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select、poll、epoll之间的区别总结[整理] - C/C++ - 清泛网 - 专注C/C++及内核技术
...1、select实现
select的调用过程如下所示：
（1）使用copy_from_user从用户空间拷贝fd_set到内核空间
（2）注册回调函数__pollwait
（3）遍历所有fd，调用其对应的poll方法（对于socket，这个poll方法是sock_poll，sock_poll根据情况会调用到...
Sort hash by key, return hash in Ruby
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In Ruby 2.1 it is simple:
h.sort.to_h
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Get real path from URI, Android KitKat new storage access framework [duplicate]
Before the new gallery access in Android 4.4 (KitKat) I got my real path on the SD card with this method:
9 Answers
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An error occurred while validating. HRESULT = '8000000A'
...ile when using devenv on an automatic build. I have gone through every website I can find, and the usual answers mention refreshing dependencies (Which I believe fixes it for manual deployment, but not for automatic) and removing the source control coding from the projects, which hasn't helped me.
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How to split long commands over multiple lines in PowerShell
How do you take a command like the following in PowerShell and split it across multiple lines?
8 Answers
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Colon (:) in Python list index [duplicate]
I'm new to Python. I see : used in list indices especially when it's associated with function calls.
3 Answers
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require file as string
...ort any file as a string. Lets say I have a txt file all I want is to load it into a variable as such.
5 Answers
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How to sort with a lambda?
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Got it.
sort(mMyClassVector.begin(), mMyClassVector.end(),
[](const MyClass & a, const MyClass & b) -> bool
{
return a.mProperty > b.mProperty;
});
I assumed it'd figure out that the > operator retu...
Is it possible to declare a variable in Gradle usable in Java?
Is it possible to declare a variable in Gradle usable in Java ?
Basically I would like to declare some vars in the build.gradle and then getting it (obviously) at build time. Just like a pre-processor macros in C/C++...
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How to compile for Windows on Linux with gcc/g++?
I have written some effects in C++ (g++) using freeglut on Linux, and I compile them with
7 Answers
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