javascript - What is the difference between angular.copy() and an assignment (=)?

Question

I want to assign some values when a button click event happens via event parameter:

$scope.update = function(context) {
    $scope.master = context;
};

I have assigned user values to $scope.master.

Now i am seeing angular.copy(). So I wrote the code with angular.copy.

$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(=).

Answer 1

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.

Thus in the latter case, if you we're to change something in $scope.master you would also change context.

Cheers,