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Short description of the scoping rules?

...e Local — Names assigned in any way within a function (def or lambda), and not declared global in that function Enclosing-function — Names assigned in the local scope of any and all statically enclosing functions (def or lambda), from inner to outer Global (module) — Names assigned at the to...
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How to exit from PostgreSQL command line utility: psql

What command or short key can I use to exit the PostgreSQL command line utility psql ? 9 Answers ...
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Are Swift variables atomic?

In Objective-C you have a distinction between atomic and nonatomic properties: 6 Answers ...
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Where are my postgres *.conf files?

...e it because I can't find config files. Searched through entire hard drive and found only samples like pg_hba.conf.sample ...
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How to find the lowest common ancestor of two nodes in any binary tree?

... a list containing the path from root to the node by starting at the node, and front inserting the parent. So for 8 in your example, you get (showing steps): {4}, {2, 4}, {1, 2, 4} Do the same for your other node in question, resulting in (steps not shown): {1, 2} Now compare the two lists you m...
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Git - Difference Between 'assume-unchanged' and 'skip-worktree'

...us' as something to be staged. I would like to hide this particular change and not commit it. I won't make any other changes to the file. ...
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vagrant up failed, /dev/vboxnetctl: no such file or directory

... I'm running macOS High Sierra 10.13.1 and VirtualBox 5.2.2. This worked for me: Grant permission to VirtualBox under System Preferences > Security & Privacy > General (this request is new to macOS High Sierra) Open Terminal and run: sudo "/Library/Appl...
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How do you pass custom environment variable on Amazon Elastic Beanstalk (AWS EBS)?

...anyone who uses the .ebextensions/*.config way: nowadays you can add, edit and remove environment variables in the Elastic Beanstalk web interface. The variables are under Configuration → Software Configuration: Creating the vars in .ebextensions like in Onema's answer still works. It can eve...
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String's Maximum length in Java - calling length() method

...ALUE, which is 2^31 - 1 (or approximately 2 billion.) In terms of lengths and indexing of arrays, (such as char[], which is probably the way the internal data representation is implemented for Strings), Chapter 10: Arrays of The Java Language Specification, Java SE 7 Edition says the following: ...
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Convert NSArray to NSString in Objective-C

... @TechZen - no, because [array description] inserts newlines and the outer parentheses. – Dave DeLong Dec 1 '09 at 21:05 ...