auser · July 5, 2013 08:19
diff --git a/nQueens.html b/nQueens.html
 <!doctype html>
 <html ng-app>
  <head>
    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.0.7/angular.min.js"></script>
  </head>
  <body>
    <div ng-controller="nQueensController">
      <label>Number:</label>
      <input type="number" ng-model="n" placeholder="Enter a number">
      <ul>
        <li ng-repeat="s in solutions">
          Solutions for: {{ s.n }} queens: {{ s.count }} 
        </li>
      </ul>
    </div>
  </body>
 </html>

 <script type="text/javascript">
 function nQueensController($scope) {
  $scope.n = 2;
  $scope.solutions = [];
  
  var solve = function() {
    $scope.solutions = [];
    var n = $scope.n;
        
    for (i = 0; i < n; i++) {
      var obj = {n: i, count: 0},
          mask = (1 << i) - 1;
    
      var solveF = function(columns, leftDiag, rightDiag) {
        var poss    = ~(columns|leftDiag|rightDiag) & mask;
        while (poss > 0) {
          var bit = -poss & poss; // valid position
          c = columns | bit;
          poss = poss ^ bit;
          ol = (leftDiag | bit) << 1;
          or = (rightDiag | bit) >> 1;
          solveF(c,ol,or);
        }
        if (columns === mask){
          obj.count += 1;
        }
      }
      solveF(0,0,0);
      $scope.solutions.push(obj);
    }
  }
  
  $scope.$watch('n', solve);
 }
 </script>
	<!doctype html>
	<html ng-app>
	<head>
	<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.0.7/angular.min.js"></script>
	</head>
	<body>
	<div ng-controller="nQueensController">
	<label>Number:</label>
	<input type="number" ng-model="n" placeholder="Enter a number">
	<ul>
	<li ng-repeat="s in solutions">
	Solutions for: {{ s.n }} queens: {{ s.count }}
	</li>
	</ul>
	</div>
	</body>
	</html>

	<script type="text/javascript">
	function nQueensController($scope) {
	$scope.n = 2;
	$scope.solutions = [];

	var solve = function() {
	$scope.solutions = [];
	var n = $scope.n;

	for (i = 0; i < n; i++) {
	var obj = {n: i, count: 0},
	mask = (1 << i) - 1;

	var solveF = function(columns, leftDiag, rightDiag) {
	var poss = ~(columns\|leftDiag\|rightDiag) & mask;
	while (poss > 0) {
	var bit = -poss & poss; // valid position
	c = columns \| bit;
	poss = poss ^ bit;
	ol = (leftDiag \| bit) << 1;
	or = (rightDiag \| bit) >> 1;
	solveF(c,ol,or);
	}
	if (columns === mask){
	obj.count += 1;
	}
	}
	solveF(0,0,0);
	$scope.solutions.push(obj);
	}
	}

	$scope.$watch('n', solve);
	}
	</script>