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What's an easy way to read random line from a file in Unix command line?

... 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...
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What's the difference between console.dir and console.log?

... @icedwater: Depends on whether you have the console open when you call console.log or open it later. Yes, really. :-) – T.J. Crowder Jun 22 '17 at 17:12 ...
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What is the difference between typeof and instanceof and when should one be used vs. the other?

... @Luke generally a bad idea to use "new String" like this. that creates a "string object" rather than a string primitive. see section here developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/… – Colin D ...
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Convert pem key to ssh-rsa format

...m assuming no password for the keys (which is bad). Generate an RSA pair All the following methods give an RSA key pair in the same format With openssl (man genrsa) openssl genrsa -out dummy-genrsa.pem 2048 In OpenSSL v1.0.1 genrsa is superseded by genpkey so this is the new way to do it (man...
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Why does 'continue' behave like 'break' in a Foreach-Object?

...each that helps to make this conversion easy and make mistakes easy, too). All continues should be replaced with return. P.S.: Unfortunately, it is not that easy to simulate break in ForEach-Object. share | ...
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Select unique or distinct values from a list in UNIX shell script

...n the following input: class jar jar jar bin bin java uniq will output all lines exactly once: class jar bin java uniq -d will output all lines that appear more than once, and it will print them once: jar bin uniq -u will output all lines that appear exactly once, and it will print them ...
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How to get Locale from its String representation in Java?

... Call requires API level 21 (current min is 17): java.util.Locale#forLanguageTag – Vlad Oct 14 '18 at 7:53 ...
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pass post data with window.location.href

...n attribute of the form to the URL and the method attribute to POST, then call the submit method on the form tag. share | improve this answer | follow | ...
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Openssl is not recognized as an internal or external command

... Well at the place of openssl ... you have to put actually the path to your openssl folder that you have downloaded. Your actual command should look like: keytool -exportcert -alias androiddebugkey -keystore ~/.android/debug.keystore | "C:\Users\abc\openssl\bin\openssl.exe" sha1...
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Asserting successive calls to a mock method

Mock has a helpful assert_called_with() method . However, as far as I understand this only checks the last call to a method. If I have code that calls the mocked method 3 times successively, each time with different parameters, how can I assert these 3 calls with their specific parameters? ...