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Why doesn't GCC optimize a*a*a*a*a*a to (a*a*a)*(a*a*a)?
...loating point operations, or even the -ffast-math option which allows even more aggressive tradeoffs of accuracy against speed.
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Python extending with - using super() Python 3 vs Python 2
...start being complicated if you introduce multiple inheritance (subclassing more than one class at a time). This is because if more than one base class has __init__, your class will inherit the first one only.
In such cases, you should really use super if you can, I'll explain why. But not always yo...
How can I distribute python programs?
...k image type of thing, I don't know how to do that. But read this post for more information on the user experience of it. For an application made for programmers you are probably OK with a distutils type install on OS X too.
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How do I find the MySQL my.cnf location
...and to trace this, it's a little too abstract. The file might be in 5 (or more?) locations, and they would all be valid because they load cascading.
/etc/my.cnf
/etc/mysql/my.cnf
$MYSQL_HOME/my.cnf
[datadir]/my.cnf
~/.my.cnf
Those are the default locations MySQL looks at. If it finds more than...
Chrome desktop notification example [closed]
...ear automatically after a few seconds
Service Worker notifications - a bit more complicated, but they can work in the background (even after the page is closed), are persistent, and support action buttons
The API call takes the same parameters (except for actions - not available on desktop notific...
What is the purpose of Looper and how to use it?
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is there a Java equivalent to null coalescing operator (??) in C#? [duplicate]
... to cut down on length much), but at the syntax level there isn't anything more succinct available.
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Replace String in all files in Eclipse
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For more granularity you can do the "File Search" then make multiple selections, right-click and go to "Replace Selected...". For a full answer and example with screenshots see here: stackoverflow.com/a/50283848/4561887.
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Move entire line up and down in Vim
...ine looks like a Vim bug. I put a hack to avoid it. Probably there is some more accurate solution.
Update
There are a lot of unexplained difficulties with just using Vim combinations. These are line missing and extra line jumping.
So here is the scripting solution which can be placed either insid...
How to change the output color of echo in Linux
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