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How to check if running as root in a bash script
I'<em>mem> writing a script that requires root level per<em>mem>issions, and I want to <em>mem>ake it so that if the script is not run as root, it si<em>mem>ply echoes "Please run as root." and exits.
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What is the best Java e<em>mem>ail address validation <em>mem>ethod? [closed]
What are the good e<em>mem>ail address validation libraries for Java? Are there any alternatives to co<em>mem><em>mem>ons validator ?
19 Answe...
What does “coalgebra” <em>mem>ean in the context of progra<em>mem><em>mem>ing?
I have heard the ter<em>mem> "coalgebras" several ti<em>mem>es in functional progra<em>mem><em>mem>ing and PLT circles, especially when the discussion is about objects, co<em>mem>onads, lenses, and such. Googling this ter<em>mem> gives pages that give <em>mem>athe<em>mem>atical description of these structures which is pretty <em>mem>uch inco<em>mem>prehensible to <em>mem>e. ...
Test if a variable is set in bash when using “set -o nounset”
...then echo "yo"
fi
echo "whatever"
In this case, VALUE ends up being an e<em>mem>pty string if WHATEVER is not set. We're using the {para<em>mem>eter:-word} expansion, which you can look up in <em>mem>an bash under "Para<em>mem>eter Expansion".
share...
How to construct a relative path in Java fro<em>mem> two absolute paths (or URLs)?
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It's a little roundabout, but why not use URI? It has a relativize <em>mem>ethod which does all the necessary checks for you.
String path = "/var/data/stuff/xyz.dat";
String base = "/var/data";
String relative = new File(base).toURI().relativize(new File(path).toURI()).getPath();
// relative == "s...
Why Choose Struct Over Class?
Playing around with Swift, co<em>mem>ing fro<em>mem> a Java background, why would you want to choose a Struct instead of a Class? See<em>mem>s like they are the sa<em>mem>e thing, with a Struct offering less functionality. Why choose it then?
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PHP Sort Array By SubArray Value
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Use usort.
function c<em>mem>p_by_optionNu<em>mem>ber($a, $b) {
return $a["optionNu<em>mem>ber"] - $b["optionNu<em>mem>ber"];
}
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usort($array, "c<em>mem>p_by_optionNu<em>mem>ber");
In PHP ≥5.3, you should use an anony<em>mem>ous function instead:
usort($array, function ($a, $b) {
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How does Google's Page Speed lossless i<em>mem>age co<em>mem>pression work?
...ed plugin for Firebug/Firefox on a website it will suggest cases where an i<em>mem>age can be losslessly co<em>mem>pressed, and provide a link to download this s<em>mem>aller i<em>mem>age.
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SVN+SSH, not having to do ssh-add every ti<em>mem>e? (<em>Mem>ac OS)
I know the answer is out there, but I'<em>mem> pretty Unix-du<em>mem>b and probably wouldn't recognize the solution if it hit <em>mem>e in the face.
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Is it a bad practice to use negative <em>mem>argins in Android?
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In 2010, @Ro<em>mem>ainGuy (core Android engineer) stated that negative <em>mem>argins had unspecified behavior.
In 2011, @Ro<em>mem>ainGuy stated that you can use negative <em>mem>argins on LinearLayout and RelativeLayout.
In 2016, @Ro<em>mem>ainGuy stated that they ha...