public ISinglyLinkedList <T> AddLast(SinglyLinkedItem <T> newItem)
{
Tail.Next = newItem;
Tail = Tail.Next;
IncrementLength();
return(this);
}
public ISinglyLinkedList <T> Clear()
{
Length = 0;
Head = null;
Tail = null;
return(this);
}
public ISinglyLinkedList <T> RemoveAfter(SinglyLinkedItem <T> previousItem)
{
if (previousItem.Next == null)
{
return(this);
}
previousItem.Next = previousItem.Next.Next;
DecrementLength();
return(this);
}
public ISinglyLinkedList <T> RemoveFirst()
{
Head = Head.Next;
if (Head == null)
{
Tail = null;
}
DecrementLength();
return(this);
}
public ISinglyLinkedList <T> AddFirst(SinglyLinkedItem <T> newItem)
{
newItem.Next = Head;
Head = newItem;
if (Tail == null)
{
Tail = newItem;
}
IncrementLength();
return(this);
}
public ISinglyLinkedList <T> AddAfter(SinglyLinkedItem <T> newItem, SinglyLinkedItem <T> previousItem)
{
if (previousItem == null)
{
return(this);
}
previousItem.Next = newItem;
IncrementLength();
if (IsTail(previousItem))
{
Tail = newItem;
}
return(this);
}
public ISinglyLinkedList <T> AddAfter(T data, SinglyLinkedItem <T> previousItem)
{
return(AddAfter(new SinglyLinkedItem <T>(data), previousItem));
}
public bool IsTail(SinglyLinkedItem <T> item)
{
return(Tail == item);
}
public bool IsHead(SinglyLinkedItem <T> item)
{
return(Head == item);
}
