public IEnumerable <Notebook> BackEnumerator()
{
DoubleNode <Notebook> current = Tail;
while (current != null)
{
yield return(current.Element);
current = current.PrevElement;
}
}
IEnumerator <Notebook> IEnumerable <Notebook> .GetEnumerator()
{
DoubleNode <Notebook> current = Head;
while (current != null)
{
yield return(current.Element);
current = current.NextElement;
}
}
public bool MoveNext()
{
DoubleNode <Notebook> current = (DoubleNode <Notebook>)Head;
while (current != null)
{
if (current.Element.Equals(current.Element))
{
return(true);
}
current = current.NextElement;
}
return(false);
}
//=> throw new NotImplementedException();
public void Add(Notebook value)
{
DoubleNode <Notebook> node = new DoubleNode <Notebook>(value);
if (Head == null)
{
Head = node;
}
else
{
Tail.NextElement = node;
}
Tail = node;
//throw new NotImplementedException();
}
public Notebook this[int index]
{
get
{
DoubleNode <Notebook> currentNode = Head;
int i = 0;
while (currentNode != null && i != index)
{
currentNode = currentNode.NextElement;
i++;
}
return(currentNode.Element);
}
}
