Angular: filter example 1

http://angularjs.org/

HTML

<script src="http://code.angularjs.org/angular-1.0.1.js"></script>
<div ng-controller="MyCtrl">
     {{aString | phoneToNum}}
</div>

JavaScript

var myApp = angular.module('myApp',[]);

myApp.filter('phoneToNum', function() {
    return function(input, scope) {
        return input.replace(/\D/g, "");
    }
});

function MyCtrl($scope) {
    $scope.aString = "(99)999-9999";
}