public Ds\Deque Ds\Deque::sorted([ callable $comparator ] )

<?php 
   deque = new \Ds\Deque([4, 7, 2, 9, 5, 1, 6]); 
   echo("The elements in deque: \n"); 
   print_r(deque); 

   echo("The sorted deque: \n");   print_r(deque->sorted()); 
?>

<?php 
   deque = new \Ds\Deque([4, 7, 2, 9, 5, 1, 6]);   echo("The elements in deque: \n");   print_r(deque); 

   deque =deque->sorted(function(var1,var2) { 
      return var1 <=var2; 
   }); 
   echo("The sorted deque: \n"); 
   print_r($deque); 
?>