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iOS Remote Debugging

... The selected answer is only for Safari. At the moment it's not possible to do real remote debugging in Chrome on iOS, but as with most mobile browsers you can use WeInRe for some simple debugging. It's a bit work to set up, but l...
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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...
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Is there a REAL performance difference between INT and VARCHAR primary keys?

...a decent programming background but my SQL experience is limited mostly to SELECT queries – Rob Jul 3 '12 at 14:47 ...
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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...
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Loadbalancing web sockets

... 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...
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How to strip HTML tags from a string in SQL Server?

...L = REPLACE( @text, '&', '' ); with doc(contents) as ( select chunks.chunk.query('.') from @textXML.nodes('/') as chunks(chunk) ) select @result = contents.value('.', 'varchar(max)') from doc return @result end go select dbo.StripHTML('This <i>is</i> an &...
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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...
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How do I execute a command and get the output of the command within C++ using POSIX?

...} /* switch (pid = fork())*/ } You also might want to play around with select() and non-blocking reads. fd_set readfds; struct timeval timeout; timeout.tv_sec = 0; /* Seconds */ timeout.tv_usec = 1000; /* Microseconds */ FD_ZERO(&readfds); FD_SET(childToParent[READ_FD], &amp...
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Code Golf - π day

... area="{@area}"/> </xsl:variable> <xsl:apply-templates select="msxsl:node-set($next)"/> </xsl:template> <!-- End of the line?--> <xsl:template match="s[@x > @R]"> <xsl:variable name="next"> <!-- Go to next line.--> &l...
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...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...