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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Epic64\Elem; |
| 6 | |
| 7 | use ArrayIterator; |
| 8 | use IteratorAggregate; |
| 9 | use Traversable; |
| 10 | |
| 11 | /** |
| 12 | * A simple collection class for fluent array transformations. |
| 13 | * If you already have a collection library, please use that one instead. |
| 14 | * |
| 15 | * @template T |
| 16 | * @implements IteratorAggregate<int, T> |
| 17 | */ |
| 18 | class ElementsList implements IteratorAggregate |
| 19 | { |
| 20 | /** |
| 21 | * @param array<T> $items |
| 22 | */ |
| 23 | public function __construct( |
| 24 | private array $items |
| 25 | ) {} |
| 26 | |
| 27 | /** |
| 28 | * Filter items using a callback. |
| 29 | * |
| 30 | * @param callable(T): bool $callback |
| 31 | * @return self<T> |
| 32 | */ |
| 33 | public function filter(callable $callback): self |
| 34 | { |
| 35 | return new self(array_values(array_filter($this->items, $callback))); |
| 36 | } |
| 37 | |
| 38 | /** |
| 39 | * Map items using a callback. |
| 40 | * |
| 41 | * @template U |
| 42 | * @param callable(T): U $callback |
| 43 | * @return self<U> |
| 44 | */ |
| 45 | public function map(callable $callback): self |
| 46 | { |
| 47 | return new self(array_map($callback, $this->items)); |
| 48 | } |
| 49 | |
| 50 | /** |
| 51 | * Get the underlying array. |
| 52 | * |
| 53 | * @return array<T> |
| 54 | */ |
| 55 | public function all(): array |
| 56 | { |
| 57 | return $this->items; |
| 58 | } |
| 59 | |
| 60 | /** |
| 61 | * Get the underlying array (alias for all()). |
| 62 | * |
| 63 | * @return array<T> |
| 64 | */ |
| 65 | public function toArray(): array |
| 66 | { |
| 67 | return $this->items; |
| 68 | } |
| 69 | |
| 70 | /** |
| 71 | * @return Traversable<int, T> |
| 72 | */ |
| 73 | public function getIterator(): Traversable |
| 74 | { |
| 75 | return new ArrayIterator($this->items); |
| 76 | } |
| 77 | } |