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<?php
/**
* @author Igor Pomiluyko <[email protected]>
*/
namespace WS\Utils\Collections\Functions\Group\Aggregator;
use WS\Utils\Collections\Collection;
class Sum extends AbstractFieldAggregator implements Aggregator
{
public function __invoke(Collection $collection)
$sum = 0;
foreach ($collection as $element) {
$sum += $this->getValue($element);
}
return $sum;
worksolutions /
php-collections
