Reverses the deque in-place.
This function has no parameters.
No value is returned.
Example #1 Ds\Deque::reverse example
<?php$deque = new \Ds\Deque(["a", "b", "c"]);$deque->reverse();print_r($deque);?>
The above example will output something similar to:
Ds\Deque Object ( [0] => c [1] => b [2] => a )