Beispiel #1
0
        public void RemoveAt(int index)
        {
            if (index == 0) // handle edge-case
            {
                RemoveFirst();
                return;
            }

            LinkedListItem previous = head;
            LinkedListItem current  = head;
            LinkedListItem next;
            int            indexer = 0;

            while (true)
            {
                if (indexer == index)
                {
                    next = current?.GetNext();
                    //next = current != null ? current.GetNext() : current;
                    //if (current != null) { next = current.GetNext(); } else { next = current; };
                    previous.ModifyNext(next);
                    return;
                }

                indexer++;
                previous = current;
                current  = current.GetNext();

                if (current == null)
                {
                    throw new IndexOutOfRangeException();
                }
            }
        }
Beispiel #2
0
        public void ReplaceAt(int requestedIndex, Object o)
        {
            LinkedListItem previous = head;
            LinkedListItem current  = head;
            LinkedListItem next;

            int indexer = 0;

            while (true)
            {
                if (current == null)
                {
                    throw new IndexOutOfRangeException();
                }

                if (indexer == requestedIndex)
                {
                    //next = current != null ? current.GetNext() : current;
                    next = current?.GetNext();
                    var newItem = new LinkedListItem(o, next);
                    previous.ModifyNext(newItem);

                    if (indexer == 0)
                    {
                        head = newItem;
                    }
                    return;
                }

                indexer++;
                previous = current;
                current  = current.GetNext();
            }
        }
Beispiel #3
0
        public void AddAt(int index, object o)
        {
            if (index == 0) // handle edge-case
            {
                AddFirst(o);
                return;
            }

            LinkedListItem previous = head;
            LinkedListItem current  = head;
            int            indexer  = 0;

            while (true)
            {
                if (indexer == index)
                {
                    var newItem = new LinkedListItem(o, current);
                    previous.ModifyNext(newItem);
                    return;
                }
                if (current == null)
                {
                    throw new IndexOutOfRangeException();
                }

                indexer++;
                previous = current;
                current  = current.GetNext();
            }
        }