.[root@test4 ~]# fdisk /dev/sda //对sda磁盘进行分区 Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel Building a new DOS disklabel. Changes will remain in memory only, until you decide to write them. After that, of course, t
Exceptional Exception Handling in JavaScript MDN资料 Anything that can go wrong, will go wrong. Murphy’s law is even applicable to software development. For non-trivial programs, it’s not a matter of if, but when something will go wrong. Stand
在程序出错时,我们通过全局变量错误号errno和perror函数能够很快的定位到错误原因. Linux错误代码及其含义 C Name Value Description 含义Success 0 Success 成功EPERM 1 Operation not permitted 操作不允许ENOENT 2 No such file or directory 没有这样的文件或目录ESRCH 3 No such process 没有这样的过程EINTR 4 Interrupted system cal
Exceptional Exception Handling in JavaScript MDN资料 Anything that can go wrong, will go wrong. Murphy’s law is even applicable to software development. For non-trivial programs, it’s not a matter of if, but when something will go wrong. Stand
问题:最近备份mysql然后在执行mysqldump的时候提示权限和密码有问题 报错: Warning: Using a password on the command line interface can be insecure. mysqldump: Got error: : Access denied for user 'root'@'localhost' (using password: YES) when trying to connect 解决: 单独在mysqldump命令不加密码
获得对象的所有属性名 || 将对象o的所有属性名放到数组中 var o = {x:1,y:2,z:3}; var arr = []; var i = 0; for(arr[i++] in o){};//是空的循环体 console.log(arr); ["x", "y", "z"] 在js中遇到return;可以看到运行到return;函数到这就停止了,循环也停止了,只是return;后面的不执行了,在这之前打印的还在,也就是说函数和循环中的re