如何获得angularjs中更改的对象？

$scope.$watch('Data',function (newVal) { /*...*/ },true);

如何获取一个已更改属性的对象,以便我可以将其推送到数组中？
例如：

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

myApp.factory("Data",function(){
var Data = [{id:1,property: "Random"},{id:2,property: "Random again"}];
return Data;
});

var myBigArray = [];

function tableCtrl($scope,Data){
    $scope.TheData = Data;
    $scope.$watch("TheData",function() {

    //Here an object should be pushed
    myBigArray.push(">>Object in which property has been changed <<<");
    },true);
}