public bool DeleteFirstN(uint N)
{
if (First == null || Count < N)
{
return(false);
}
else
{
try
{
DLElement <T> Search = First;
for (int i = 0; i < N; i++)
{
Search = Search.Next;
}
First = Search;
First.Previous = null;
return(true);
}
catch
{
return(false);
}
}
}
public bool RemoveFirst()
{
if (First == null)
{
return(false);
}
else
{
First = First.Next;
First.Previous = null;
return(true);
}
}
public void Add(T newValue)
{
if (!CanAdd())
{
return;
}
if (First == null)
{
First = new DLElement <T>(newValue, null, First);
}
else
{
LastElement.Next = new DLElement <T>(newValue, LastElement, LastElement.Next);
}
}
private DLElement <T> Last()
{
if (First == null)
{
return(null);
}
else
{
DLElement <T> Search = First;
while (Search.Next != null)
{
Search = Search.Next;
}
return(Search);
}
}
public bool Remove(T toFind)
{
if (First == null)
{
return(false);
}
else
{
DLElement <T> Search = First;
while (!(toFind.Equals(Search.Next.Value)))
{
Search.Next = Search.Next.Next;
Search.Next.Previous = Search;
return(true);
}
return(false);
}
}
private uint Counter()
{
uint x = 0;
if (First == null)
{
return(x);
}
else
{
DLElement <T> search = First;
while (search != null)
{
search = search.Next;
x++;
}
return(x);
}
}
public DLElement <T> Indexing(int i)
{
if (First == null)
{
return(null);
}
else
{
DLElement <T> Search = First;
for (uint x = 0; x <= i; x++)
{
Search = Search.Next;
if (x == i)
{
return(Search);
}
}
return(null);
}
}
public bool Contains(T SearchValue)
{
if (First == null)
{
return(false);
}
else
{
DLElement <T> Search = First;
while (Search != null)
{
if (Search.Value.Equals(SearchValue))
{
return(true);
}
Search = Search.Next;
}
return(false);
}
}
public int IndexOf(T SearchValue)
{
if (First == null)
{
return(0);
}
else
{
int x = 1;
DLElement <T> Search = First;
while (Search != null)
{
if (Search.Value.Equals(SearchValue))
{
return(x);
}
Search = Search.Next;
x++;
}
return(0);
}
}
public void Clear()
{
First = null;
}
public void AddFirst(T newValue)
{
First = new DLElement <T>(newValue, null, First);
}
public DLList(uint x = 0)
{
First = null;
Limiter = x;
}
public DLElement(T newValue, DLElement <T> previousElement = null, DLElement <T> nextElement = null)
{
Value = newValue;
Previous = previousElement;
Next = nextElement;
}