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c++ boost::multi_index composite keys efficiency - c++1y / stl - 清泛IT社区，为创新赋能！
Long time reader first time poster! I'm playing around with the boost::multi_index container stuff and have a rather in-depth question that hopefully a boost or C++ container expert might know (my knowledge in C++ containers is pretty basic). For reference, the boost documentation on composite keys ...
Enumerable.Empty() equivalent for IQueryable
... after .NET Framework 4.6. For earlier versions, you can use new object[0].Cast<T>()
– TZU
Dec 20 '19 at 21:13
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How to wait for a number of threads to complete?
...tions. Depending on how you modify the provided example, you might need to cast the object turned by f.get() to your expected type.
– jt.
Jun 29 '16 at 4:41
add a comment
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Is False == 0 and True == 1 an implementation detail or is it guaranteed by the language?
...ject from 0 which is an integer.
0 == False returns True because False is cast to an integer. int(False) returns 0
The python documentation of the == operator says (help('==')):
The operators <, >, ==, >=, <=, and != compare the values of two objects. The objects need not have the...
How do I generate random integers within a specific range in Java?
... to your range parameter (Max - Min) and then truncate the decimal part by casting to an int. This is accomplished via:
Min + (int)(Math.random() * ((Max - Min) + 1))
And there you have it. A random integer value in the range [Min,Max], or per the example [5,10]:
5 + (int)(Math.random() * ((10 -...
How do I represent a time only value in .NET?
... there is no reason I think they can directly use uint and this avoids the casting in the constructor.
– shelbypereira
Jul 23 '19 at 9:12
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安装Adobe cs6出错：“please uninstall and reinstall the product” - 环...
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配置错误
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请卸载并重新安装该产品。
如果此问题仍然存在，请与 Adobe 技术支持联系以获得帮助，并提供屏幕下方显示的错误代码。
错误:16
http://www.adobe.com/cn/support/
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NSIS做的安装程序，可接受命令行参数，实现静默安装，静默卸载 - 脚本技术 ...
命令参数 /D=xxx 可以指定安装包的安装路径，覆盖安装包中设置的默认路径及注册表中默认路径。但是，/D= 后面一定不能有引号（不能写成 /D="xxx"），否则不生效，仍然按照安装包中的默认路径安装。
更多请参考英文资...
Unicode and UTF-8 - 综合 - 清泛IT论坛，有思想、有深度
Unicode预订的编码空间大小为0x0-0x10FFFF，最多可以容纳1114112（100多万）个字符，实际上并不能使用这么多的空间，于是编码方式出现了两种：ucs-2(BMP)和ucs-4 编码方式，其中,bmp是Basic Multilingual Plane的简写。
一个字符的Unicode编码(...
error: ‘uint16_t’ does not name a type - c++1y / stl - 清泛IT社区，为创新赋能！
#include <stdint.h> 解决。/**
* @file stdint.h
* Copyright 2012, 2013 MinGW.org project
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Softw...