public static DoubleLinkedList <T> Of(IEnumerable <T> source)
{
if (ReferenceEquals(source, null))
{
throw new ArgumentNullException("Can not clone list from 'null'");
}
var list = new DoubleLinkedList <T>();
if (source is DoubleLinkedList <T> )
{
return(FromList((DoubleLinkedList <T>)source));
}
foreach (T element in source)
{
var elem = Utils.Clone(element);
if (!ReferenceEquals(elem, null))
{
list.Push((T)elem);
}
}
return(list);
}
private static DoubleLinkedList <T> FromList(DoubleLinkedList <T> source)
{
if (ReferenceEquals(source, null))
{
throw new ArgumentNullException("Can not clone list from 'null'");
}
var list = new DoubleLinkedList <T>();
var node = source.Head;
int?currPos = null;
for (int i = 0; i < source.Length; i++)
{
var val = Utils.Clone(node.Value);
list.Push((T)val);
if (ReferenceEquals(node, source.CurrentNode) && !ReferenceEquals(source.CurrentNode, null))
{
currPos = i;
}
node = node.Next;
}
if (!ReferenceEquals(currPos, null))
{
list.MoveCurrentToHead();
for (int i = 0; i < currPos; i++)
{
list++;
}
}
return(list);
}
