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c/c++取结构体指定成员的偏移，及原理解析 - C/C++ - 清泛网 - 专注C/C++及内核技术
c/c++取结构体指定成员的偏移，及原理解析c_offset_of可以使用std标准函数 offsetof()，在stddef h头文件中，实现原理如下（模拟系统的实现）： define MY_STRUCT_OFFSET(s, m) ((size_t)(& ((s*)0)->m ))原理如下：1、0即空指 可以使用std标准函数 of...
Apache: “AuthType not set!” 500 Error
It's been a while since I used the Apache httpd web server. I'm firing up a local server for a project and when I try to request localhost/index.html, I get a 500 error and I see this in the error log:
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Force Screen On
How do I force the screen to stay active and not shut off while my app is running?
3 Answers
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Turn off spell checking in Eclipse for good
Every time I create a new workspace in Eclipse I have to turn off the spell checking via Preferences. (Preferences->General->Editors->Text Editors->Spelling->Enable Spell Checking)
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How to convert ActiveRecord results into an array of hashes
I have an ActiveRecord result of a find operation:
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Is it possible for a unit test to assert that a method calls sys.exit()
I have a python 2.7 method that sometimes calls
4 Answers
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What is the meaning of the /dist directory in open source projects?
Since I first saw a dist/ directory in many open source projects, usually on GitHub, I've been wondering what it means.
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How to convert timestamp to datetime in MySQL?
How to convert 1300464000 to 2011-03-18 16:00:00 in MySQL?
5 Answers
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Order by multiple columns with Doctrine
I need to order data by two columns (when the rows have different values for column number 1, order by it; otherwise, order by column number 2)
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Persistent :set syntax for a given filetype?
I'm working on a Symfony2 project which uses Twig, and the filetypes are myfile.html.twig . Vim doesn't automatically detect the syntax highlighting and so applies none. I can use :set syntax=HTML after I've opened the file but this is a pain when jumping between files.
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