JavaScript - Loop Arrays with .map()

JavaScript has a neat Array.prototype.map() method that you can use to perform an action on all the members of the array.

The .map() method returns a new array with the mapped function applied to all of the members. You will not need to write a loop using for or forEach.

For example, this is what you would do to increment all of the numbers in an array:

var numArray = [5, 10, 15, 20, 25, 30];

var addedArray = numArray.map(function (num) {
  return num++;
});

// addedArray = [6, 11, 16, 21, 26, 31];