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Why do we need extern “C”{ #include } in C++?
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C and C++ are superficially similar, but each compiles into a very different set of code. When you include a header file with a C++ compiler, the compiler is expecting C++ code. If, however, it is a C header, then the compiler ...
Why use non-member begin and end functions in C++11?
Every standard container has a begin and end method for returning iterators for that container. However, C++11 has apparently introduced free functions called std::begin and std::end which call the begin and end member functions. So, instead of writing
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搭建高可用mongodb集群（二）—— 副本集 - 大数据 & AI - 清泛网 - 专注C/...
...。
Sun Dec 29 20:26:13.842 [conn3] replSet replSetInitiate admin command received from client
Sun Dec 29 20:26:13.842 [conn3] replSet replSetInitiate config object parses ok, 3 members specified
Sun Dec 29 20:26:13.847 [conn3] replSet replSetInitiate all members seem up
Sun Dec 29 20:26:13....
Calling the base constructor in C#
If I inherit from a base class and want to pass something from the constructor of the inherited class to the constructor of the base class, how do I do that?
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How to make Git “forget” about a file that was tracked but is now in .gitignore?
...e you need to remove it from the index. This can be achieved with this command.
git rm --cached <file>
If you want to remove a whole folder, you need to remove all files in it recursively.
git rm -r --cached <folder>
The removal of the file from the head revision will happen on the...
How to checkout a specific Subversion revision from the command line?
... to checkout a specific revision of a folder in Subversion using the command line.
10 Answers
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How to convert C# nullable int to int
...In some future framework version, default may also become overloadable; if and when that happens, code using default will be easily able to take advantage, while explicit null or zero assignments will have to be changed.
– KeithS
Mar 23 '15 at 14:35
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Best way to detect when a user leaves a web page?
... answered Sep 29 '08 at 7:02
Andreas PeterssonAndreas Petersson
15.3k1111 gold badges5656 silver badges9090 bronze badges
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C++ Singleton design pattern
... the Singleton design pattern that is lazy-evaluated, correctly-destroyed, and thread-safe.
class S
{
public:
static S& getInstance()
{
static S instance; // Guaranteed to be destroyed.
// Instantiated on first use.
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Is it possible to use pip to install a package from a private GitHub repository?
... GitHub repository. For a public repository, I can issue the following command which works fine:
17 Answers
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