Chapter 10: Safe deep property reference using $parse
by msfrisbie
HTML
<script src="https://code.angularjs.org/1.3.2/angular.min.js"></script>
<div ng-app="myApp">
<div ng-controller="Ctrl"></div>
</div>
JavaScript
angular.module('myApp', [])
.controller('Ctrl', function($log, $scope, $parse) {
$scope.$watch('user', function(newUserVal) {
$log.log($parse('address.city')(newUserVal));
});
});