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SQL--合计函数(Aggregate functions):avg,count,first,last,max,min,sum
SQL--合计函数(Aggregate functions):avg,count,first,last,max,min,sumavg() 函数定义和用法AVG 函数返回数值列的平均值。NULL 值不包括在计算中。SQL AVG() 语法SELECT AVG(column_name) FROM tab...
分类:数据库   时间:2015-06-23 15:18:10    阅读次数:249
Define Functions: Keyword Arguments
Functions can also be called using keyword arguments of the form kwarg=value. For instance, the following function:def parrot(voltage, state='a stiff'...
分类:其他好文   时间:2015-06-22 14:53:31    阅读次数:107
malloc()与calloc差异
Both the malloc() and the calloc() functions are used to allocate dynamic memory. Each operates slightly different from the other. Both the malloc() a...
分类:其他好文   时间:2015-06-19 18:10:13    阅读次数:123
less的解析笔记
Less是一种动态的样式语言。Less扩展了CSS的动态行为,比如说,设置变量(Variables)、混合书写模式(mixins)、操作(operations)和功能(functions)等等,最棒的是,Less使用了现有的CSS语法,也就是说,你可以直接把你现成的样式文件“style.css”直接...
分类:其他好文   时间:2015-06-19 18:09:13    阅读次数:158
Make AngularJS $http service behave like jQuery.ajax()(转)
There is much confusion among newcomers to AngularJS as to why the$httpservice shorthand functions ($http.post(), etc.) don’t appear to be swappable w...
分类:Web程序   时间:2015-06-19 13:14:40    阅读次数:132
线程池总结(二)
上一篇主要讲了线程池的原理和实现,感觉有点意犹未尽,这篇文章是对上篇文章的一个补充,主要围绕以下两点展开,one-connection-per-thread的实现方式以及线程池中epoll的使用。one-connection-per-thread根据scheduler_functions的模板,.....
分类:编程语言   时间:2015-06-17 11:17:37    阅读次数:122
Vsftp配置
standalone模式下创建vsftpd脚本#!/bin/bash- #startupscriptfortheverysecureFtpserver //设置与chkconfig相关的选项 #chkconfig:-9813 #description:vsftpdisasecureftpserver ./etc/rc.d/init.d/functions //调用系统初始化脚本 if[-f/etc/init.d/functions];then ./etc/in..
分类:其他好文   时间:2015-06-16 14:55:53    阅读次数:139
String Functions(T-SQL)
The numbers of string functions for sql server 2008(R2) are 23.1) int ASCII(Char|varchar) :Returns the ASCII code value of the leftmost character of a...
分类:数据库   时间:2015-06-15 20:07:45    阅读次数:150
Principle of Computing (Python)学习笔记(5) BFS Searching + Zombie Apocalypse
1 Generators Generator和list comprehension非常类似Generators are a kind of iterator that are defined like functions.http://www.codeskulptor.org/#examples_g...
分类:编程语言   时间:2015-06-15 13:02:00    阅读次数:180
The YubiKey -- HOW IT WORKS
A single YubiKey has multiple functions for protecting access to your email, your apps and your physical spaces. Useone or more Yubikey features, or u...
分类:其他好文   时间:2015-06-14 22:35:47    阅读次数:182
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