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How do I test for an empty JavaScript object?
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Here is performance test between jQuery and underscore jsperf.com/isempty-vs-isemptyobject/6
– Mikhail
Feb 9 '16 at 11:21
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What are copy elision and return value optimization?
...to a copy or move constructor is elided, that constructor must still exist and must be accessible. This ensures that copy elision does not allow copying objects which are not normally copyable, e.g. because they have a private or deleted copy/move constructor.
C++17: As of C++17, Copy Elision is gua...
Can you create nested WITH clauses for Common Table Expressions?
...wered Sep 11 '09 at 22:12
David AndresDavid Andres
28.8k77 gold badges4141 silver badges3535 bronze badges
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Undo git update-index --skip-worktree
...git-update-index.html, use
git ls-files -v
to see the "assume unchanged" and "skip-worktree" files marked with a special letter. The "skip-worktree" files are marked with S.
Edit: As @amacleod mentioned, making an alias to list all the hidden files is a nice trick to have so that you don't need t...
What is the difference between HTTP_HOST and SERVER_NAME in PHP?
What is the difference between HTTP_HOST and SERVER_NAME in PHP?
10 Answers
10
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How to check if APK is signed or “debug build”?
As far as I know, in android "release build" is signed APK. How to check it from code or does Eclipse has some kinda of secret defines?
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Asynchronous Requests with Python requests
...was written. However, you could just replace requests with grequests below and it should work.
I've left this answer as is to reflect the original question which was about using requests < v0.13.0.
To do multiple tasks with async.map asynchronously you have to:
Define a function for what yo...
Determine the process pid listening on a certain port
As the title says, I'm running multiple game servers, and every of them has the same name but different PID and the port number. I would like to match the PID of the server which is listening on certain port, and then I would like to kill this process. I need that in order to complete my bas...
Repeat each row of data.frame the number of times specified in a column
What is the simplest way to expand each row the first two columns of the data.frame above, so that each row is repeated the number of times specified in the column 'freq'?
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Difference between @import and link in CSS
I'm learning some CSS to tweak my project template. I come to this problem and didn't find a clear answer on the web. Is there a difference between using @import or link in CSS?
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