public DLinkedList <T> Duplicate()
{
var result = new DLinkedList <T>();
foreach (var v in this)
{
var n = new DLinkedListNode <T>(v);
result.AddLast(n);
}
return(result);
}
/// <summary>
/// Make sublist from give index, and up to size
/// </summary>
/// <param name="index"></param>
/// <param name="size">if -1 then up to end of list</param>
/// <returns></returns>
public DLinkedList <T> Duplicate(int index, int size)
{
Debug.Assert(index >= 0);
var result = new DLinkedList <T>();
if (index >= Count)
{
return(result);
}
var current = GetNodeAtIndex(index);
while (current != null && (size < 0 || size > 0))
{
var n = new DLinkedListNode <T>(current.Value);
result.AddLast(n);
size--;
current = current.Next;
}
return(result);
}