Could someone kindly shed some light on the distinction between angular.merge and angular.extend? Additionally, can you explain what a deep copy is and in what situations it should be utilized?
Could someone kindly shed some light on the distinction between angular.merge and angular.extend? Additionally, can you explain what a deep copy is and in what situations it should be utilized?
Duplicate: to replicate the properties of the source objects from right to left, completely transferring them to the destination object.
Illustration: duplicate person and job objects back and forth.
//------------------------------Duplicate----------------------------
$scope.duplicatePersonToJob = function () {
var person = { 'Name': 'Monica', 'Age': '25', 'Skills': { 'name': 'travelling', 'place': 'Queenstown' } };
var job = { 'Title': 'Programmer', 'Experience': '5', 'Skills': { 'name': 'Designing', 'experience': '2', 'certified': 'true' } };
// duplicate from Person to Job
$scope.personTojob = angular.duplicate(person, job);
// output : { 'Name': 'Monica', 'Age': '25', 'Skills': { 'name': 'Designing', 'experience': '2', 'certified': 'true' } , 'Title': 'Programmer', 'Experience': '5'}
}
$scope.duplicateJobToPerson = function () {
var person = { 'Name': 'Monica', 'Age': '25', 'Skills': { 'name': 'travelling', 'place': 'Queenstown' } };
var job = { 'Title': 'Programmer', 'Experience': '5', 'Skills': { 'name': 'Designing', 'experience': '2', 'certified': 'true' } };
// duplicate from job to person
$scope.jobToperson = angular.duplicate(job, person)
// output : { 'Name': 'Monica', 'Age': '25', 'Skills': { 'name': 'travelling' , 'place': 'Queenstown' } , 'Title': 'Programmer', 'Experience': '5'}
}
Blend is to thoroughly (recursively) incorporate the properties of the source objects into the destination object.
Example: blend person and job objects interchangeably.
//------------------------------------Blend------------------------------
$scope.blendPersonToJob = function () {
var person = { 'Name': 'Monica', 'Age': '25', 'Skills': { 'name': 'travelling', 'place': 'Queenstown' } };
var job = { 'Title': 'Programmer', 'Experience': '5', 'Skills': { 'name': 'Designing', 'experience': '2', 'certified': 'true' } };
// blend from Person to Job
$scope.personTojob = angular.blend(person, job);
// output : { 'Name': 'Monica', 'Age': '25', 'Skills': { 'name': 'Designing', 'experience': '2', 'certified': 'true', 'place': 'Queenstown' }, 'Title': 'Programmer', 'Experience': '5' };
}
$scope.blendJobToPerson = function () {
var person = { 'Name': 'Monica', 'Age': '25', 'Skills': { 'name': 'travelling', 'place': 'Queenstown' } };
var job = { 'Title': 'Programmer', 'Experience': '5', 'Skills': { 'name': 'Designing', 'experience': '2', 'certified': 'true' } };
// blend from job to person
$scope.jobToperson = angular.blend(job, person)
// output : { 'Name': 'Monica', 'Age': '25', 'Skills': { 'name': 'travelling', 'experience': '2', 'certified': 'true', 'place': 'Queenstown' }, 'Title': 'Programmer', 'Experience': '5' };
}
Check out this Demo for a better understanding. Feel free to correct me if I'm mistaken.
Reference: David Cai's Blog
This information is sourced from the Angular documentation.
With merge(), it goes beyond extend() by delving into the properties of source objects and executing a thorough copy process.
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