JAVASCRIPT

mdn object assign

The Object.assign() method copies all enumerable own properties from one or more source objects to a target object. It returns the target object.
const target = { a: 1, b: 2 };
const source = { b: 4, c: 5 };

const returnedTarget = Object.assign(target, source);

console.log(target);
// expected output: Object { a: 1, b: 4, c: 5 }

console.log(returnedTarget);
// expected output: Object { a: 1, b: 4, c: 5 }

object assign js

const user = { name: 'user', password: 'user'}
const admin = { name 'admin', rights: 'root'}

let merge = Object.assign({}, user, admin) 
console.log(merge) 
// {name 'admin', password: 'user', rights: 'root'}

merge = {...user, ...admin} 
console.log(merge)
// {name 'admin', password: 'user', rights: 'root'}

object assign in javascript

// Object assign in javascript
let fname = { firstName : 'Black' };
let lname = { lastName : 'Panther'}
let full_names = Object.assign(fname, lname);
console.log(full_names); //{ firstName: 'Black', lastName: 'Panther' }

object.assign

const newId= tours[tours.length-1].id+1;
const newTour= Object.assign({id:newId},req.body) //object.assign() is used to merge two objects.