microsecond calculator

The scenario for generating a unique ID is very common, such as temporary cache file names, temporary variables, temporary security codes, and so on, and the uniqid () function generates a unique ID based on the current time in microseconds. Because

One, DS1302 write time read out the time is hexadecimal, need to convert to decimalIt should be in hexadecimal.WP write protection bit, register write address 0x8e,1 for write protection, prohibit write. 0 releaseCH (clock halt) clock stop bit,

Offered by David L. Mills of Delaware University. http://www.eecis.udel.edu/~mills [email protected]Slightly adapted from Reinhard V. Hanxleden CAU Kiel. [email protected]Original http://www.doc88.com/p-7864235424656.htmlRelated articles http://blog.

Original address: http://www.csdn.net/article/2012-06-21/2806814About performance Optimization This is a big topic, in the "12306.cn Talk about website performance Technology" in the business and design I said some of the available technologies and

1.1. Sleep functionThere are two sleep functions under Linux, and the prototypes are: #include unsigned int sleep (unsigned int seconds); void Usleep (unsigned long usec); The function sleep allows the process to seconds seconds, and the function

　 Oracle Mysql Compare versions Release 10.2.0.1.0 XE windowsxp 5.0.45-community-nt-log MySQL Community Edition (GPL) As a calculator Sql> Select from dual; Mysql> Select; Mysql>