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std::string截取字符串，截取ip:port - c++1y / stl - 清泛IT社区，为创新赋能！
std::string ip("127.0.0.1:8888");
int index = ip.find_last_of(':');
// 获取ip
ip.substr(0, index).c_str();
// 获取port
ip.substr(index + 1).c_str();
php 获取操作系统、浏览器版本信息（持续更新） - 更多技术 - 清泛网 - 专...
...eregi('flashget', $agent)){
$os = 'flashget';
}
else if (eregi('webzip', $agent)){
$os = 'webzip';
}
else if (eregi('offline', $agent)){
$os = 'offline';
}
else {
$os = 'Unknown';
}
return $os;
}
二、获取浏览器信息：
/**
* 获取浏览器信息
*
* @r...
Swift 和 .Net 开源，回顾 2015 年 9 大开源事件 - 开源 & Github - 清泛网...
...件
英国情报和安全机构政府通信总部（GCHQ）是著名的监控计划，在涉及爱德华·斯诺登案后被处理。但是，像任何一个聪明的政府机构，他们使用了大量的开源软件和同开源社区协作。该机构最近将一个内部软件开源，新的...
Validating IPv4 addresses with regexp
I've been trying to get an efficient regex for IPv4 validation, but without much luck. It seemed at one point I had had it with (25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?(\.|$)){4} , but it produces some strange results:
...
How to find SQL Server running port?
...
GO
xp_readerrorlog 0, 1, N'Server is listening on'
GO
http://www.mssqltips.com/sqlservertip/2495/identify-sql-server-tcp-ip-port-being-used/
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MQTT客户端内置版使用指导 · App Inventor 2 中文网
...准备自己有权限访问的 MQTT Broker；属性面板配置服务器、端口、协议和账号，每个设备使用不同 ClientID。两个客户端订阅相同主题，一个发布另一个应收到。内置版保留基础连接与文本/字节收发，不含拓展的遗嘱、自签名证书...
Add Keypair to existing EC2 instance
...eating these steps until you have it working.
Note: If you had an Elastic IP address assigned to instance A when you stopped it, you’ll need to reassociate it after starting it up again.
Remember! If your instance B was temporarily started just for this process, don’t forget to terminate it no...
How does the socket API accept() function work?
The socket API is the de-facto standard for TCP/IP and UDP/IP communications (that is, networking code as we know it). However, one of its core functions, accept() is a bit magical.
...
Best way to simulate “group by” from bash?
Suppose you have a file that contains IP addresses, one address in each line:
14 Answers
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Increasing the maximum number of TCP/IP connections in Linux
... decrease the tcp_fin_timeout
To find out the default values:
sysctl net.ipv4.ip_local_port_range
sysctl net.ipv4.tcp_fin_timeout
The ephermal port range defines the maximum number of outbound sockets a host can create from a particular I.P. address. The fin_timeout defines the minimum time thes...