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<?php |
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declare(strict_types=1); |
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namespace PublishingKit\Utilities\Collections; |
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use Countable; |
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use ArrayAccess; |
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use IteratorAggregate; |
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use ArrayIterator; |
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use JsonSerializable; |
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use Serializable; |
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use PublishingKit\Utilities\Contracts\Collectable; |
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use PublishingKit\Utilities\Traits\Macroable; |
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use OutOfBoundsException; |
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/** |
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* Collection class |
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*/ |
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class Collection implements Countable, ArrayAccess, IteratorAggregate, JsonSerializable, Collectable, Serializable |
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{ |
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use Macroable; |
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/** |
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* Items |
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* |
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* @var array |
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*/ |
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protected $items; |
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/** |
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* Position |
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* |
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* @var integer |
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*/ |
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protected $position = 0; |
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/** |
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* Return count of items |
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* |
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* @return integer |
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*/ |
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public function count() |
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{ |
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return count($this->items); |
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} |
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/** |
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* Constructor |
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* |
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* @param array $items Items to collect. |
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* @return void |
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*/ |
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public function __construct(array $items = []) |
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{ |
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$this->items = $items; |
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} |
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/** |
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* Create collection |
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* |
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* @param array $items Items to collect. |
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* @return Collection |
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*/ |
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public static function make(array $items) |
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{ |
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return new static($items); |
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} |
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/** |
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* Does item exist? |
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* |
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* @param mixed $offset The offset. |
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* @return boolean |
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*/ |
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public function offsetExists($offset) |
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{ |
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return isset($this->items[$offset]); |
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} |
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/** |
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* Get offset |
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* |
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* @param mixed $offset The offset. |
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* @return mixed |
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*/ |
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public function offsetGet($offset) |
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{ |
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return isset($this->items[$offset]) ? $this->items[$offset] : null; |
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} |
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/** |
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* Set offset |
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* |
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* @param mixed $offset The offset. |
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* @param mixed $value The value to set. |
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* @return void |
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*/ |
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public function offsetSet($offset, $value): void |
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{ |
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if (is_null($offset)) { |
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$this->items[] = $value; |
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return; |
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} |
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$this->items[$offset] = $value; |
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} |
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/** |
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* Unset offset |
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* |
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* @param mixed $offset The offset. |
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* @return void |
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*/ |
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public function offsetUnset($offset) |
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{ |
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unset($this->items[$offset]); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function getIterator() |
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{ |
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return new ArrayIterator($this->items); |
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} |
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/** |
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* Serialize collection to JSON |
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* |
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* @return string|false |
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*/ |
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public function jsonSerialize() |
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{ |
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return json_encode($this->items); |
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} |
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/** |
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* Convert collection to JSON |
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* |
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* @return string|false |
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*/ |
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public function toJson() |
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{ |
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return $this->jsonSerialize(); |
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} |
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/** |
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* Convert collection to array |
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* |
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* @return array |
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*/ |
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public function toArray() |
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{ |
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return $this->items; |
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} |
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/** |
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* Map operation |
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* |
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* @param callable $callback The callback to use. |
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* @return Collection |
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*/ |
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public function map(callable $callback) |
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{ |
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return new static(array_map($callback, $this->items)); |
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} |
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/** |
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* Filter operation |
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* |
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* @param callable $callback The callback to use. |
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* @return Collection |
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*/ |
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public function filter(callable $callback) |
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{ |
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return new static(array_filter($this->items, $callback)); |
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} |
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/** |
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* Reverse filter operation |
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* |
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* @param callable $callback The callback to use. |
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* @return Collection |
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*/ |
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public function reject(callable $callback) |
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{ |
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return $this->filter(function ($item) use ($callback) { |
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return !$callback($item); |
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}); |
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} |
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/** |
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* Reduce operation |
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* |
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* @param callable $callback The callback to use. |
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* @param mixed $initial The initial value. |
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* @return mixed |
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*/ |
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public function reduce(callable $callback, $initial = 0) |
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{ |
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$accumulator = $initial; |
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foreach ($this->items as $item) { |
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$accumulator = $callback($accumulator, $item); |
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} |
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return $accumulator; |
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} |
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/** |
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* Reduce operation that returns a collection |
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* |
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* @param callable $callback The callback to use. |
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* @param mixed $initial The initial value. |
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* @return Collection |
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*/ |
