myApp.js

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

myApp.controller("contactsController", function($scope, contactsFactory){
	$scope.contacts = contactsFactory.getContacts();

	$scope.add = function(newContact){
		contactsFactory.add(newContact);
		$scope.newContact = contactsFactory.cleanContact();
		$scope.contacts = contactsFactory.getContacts();
	}
});

myApp.factory("contactsFactory", function(){
	var contacts = [];
	return {
		add: contacts.push.bind(contacts),
		getContacts: function() { return contacts; },
		cleanContact: function() { return { name: "", email: "" }; }}
	};
});