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Difference between one-to-many and many-to-one relationship
...ually add any columns to the table that is the "one". The Customer has no extra columns which describe the relationship with Order. In fact the Customer might also have a one-to-many relationship with ShippingAddress and SalesCall tables and yet have no additional columns added to the Customer tab...
How do I remove all non alphanumeric characters from a string except dash?
How do I remove all non alphanumeric characters from a string except dash and space characters?
13 Answers
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Are the days of passing const std::string & as a parameter over?
...Herb Sutter who suggested that the reasons to pass std::vector and std::string by const & are largely gone. He suggested that writing a function such as the following is now preferable:
...
MySQL connection not working: 2002 No such file or directory
... bound to the use of Unix domain sockets. It is not possible to open a TCP/IP connection using the hostname localhost you must use 127.0.0.1 instead." - php.net/manual/en/mysqli.quickstart.connections.php. So basically something is not working with connecting to the Unix domain sockets that allow lo...
What is the difference between active and passive FTP?
.... Thus, to support this mode, not only should your server have to have multiple ports available, your firewall should also allow connections to all those ports to pass through!
To mitigate the risks, a good solution would be to specify a range of ports on your server and then to allow only that ran...
How can I validate a string to only allow alphanumeric characters in it?
How can I validate a string using Regular Expressions to only allow alphanumeric characters in it?
10 Answers
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Can a class member function template be virtual?
...using MinGW G++ 3.4.5 on Window 7:
#include <iostream>
#include <string>
using namespace std;
template <typename T>
class A{
public:
virtual void func1(const T& p)
{
cout<<"A:"<<p<<endl;
}
};
template <typename T>
class B
: public...
Replace a character at a specific index in a string?
I'm trying to replace a character at a specific index in a string.
8 Answers
8
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CentOS搭建sock5代理服务器(XEN VPS ) - 更多技术 - 清泛网 - 专注C/C++及内核技术
...随机启动
chkconfig --add ss5
chkconfig ss5 on
ss5 默认使用1080端口，并允许任何人使用。
我们可以修改 /etc/opt/ss5/ss5.conf 中的
# SHost SPort Authentication
#
auth 0.0.0.0/0 - -
为
# SHost ...
Access-Control-Allow-Origin与跨域 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...程是什么样的？
跨域
怎样才能算跨域？协议，域名，端口都必须相同，才算在同一个域。
参考：
Are different ports on the same server considered cross-domain? (Ajax-wise)
同事李栋的博客：跨源资源共享
当跨域访问时，浏览器会发请...