https://www.codewars.com/kata/541629460b198da04e000bb9
Find the last element of the given argument(s).
Examples:
last([1, 2, 3, 4]); // => 4
last('xyz'); // => "z"
last(1, 2, 3, 4); // => 4
In javascript
and CoffeeScript
a list will be an array, a string or the list of arguments.
(courtesy of haskell.org)