protected function paginate(array $rates, $criteria)
    {
        if (!array_key_exists('offset', $criteria) && !array_key_exists('limit', $criteria)) {
            return $rates;
        }

        $range = array();
        $offset = array_key_exists('offset', $criteria) ? $criteria['offset'] : 0;
        $limit = min((array_key_exists('limit', $criteria) ? $criteria['limit'] : count($rates)) + $offset, count($rates));

        for ($i = $offset; $i < $limit; $i++) {
            $range[] = $rates[$i];
        }

        return $range;
    }
protected function paginate(array $rates, $criteria)
    {
        if (!array_key_exists('offset', $criteria) && !array_key_exists('limit', $criteria)) {
            return $rates;
        }

        $range = array();
        $offset = array_key_exists('offset', $criteria) ? $criteria['offset'] : 0;
        $limit = min((array_key_exists('limit', $criteria) ? $criteria['limit'] : count($rates)) + $offset, count($rates));

        for ($i = $offset; $i < $limit; $i++) {
            $range[] = $rates[$i];
        }

        return $range;
    }
Extract requested page from filter criteria.

@param array $rates Rates to filter for pagination.
@param array $criteria Filter criteria.
@return RateInterface[] Paginated rates.