reidblomquist/index.html

## index.html
<!doctype html>

<html lang="en">
<head>
  <meta charset="utf-8">

  <title>Faddah's Life</title>
  <meta name="description" content="Faddah's Life">
  <meta name="author" content="Faddah">

  <script src="https://rawgit.com/faddah/d5f83736df51f07ff6a9/raw/5a764d3041ceada28bc4dac9f8bbfb0e959d6943/life.js"></script>
  <!--[if lt IE 9]>
  <script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script>
  <![endif]-->
</head>

<body>
</body>
</html>

## life.js
(function() {

  var _ = self.Life = function(seed) {
    this.seed = seed;
    this.height = seed.length;
    this.width = seed[0].length;

    this.prevBoard = [];
    this.board = cloneArray(seed);
  };

  _.prototype = {
    next: function() {
      this.prevBoard = cloneArray(this.board);

      for(var y = 0; y < this.height; y++) {
        for(var x = 0; x < this.width; x++) {
          var neighbors = this.aliveNeighbors(this.prevBoard, x, y);
          // console.log("y is: " + y, "x is: " + x, ": " + neighbors);
          var alive = !!this.board[y][x];

          if(alive) {
            if(neighbors < 2 || neighbors > 3) {
              this.board[y][x] = 0;
            }
          }
          else {
            if(neighbors === 3) {
              this.board[y][x] = 1;
            }
          }

          }
        }
    },

    aliveNeighbors: function(array, x, y) {
      var prevRow = array[y - 1] || [];
      var nextRow = array[y + 1] || [];

      var neighbors = [
        prevRow[x - 1], prevRow[x], prevRow[x + 1],
        array[y][x - 1], array[y][x + 1],
        nextRow[x - 1], nextRow[x], nextRow[x + 1]
      ].reduce(function(prev, cur) {
          return prev + +!!cur;
      }, 0);

    },

    toString: function() {
      return this.board.map(function(row) { return row.join(' ') }).join('\n');
    }
  };
  // Helpers
  // Warning: only clones 2D arrays
  function cloneArray(array) {
    return array.slice().map(function(row) { return row.slice(); });
  }
})();

var game = new Life([
  [0, 0, 0, 0, 0],
  [0, 0, 1, 0, 0],
  [0, 0, 1, 0, 0],
  [0, 0, 1, 0, 0],
  [0, 0, 0, 0, 0]
]);

console.log(game + '');

game.next();

console.log(game + '');

game.next();

console.log(game + '');
	<!doctype html>

	<html lang="en">
	<head>
	<meta charset="utf-8">

	<title>Faddah's Life</title>
	<meta name="description" content="Faddah's Life">
	<meta name="author" content="Faddah">

	<script src="https://rawgit.com/faddah/d5f83736df51f07ff6a9/raw/5a764d3041ceada28bc4dac9f8bbfb0e959d6943/life.js"></script>
	<!--[if lt IE 9]>
	<script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script>
	<![endif]-->
	</head>

	<body>
	</body>
	</html>
	(function() {

	var _ = self.Life = function(seed) {
	this.seed = seed;
	this.height = seed.length;
	this.width = seed[0].length;

	this.prevBoard = [];
	this.board = cloneArray(seed);
	};

	_.prototype = {
	next: function() {
	this.prevBoard = cloneArray(this.board);

	for(var y = 0; y < this.height; y++) {
	for(var x = 0; x < this.width; x++) {
	var neighbors = this.aliveNeighbors(this.prevBoard, x, y);
	// console.log("y is: " + y, "x is: " + x, ": " + neighbors);
	var alive = !!this.board[y][x];

	if(alive) {
	if(neighbors < 2 \|\| neighbors > 3) {
	this.board[y][x] = 0;
	}
	}
	else {
	if(neighbors === 3) {
	this.board[y][x] = 1;
	}
	}

	}
	}
	},

	aliveNeighbors: function(array, x, y) {
	var prevRow = array[y - 1] \|\| [];
	var nextRow = array[y + 1] \|\| [];

	var neighbors = [
	prevRow[x - 1], prevRow[x], prevRow[x + 1],
	array[y][x - 1], array[y][x + 1],
	nextRow[x - 1], nextRow[x], nextRow[x + 1]
	].reduce(function(prev, cur) {
	return prev + +!!cur;
	}, 0);

	},

	toString: function() {
	return this.board.map(function(row) { return row.join(' ') }).join('\n');
	}
	};
	// Helpers
	// Warning: only clones 2D arrays
	function cloneArray(array) {
	return array.slice().map(function(row) { return row.slice(); });
	}
	})();

	var game = new Life([
	[0, 0, 0, 0, 0],
	[0, 0, 1, 0, 0],
	[0, 0, 1, 0, 0],
	[0, 0, 1, 0, 0],
	[0, 0, 0, 0, 0]
	]);

	console.log(game + '');

	game.next();

	console.log(game + '');

	game.next();

	console.log(game + '');