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Notifier 通知扩展：功能强大的Android通知管理工具，支持通知通道、意图、...
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示例说明
此示例展示如何编程提醒功能。目的是诱导用户定期打开应用程序。
需求 Requirements：
通知在应用程序关闭后经过定义的时间段后打开
如果通知在定义的时间段内...
C++ where to initialize static const
...eturn 42; } class foo { static const int i = f(); /* Error! */ } Note that C++11 allows calling 'constexpr' functions: constexpr int f() { return 42; } class foo { static const int i = f(); /* Ok */ }
– squelart
Jul 21 '13 at 7:49
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const vs constexpr on variables
...mple a g++ extension for that), but that does not mean it's strictly legal C++ (though some more recent C or C++ standard made it legal, I forgot which one). As for differences in compiletime constants, template parameters and use as enum initializer are the only two notable differences between cons...
Where is shared_ptr?
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There are at least three places where you may find shared_ptr:
If your C++ implementation supports C++11 (or at least the C++11 shared_ptr), then std::shared_ptr will be defined in <memory>.
If your C++ implementation supports the C++ TR1 library extensions, then std::tr1::shared_ptr will ...
push_back vs emplace_back
...it is strictly equivalent to push_back(Type&& _Val).
But the real C++0x form of emplace_back is really useful: void emplace_back(Args&&...);
Instead of taking a value_type it takes a variadic list of arguments, so that means that you can now perfectly forward the arguments and cons...
Why does C++ not allow inherited friendship?
Why is friendship not at least optionally inheritable in C++? I understand transitivity and reflexivity being forbidden for obvious reasons (I say this only to head off simple FAQ quote answers), but the lack of something along the lines of virtual friend class Foo; puzzles me. Does anyone know ...
What is the difference between exit and return? [duplicate]
...es the process immediately.
Now there are also issues that are specific to C++.
C++ performs much more work than C when it is exiting from functions (return-ing). Specifically it calls destructors of local objects going out of scope. In most cases programmers won't care much of the state of a progra...
What is C# analog of C++ std::pair?
I'm interested: What is C#'s analog of std::pair in C++? I found System.Web.UI.Pair class, but I'd prefer something template-based.
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What's the result of += in C and C++?
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Semantics of the compound assignment operators is different in C and C++:
C99 standard, 6.5.16, part 3:
An assignment operator stores a value in the object designated by the left operand. An
assignment expression has the value of the left operand after the assignment, but is not an
lv...
How to forward declare a C++ template class?
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}
I haven't checked the standards, but this works on clang/gcc with -std=c++98 up to -std=c++17, so if it's not officially a standard then it looks to be unofficially so.
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