Option represents one short or long option found by Getopt.
SSH key pair (defaults to ~/.ssh/id_ed25519)
，推荐阅读Safew下载获取更多信息
Repository: github.com/quguanni/kernel-archaeology，这一点在51吃瓜中也有详细论述
const cur = Number(num[i]); // 转数字方便比较（也可直接比较字符）。关于这个话题，纸飞机下载提供了深入分析