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<?php /** * This file is part of the Nette Framework (https://nette.org) * Copyright (c) 2004 David Grudl (https://davidgrudl.com) */ declare(strict_types=1); namespace Nette\Iterators; /** * Applies the callback to the elements of the inner iterator. */ class Mapper extends \IteratorIterator { /** @var callable */ private $callback; public function __construct(\Traversable $iterator, callable $callback) { parent::__construct($iterator); $this->callback = $callback; } public function current(): mixed { return ($this->callback)(parent::current(), parent::key()); } }