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linux 下巧妙使用squid代理服务器 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...录结构
/usr/sbin/squid –z
2．设置Squid错误提示信息为中文
在Squid的主配置文件/etc/squid/squid.conf中添加下
列语句，并使用命令“/etc/init.d/squid reload”重新载
入配置文件
error_directory /usr/share/squid/errors/Simplify_Chinese
2.5...
The Definitive C++ Book Guide and List
...t are likely to be included in C++20.
Overview of the New C++ (C++11/14) (PDF only) (Scott Meyers) (updated for C++14) These are the presentation materials (slides and some lecture notes) of a three-day training course offered by Scott Meyers, who's a highly respected author on C++. Even though the...
Why do x86-64 instructions on 32-bit registers zero the upper part of the full 64-bit register?
...
@PeterCordes microarchitecture.pdf: This gives a delay of 5 - 6 clocks. The reason is that a temporary register has been assigned to AL to make it independent of AH. The execution unit has to wait until the write to AL has retired before it is possible to ...
C/C++中的段错误（Segmentation fault） - C/C++ - 清泛网 - 专注C/C++及内核技术
...VIOLATION exception.
另外，这里有个基本上对照的中文解释，来自http://www.linux999.org/html_sql/3/132559.htm
所谓的段错误 就是指访问的内存超出了系统所给这个程序的内存空间，通常这个值是由gdtr来保存的，他是一个...
Convert light frequency to RGB?
... color component transfer function is taken from http://www.color.org/srgb.pdf, which
* follows the International Electrotechnical Commission standard IEC 61966-2-1 "Multimedia systems and equipment -
* Colour measurement and management - Part 2-1: Colour management - Default RGB colour space - sR...
How to check if two arrays are equal with JavaScript? [duplicate]
...somorphism problem http://logic.pdmi.ras.ru/~smal/files/smal_jass08_slides.pdf - fortunately it's not as hard as general graph isomorphism; there is in fact an O(#vertices) algorithm to solve it, but it can get very complicated to do it efficiently. The pathological case is if you have a set made up...
How to upload files to server using JSP/Servlet?
...ces have failed hard in this, such as roseindia.net. See also uploading of pdf file. You should rather use a real library which is used (and implicitly tested!) by millions of users for years. Such a library has proven its robustness.
When you're already on Servlet 3.0 or newer, use native API
If ...
Is it better to use std::memcpy() or std::copy() in terms to performance?
...do exactly what you ask.
See this presentation on compiler optimisations (pdf).
Here's what GCC does for a simple std::copy of a POD type.
#include <algorithm>
struct foo
{
int x, y;
};
void bar(foo* a, foo* b, size_t n)
{
std::copy(a, a + n, b);
}
Here's the disassembly (with o...
Unicode与UTF-8互转(C语言实现) - C/C++ - 清泛网 - 专注C/C++及内核技术
...是不够的, 就必须使用多个字节表达一个符号. 比如, 简体中文常见的
编码方式是GB2312, 使用两个字节表示一个汉字, 所以理论上最多可以表示
256x256=65536个符号.
2. Unicode
2.1 Unicode的定义
正如上一节所说, 世界上存在着多种...
驯服Linux OOM Killer（优质英文资料翻译） - 操作系统(内核) - 清泛网 - 专注IT技能提升
...动进行更大程度的控制。
为什么是 OOM Killer？
主要发行版内核设置/proc/sys/vm/overcommit_memory的默认值 为零，这意味着进程可以请求比系统中当前可用的内存更多的内存。这是基于试探法完成的，即分配的内存不会立即使用，并...