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Regex how to match an optional character
I have a regex that I thought was working correctly until now. I need to match on an optional character. It may be there or it may not.
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Find the extension of a filename in Ruby
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How to sort the result from string_agg()
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What is the difference between t.belongs_to and t.references in rails?
What is the difference between t.references and t.belongs_to ?
Why are we having those two different words? It seems to me they do the same thing?
Tried some Google search, but find no explanation.
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Specify pane percentage in tmuxinator project
How can I specify a pane percentage in tmuxinator ?
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Rails: where does the infamous “current_user” come from?
I've been looking around recently into Rails and notice that there are a lot of references to current_user . Does this only come from Devise? and do I have to manually define it myself even if I use Devise? Are there prerequisites to using current_user (like the existence of sessions, users, etc)...
预编译头文件来自编译器的早期版本，或者预编译头为 C++ 而在 C 中使用它(...
预编译头文件来自编译器的早期版本，或者预编译头为 C++ 而在 C 中使用它(或相反)现象&原因：当 Visual C++ 项目启用了预编译头 (Precompiled header) 功能时，如果项目中同时混合有 .c 和 .cpp 源文件，则可能...现象&原因：
当 Visual C++...
c/c++如何判断指针无效？如NULL,0xcccccccc,0xfeeefeee,野指针等 - C/C++ -...
c/c++如何判断指针无效？如NULL,0xcccccccc,0xfeeefeee,野指针等c c++如何判断指针无效？不仅仅是NULL的判断，有时由于指针释放没有赋NULL，指针会变成野指针或诸如0xcccccccc,0xfeeefeee形式的无效指针，...c/c++如何判断指针无效？不仅仅是N...
Uninstall ReSharper 4.5
...harper 4.5 in Visual Studio 2008. Now I want to install ReSharper 5, but I can't do it before I uninstall ReSharper 4.5.
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Scala downwards or decreasing for loop?
In Scala, you often use an iterator to do a for loop in an increasing order like:
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