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Docker build “Could not resolve 'archive.ubuntu.com'” apt-get fails to install anything
...S server 8.8.8.8 in order to turn the text address of 'google.com' into an IP address. Ironically, 8.8.8.8 is Google's public DNS server. If nslookup fails, public DNS servers like 8.8.8.8 might be blocked by your company (which I assume is for security reasons).
You'd think that adding your compan...
How do I prevent site scraping? [closed]
...t, you'll need to head to GitHub to read the extended version, with more tips and details.
In order to hinder scraping (also known as Webscraping, Screenscraping, Web data mining, Web harvesting, or Web data extraction), it helps to know how these scrapers work, and
, by extension, what prevent...
如何设置squid使外网也可以通过代理服务器上网，并且使用代理服务器的ip地...
...外网也可以通过代理服务器上网，并且使用代理服务器的ip地址按照配置文件内网可以通过服务器上网，显示的ip是本机ip，外网不能通过服务器，现在想让外网可以通过代理服务器，并且使用服务器的ip，请问...按照配置文件内...
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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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 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 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...
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...
How do I convert from BLOB to TEXT in MySQL?
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That's unnecessary. Just use SELECT CONVERT(column USING utf8) FROM..... instead of just SELECT column FROM...
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How do I escape a single quote in SQL Server?
...lue] VARCHAR(200)
)
INSERT INTO @my_table VALUES ('hi, my name''s tim.')
SELECT * FROM @my_table
Results
value
==================
hi, my name's tim.
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