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Evaluate expression given as a string
...o change the string into an expression:
> eval(parse(text="5+5"))
[1] 10
> class("5+5")
[1] "character"
> class(parse(text="5+5"))
[1] "expression"
Calling eval() invokes many behaviours, some are not immediately obvious:
> class(eval(parse(text="5+5")))
[1] "numeric"
> class(eval...
Prevent nginx 504 Gateway timeout using PHP set_time_limit()
I am getting 504 timeouts message from nginx when my PHP script is running longer than usual. set_time_limit(0) does not seem to prevent that! Does it not work when running php5-fpm on nginx? If so, whats the proper way of setting the time limit?
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What's an easy way to read random line from a file in Unix command line?
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edited Jul 10 '15 at 16:42
rogerdpack
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When to use DataContract and DataMember attributes?
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Ross Presser
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answered Jan 29 '11 at 12:18
marc_smarc_s
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无社交不商业，Uber将边缘化BAT - 资讯 - 清泛网 - 专注C/C++及内核技术
...出租车停在公司，现在的专车（私车）数量是出租车的10倍！
一个APP击溃了全国的出租车行业。
透过这个现象，我们看到一个奇怪的事儿，一家不拥有出租车，不拥有一个司机的互联网公司，居然打败了如此强大的出租车公...
How can an html element fill out 100% of the remaining screen height, using css only?
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The trick to this is specifying 100% height on the html and body elements.
Some browsers look to the parent elements (html, body) to calculate the height.
<html>
<body>
<div id="Header">
</div>
<div id...
How do I get the APK of an installed app without root access?
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edited Jul 30 '18 at 15:31
TylerH
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How can I get my Twitter Bootstrap buttons to right align?
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707
Insert pull-right into the class attribute and let bootstrap arrange the buttons.
For Bootstra...
How to fully remove Xcode 4
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answered Mar 12 '11 at 20:27
esqewesqew
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undefined reference to boost::system::system_category() when compiling
I'm trying to compile a program on Ubuntu 11.10 that uses the Boost libraries. I have the 1.46-dev Boost libraries from the Ubuntu Repository installed, but I get an error when compiling the program.
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