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<?php
/**
* @author Igor Pomiluyko <[email protected]>
*/
namespace WS\Utils\Collections\Functions\Group\Aggregator;
use WS\Utils\Collections\Collection;
use WS\Utils\Collections\Functions\ObjectFunctions;
class First
{
private $fieldName;
public function __construct(string $fieldName)
$this->fieldName = $fieldName;
}
public function __invoke(Collection $collection)
if (!$first = $collection->stream()->findFirst()) {
return null;
return ObjectFunctions::getPropertyValue($first, $this->fieldName);
worksolutions /
php-collections
