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ZMQ: 基本原理 - 开源 & Github - 清泛网移动版 - 专注C/C++及内核技术
...MQ名字“）转换为底层传输地址的名字解析服务 。例如，字符串"Brightness-Adjustment-Service"可解析为"tcp://192.168.1.111:5555"。
关于这个问题还有许多要思考，不过主要问题似乎是拓扑是由多个节点组成的，而且名字解析服务选择这些...
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
...$database;
OPEN_MODE
--------------------
READ WRITE
查看数据库字符集
SQL> select userenv('language') from dual;
SQL> select * from props$ where name='NLS_CHARACTERSET';
SQL> select * from nls_database_parameters;
启动数据库企业管理器 oracle 用户
emctl start dbconso...
快速开发CSS的利器LESS 系列教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...而且不需要进行额外的处理（即不需要去掉px或者转换为字符串等），直接使用最基本的CSS样式书写和运算即可。
3、也存在所谓的“变量作用域”，其基本原理等同于JS的作用域，由自身开始，不断向其父级进行变量的查找，...
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
...展历史来看 ,计算机交互界面本身就经历了从黑底白字的字符界面 ,再到二维图像平面 ,继而到音/视频多媒体 ,最后发展到现在以三维图形、虚拟现实等技术引导潮流的过程。虚拟学习环境的发展也应顺应此潮流 ,才能将技术更好...
C++实现一款简单完整的聊天室服务器+客户端 - C/C++ - 清泛网 - 专注C/C++及内核技术
...rintf("Usage: %s IPAddress PortNumber/n",argv[0]);
exit(-1);
}
//把字符串的IP地址转化为u_long
unsigned long ip;
if((ip=inet_addr(argv[1]))==INADDR_NONE){
printf("不合法的IP地址：%s",argv[1]);
exit(-1);
}
//把端口号转化成整数
short port;
if((port = a...
Linux下部署企业级邮件服务器(postfix + dovecot + extmail) - 开源 & Gith...
...在其后的每个行前多置一个空格即可；postfix会把第一个字符为空格或tab的文本行视为上一行的延续；
5、启动postfix,连接发信
四、为postfix开启基于cyrus-sasl认证功能
1、检查postfix是否支持cyrus-sasl认证
postconf -a
2、配置...
NSRange to Range
...
juancazalla
9461010 silver badges1616 bronze badges
answered Oct 22 '14 at 21:46
Alex PretzlavAlex Pretzlav
15....
u'\ufeff' in Python string
...BOM, and is used to tell the difference between big- and little-endian UTF-16 encoding. If you decode the web page using the right codec, Python will remove it for you. Examples:
#!python2
#coding: utf8
u = u'ABC'
e8 = u.encode('utf-8') # encode without BOM
e8s = u.encode('utf-8-sig') # ...
How many bytes does one Unicode character take?
...s information. Those are the various unicode encodings, such as utf-8, utf-16le, utf-32 etc. They are distinguished largely by the size of of their codeunits. UTF-32 is the simplest encoding, it has a codeunit that is 32bits, which means an individual codepoint fits comfortably into a codeunit. The ...
What do numbers using 0x notation mean?
...
Literals that start with 0x are hexadecimal integers. (base 16)
The number 0x6400 is 25600.
6 * 16^3 + 4 * 16^2 = 25600
For an example including letters (also used in hexadecimal notation where A = 10, B = 11 ... F = 15)
The number 0x6BF0 is 27632.
6 * 16^3 + 11 * 16^2 + 15 * 16...