public T[] ToArray()
{
DoublyNode <T> current = head;
T[] array = new T[count];
for (int i = 0; i < array.Length; i++)
{
array[i] = current.Data;
current = current.Next;
}
return(array);
}
public void Add(T data)
{
DoublyNode <T> node = new DoublyNode <T>(data);
if (head == null)
{
head = node;
}
else
{
tail.Next = node;
node.Previous = tail;
}
tail = node;
count++;
}
public void UpdateAtIndex(T newData, int index)
{
if (index >= count)
{
throw new IndexOutOfRangeException("List does not contain an item at such index.");
}
if (index < 0)
{
throw new IndexOutOfRangeException("Index cannot be negative.");
}
DoublyNode <T> current = head;
for (int i = 0; current != null; i++)
{
if (i == index)
{
current.Data = newData;
}
else
{
current = current.Next;
}
}
}
public T ItemAt(int index)
{
if (index >= count)
{
throw new IndexOutOfRangeException("List is smaller than the index.");
}
if (index < 0)
{
throw new IndexOutOfRangeException("Index cannot be negative.");
}
DoublyNode <T> current = head;
for (int i = 0; current != null; i++)
{
if (i == index)
{
return(current.Data);
}
else
{
current = current.Next;
}
}
return(default);
public void Clear()
{
head = null;
tail = null;
count = 0;
}