const target = { a: 1, b: 2 };<br /> const source = { b: 4, c: 5 };</p> <p>const returnedTarget = Object.assign(target, source);</p> <p>console.log(target);<br /> // expected output: Object { a: 1, b: 4, c: 5 }</p> <p>console.log(returnedTarget);<br /> // expected output: Object { a: 1, b: 4, c: 5 }<br />

const user = { name: ‘user’, password: ‘user’}<br /> const admin = { name ‘admin’, rights: ‘root’}</p> <p>let merge = Object.assign({}, user, admin)<br /> console.log(merge)<br /> // {name ‘admin’, password: ‘user’, rights: ‘root’}</p> <p>merge = {…user, …admin}<br /> console.log(merge)<br /> // {name ‘admin’, password: ‘user’, rights: ‘root’}<br />

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

const obj1 = {<br /> a: 5,<br /> b: 2<br /> }<br /> const obj2 = Object.assign({a:6 d:7}, obj1);</p> <p>console.log(obj2);<br /> // output: { a: 5 , b: 2, d:7}

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