예제 #1
0
        /// <summary>
        /// Adds a new node containing the specified value before the specified existing node in the <see cref="DoublyLinkedList{T}"/>.
        /// </summary>
        /// <param name="node">The <see cref="DoublyLinkedListNode{T}"/> before which to insert a new <see cref="DoublyLinkedListNode{T}"/> containing the value.</param>
        /// <param name="value">The value to add to the <see cref="DoublyLinkedList{T}"/>.</param>
        /// <returns>The new <see cref="DoublyLinkedListNode{T}"/> containing the value.</returns>
        public DoublyLinkedListNode <T> AddBefore(DoublyLinkedListNode <T> node, T value)
        {
            if (node == null)
            {
                throw new ArgumentNullException(nameof(node));
            }
            if (node.List != this)
            {
                throw new InvalidOperationException("node doesn't belong to this list");
            }

            if (node == First)
            {
                return(AddFirst(value));
            }

            var newNode = new DoublyLinkedListNode <T>(value);

            AddBefore(node, newNode);

            return(newNode);
        }
예제 #2
0
        /// <summary>
        /// Adds the specified new node at the end of the <see cref="DoublyLinkedList{T}"/>.
        /// </summary>
        /// <param name="node">The new <see cref="DoublyLinkedListNode{T}"/> to add at the end of the <see cref="DoublyLinkedList{T}"/>.</param>
        public void AddLast(DoublyLinkedListNode <T> node)
        {
            if (node == null)
            {
                throw new ArgumentNullException(nameof(node));
            }
            if (node.List != null)
            {
                throw new InvalidOperationException("node belongs to another list");
            }

            if (Count == 0)
            {
                AddFirst(node);
                return;
            }

            node.List     = this;
            node.Next     = null;
            node.Previous = Last;
            Last.Next     = node;
            Last          = node;
            Count++;
        }