mirror of https://github.com/coolaj86/fizzbuzz.git
added hotplate2
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commit
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/*
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* The hotplat could be represented (6x6) as
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*
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* 0 * * * * 0
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* * * * * * *
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* * * 1 1 * *
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* * * 1 1 * *
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* * * * * * *
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* 0 * * * * 0
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*
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*/
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(function () {
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"use strict";
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var red = '\u001b[31m'
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, yellow = '\u001b[33m'
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, blue = '\u001b[34m'
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, reset = '\u001b[0m'
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;
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function pad(num) {
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num = String(num);
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while (num.length < 6) {
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num = ' ' + num;
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}
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return num;
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}
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/*
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* rows: number of rows
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* cols: number of columns
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* diff: maximum allowable difference
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* initial: the start value of each cell
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* turns: maximum number of turns
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*/
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function HotPlate(opts) {
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var me = this
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;
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me.numrows = opts.rows;
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me.numcols = opts.cols;
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me.prevRows = [];
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me.nextRows = [];
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me.maxDiff = opts.diff || 0.00001;
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me.maxTurns = opts.turns || 100 * 1000;
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me.initializeGrid(me.prevRows);
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me.initializeGrid(me.nextRows);
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//console.log(me.prevRows);
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//console.log(me.nextRows);
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}
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HotPlate.prototype.initializeGrid = function (rows) {
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var me = this
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, row
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, i
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, j
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;
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for (i = 0; i < me.numrows; i += 1) {
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row = [];
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rows.push(row);
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for (j = 0; j < me.numcols; j += 1) {
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row.push(me.initial || 0);
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}
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}
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// 0, 1, 2, [3, 4], 5, 6, 7
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rows[(me.numrows / 2) - 1][(me.numcols / 2) - 1] = 100;
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rows[(me.numrows / 2) - 1][(me.numcols / 2)] = 100;
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rows[(me.numrows / 2)][(me.numcols / 2) - 1] = 100;
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rows[(me.numrows / 2)][(me.numcols / 2)] = 100;
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};
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HotPlate.prototype.run = function () {
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var me = this
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, diff = 100
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, sum
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, count
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, i
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, j
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, rows
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, turns = 0
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, str
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, color
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;
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while (diff > me.maxDiff && turns < me.maxTurns) {
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turns += 1;
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diff = 0;
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for (i = 0; i < me.numrows; i += 1) {
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for (j = 0; j < me.numcols; j += 1) {
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// ignore the cold cells (cornermost)
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if (
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(i === 0 && j === 0)
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|| (i === 0 && j === me.numcols - 1)
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|| (i === me.numrows - 1 && j === 0)
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|| (i === me.numrows - 1 && j === me.numcols - 1)
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) {
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continue;
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}
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// ignore hot cells (centermost)
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if (
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(i === (me.numrows / 2) - 1 && j === (me.numcols / 2) - 1)
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|| (i === (me.numrows / 2) - 1 && j === (me.numcols / 2))
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|| (i === (me.numrows / 2) && j === (me.numcols / 2) - 1)
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|| (i === (me.numrows / 2) && j === (me.numcols / 2))
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) {
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continue;
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}
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// add up, left, right, down and self values
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// (but only if they exist)
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rows = me.prevRows;
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//console.log(rows);
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sum = 0;
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count = 0;
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if (i > 0) {
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count += 1;
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sum += rows[i - 1][j];
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//console.log('i>0:', rows[i - 1] + rows[j]);
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}
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if (i < me.numrows - 1) {
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count += 1;
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sum += rows[i + 1][j];
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//console.log('i<last:', rows[i + 1] + rows[j]);
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}
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if (j > 0) {
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count += 1;
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sum += rows[i][j - 1];
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//console.log('j>0:', rows[i] + rows[j - 1]);
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}
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if (j < me.numcols - 1) {
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count += 1;
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sum += rows[i][j + 1];
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//console.log('j<last:', rows[i] + rows[j + 1]);
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}
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/*
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console.log(
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'i:' + i
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, 'j:' + j
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, 'i,j:' + me.nextRows[i][j]
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, 'sum:' + sum
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, 'count:' + count
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, 'avg:' + sum / count
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);
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*/
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me.nextRows[i][j] = sum / count;
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diff = Math.max(diff, Math.abs(me.nextRows[i][j] - me.prevRows[i][j]));
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}
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}
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me.prevRows = me.nextRows;
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me.nextRows = [];
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me.initializeGrid(me.nextRows);
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}
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console.log('Grid:', me.numrows + 'x' + me.numcols);
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console.log('Turns:', turns);
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console.log('Diff:', me.maxDiff);
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for (i = 0; i < me.numrows; i += 1) {
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str = '';
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for (j = 0; j < me.numcols; j += 1) {
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if (me.prevRows[i][j] < 33) {
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color = blue;
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} else if (me.prevRows[i][j] > 66) {
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color = red;
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} else {
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color = yellow;
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}
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str += ' ' + color + pad((me.prevRows[i][j]).toFixed(2));
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}
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console.log(str);
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}
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console.log(reset + 'Actual Diff:', diff);
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};
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HotPlate.create = function (opts) {
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return new HotPlate(opts);
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};
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HotPlate.create({ cols: 8, rows: 16}).run();
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}());
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