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How do MySQL indexes work?
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community wiki
Piskvor left the building
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Merge PDF files
...l the write
# operation. Thanks to
# https://stackoverflow.com/questions/6773631/problem-with-closing-python-pypdf-writing-getting-a-valueerror-i-o-operation/6773733#6773733
for input_file in input_files:
input_streams.append(open(input_file, 'rb'))
writer...
What does inverse_of do? What SQL does it generate?
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Do you understand the comment in the documentation: "for belongs_to associations has_many inverse associations are ignored.". And yet the doc uses that exact example. What am I missing here?
– dynex
Feb 16 '1...
Stashing only staged changes in git - is it possible?
...ge all your files that you need to stash.
Run git stash --keep-index. This command will create a stash with ALL of your changes (staged and unstaged), but will leave the staged changes in your working directory (still in state staged).
Run git stash push -m "good stash"
Now your "good stash" has ONL...
How can I search Git branches for a file or directory?
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git log + git branch will find it for you:
% git log --all -- somefile
commit 55d2069a092e07c56a6b4d321509ba7620664c63
Author: Dustin Sallings <dustin@spy.net>
Date: Tue Dec 16 14:16:22 2008 -0800
added somefile
% git branch -a --contains 55d2069
otherbranch
Supports globbing,...
favicon.png vs favicon.ico - why should I use PNG instead of ICO?
Other than the fact that PNG is a more common image format, is there any technical reason to favor favicon.png vs. favicon.ico?
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How to upgrade Git to latest version on macOS?
...l. Check git version to confirm.
git --version
If the output of the above command shows the latest version and does not mention Apple with the version details, then you are all set.
If however you still see apple version, then type the following two lines, which will manually set our path to the lo...
WPF OpenFileDialog with the MVVM pattern? [duplicate]
...he MVVM Toolkit or similar thing (so I can get a base ViewModel and a RelayCommand).
Here's an example of an extremely simple interface for doing basic IO operations like OpenFileDialog and OpenFile. I'm showing them both here so you don't think I'm suggesting you create one interface with one met...
Where is the php.ini file on a Linux/CentOS PC? [duplicate]
...p.ini location on the line with: "Loaded Configuration File".
Update
This command gives the path right away
cli_php_ini=php -i | grep /.+/php.ini -oE #ref. https://stackoverflow.com/a/15763333/248616
php_ini="${cli_php_ini/cli/apache2}" #replace cli by apache2 ref. https://stackoverflow.com...
How to work around the lack of transactions in MongoDB?
...MS systems if I need transactions or use atomic operations or two-phase commit . The second solution seems the best choice. The third I don't wish to follow because it seems that many things could go wrong and I can't test it in every aspect. I'm having a hard time refactoring my project to perfo...