CODEWITHSUNDEEP
javascriptangularjsangularjs-directiveangularjs-scopeangularjs-service
Ruchir Gupta
Ruchir Gupta

Reputation: 1000

angularjs - copy common properties from one object to another

I have a controller like this:

CheckoutController = function() {
    $scope.Profile = {
        firstname : 'Ruchir',
        middlename : 'Shakun',
        lastname : 'Gupta',
        email : '[email protected]',
        cellphone : '9876543210'
    }

    $scope.BillingDetails = {
        firstname : undefined,
        middlename : undefined,
        lastname : undefined,
        addressline : undefined,
        city : undefined,
        zipcode : undefined
    }

    $scope.update = function() {
        // I want to write some awesome code here as explained below
    }
}

Now, in the $scope.update function; I want to write something that should copy 'only common properties' i.e. firstname, middlename, and lastname from $scope.Profile to $scope.BillingDetails.

I tried angular.copy and angular.extend but,

What I want my update function to do is it should make $scope.BillingDetails equal to below object:

{
    firstname : 'Ruchir',
    middlename : 'Shakun',
    lastname : 'Gupta',
    addressline : undefined,
    city : undefined,
    zipcode : undefined    
}

This scenario is just an example. To shorten the length of my question, I have mentioned 5-6 properties only. In fact, I have to deal with more than 20 properties and all are dynamic. So it won't work for me by copying one-by-one properties firstname, middlename and lastname from Profile to BillingDetails. What can I do?

Upvotes: 8

Views: 19683

Answers (3)

JcT
JcT

Reputation: 3569

You may have luck with something like this:

$scope.update = function() {
  _update($scope.Profile, $scope.BillingDetails);
}

function _update(srcObj, destObj) {
  for (var key in destObj) {
    if(destObj.hasOwnProperty(key) && srcObj.hasOwnProperty(key)) {
      destObj[key] = srcObj[key];
    }
  }
}

plunker

Upvotes: 14

Cerbrus
Cerbrus

Reputation: 72857

Simple. Just assign them like this:

$scope.update = function() {
    $scope.BillingDetails.firstname = $scope.Profile.firstname;
    $scope.BillingDetails.middlename = $scope.Profile.middlename;
    $scope.BillingDetails.lastname = $scope.Profile.lastname;
}

I really can't think of a more straightforward method of copying a couple of properties from one object to another.

Since you need to copy more than 3 properties, you could try this:

$scope.update = function() {
    // Add the properties you want to copy to this array.
    var properties = ['firstname', 'middlename', 'lastname'];
    for(var i = 0; i < properties.length; i++){
         $scope.BillingDetails[properties[i]] = $scope.Profile[properties[i]];
    }
}

Or, pass the array as a parameter:

$scope.update = function(properties) {
    for(var i = 0; i < properties.length; i++){
         $scope.BillingDetails[properties[i]] = $scope.Profile[properties[i]];
    }
}

$scope.update(['firstname', 'middlename', 'lastname']);

Upvotes: 4

Tip-Sy
Tip-Sy

Reputation: 808

In fact, you try to update BillingDetails with values of Profile, for properties they both have in common right?

If you can change the default values of BillingDetails with null instead of undefined, you can try this code:

$scope.BillingDetails = {
    firstname : null,
    middlename : null,
    lastname : null,
    addressline : null,
    city : null,
    zipcode : null
}

$scope.update = function() {
    for(var key in $scope.Profile) {
        if(typeof $scope.BillingDetails[key] !== 'undefined') {
            $scope.BillingDetails[key] = $scope.Profile[key];
        }
    }
}

Upvotes: 3

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