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Good reasons to prohibit inheritance in Java?
...prising and unpredicatable if the ancestor wasn't designed to be inherited from.
Classes should therefore come in two kinds :
Classes designed to be extended, and with enough documentation to describe how it should be done
Classes marked final
If you are writing purely internal code this may b...
How does grep run so fast?
...
Assuming your question regards GNU grep specifically. Here's a note from the author, Mike Haertel:
GNU grep is fast because it AVOIDS LOOKING AT EVERY INPUT BYTE.
GNU grep is fast because it EXECUTES VERY FEW INSTRUCTIONS FOR EACH
BYTE that it
does look at.
GNU grep uses th...
bash: mkvirtualenv: command not found
...every time you restart your shell, it's probably better to grab the output from the "which" command first, and then put the "source" line in your shell, something like this:
echo "source /path/to/virtualenvwrapper.sh" >> ~/.profile
^ This may differ slightly based on your shell. Also, be car...
How to install 2 Anacondas (Python 2 and 3) on Mac OS
...PATH, so that when you type python at the terminal it will load the Python from that environment.
If you don't want all of Anaconda, you can replace anaconda in the command above with whatever packages you want. You can use conda to install packages in that environment later, either by using the -...
string.charAt(x) or string[x]?
...
From MDN:
There are two ways to access an individual character in a string. The first is the charAt method, part of ECMAScript 3:
return 'cat'.charAt(1); // returns "a"
The other way is to treat the string as an ar...
Detect all Firefox versions in JS
...
This script detects all versions of Firefox, for Desktop, from version 1 to 46.
It's the third time I've tried to answer this question on StackOverflow because I kept finding new ways to break my script. However, I think it's working now. It's a great exercise to learn about Firef...
Best way to turn an integer into a month name in c#?
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Try GetMonthName from DateTimeFormatInfo
http://msdn.microsoft.com/en-us/library/system.globalization.datetimeformatinfo.getmonthname.aspx
You can do it by:
CultureInfo.CurrentCulture.DateTimeFormat.GetMonthName(1);
...
Why is  appearing in my HTML? [duplicate]
...Sublime Text, just open the offending file and choose "Save with Encoding" from the File menu and choose UTF-8.
– Emanuele Ciriachi
Oct 20 '17 at 12:34
add a comment
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How to detect idle time in JavaScript elegantly?
...nction, 10000); // time is in milliseconds
}
}
idleLogout();
.
Apart from the improvements regarding activity detection, and the change from document to window, this script actually calls the function, rather than letting it sit idle by.
It doesn't catch zero CPU usage directly, but that is im...
How does C compute sin() and other math functions?
...Taylor-series approximations for both sin(x) and cos(x), then using values from a precomputed table to refine the approximation.
When |x| > 2, none of the above algorithms would work, so the code starts by computing some value closer to 0 that can be fed to sin or cos instead.
There's yet another...