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What is the rationale behind having companion objects in Scala?
...eton) for a class is needed? Why would I want to create a class, say Foo and also create a companion object for it?
7 Ans...
How does the keyword “use” work in PHP and can I import classes with it?
... consider when your auto loader is loading both classes (does by require), and you are about to use object of class. In this case, the compiler will get confused which class object to load among two. To help the compiler make a decision, you can use the use statement so that it can make a decision w...
How to request a random row in SQL?
How can I request a random row (or as close to truly random as is possible) in pure SQL?
28 Answers
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Remove duplicate elements from array in Ruby
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array = array.uniq
uniq removes all duplicate elements and retains all unique elements in the array.
This is one of many beauties of the Ruby language.
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Fixed size queue which automatically dequeues old values upon new enques
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I would write a wrapper class that on Enqueue would check the Count and then Dequeue when the count exceeds the limit.
public class FixedSizedQueue<T>
{
ConcurrentQueue<T> q = new ConcurrentQueue<T>();
private object lockObject = new object();
public int ...
bodyParser is deprecated express 4
I am using express 4.0 and I'm aware that body parser has been taken out of the express core, I am using the recommended replacement, however I am getting
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How to create Java gradle project
How to create Java Gradle project from command line?
7 Answers
7
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How to store values from foreach loop into an array?
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Declare the $items array outside the loop and use $items[] to add items to the array:
$items = array();
foreach($group_membership as $username) {
$items[] = $username;
}
print_r($items);
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Does python have an equivalent to Java Class.forName()?
I have the need to take a string argument and create an object of the class named in that string in Python. In Java, I would use Class.forName().newInstance() . Is there an equivalent in Python?
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How do I get a file extension in PHP?
...ys think theirs is better because they have a built-in function to do that and not PHP (I am looking at Pythonistas right now :-)).
In fact, it does exist, but few people know it. Meet pathinfo():
$ext = pathinfo($filename, PATHINFO_EXTENSION);
This is fast and built-in. pathinfo() can give you ...