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Bootstrapping still requires outside support
...g language to write your new compiler in. If you were writing a new, say, C++ compiler, you would just write it in C++ and compile it with an existing compiler first. On the other hand, if you were creating a compiler for a new language, let's call it Yazzleof, you would need to write the new comp...
Why would I ever use push_back instead of emplace_back?
C++11 vectors have the new function emplace_back . Unlike push_back , which relies on compiler optimizations to avoid copies, emplace_back uses perfect forwarding to send the arguments directly to the constructor to create an object in-place. It seems to me that emplace_back does everything p...
Can I set enum start value in Java?
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Java enums are not like C or C++ enums, which are really just labels for integers.
Java enums are implemented more like classes - and they can even have multiple attributes.
public enum Ids {
OPEN(100), CLOSE(200);
private final int id;
Id...
Kill process by name?
...stall psutil" failed on my machine, saying that I needed to install Visual C++ 9.0. Screw that! I'd much rather install Cygwin or Msys.
– Andrew Bainbridge
Apr 4 '16 at 16:54
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What is exactly the base pointer and stack pointer? To what do they point?
...out Windows programs, you might probably use Visual Studio to compile your C++ code. Be aware that Microsoft uses an optimization called Frame Pointer Omission, that makes it nearly impossible to do walk the stack without using the dbghlp library and the PDB file for the executable.
This Frame Poin...
Why does an overridden function in the derived class hide other overloads of the base class?
...e rationale behind the name hiding, i.e. why it actually was designed into C++, is to avoid certain counterintuitive, unforeseen and potentially dangerous behavior that might take place if the inherited set of overloaded functions were allowed to mix with the current set of overloads in the given cl...
How to erase the file contents of text file in Python?
...e:
f = open('file.txt', 'r+')
f.truncate(0) # need '0' when using r+
In C++, you could use something similar.
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How to determine the Boost version on a system?
Is there a quick way to determine the version of the Boost C++ libraries on a system?
11 Answers
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Camera 扩展：相机拍照和录像，程序控制拍照、自动拍照实现，而无需点击系...
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功能概述
Camera 扩展允许在应用的布局中显示相机预览，支持拍照和录制视频功能。扩展提供了多种相机控制选项，包括前后摄像头切换、缩放控制等功能。
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1:1 宽高比
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VR领域的价值分析和创业机会.pdf - 文档下载 - 清泛网 - 专注IT技能提升
VR领域的价值分析和创业机会.pdfVR领域的价值分析和创业机会VR 虚拟现实 价值 机会VR（虚拟现实），已经引爆的科技风口，新的上网方式将会被重新定义。VR（虚拟现实），已经引爆的科技风口，新的上网方式将会被重新定义。
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