#.......................#.#....####....##
.##..##..##..#...#.....................#...#..##..##..##.
#############.#.#.#...................#.#.#.#############
............#......#.................#......#............
...........#.#....#.#...............#.#....#.#...........
..........#...#..#...#.............#...#..#...#..........
.........#.#.#.##.#.#.#...........#.#.#.##.#.#.#.........
........#......##......#.........#......##......#........
.......#.#....####....#.#.......#.#....####....#.#.......
......#...#..##..##..#...#.....#...#..##..##..#...#......
.....#.#.#.##########.#.#.#...#.#.#.##########.#.#.#.....
....#......#........#......#.#......#........#......#....
...#.#....#.#......#.#....#...#....#.#......#.#....#.#...
..#...#..#...#....#...#..#.#.#.#..#...#....#...#..#...#..
.#.#.#.##.#.#.#..#.#.#.##.......##.#.#.#..#.#.#.##.#.#.#.
#......##......##......###.....###......##......##......#
##....####....####....##.##...##.##....####....####....##
.##..##..##..##..##..###.###.###.###..##..##..##..##..##.
######################.#.#.#.#.#.#.######################
.....................#.............#.....................
</pre>
=={{header|jq}}==
| |||