Udemy-JS-Course-Theory-HowJavaScriptWorks/primitives.js at main · NewHellequin/Udemy-JS-Course-Theory-HowJavaScriptWorks · GitHub

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'use strict';

// Primitive types

let lastName = 'Williams';
let oldLastName = lastName;
lastName = 'Davis';
console.log(lastName, oldLastName);

// Reference Types
const jessica = {
  firstName: 'Jessica',
  lastName: 'Williams',
  age: 27,
};
const marriedJessica = jessica;
marriedJessica.lastName = 'Davis';
console.log('Before marriage: ', jessica);
console.log('After marriage: ', marriedJessica);

// marriedJessica = {};

// copying objects
const jessica2 = {
  firstName: 'Jessica',
  lastName: 'Williams',
  age: 27,
  family: ['Alice', 'Bob'],
};

const jessicaCopy = Object.assign({}, jessica2);
jessicaCopy.lastName = 'Davis';
console.log('Before marriage: ', jessica2);
console.log('After marriage: ', jessicaCopy);

jessicaCopy.family.push('Mary');
jessicaCopy.family.push('John');

console.log('Before marriage: ', jessica2);
console.log('After marriage: ', jessicaCopy);