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What is the correct answer for cout
...P0145R3 Refining Expression Evaluation Order for Idiomatic C++ for more details.
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What is the dependency inversion principle and why is it important?
... should depend upon abstractions.
Abstractions should never depend upon details. Details should depend upon abstractions.
As to why it is important, in short: changes are risky, and by depending on a concept instead of on an implementation, you reduce the need for change at call sites.
Effectivel...
How efficient is locking an unlocked mutex? What is the cost of a mutex?
...ens often, then multiple locks would increase parallelism. At the cost of maintainability, since more locking means more debugging of the locking.
How efficient is it to lock a mutex? I.e. how much assembler instructions are there likely and how much time do they take (in the case that the mutex...
What's the difference between utf8_general_ci and utf8_unicode_ci?
..., utf8 is a flawed UTF-8 implementation from early MySQL versions which remains only for backward compatibility. The fixed version was given the name utf8mb4.
Note: Newer versions of MySQL have updated Unicode sorting rules, available under names such as utf8mb4_0900_ai_ci for equivalent rules based...
Algorithm to compare two images
...the copy may do stuff like rotating, making negative, or adding trivial details (as well as changing the dimension of the image).
...
从Sloodle看三维虚拟学习环境的发展趋势 - 资讯 - 清泛网 - 专注C/C++及内核技术
...创造了一个三维空间 ,并没有实现学习过程的全面支持 ,无法进行学习过程管理和记录以及对学习内容的跟踪和聚合 ,而传统的学习管理系统缺点是其学习过程依旧是比较正式的学习 ,通常难以引起学生的兴趣。两者的结合 ,则能...
Awk学习笔记 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...正则表达式
< <= > >= != ==
关系运算符
空格
连接
+ -
加，减
* / &
乘，除与求余
+ - !
一元加，减和逻辑非
^ ***
求幂
++ --
增加或减少，作为前缀或后缀
$
字段引用
in
...
How to convert number to words in java
..." ");
}
/**
* testing
* @param args
*/
public static void main(String[] args) {
System.out.println("*** " + EnglishNumberToWords.convert(0));
System.out.println("*** " + EnglishNumberToWords.convert(1));
System.out.println("*** " + EnglishNumberToWords.convert(16));
S...
Bomb dropping algorithm
...g layer 1, because the
"blast radius" you get from doing so is always contained within the blast radius of
another square from layer 2. You should be able to easily convince yourself of this.
So, we can reduce the problem to finding an optimal way to bomb away the perimeter, then we can repeat t...
Oracle 11.2.0.4 RAC FOR redhat 6.4 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...看一下状态
安装ORACLE
安装GRID
连接VNC 开始安装GRID 开一个终端 允许 xhost +进入/mnt/iso/oralce/grid 运行安装程序
解决中文乱码
网上下载zysong这个字体
创建自己的字体文件夹
mkdir -p /usr/share/fonts/zh_CN/T...