private void SetHeadAndTailItem(T data)
{
var item = new DuplexItem <T>(data);
head = item;
tail = item;
Count = 1;
}
public T PopFront()
{
if (Count > 0)
{
var result = head.Data;
var current = head.Previous;
current.Next = null;
head = current;
Count--;
return(result);
}
else
{
return(default(T));
}
}
public T PopBack()
{
if (Count > 0)
{
var result = tail.Data;
var current = tail.Next;
current.Previous = null;
tail = current;
Count--;
return(result);
}
else
{
return(default(T));
}
}
public void PushFront(T data)
{
if (Count == 0)
{
SetHeadAndTailItem(data);
return;
}
var item = new DuplexItem <T>(data)
{
Previous = head
};
head.Next = item;
head = item;
Count++;
}
public void PushBack(T data)
{
if (Count == 0)
{
SetHeadAndTailItem(data);
return;
}
var item = new DuplexItem <T>(data)
{
Next = tail
};
tail.Previous = item;
tail = item;
Count++;
}
