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How to get random value out of an array?
...sults[] = $array[$key];
}
return $results;
}
Usage:
$items = ['foo', 'bar', 'baz', 'lorem'=>'ipsum'];
array_random($items); // 'bar'
array_random($items, 2); // ['foo', 'ipsum']
A few notes:
$amount has to be less than or equal to count($array).
array_rand() doesn't shuffle keys ...
What is the Java ?: operator called and what does it do?
... count = getHereCount(index);
else
count = getAwayCount(index);
It's called the conditional operator. Many people (erroneously) call it the ternary operator, because it's the only ternary (three-argument) operator in Java, C, C++, and probably many other languages. But theoretically there could...
Find and replace - Add carriage return OR Newline
...
If Productivity Power Tools is installed, you can still do ctrl+shit+h and then ctrl+h to open the native Visual Studio Find / Replace window.
– Neb
Dec 21 '15 at 20:43
...
Matlab: Running an m-file from command-line
...bash
matlab -nodisplay -nojvm -nosplash -nodesktop -r \
"try, run('/foo/bar/my_script.m'), catch, exit(1), end, exit(0);"
echo "matlab exit code: $?"
it prints matlab exit code: 1 if the script throws an exception, matlab exit code: 0 otherwise.
...
What is the difference between a URI, a URL and a URN?
...tion"). The term "Uniform Resource Name"
(URN) has been used historically to refer to both URIs under the
"urn" scheme [RFC2141], which are required to remain globally unique
and persistent even when the resource ceases to exist or becomes
unavailable, and to any other URI with ...
How can I make my own event in C#?
...event and a field to keep track of subscribers:
public event EventHandler Foo;
If you need more complicated subscription/unsubscription logic, you can do that explicitly:
public event EventHandler Foo
{
add
{
// Subscription logic here
}
remove
{
// Unsubscrip...
In a URL, should spaces be encoded using %20 or +? [duplicate]
... theory I think you should have %20 before the ? and + after:
example.com/foo%20bar?foo+bar
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How does PHP 'foreach' actually work?
...r the simplest case is Traversable objects, as for these foreach is essentially only syntax sugar for code along these lines:
foreach ($it as $k => $v) { /* ... */ }
/* translates to: */
if ($it instanceof IteratorAggregate) {
$it = $it->getIterator();
}
for ($it->rewind(); $it->v...
Implementing two interfaces in a class with same method. Which interface method is overridden?
...where you need to implement two Colliding Interface, say Foo and Bar. Basically you have your class implement one of the interfaces, say Foo, and provide a Bar asBar() method to return an inner class that implements the second Bar interface. Not perfect since your class is ultimately not "a Bar", bu...
Why do we use Base64?
...omputing.
Computers communicate in binary - 0s and 1s - but people typically want to communicate with more rich forms data such as text or images. In order to transfer this data between computers it first has to be encoded into 0s and 1s, sent, then decoded again. To take text as an example - the...