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| 1 | <?php |
| 2 | /** |
| 3 | * Jingga |
| 4 | * |
| 5 | * PHP Version 8.1 |
| 6 | * |
| 7 | * @package phpOMS\Algorithm\Sort; |
| 8 | * @copyright Dennis Eichhorn |
| 9 | * @license OMS License 2.0 |
| 10 | * @version 1.0.0 |
| 11 | * @link https://jingga.app |
| 12 | */ |
| 13 | declare(strict_types=1); |
| 14 | |
| 15 | namespace phpOMS\Algorithm\Sort; |
| 16 | |
| 17 | /** |
| 18 | * OddEvenSort class. |
| 19 | * |
| 20 | * @package phpOMS\Algorithm\Sort; |
| 21 | * @license OMS License 2.0 |
| 22 | * @link https://jingga.app |
| 23 | * @since 1.0.0 |
| 24 | */ |
| 25 | final class OddEvenSort implements SortInterface |
| 26 | { |
| 27 | /** |
| 28 | * Constructor |
| 29 | * |
| 30 | * @since 1.0.0 |
| 31 | * @codeCoverageIgnore |
| 32 | */ |
| 33 | private function __construct() |
| 34 | { |
| 35 | } |
| 36 | |
| 37 | /** |
| 38 | * {@inheritdoc} |
| 39 | */ |
| 40 | public static function sort(array $list, int $order = SortOrder::ASC) : array |
| 41 | { |
| 42 | $sorted = false; |
| 43 | $n = \count($list); |
| 44 | |
| 45 | if ($n < 2) { |
| 46 | return $list; |
| 47 | } |
| 48 | |
| 49 | while (!$sorted) { |
| 50 | $sorted = true; |
| 51 | |
| 52 | for ($i = 1; $i < $n - 1; $i += 2) { |
| 53 | if ($list[$i]->compare($list[$i + 1], $order)) { |
| 54 | $old = $list[$i]; |
| 55 | $list[$i] = $list[$i + 1]; |
| 56 | $list[$i + 1] = $old; |
| 57 | |
| 58 | $sorted = false; |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | for ($i = 0; $i < $n - 1; $i += 2) { |
| 63 | if ($list[$i]->compare($list[$i + 1], $order)) { |
| 64 | $old = $list[$i]; |
| 65 | $list[$i] = $list[$i + 1]; |
| 66 | $list[$i + 1] = $old; |
| 67 | |
| 68 | $sorted = false; |
| 69 | } |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | return $list; |
| 74 | } |
| 75 | } |