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Socket 错误返回码详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...+++++++
常见SOCKET错误返回码（转）
WSAEINTR (10004) 被中斷的系統呼叫
當以阻攔式進行的WinSock函式被WSACancelBlockingCall()中斷的時候，這個阻攔式函式會得到WSAEINTR這個錯誤訊息。 讀者要注意的是，當你的程式有用WSACancelBlockingCal...
计算统计特征（正态分布）函数及实例 - C/C++ - 清泛网 - 专注C/C++及内核技术
...AX_VAR;
double _ave;
//double _var;
double _sam_stdev;
double _all_stdev;
double _sum;
double _sum_2;
int _count;
double _min_v;
double _max_v;
StdevInfo()
: _ave(0.0)
//, _var(MAX_VAR)
, _sam_stdev(sqrt(MAX_VAR))
, _all_stdev(0.0)
, _sum(0.0)
...
Get all object attributes in Python? [duplicate]
Is there a way to get all attributes/methods/fields/etc. of an object in Python?
4 Answers
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Windows、Linux开放指定端口 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...认设置即可：
设置后立即生效。
Linux篇：
vi /etc/sysconfig/iptables
添加一行：
-A INPUT -m state --state NEW -m tcp -p tcp --dport 3306 -j ACCEPT
重启防火墙：
service iptables restart
Windows Linux 端口 防火墙
PHP 安装 ZIP 扩展 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...php.ini文件末尾加上extension=zip.so
我的php.ini在/usr/local/php/etc下（找到自己安装php的php.ini文件）
extension=zip.so
最后再重启下php即可。
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解决phpize 命令不存在：
可使用 which 命令查找 phpize 的...
Git Bash is extremely slow on Windows 7 x64
... performance problems. To fix permanently, edit C:\Program Files (x86\Git\etc\profile and comment out the if-then-else where __git_ps1 is added to PS1.
– Tom
Jun 29 '15 at 11:12
7...
MVVM in WPF - How to alert ViewModel of changes in Model… or should I?
...e a card up to 21 (but dealer stays put at 17), that you can split cards, etc. I assumed it all belonged in the model class and for that reason I felt I needed a BlacJackGame controller class in the model. I'm still trying to understand this and would appreciate examples/references. The idea of ...
CreateWindow()动态创建一个EditBox - C/C++ - 清泛网 - 专注C/C++及内核技术
...框等。DWORD errno = GetLastError() 查看错误代码。
2.不可在类的构造函数中创建Edit，因为此时主窗口还没有被创建出来，导致出现“Cannot create a top-level child window”错误。
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What are some (concrete) use-cases for metaclasses?
...I found that I was able to increment the figure count, call draw manually, etc, but I needed to do these before and after every plotting call. So to create both an interactive plotting wrapper and an offscreen plotting wrapper, I found it was more efficient to do this via metaclasses, wrapping the ...
What's the difference between a file descriptor and file pointer?
...ngst other things such as end-of-file and error indicator, stream position etc.
So using fopen() gives you a certain amount of abstraction compared to open(). In general you should be using fopen() since that is more portable and you can use all the other standard C functions that uses the FILE str...