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select、poll、epoll之间的区别总结[整理] - C/C++ - 清泛网 - 专注C/C++及内核技术
...epoll_wait，epoll_create是创建一个epoll句柄；epoll_ctl是注册要监听的事件类型；epoll_wait则是等待事件的产生。
对于第一个缺点，epoll的解决方案在epoll_ctl函数中。每次注册新的事件到epoll句柄中时（在epoll_ctl中指定EPOLL_CTL_ADD），会...
BIO与NIO、AIO的区别(这个容易理解) - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...方式是阻塞的，而采用select函数有个好处就是它可以同时监听多个文件句柄，从而提高系统的并发性！
异步非阻塞IO:在此种模式下，用户进程只需要发起一个IO操作然后立即返回，等IO操作真正的完成以后，应用程序会得到IO操...
What is the most accurate way to retrieve a user's correct IP address in PHP?
I know there are a plethora of $_SERVER variables headers available for IP address retrieval. I was wondering if there is a general consensus as to how to most accurately retrieve a user's real IP address (well knowing no method is perfect) using said variables?
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Getting visitors country from their IP
I want to get visitors country via their IP... Right now I'm using this ( http://api.hostip.info/country.php?ip= ...... )
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Eclipse RCP开发桌面程序 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...详细信息。
如果要做到视图的交互，需要添加事件的监听器。使用Java 进行GUI开发的人应该都不会陌生，而我在RCP上，也处于探索阶段，更深一步的内容，让我们自己慢慢研究吧。
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How do I get user IP address in django?
How do I get user's IP in django?
11 Answers
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Pointer to pointer clarification
...an address, it returns the object at that memory address. So when you do *ipp = ip2, what you are doing is *ipp get the object at the address held in ipp which is ip1 and then assign to ip1 the value stored in ip2, which is the address of j.
Simply
& --> Address of
* --> Value at
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Get the client IP address using PHP [duplicate]
I want to get the client IP address who uses my website. I am using the PHP $_SERVER superglobal:
5 Answers
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数据存储组件 · App Inventor 2 中文网
...以设置和运行自己的服务器。 设置服务地址属性和服务端口属性以访问您自己的服务器。
属性
项目编号
获取此云数据库项目的编号。
服务端口
要使用的Redis服务器端口，默认为6381。
服务地址
用...
How to validate IP address in Python? [duplicate]
What's the best way to validate that an IP entered by the user is valid? It comes in as a string.
11 Answers
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