正常操作评论,保存时,若评论内容含有特殊表情符号,后台将报错如下: Illegal mix of collations (utf8_general_ci,IMPLICIT) and (utf8mb4_general_ci,COERCIBLE) for operation '='; nested exception is java.sql.SQLException: Illegal mix of collations (utf8_general_ci,IMPLICIT) and (utf8mb4_
type PGUID = ^TGUID; TGUID = packed record D1: LongWord; D2: Word; D3: Word; D4: array[0..7] of Byte; class operator Equal(const Left, Right: TGUID): Boolean; class operator NotEqual(const Left, Right: TGUID): Boolean; class function Empty: TGUID; st
1./etc/motd 操作:echo " Authorized users only. All activity may be monitored and reported " > /etc/motd 效果:telnet和ssh登录后的输出信息 2. /etc/issue和/etc/issue.net 操作:echo " Authorized users only. All activity may be monitored and reported " &
Ⅰ:Error Reporting 错误报告 A:Violations Associated with Buses 有关总线电气错误的各类型(共 12 项) ◆ bus indices out of range 总线分支索引超出范围 ◆ Bus range syntax errors 总线范围的语法错误 ◆ Illegal bus range values 非法的总线范围值 ◆ Illegal bus definitions 定义的总线非法 ◆ Mismatched bus label orde
转自:http://blog.csdn.net/astrotycoon/article/details/8008629 一.概述 在C语言中,函数和初始化的全局变量(包括显示初始化为0)是强符号,未初始化的全局变量是弱符号. 对于它们,下列三条规则使用: ① 同名的强符号只能有一个,否则编译器报"重复定义"错误. ② 允许一个强符号和多个弱符号,但定义会选择强符号的. ③ 当有多个弱符号相同时,链接器选择占用内存空间最大的那个. 二.哪些符号是弱符号? 我们经常在编程中碰到一种情况叫符