public void Add(T value)
{
int theHeight = ChooseRandomHeight(maxHeight);
if (theHeight > head.Height)
{
//resize the array
SkipListNode <T>[] temp = new SkipListNode <T> [theHeight];
for (int i = 0; i < head.Height; i++)
{
temp[i] = head.neighbors[i];
}
head.neighbors = temp;
}
SkipListNode <T> toInsert = new SkipListNode <T>(value, theHeight);
for (int level = 0; level < theHeight; level++)
{
SkipListNode <T> temp = head;
while (temp.neighbors[level] != null && temp.neighbors[level].Value.CompareTo(value) < 0)
{
temp = temp.neighbors[level];
}
if (temp.neighbors[level] != null)
{
toInsert.neighbors[level] = temp.neighbors[level];
}
temp.neighbors[level] = toInsert;
}
}
public SkipList()
{
SkipListNode <T> actualHead = new SkipListNode <T>(default(T), 1);
actualHead.neighbors = new SkipListNode <T> [1];
head = actualHead;
}
public bool Remove(T value)
{
bool hasRemoved = false;
int theHeight = head.Height - 1;
SkipListNode <T> temp = head;
for (int level = theHeight; level >= 0; level--)
{
while (temp.neighbors[level] != null && temp.neighbors[level].Value.CompareTo(value) < 0)
{
temp = temp.neighbors[level];
}
if (temp.neighbors[level] != null && temp.neighbors[level].Value.CompareTo(value) == 0)
{
temp.neighbors[level] = temp.neighbors[level].neighbors[level];
hasRemoved = true;
}
}
return(hasRemoved);
}
public void Clear()
{
head = null;
}
