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Meaning of $? (dollar question mark) in shell scripts
... in BASH are 1,2,*,# ( Normally seen in echo command as $1 ,$2 , $* , $# , etc., ) .
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How to set the java.library.path from Eclipse
...
Instead, go into the library settings for your projects and, for each jar/etc that requires a native library, expand it in the Libraries tab. In the tree view there, each library has items for source/javadoc and native library locations.
Specifically: select Project, right click -> Properties ...
Catch Ctrl-C in C
...it Ctrl-C?\n"
"Do you really want to quit? [y/n] ");
c = getchar();
if (c == 'y' || c == 'Y')
exit(0);
else
signal(SIGINT, INThandler);
getchar(); // Get new line character
}
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AngularJS: Is there any way to determine which fields are making a form invalid?
...t may violate (invalid email format, out of range / max / min definition, etc.). This is the easiest way.
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.NET data structures: ArrayList, List, HashTable, Dictionary, SortedList, SortedDictionary — Speed,
...eally the best implementation of an array (as opposed to multidimensional, etc.) - because SZs have specific intermediary language instructions for manipulating them.
Arrays are always passed by reference (as a memory address) - an important piece of the Array puzzle to know. While they do bounds ch...
How to split a long regular expression into multiple lines in JavaScript?
...pace in the regular expression string (always use \s, \s+, \s{1,x}, \t, \n etc).
(() => {
const createRegExp = (str, opts) =>
new RegExp(str.raw[0].replace(/\s/gm, ""), opts || "");
const yourRE = createRegExp`
^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"...
Should JAVA_HOME point to JDK or JRE?
... developer, you should point your JAVA_HOME at jdk to access javac copiler etc. It's good if you can test your program to run on the JRE though. If you are using an app server you often also need the JDK instead of the JRE but that depends on the particular server.
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how to make a whole row in a table clickable as a link?
...irefox), navigation (tab key), Copy link location, Open in new tab/window, etc. even for accessible / special needs browsers. My only nitpick is that I wouldn't nest a <div> inside an <a>, so the cells would be better marked up as <span>.
– Tobia
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Importing CommonCrypto in a Swift framework
...u also don't need to hard code the SDK so this should work for iOS, macOS, etc. You also don't need to have anything sitting in your project's source directory.
After creating this target, make your library/framework depend on it with a Target Dependencies item:
This will ensure the module map i...
What is the difference between is_a and instanceof?
...object
$x1 instanceof $x2 // returns false even if $x2 is int, undefined, etc.
So, is_a() highlights possible bugs while instanceof suppresses them.
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