Method enqueue

src/data-structures/Queue.ts:23–33

* Adds an element to the back of the Queue. * @param {*} element * @return {number} The new length of the Queue.

(value: T)

   * @return {number} The new length of the Queue.
   */
  enqueue(value: T): number {
    const node = new Node(value);
    const prevLast = this._dummyTail.prev as Node<T> | DummyHeadNode;
    prevLast.next = node;

    node.prev = prevLast;
    node.next = this._dummyTail;
    this._dummyTail.prev = node;
    this._length++;
    return this._length;
  }

  /**
   * Removes the element at the front of the Queue.