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What's an easy way to read random line from a file in Unix command line?
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You can use shuf:
shuf -n 1 $FILE
There is also a utility called rl. In Debian it's in the randomize-lines package that does exactly what you want, though not available in all distros. On its home page it actually recommends the use of shuf instead (which didn't exist when it was cr...
String output: format or concat in C#?
...en you start paying for execution footprint (cloud and infrastructure as a service, anyone?) and/or you start supporting 1 million users on something then the response to a single user on a request is not the question. The cost of servicing a request to a user is a cost to your bottom line as well a...
'No Transport' Error w/ jQuery ajax call in IE
...headers: {
'Access-Control-Allow-Origin': '*'
},
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});
The web service that answers these calls also responds with 'Access-Control-Allow-Origin: *' header.
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When to use pip requirements file versus install_requires in setup.py?
...o==1.8.1. You can create one using pip freeze > requirements.txt. (Some services, like Heroku, automatically run pip install -r requirements.txt for you.) pip install name-on-pypi does not look at requirements.txt, only at install_requires.
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Is gettimeofday() guaranteed to be of microsecond resolution?
I am porting a game, that was originally written for the Win32 API, to Linux (well, porting the OS X port of the Win32 port to Linux).
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Converting string from snake_case to CamelCase in Ruby
...equire "active_support/core_ext/string" is suffice, providing Rails is installed already.
– Masa Sakano
Jun 23 '18 at 2:03
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How to install trusted CA certificate on Android device?
I have created my own CA certificate and now I want to install it on my Android Froyo device (HTC Desire Z), so that the device trusts my certificate.
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How to get a list of all valid IP addresses in a local network? [closed]
... Is there any chance nmap might crash or do any harm to any of the services or machines running in the subnet?
– Jin
Jun 27 '17 at 19:10
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Most efficient way to concatenate strings in JavaScript?
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jsperf.com - "503: SERVICE_UNAVAILABLE".
– Pang
Aug 12 at 5:16
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Equals(=) vs. LIKE
...tify an example where these operators produce obviously different results. Allow me to quote from the MySQL manual:
Per the SQL standard, LIKE performs matching on a per-character basis, thus it can produce results different from the = comparison operator:
mysql> SELECT 'ä' LIKE 'ae' COLLA...