public void RemoveFirst()
{
if (head == null)
{
return;
}
else
{
head = head.Next;
}
}
public void Reverse()
{
var current = head;
LinkedListNodePractice prev = null;
while (current != null)
{
var temp = current.Next;
current.Next = prev;
prev = current;
current = temp;
}
head = prev;
}
public void AddFirst(int value)
{
var newNode = new LinkedListNodePractice(value);
if (head == null)
{
head = newNode;
}
else
{
var oldHead = head;
head = newNode;
newNode.Next = oldHead;
}
}
public void AddLast(int value)
{
var newNode = new LinkedListNodePractice(value);
if (head == null)
{
head = newNode;
}
else
{
var current = head;
while (current.Next != null)
{
current = current.Next;
}
current.Next = newNode;
}
}
public void RemoveLast()
{
if (head == null)
{
return;
}
else
{
var current = head;
LinkedListNodePractice prev = null;
while (current.Next != null)
{
prev = current;
current = current.Next;
}
prev.Next = null;
}
}
public void RemoveAtIndex(int index)
{
int indexCount = 0;
var current = head;
LinkedListNodePractice prev = null;
while (current != null)
{
if (indexCount == index)
{
//set temp to current
//prev.Next = temp.Next
prev.Next = current.Next;
return;
}
prev = current;
current = current.Next;
indexCount++;
}
}
public void AddAtIndex(int value, int index)
{
var newNode = new LinkedListNodePractice(value);
int indexCount = 0;
var current = head;
LinkedListNodePractice prev = null;
while (current != null)
{
if (index == indexCount)
{
//set temp to current
//set prev.next to newNode
//set newNode.next = temp
var temp = current;
prev.Next = newNode;
newNode.Next = temp;
return;
}
prev = current;
current = current.Next;
indexCount++;
}
}
