The Little Book of Semaphores is a textbook that introduces the principles of synchronization for concurrent programming. In most computer science curricula, synchronization is a module in an Operating Systems class. OS textbooks present a standard
mysql中的去除左空格函数： LTRIM(str) Returns the string str with leading space characters removed. 以下是代码片段： 代码如下: mysql> SELECT LTRIM(‘ barbar’); -> ‘barbar’ This function is multi-byte safe. mysql中的去除右空格函数： RTRIM(str) Returns the string str with trail
