public void Ds\Deque::reverse( void )

<?php 
   deque = new \Ds\Deque([10, 20, 30, 40, 50]);   echo("The elements in deque: \n");   var_dump(deque); 

   deque->reverse();   echo("\n The elements of reversed deque: \n");   var_dump(deque);
?>

<?php 
   deque = new \Ds\Deque(["Tutorials", "Point", "India"]);   echo("The elements in deque: \n");   print_r(deque); 

   deque->reverse();   echo("\n The elements of reversed deque: \n");   print_r(deque); 
?>