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Get operating system info
...497878/
<?php
$user_agent = $_SERVER['HTTP_USER_AGENT'];
function getOS() {
global $user_agent;
$os_platform = "Unknown OS Platform";
$os_array = array(
'/windows nt 10/i' => 'Windows 10',
'/windows nt 6.3/i' ...
Context switches much slower in new linux kernels
We are looking to upgrade the OS on our servers from Ubuntu 10.04 LTS to Ubuntu 12.04 LTS. Unfortunately, it seems that the latency to run a thread that has become runnable has significantly increased from the 2.6 kernel to the 3.2 kernel. In fact the latency numbers we are getting are hard to belie...
MySQL一次主从数据不一致的问题解决过程 - 数据库(内核) - 清泛网 - 专注C/...
...验数据一致性
建立用户并授权
注意这里要在主从创建一个同名的用户，可以从主库访问从库，主库本地可以访问主库。工具的使用都是在主库的服务器上进行,使用
pt-table-checksum校验数据一致性。
从库mysql操作
GRANT SELECT,PR...
What is an application binary interface (ABI)?
...t me to a Wikipedia article. If I could understand it, I wouldn't be here posting such a lengthy post.
16 Answers
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How can I develop for iPhone using a Windows development machine?
...
It's certainly possible to develop on a Windows machine, in fact, my first application was exclusively developed on the old Dell Precision I had at the time :)
There are three routes;
Install OSx86 (aka iATKOS / Kalyway) on a second parti...
Git for beginners: The definitive practical guide
Ok, after seeing this post by PJ Hyett , I have decided to skip to the end and go with Git .
37 Answers
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Deleting folders in python recursively
...o. As asked, the question was how to delete EMPTY directories.The docs for os.walk give an example that almost exactly matches this question: import os for root, dirs, files in os.walk(top, topdown=False): for name in dirs: os.rmdir(os.path.join(root, name))
...
Asynchronous vs Multithreading - Is there a difference?
...
@KumarVaibhav - the most common example is when a single thread works on items from a queue (for instance, the Windows message queue). If the program is in the habit of sending items into it's own queue (a common pattern) then the bit of code tha...
App Inventor 2 DynamicComponents 拓展：动态创建AI2组件对象 · App Inventor 2 中文网
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创建一个新的动态组件，它支持添加到当前 AI2 发行版的所有组件。
组件名称 参数可以是以下值：
组件的名称。...
Unicode and UTF-8 - 综合 - 清泛IT论坛，有思想、有深度
...和ucs-4 编码方式，其中,bmp是Basic Multilingual Plane的简写。
一个字符的Unicode编码(码点)是唯一确定的，但由于不同系统平台实现方式的不同（如字节序的不同)，或基于传输或节省存储空间等各种因素考虑，Unicode的实现方式各不相...