angular.bind

<!DOCTYPE html>
<html lang="en">
<head>
 <script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.2.13/angular.min.js"></script>
 <script>
var myApp = angular.module("myApp", []);
 myApp.controller("myController", function($scope) {

 function add(a, b) {
           return parseInt(a)+parseInt(b);
        }
        $scope.getResult = function () {
            var result = angular.bind(this, add);
            $scope.result = result($scope.input1, $scope.input2);
        }
});
</script>
</head>
<body>  
<div ng-app="myApp">  
<div ng-controller="myController"> 
 
 Enter a number 1.
 <input type="text" name="addExample1" ng-model="input1"><br>
 Enter a number 2
 <input type="text" name="addExample2" ng-keyup="getResult()" ng-model="input2">
 <br>number 1 + number 2 = {{result}}<br>

</div> 
</div>
</body>  
</html>