public function remove($element)
    {
        $hash = $this->hash($element);
        if (isset($this->hashTable[$hash])) {
            $i = array_search($element, $this->hashTable[$hash], true);
            if ($i !== false) {
                unset($this->hashTable[$hash][$i]);
                return true;
            }
        }
        return false;
    }