private int bfactor(AVLNode <T> elem)
{
return(height(elem.right) - height(elem.left));
}
public void remove(T item)
{
AVLNode <T> curr_node = node;
while (true)
{
if (item.CompareTo(curr_node.data) == 0)
{
bool isLeftChild = true;
if (Object.ReferenceEquals(curr_node, curr_node.parent.right))
{
isLeftChild = false;
}
if (curr_node.left == null && curr_node.right == null)
{
if (isLeftChild)
{
curr_node.parent.left = null;
}
else
{
curr_node.parent.right = null;
}
count--;
return;
}
else if (curr_node.left == null && curr_node.right != null)
{
if (isLeftChild)
{
curr_node.parent.left = curr_node.right;
}
else
{
curr_node.parent.right = curr_node.right;
}
fullBalance(curr_node);
count--;
return;
}
else if (curr_node.left != null && curr_node.right == null)
{
if (isLeftChild)
{
curr_node.parent.left = curr_node.left;
}
else
{
curr_node.parent.right = curr_node.left;
}
fullBalance(curr_node);
count--;
return;
}
else if (curr_node.left != null && curr_node.right != null)
{
AVLNode <T> temp = curr_node.right;
while (temp.left != null)
{
temp = temp.left;
}
curr_node.data = temp.data;
if (temp.right != null)
{
if (Object.ReferenceEquals(temp, temp.parent.left))
{
temp.parent.left = temp.right;
}
else
{
temp.parent.right = temp.right;
}
}
else
if (Object.ReferenceEquals(temp, temp.parent.left))
{
temp.parent.left = null;
}
else
{
temp.parent.right = null;
}
fullBalance(curr_node);
count--;
return;
}
}
else if (curr_node == null)
{
return;
}
else if (item.CompareTo(curr_node.data) < 0)
{
curr_node = curr_node.left;
}
else if (item.CompareTo(curr_node.data) > 0)
{
curr_node = curr_node.right;
}
}
}
