What is the best way to extract fields from one object and merge them into another object using Javascript?

Here is the scenario:

$scope.book1 = {
  a = 1,
  b = 2
}

This is the information retrieved from the database:

$scope.book2 = {
  title = 2,
  author = 'joe'
}

What steps should I take to merge the data in book2 into book1, ensuring that all four fields are included?

I would like to note that our users primarily use IE9 and above. If feasible, I am interested in using lodash for this task; however, I need the updated data to be reflected in the original book1 object instead of creating a new one.

Answer №1

In case you are looking to create your own extend function

Object.prototype.extend = function(obj) {
    for(key in obj)
        this[key] = obj[key];
};

$scope.book1.extend($scope.book2);

If you are working with angularjs, you might want to check out http://docs.angularjs.org/api/angular.extend

Answer №2

Combining the properties of $scope.book1 and $scope.book2 using the angular.extend function.

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