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How to hide command output in Bash
...hat looks like this:
your_command "Is anybody listening?" >&-
Usually, output goes either to file descriptor 1 (stdout) or 2 (stderr). If you close a file descriptor, you'll have to do so for every numbered descriptor, as &> (below) is a special BASH syntax incompatible with >&am...
Count number of matches of a regex in Javascript
... mentioned in my earlier answer, you can use RegExp.exec() to iterate over all matches and count each occurrence; the advantage is limited to memory only, because on the whole it's about 20% slower than using String.match().
var re = /\s/g,
count = 0;
while (re.exec(text) !== null) {
++count;
...
NUnit vs. MbUnit vs. MSTest vs. xUnit.net [closed]
...te for xUnit.NET. While most of the other testing frameworks mentioned are all pretty much the same, xUnit.NET has taken a pretty unique, modern, and flexible approach to unit testing. It changes terminology, so you no longer define TestFixtures and Tests...you specify Facts and Theories about your ...
How to append something to an array?
...the push() function to append more than one value to an array in a single call:
// initialize array
var arr = ["Hi", "Hello", "Bonjour", "Hola"];
// append multiple values to the array
arr.push("Salut", "Hey");
// display all values
for (var i = 0; i < arr.length; i++) {
console.log(arr[i...
Get first key in a (possibly) associative array?
...
2019 Update
Starting from PHP 7.3, there is a new built in function called array_key_first() which will retrieve the first key from the given array without resetting the internal pointer. Check out the documentation for more info.
You can use reset and key:
reset($array);
$first_key = key(...
Expansion of variables inside single quotes in a command in Bash
...
Inside single quotes everything is preserved literally, without exception.
That means you have to close the quotes, insert something, and then re-enter again.
'before'"$variable"'after'
'before'"'"'after'
'before'\''after'
Word concatenation is simply done by juxtapositi...
Get type of a generic parameter in Java with reflection
...an that the JDK eliminates type information at runtime. It's a method for allowing compile-time type checking and runtime type compatibility to coexist in the same language. As this block of code implies, the JDK retains the erased type information--it's just not associated with checked casts and ...
Why did Rails4 drop support for “assets” group in the Gemfile
...
Wasn't it also saving memory? Now all gems, even those not needed in "production" (only in precompile), are loaded and thus rails consumes more memory?
– gucki
Sep 12 '13 at 9:35
...
What is the C runtime library?
What actually is a C runtime library and what is it used for? I was searching, Googling like a devil, but I couldn't find anything better than Microsoft's: "The Microsoft run-time library provides routines for programming for the Microsoft Windows operating system. These routines automate many commo...
Simplest SOAP example
... '<soapenv:Body>' +
'<api:some_api_call soapenv:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">' +
'<username xsi:type="xsd:string">login_username</username>' +
'<password xsi:...