Method moveToFront

javascript/0146-lru-cache.js:45–51

(node)

    }

    moveToFront(node) {
        const [prev, next] = [this.tail.prev, this.tail];

        this.tail.prev.next = node;
        this.connectNode(node, { prev, next });
        this.tail.prev = node;
    }

    connectNode(node, top) {
        node.prev = top.prev;