public bool Contains(T data)
{
DoublyNode <T> current = head;
while (current != null)
{
if (current.Data.Equals(data))
{
return(true);
}
current = current.Next;
}
return(false);
}
public void Push(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 AddFront(T data)
{
DoublyNode <T> node = new DoublyNode <T>(data);
DoublyNode <T> temp = head;
node.Next = temp;
head = node;
if (count == 0)
{
tail = head;
}
else
{
temp.Previous = node;
}
count++;
}
public T Pop()
{
if (count == 0)
{
throw new InvalidOperationException();
}
T output = tail.Data;
if (count == 1)
{
head = tail = null;
}
else
{
tail = tail.Previous;
tail.Next = null;
}
count--;
return(output);
}
public T Dequeue()
{
if (count == 0)
{
throw new InvalidOperationException();
}
T output = head.Data;
if (count == 1)
{
head = tail = null;
}
else
{
head = head.Next;
head.Previous = null;
}
count--;
return(output);
}
public bool MoveNext()
{
if (head == null)
{
return(false);
}
if (node == null)
{
node = head;
return(true);
}
if (node.Next != null)
{
node = node.Next;
return(true);
}
else
{
return(false);
}
}
public bool Remove(T data)
{
DoublyNode <T> current = head;
while (current != null)
{
if (current.Data.Equals(data))
{
break;
}
current = current.Next;
}
if (current != null)
{
if (current.Next != null)
{
current.Next.Previous = current.Previous;
}
else
{
tail = current.Previous;
}
if (current.Previous != null)
{
current.Previous.Next = current.Next;
}
else
{
head = current.Next;
}
count--;
return(true);
}
return(false);
}
public void Reset()
{
node = head;
}
public DoublyEnumerator(DoublyNode <T> h)
{
head = h;
}
private void MoveDown(DoublyNode <int> el)
{
linkedList.RemoveBack();
linkedList.AddFront(el.Data);
}
private void MoveUp(DoublyNode <int> el)
{
linkedList.RemoveFront();
linkedList.Add(el.Data);
}
public void Clear()
{
head = null;
tail = null;
count = 0;
}
