spread_operator.ts

const hobbies = ['Sports', 'Cooking'];
const activeHobbies = ['Hiking'];
activeHobbies.push(...hobbies);
// const activeHobbies = ['Hiking', ...hobbies];

const person = {
  name: 'Max',
  age: 30,
};

// We're copying the pointer/reference of the person object in memory to this copiedPerson constant
const copiedPersonShallow = person;

// To create a real copy
const copiedPersonDeep = { ...person };