angular一些常用的方法：

angular.copy();

用法：对Object对象的深度拷贝
$scope.data = {name:'yanjinyun',age:'11'};

$scope.origData = angular.copy($scope.data);

angular.fromJson()

var json = '{"name":"liSi", "password":"321"}';
var jsonArr = '[{"name":"zhangSan", "password":"123"},{"name":"liSi", "password":"321"}]';

var obj = angular.fromJson(json);
console.log(obj);

var objArr = angular.fromJson(jsonArr);
console.log(objArr[0].name);
console.log(objArr[1].password);