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<?php
namespace WS\Utils\Collections\Functions\Group\Aggregator;
use WS\Utils\Collections\Collection;
use WS\Utils\Collections\Functions\ObjectFunctions;
class Sum
{
private $fieldName;
public function __construct(string $fieldName)
$this->fieldName = $fieldName;
}
public function __invoke(Collection $collection)
$sum = 0;
foreach ($collection as $element) {
$sum += ObjectFunctions::getPropertyValue($element, $this->fieldName);
return $sum;
worksolutions /
php-collections
