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Loadbalancing web sockets
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Put a L3 load-balancer that distributes IP packets based on source-IP-port hash to your WebSocket server farm. Since the L3 balancer maintains no state (using hashed source-IP-port) it will scale to wire speed on low-end hardware (say 10GbE). Since the distribution...
How does Google calculate my location on a desktop?
...onflicting info (namely, the specific info about my wifi router against my ip geolocation, which pinpoints me in the far east).
So, to answer your question, google, or someone for him, did "wardriving" around, mapping the wifi presence. Every time a query is performed to the system (probably in com...
Remote JMX connection
...oking the program with the system parameter java.rmi.server.hostname="YOUR_IP", either as an environment variable or using
java -Djava.rmi.server.hostname=YOUR_IP YOUR_APP
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Predicate Delegates in C#
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@Andrew Hare: in your first code snippet, should that be yeild return instead? Or how does that work, how does it iterate over the whole list?
– VoodooChild
Sep 26 '11 at 16:42
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Method Overloading for null argument
... an explicit "null" (yet implicit null type) argument always unambiguously selects a specific overload ??
– peterk
Jul 18 '17 at 21:43
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how to find host name from IP with out login to the host
i need to find the host name of a UNIX host whose IP is known with out login to that UNIX host
11 Answers
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How can I split and trim a string into parts all on one line?
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Try
List<string> parts = line.Split(';').Select(p => p.Trim()).ToList();
FYI, the Foreach method takes an Action (takes T and returns void) for parameter, and your lambda return a string as string.Trim return a string
Foreach extension method is meant to modif...
How to access the local Django webserver from outside world
...on port 8000.
It doesn't matter whether you access the webserver with the IP or the hostname. I guess you are still in your own LAN.
If you really want to access the server from outside, you also have to configure your router to forward port e.g. 8000 to your server.
Check your firewall on your ...
企业级负载平衡简介 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...浏览器将首先查找本地的DNS缓存是否拥有该域名所对应的IP地址。如果有，那么浏览器将尝试直接使用该IP地址访问该网站的内容。如果本地DNS缓存中没有该域名所对应的IP地址，那么它将向DNS发送一个请求，以获得该域名所对应...
How to declare variable and use it in the same Oracle SQL script?
...; exec :name := 'SALES'
PL/SQL procedure successfully completed.
SQL> select * from dept
2 where dname = :name
3 /
DEPTNO DNAME LOC
---------- -------------- -------------
30 SALES CHICAGO
SQL>
A VAR is particularly useful when we want to call a stored...