// --- Rest:
function collectNums(...numbers) {
  console.log(numbers);
}

collectNums(1, 2, 3, 4); // [1, 2, 3, 4]

// --- Spread:
function addNums(a, b) {
  console.log(a + b);
}

const myTwoNums = [1, 1];
addNums(...myTwoNums); // logs "2"

// Cloning an array
const data = [1, 2, 3];
const dataCopy = [...data];
const zeroIndexedData = [0, ...data];
// [0, 1, 2, 3]

// Merging an object
const obj = { hi: 5, bye: 10 };
const newObj = {...obj, bye: 20};
console.log(newObj); // { hi: 5, bye: 20 };