Method promote

src/data-structures/lru-cache/LRUCache.js:80–83

* Promotes the node to the end of the linked list. * It means that the node is most frequently used. * It also reduces the chance for such node to get evicted from cache. * @param {LinkedListNode} node

(node)

   * @param {LinkedListNode} node
   */
  promote(node) {
    this.evict(node);
    this.append(node);
  }

  /**
   * Appends a new node to the end of the cache linked list.