public IEnumerator <T> GetEnumerator()
{
DoublyItem <T> current = head;
while (current != null)
{
yield return(current.Data);
current = current.Next;
}
}
/// <summary>
/// Добавление элемента
/// </summary>
/// <param name="data"></param>
public void Add()
{
var node = new DoublyItem <DoublyList <T> >(new DoublyList <T>());
if (head == null)
{
head = node;
}
else
{
tail.Next = node;
node.Previous = tail;
}
tail = node;
count++;
}
/// <summary>
/// Добавление элемента
/// </summary>
/// <param name="data"></param>
public void Add(T data)
{
DoublyItem <T> node = new DoublyItem <T>(data);
if (head == null)
{
head = node;
}
else
{
tail.Next = node;
node.Previous = tail;
}
tail = node;
count++;
}
/// <summary>
/// Удаление заданного элемента
/// </summary>
/// <param name="data"></param>
/// <returns></returns>
public bool Remove(int index)
{
if (index < 1 || index > count)
{
Console.WriteLine("Элемента с заданным индексом нет!");
return(false);
}
var current = head;
for (var i = index - 1; i > 0; i--)
{
current = current.Next;
}
if (current != null)
{
if (current.Next != null)
{
current.Next.Previous = current.Previous;
}
else
{
tail = current.Previous;
}
if (current.Previous != null)
{
current.Previous.Next = current.Next;
}
else
{
head = current.Next;
}
count--;
return(true);
}
return(false);
}
/// <summary>
/// Удаление заданного элемента
/// </summary>
/// <param name="data"></param>
/// <returns></returns>
public bool Remove(T data)
{
DoublyItem <T> current = head;
while (current != null)
{
if (current.Data.Equals(data))
{
break;
}
current = current.Next;
}
if (current != null)
{
if (current.Next != null)
{
current.Next.Previous = current.Previous;
}
else
{
tail = current.Previous;
}
if (current.Previous != null)
{
current.Previous.Next = current.Next;
}
else
{
head = current.Next;
}
count--;
return(true);
}
return(false);
}
