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Group query results by month and year in postgresql
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Take a look at example E of this tutorial -> https://www.postgresqltutorial.com/postgresql-group-by/
You need to call the function on your GROUP BY instead of calling the name of the virtual attribute you created on select.
I was doing what all the answers above recom...
How does #include work in C++? [duplicate]
...y it could, in fact, speed up compilation time depending on your project. (https://gcc.gnu.org/onlinedocs/gcc/Precompiled-Headers.html)
I would, however, suggest that you take time to learn about each of the sl/stl headers and include them separately instead, and not use "super headers" except for ...
How to get distinct values from an array of objects in JavaScript?
...many of the performance pitfalls involved (obsolete jsperf).
Performance
https://jsperf.com/filter-vs-dictionary-more-data When I ran this dictionary was 96% faster.
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Take a full page screenshot with Firefox on the command-line
...u can create a screenshot in headless mode like this:
firefox -screenshot https://developer.mozilla.com
Read more in the documentation.
Update 2017-06-15
As of Firefox 55 there is Firefox Screenshots as a more flexible alternative. As of Firefox 57 Screenshots can capture a full page, too.
Ori...
Delete all local changesets and revert to tree
...revision
to kill any revision and its subtree in your local repository.
https://www.mercurial-scm.org/wiki/Strip
But don't try to use it for anything that has been already pushed.
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How to use git merge --squash?
...re branch commits, which you can customize.
I explain it thoroughly here: https://youtu.be/FQNAIacelT4
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How to set NODE_ENV to production/development in OS X
...onfig() and read the values. Easily changed, easily read, cross platform.
https://www.npmjs.com/package/dotenv
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What is a good Java library to zip/unzip files? [closed]
...u can check out is zt-zip available from Maven central and project page at https://github.com/zeroturnaround/zt-zip
It has the standard packing and unpacking functionality (on streams and on filesystem) + lots of helper methods to test for files in an archive or add/remove entries.
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What does $.when.apply($, someArray) do?
...ass it an array of arguments, it's very powerful. For more info on .apply: https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/Function/apply
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Git blame — prior commits?
...has to be installed separately:
apt-get install git-gui
From the docs:
https://git-scm.com/docs/git-gui
DESCRIPTION
A Tcl/Tk based graphical user interface to Git. git gui focuses on
allowing users to make changes to their repository by making new
commits, amending existing ones, cr...