/**
* Maintains an in-memory cache of the results yielded by the internal
* iterator.
*
* @param array|\Traversable $items The items to be filtered.
*/
public function __construct($items)
{
$this->_buffer = new SplDoublyLinkedList();
parent::__construct($items);
}
/**
* Creates an iterator from another iterator that will modify each of the values
* by converting them using a callback function.
*
* Each time the callback is executed it will receive the value of the element
* in the current iteration, the key of the element and the passed $items iterator
* as arguments, in that order.
*
* @param array|\Traversable $items The items to be filtered.
* @param callable $callback Callback.
*/
public function __construct($items, callable $callback)
{
$this->_callback = $callback;
parent::__construct($items);
$this->_innerIterator = $this->getInnerIterator();
}
