library/Rediska/Key/List.php
public function truncate($start, $end)
    {
        $result = $this->_getRediskaOn()->truncateList($this->getName(), $start, $end);

        if (!is_null($this->getExpire()) && $result) {
            $this->expire($this->getExpire(), $this->isExpireTimestamp());
        }

        return $result;
    }
public function truncate($start, $end)
    {
        $result = $this->_getRediskaOn()->truncateList($this->getName(), $start, $end);

        if (!is_null($this->getExpire()) && $result) {
            $this->expire($this->getExpire(), $this->isExpireTimestamp());
        }

        return $result;
    }
Trim the list at key to the specified range of elements

@param integer $start Start index
@param integer $end End index
@return boolean