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C++中智能指针的设计和使用 - C/C++ - 清泛网 - 专注C/C++及内核技术
...可以访问U_Ptr的成员
class U_Ptr
{
friend class HasPtr;
int *ip;
size_t use;
U_Ptr(int *p) : ip(p) , use(1)
{
cout << "U_ptr constructor called !" << endl;
}
~U_Ptr()
{
delete ip;
cout << "U_ptr distructor called !" << endl;
}
};
HasPtr类需要一个析...
How can I do DNS lookups in Python, including referring to /etc/hosts?
...y sure if you want to do DNS lookups yourself or if you just want a host's ip. In case you want the latter,
import socket
print(socket.gethostbyname('localhost')) # result from hosts file
print(socket.gethostbyname('google.com')) # your os sends out a dns query
...
Max length for client ip address [duplicate]
...uld you recommend as the maximum size for a database column storing client ip addresses? I have it set to 16 right now, but could I get an ip address that is longer than that with IPv6, etc?
...
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:
...
对外网用户的squid代理+认证 - 更多技术 - 清泛网 - 专注C/C++及内核技术
....6-STABLE12 。
服务器及网络信息：
外网网卡：em0；外网ip：221.6.117.50/255.255.255.240
内网网卡：em1；内网ip：128.0.0.4/255.255.252.0
架设过程：
一、FreeBSD的安装
1、最小化安装FreeBSD6.2RELEASE
2、配置内核：
jiulongproxynew# cd /usr/src/...
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...
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();
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...
Best way to simulate “group by” from bash?
Suppose you have a file that contains IP addresses, one address in each line:
14 Answers
...
Enable remote MySQL connection: ERROR 1045 (28000): Access denied for user
...
You have to put this as root:
GRANT ALL PRIVILEGES ON *.* TO 'USERNAME'@'IP' IDENTIFIED BY 'PASSWORD' with grant option;
;
where IP is the IP you want to allow access, USERNAME is the user you use to connect, and PASSWORD is the relevant password.
If you want to allow access from any IP just p...