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public function reduceToCollection(callable $callback, $initial = 0): Collection |
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{ |
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$accumulator = $initial; |
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foreach ($this->items as $item) { |
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$accumulator = $callback($accumulator, $item); |
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} |
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return new static($accumulator); |
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} |
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/** |
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* Pluck a single field |
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* |
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* @param mixed $name Name of field to pluck. |
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* @return mixed |
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*/ |
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public function pluck($name) |
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{ |
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return $this->map(function (array $item) use ($name) { |
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return $item[$name]; |
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}); |
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} |
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/** |
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* Apply callback to each item in the collection |
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* |
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* @param callable $callback The callback to use. |
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* @return void |
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*/ |
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public function each(callable $callback) |
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{ |
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foreach ($this->items as $item) { |
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$callback($item); |
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} |
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} |
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/** |
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* Push item to end of collection |
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* |
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* @param mixed $item Item to push. |
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* @return Collection |
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*/ |
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public function push($item) |
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{ |
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array_push($this->items, $item); |
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return new static($this->items); |
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} |
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/** |
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* Pop item from end of collection |
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* |
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* @return mixed |
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*/ |
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public function pop() |
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{ |
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return array_pop($this->items); |
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} |
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/** |
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* Push item to start of collection |
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* |
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* @param mixed $item Item to push. |
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* @return Collection |
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*/ |
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public function unshift($item) |
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{ |
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array_unshift($this->items, $item); |
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return new static($this->items); |
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} |
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/** |
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* Pop item from start of collection |
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* |
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* @return mixed |
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*/ |
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public function shift() |
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{ |
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return array_shift($this->items); |
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} |
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/** |
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* Sort collection |
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* |
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* @param callable|null $callback The callback to use. |
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* @return Collection |
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*/ |
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public function sort(callable $callback = null) |
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{ |
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if ($callback) { |
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usort($this->items, $callback); |
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} else { |
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sort($this->items); |
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} |
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return new static($this->items); |
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} |
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/** |
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* Reverse collection |
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* |
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* @return Collection |
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*/ |
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public function reverse() |
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{ |
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return new static(array_reverse($this->items)); |
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} |
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/** |
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* Return keys |
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* |
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* @return Collection |
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*/ |
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public function keys() |
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{ |
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return new static(array_keys($this->items)); |
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} |
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/** |
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* Return values |
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* |
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* @return Collection |
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*/ |
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public function values(): Collection |
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{ |
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return new static(array_values($this->items)); |
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} |
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/** |
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* Return chunked collection |
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* |
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* @param integer $size Chunk size. |
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* @return Collection |
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*/ |
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public function chunk(int $size): Collection |
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{ |
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return new static(array_chunk($this->items, $size)); |
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} |
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/** |
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* Merge another array into the collection |
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* |
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* @param mixed $merge Array to merge. |
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* @return Collection |
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*/ |
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public function merge($merge): Collection |
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{ |
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return new static(array_merge($this->items, $merge)); |
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} |
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/** |
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* Group by a given key |
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* |
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* @param string $key Key to group by. |
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* @return Collection |
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*/ |
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public function groupBy(string $key): Collection |
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{ |
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$items = []; |
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foreach ($this->items as $item) { |
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$items[$item[$key]][] = $item; |
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} |
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return new static($items); |
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} |
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/** |
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* Flatten items |
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* |
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* @return Collection |
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*/ |
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public function flatten(): Collection |
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{ |
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$return = []; |
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array_walk_recursive($this->items, function ($a) use (&$return) { |
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$return[] = $a; |
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}); |
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return new static($return); |
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} |
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/** |
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* Paginate items |
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* |
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* @return Collection |
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*/ |
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public function paginate(int $perPage, int $page): Collection |
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{ |
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$offset = ($page - 1) * $perPage; |
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return new static(array_slice($this->items, $offset, $perPage)); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function serialize() |
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{ |
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return serialize($this->items); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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3 |
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public function unserialize($serialized) |
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{ |
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$this->items = unserialize($serialized); |
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} |
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/** |
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* @return mixed |
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*/ |
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public function pipe(callable $callback) |
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{ |
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return $callback($this); |
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} |
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} |
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