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C++静态和多态,亦敌亦友 - C/C++ - 清泛网 - 专注C/C++及内核技术
...Again的虚表中foo()的地址其实是Derived::foo(),因为DerivedAgain中的foo已经被声明为static,不会更新此函数在虚表中的地址(实际上,由于DerivedAgain没有声明任何新的虚函数,它对象的虚表同Derived对象是完全一样的,如果有兴趣,可...
import module from string variable
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importlib should be avaliable on pypi for < python2.7
– Jeffrey Jose
Aug 19 '12 at 12:12
51
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How to set an environment variable only for the duration of the script?
On Linux (Ubuntu 11.04) in bash, is it possible to temporarily set an environment variable that will only be different from the normal variable for the duration of the script? For example, in a shell script, making an app that saves to HOME portable by temporarily setting HOME to a folder in the pre...
MFC CEdit控件自绘、MFC圆角输入框 - C/C++ - 清泛网 - 专注C/C++及内核技术
MFC CEdit控件自绘、MFC圆角输入框先看效果图:解决方案:重载CEdit,处理=WM_CTLCOLOR + WM_NCPAINT强调=WM_CTLCOLOR是消息反射的,是WM_NCPAINT而不是WM_PAINT!完整代码...先看效果图:
解决方案:重载CEdit,处理“=WM_CTLCOLOR” + “WM_NCPAINT...
24点牌:appinventor摇一摇产生4个1-15之间的数字,用户自由输入四则运算算...
24点牌:appinventor摇一摇产生4个1-15之间的数字,用户自由输入四则运算算式,系统判断其结果
低效程序员的7个坏习惯 - 创意 - 清泛网 - 专注C/C++及内核技术
...是不愿意学习新创意的拒绝学习者。这种态度在所有职业中的代价都很高,但却会是软件工程师的职业终结者。 “你必须要有不断学习的好奇心,因为编程是一个终生学习的过程,”Course Report的Eggleston说。
“你需要接触社区...
[since C++11] std::array的使用 - C/C++ - 清泛网 - 专注C/C++及内核技术
... std::array的使用learning-using-cpp11-stl-array 前言本文总结了STL中的序列式容器array的用法及注意事项。array的出现代表着C++的代码更进一步现代化,就像std::string的出现代替了c风格字符串并且能和STL配合工作一样,array的 #前言
本...
Where to place $PATH variable assertions in zsh?
I love zsh , but I am not sure where to place my $PATH and other variable assertions? I find that they are scattered between the files .zshrc .zprofile .bashrc .bash_profile , and sometimes doubled.
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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
...錯誤。在呼叫connect()或sendto ()函式時,如果sockaddr_in結構中的sin_port填”0”,如此也會導致這個錯誤(在UNXI上是EADDRNOTAVAIL錯誤)。
對於WinSock函式,錯誤發生的時機和柏克萊socket函式類似,bind()和connect()都會導致這樣的錯誤。
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Making code internal but available for unit testing from other projects
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If you're using .NET, the InternalsVisibleTo assembly attribute allows you to create "friend" assemblies. These are specific strongly named assemblies that are allowed to access internal classes and members of the other assembly.
Note, this should be used with d...