void StringLinkedList::remove(int index) {
if (empty()){
throw EmptyException("Empty list");
}
if (index < 0 || index > n - 1){
throw OutOfBoundException("Index is out of bounds");
}
else{
StringNode* remove = head, *prev = head;
int pos = 0;
while (pos != index && remove->next != NULL){
prev = remove;
remove = remove->next;
pos++;
}
if (index == 0){ removeFront(); }
else if(index == n) { removeBack(); }
else{
prev->next = remove->next;
delete remove;
n--;
}
}
}
const std::string& StringLinkedList::front() const{
if (empty()){ //Empty list check
throw EmptyException("Empty list");
}
else{ //Prints the front element
return head->elem;
}
}
Node<T>* BSTree<T>::search(const T &k) const
{
if (root_ == nullptr)
{
throw EmptyException();
}
else
{
Node<T>* node = root_;
return search(node, k);
}
}
const std::string& StringLinkedList::back() const {
if (empty()){ //Empty list check
throw EmptyException("Empty list");
}
else{
StringNode* back = head;
while (back->next != NULL){ //Transverse through the list
back = back->next;
}
return back->elem; //Returns the last element
}
}
void BSTree<T>::print(std::ostream &os/* = std::cout*/) const
{
if (root_ == nullptr)
{
throw EmptyException();
}
else
{
Node<T>* node = root_;
{
print(node, os);
}
}
}
const std::string& StringLinkedList::get(int index) const {
if (empty()){ //empty list
throw EmptyException("Empty list");
}
if (index > n - 1 || index < 0){ //If the index is bigger than the size of the linked list or if the index is smaller than 0 then it is out of range
throw OutOfBoundException("Index is Out of Bounds");
}
StringNode* v = head; int pos = 0; //Look for the element
while (pos != index){
v = v->next;
pos++;
}
return v->elem;
}
void StringLinkedList::removeBack() {
if (empty()){ //Empty list condition
throw EmptyException("Empty List");
}
if (head->next == NULL){ //Only one element in the list
delete head;
head = NULL;
n--;
}
else{ //Multiple elemetn in the string
StringNode* node = head->next, *prev = head; //sets a node equal to the next element, and a prev equal to the first elemetn
while (node->next != NULL){ //tranverse through the list
prev = node;
node = node->next;
}
prev->next = NULL; //Set the element before node's pointer to the next elemetn equal to null
delete node; //delete the pointer
}
}
void BSTree<T>::deletewithchild(const T &k)
{
if (root == nullptr)
{
throw EmptyException();
}
else if (search(k) == nullptr)
{
//throw "Empty";
}
else
{
Node<T>* node = search(k);
if (node->left != nullptr)
{
remove(node->left->key);
}
if (node->right != nullptr)
{
remove(node->right->key);
}
if (node->parent != nullptr)
{
if (node->parent->left == node)
{
node->parent->left = nullptr;
}
else
{
node->parent->right = nullptr;
}
}
this->_size -= 1;
delete node;
}
}
void BSTree<T>::remove(const T &k)
{
if (root_ == nullptr)
{
throw EmptyException();
}
else if (search(k) == nullptr)
{
//throw "Empty";
}
else
{
Node<T>* node = search(k);
if (node->left == nullptr && node->right == nullptr)
{
if (node->parent != nullptr)
{
if (node->parent->left == node)
{
node->parent->left = nullptr;
}
else
{
node->parent->right = nullptr;
}
this->size_ -= 1;
delete node;
}
else
{
delete this->root_;
this->root_ = nullptr;
this->size_ = 0;
}
}
else if (node->left == nullptr || node->right == nullptr)
{
if (node->parent != nullptr)
{
if (node->left == nullptr)
{
if (node->parent->left == node)
{
node->parent->left = node->right;
}
else
{
node->parent->right = node->right;
}
node->right->parent = node->parent;
}
else
{
if (node->parent->left == node)
{
node->parent->left = node->left;
}
else
{
node->parent->right = node->left;
}
node->left->parent = node->parent;
}
this->size_ -= 1;
delete node;
}
else
{
if (node->left == nullptr)
{
root_ = node->right;
node->right->parent = nullptr;
}
else
{
root_ = node->left;
node->left->parent = nullptr;
}
this->size_ -= 1;
delete node;
}
}
else
{
Node<T>* pos = next(node);
node->key = pos->key;
if (pos->parent->left == pos)
{
pos->parent->left = pos->right;
if (pos->right != nullptr)
{
pos->right->parent = pos->parent;
}
}
else
{
pos->parent->right = pos->right;
if (pos->right != nullptr)
{
pos->right->parent = pos->parent;
}
}
this->size_ -= 1;
delete pos;
}
}
}
