stackoverflow.com/questions/3216013/get-the-last-item-in-an-array? code example

Example 1: stackoverflow.com/questions/3216013/get-the-last-item-in-an-array?

const last = a => a[a.length - 1];
last([3, 2, 1, 5]) // return 5

Example 2: stackoverflow.com/questions/3216013/get-the-last-item-in-an-array?

const last = a => a[a.length - 1];