I want to assign some values when a button click event happens via event parameter:
当按钮点击事件通过事件参数发生时，我想分配一些值:
$scope.update = function(context) {
$scope.master = context;
};
I have assigned user values to $scope.master.
我给$scope.master分配了用户值。
Now i am seeing angular.copy(). So I wrote the code with angular.copy.
现在我看到了angular.copy()。我用angular。copy编写代码。
$scope.update = function(context) {
$scope.master = angular.copy(context)
};
Both are doing same, so what is the difference? Please tell me about the difference between angular.copy() and equal(=).
两者都是一样的，有什么区别呢?请告诉我angular.copy()和equal(=)之间的区别。
4 个解决方案
#1
47
As can be read here angular.copy() performs a deep copy (cf. "clone") of the argument - essentially creating a new object - whereas using the assignment operator = just assigns reference's.
可以在这里读到angular.copy()执行一个深层复制(cf)。“克隆”)的参数——本质上是创建一个新对象——而使用赋值运算符=仅分配引用。
Thus in the latter case, if you we're to change something in $scope.master you would also change context.
因此在后一种情况下，如果我们要改变$作用域。掌握你也会改变环境。
Cheers,
欢呼,
#2
10
= represents a reference whereas angular.copy() creates a new object as a deep copy.
=表示一个引用，而angular.copy()则创建一个新对象作为深度副本。
Using = would mean that changing a property of contextwould change the corresponding property of $scope.master or vice versa.
使用=意味着改变contexta的属性将改变$scope的相应属性。主,反之亦然。
Using angular.copy() the two objects would remain seperate and changes would not reflect on each other.
使用angular.copy()这两个对象将保持分离，并且更改不会相互反映。
#3
3
When you manipulate primitive types (like int) in Javascript, = and angular.copy are the same as any assignment results in copying the value of the variable.
当您在Javascript中操作原始类型(如int)时，=和角度。复制与任何赋值相同，结果是复制变量的值。
When you manipulate objects in Javascript, = assign a reference to the existing object to the variable and angular.copy is copying, that means creating a new object with the same properties and values and assigning the new object's reference to the variable.
当您在Javascript中操作对象时，=将对现有对象的引用赋给变量和角度。复制是复制，这意味着创建具有相同属性和值的新对象，并将新对象的引用分配给变量。
#4
2
Simply
简单的
angular.copy() is same as .clone() of jquery which create & returns same object copy with dept. (call by value)
copy()与jquery的.clone()相同，后者创建并返回与dept.(按值调用)相同的对象拷贝。
= it does assign the value with its reference value(call by reference),
=它确实用它的引用值(按引用调用)赋值，
a = b in this a will be b value is assigned to a, but if both a & b are array then changes in a will reflect in b & vice versa.
这里a = b的值将被赋给a，但如果a和b都是数组，那么a中的变化将反映在b中，反之亦然。
#1
47
As can be read here angular.copy() performs a deep copy (cf. "clone") of the argument - essentially creating a new object - whereas using the assignment operator = just assigns reference's.
可以在这里读到angular.copy()执行一个深层复制(cf)。“克隆”)的参数——本质上是创建一个新对象——而使用赋值运算符=仅分配引用。
Thus in the latter case, if you we're to change something in $scope.master you would also change context.
因此在后一种情况下，如果我们要改变$作用域。掌握你也会改变环境。
Cheers,
欢呼,
#2
10
= represents a reference whereas angular.copy() creates a new object as a deep copy.
=表示一个引用，而angular.copy()则创建一个新对象作为深度副本。
Using = would mean that changing a property of contextwould change the corresponding property of $scope.master or vice versa.
使用=意味着改变contexta的属性将改变$scope的相应属性。主,反之亦然。
Using angular.copy() the two objects would remain seperate and changes would not reflect on each other.
使用angular.copy()这两个对象将保持分离，并且更改不会相互反映。
#3
3
When you manipulate primitive types (like int) in Javascript, = and angular.copy are the same as any assignment results in copying the value of the variable.
当您在Javascript中操作原始类型(如int)时，=和角度。复制与任何赋值相同，结果是复制变量的值。
When you manipulate objects in Javascript, = assign a reference to the existing object to the variable and angular.copy is copying, that means creating a new object with the same properties and values and assigning the new object's reference to the variable.
当您在Javascript中操作对象时，=将对现有对象的引用赋给变量和角度。复制是复制，这意味着创建具有相同属性和值的新对象，并将新对象的引用分配给变量。
#4
2
Simply
简单的
angular.copy() is same as .clone() of jquery which create & returns same object copy with dept. (call by value)
copy()与jquery的.clone()相同，后者创建并返回与dept.(按值调用)相同的对象拷贝。
= it does assign the value with its reference value(call by reference),
=它确实用它的引用值(按引用调用)赋值，
a = b in this a will be b value is assigned to a, but if both a & b are array then changes in a will reflect in b & vice versa.
这里a = b的值将被赋给a，但如果a和b都是数组，那么a中的变化将反映在b中，反之亦然。