void remove(const key_type &key) {
            int index = bucketHash(key);

            for (int i = 0; i < sizes[index]; ++i){

                if (key == (*(buckets+index)+i)->val->first){

                    if (i != 0){
                        BucketNode *temp = (*(buckets+index)+i);
                        BucketNode *prev = temp->prev;

                        prev->next = temp->next;
                        delete temp;
                    }
                    else {
                        BucketNode *temp = (*(buckets+index)+i);
                        (*(buckets+index)) = temp->next;
                        (*(buckets+index))->prev = nullptr;

                        delete temp;
                    }

                    --sizes[index];
                }

            }

            throw std::out_of_range("");
        }