javascript es6 ? operator code example

Example 1: javascript spread operator

function sum(x, y, z) {
  return x + y + z;
}

const numbers = [1, 2, 3];

console.log(sum(...numbers));
// expected output: 6

console.log(sum.apply(null, numbers));
// expected output: 6

Example 2: es6 spread

const numbers = [43, 3, 11, 54];
const max = Math.max(...numbers); // Spreads numbers as parameters
// max is 54