Map Javascript

• What is map()?
  • map() is a method of the Array object.
  • It allows you to create a new array by applying a function to each element of the original array
  • returns a new array

const nums = [1, 2, 3, 4];

const multipyThree = nums.map((current, index, originalArray) => {
	return current * 3;
});

console.log(multipyThree) // [3, 6, 9, 12]

const multipyThreeAndIndex = nums.map((current, index, originalArray) => {
	return num * 3 + index;
});

console.log(multipyThreeAndIndex); // [3, 7, 11, 15]

Map Polyfill Javascript