/**
* Look at the value stored in the last item without removing from the list.
*/
public function peakBack()
{
if ($this->is_empty()) {
return NULL;
} else {
return $this->last->getData();
}
}
/**
* Constructor
* @param mixed $data
* @param Staple_Data_LinkedListNodeDouble $next
* @param Staple_Data_LinkedListNodeDouble $prev
*/
public function __construct($data, Staple_Data_LinkedListNodeDouble $next = NULL, Staple_Data_LinkedListNodeDouble $prev = NULL)
{
//Call the parent constructor
parent::__construct($data, $next);
//Set the previous node pointer
if (isset($prev)) {
$this->setPrev($prev);
}
}
