arr_sort.js

/*
SORT ARRAYS WITH SORT
You can use the method sort to easily sort the values in an array alphabetically or 
numerically.

Unlike the previous array methods we have been looking at, sort actually alters the 
array in place. However, it also returns this sorted array.

sort can be passed a compare function as a callback. The compare function should 
return a negative number if a should be before b, a positive number if a should be 
after b, or 0 if they are equal.

If no compare (callback) function is passed in, it will convert the values to strings 
and sort alphabetically.

Here is an example of using sort with a compare function that will sort the elements 
from smallest to largest number:

var array = [1, 12, 21, 2];
array.sort(function(a, b) {
  return a - b;
});
Use sort to sort array from largest to smallest.
*/
var array = [1, 12, 21, 2];

// Only change code below this line.

console.log(array.sort(function (al, bl) {
	return bl - al;
}));