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AbstractTypedCollection.php (4.04 KB)
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ImmutableCollection.php (2.37 KB)
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Edit: ImmutableCollection.php
<?php /** * Copyright since 2007 PrestaShop SA and Contributors * PrestaShop is an International Registered Trademark & Property of PrestaShop SA * * NOTICE OF LICENSE * * This source file is subject to the Open Software License (OSL 3.0) * that is bundled with this package in the file LICENSE.md. * It is also available through the world-wide-web at this URL: * https://opensource.org/licenses/OSL-3.0 * If you did not receive a copy of the license and are unable to * obtain it through the world-wide-web, please send an email * to license@prestashop.com so we can send you a copy immediately. * * DISCLAIMER * * Do not edit or add to this file if you wish to upgrade PrestaShop to newer * versions in the future. If you wish to customize PrestaShop for your * needs please refer to https://devdocs.prestashop.com/ for more information. * * @author PrestaShop SA and Contributors <contact@prestashop.com> * @copyright Since 2007 PrestaShop SA and Contributors * @license https://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0) */ declare(strict_types=1); namespace PrestaShop\PrestaShop\Core\Data; use ArrayIterator; use Countable; use IteratorAggregate; use Traversable; /** * @template T * @template-implements IteratorAggregate<T> */ abstract class ImmutableCollection implements IteratorAggregate, Countable { /** @var T[] */ protected $values; /** * @param T[] $values * * Keep the constructor protected to keep immutability, the subclasses should not change this constructor * and rely on a static factory method for their construction: * * public static function from(T ...$values): static */ protected function __construct(array $values) { $this->values = $values; } /** * @return ArrayIterator<string|int, T>|T[] */ public function getIterator(): Traversable { return new ArrayIterator($this->values); } public function count(): int { return count($this->values); } /** * @return T */ public function first() { return reset($this->values); } /** * @return static */ public function filter(callable $callback): self { return new static(array_filter($this->values, $callback)); } public function isEmpty(): bool { return empty($this->values); } }
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