摘要：
1. for…in是遍历数组、对象的key； let arr = [1, 2, 3]; for (let i in arr) { console.log(i) //0，1，2 获得数组所在第几位 } let obj = { user: 'Ian', gender: 'male', }; for (l 阅读全文
摘要：
ssh-keygen -t rsa -C “公钥标题（key or email）” //回车键 提示：Enter file in which to save the key (/Users/用户名/.ssh/id_rsa): 复制粘贴：/Users/用户名/.ssh/id_rsa //回车键 忽略输 阅读全文