map only if the array exists javascript code example

Example 1: js array map

const array1 = [1, 4, 9, 16];

// pass a function to map
const map1 = array1.map(x => x * 2);

console.log(map1);
// expected output: Array [2, 8, 18, 32]

Example 2: javascript map

const numbers = [0,1,2,3];

console.log(numbers.map((number) => {
  return number;
}));