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Java Regex Capturing Groups
...matcher = pattern.matcher(line);
while (matcher.find()) {
System.out.println("group 1: " + matcher.group(1));
System.out.println("group 2: " + matcher.group(2));
System.out.println("group 3: " + matcher.group(3));
}
Output:
group 1: This order was placed for QT
group 2: 3000
group 3:...
What is the Python equivalent of Matlab's tic and toc functions?
..._exit__(self, type, value, traceback):
if self.name:
print('[%s]' % self.name,)
print('Elapsed: %s' % (time.time() - self.tstart))
It can be used as a context manager:
with Timer('foo_stuff'):
# do some foo
# do some stuff
Sometimes I find this technique more c...
Examples of GoF Design Patterns in Java's core libraries
...ng the factory itself which in turn can be used to create another abstract/interface type)
javax.xml.parsers.DocumentBuilderFactory#newInstance()
javax.xml.transform.TransformerFactory#newInstance()
javax.xml.xpath.XPathFactory#newInstance()
Builder (recognizeable by creational methods returning t...
What is null in Java?
...that could've been avoided. Some say that in a language that catches NullPointerException like Java, it's good to use it because you will fail-fast on programmer errors. Some people avoid null by using Null object pattern, etc.
This is a huge topic on its own, so it's best discussed as answer to an...
Why do I want to avoid non-default constructors in fragments?
...ple your Category object). Be careful, you can't pass this object directly into the bundle, unless it's serializable.
I think it's better to build your object in the fragment, and put only an id or something else into bundle. This is the code to create and attach a bundle:
Bundle args = new Bundle(...
What is the easiest way to remove the first character from a string?
... something guaranteeded to be higher than length, like, str[1,999999] (use int_max of course) to get the whole tail. [1..-1] is cleaner and probably faster, since you don't need to operate on length manually (see the [1..length] in the benchmark)
– quetzalcoatl
...
Is returning by rvalue reference more efficient?
...rn Beta_ab(1, 1);
}
Now, it's properly moving a temporary Beta_ab object into the return value of the function. If the compiler can, it will avoid the move altogether, by using RVO (return value optimization). Now, you can do the following
Beta_ab ab = others.toAB();
And it will move construct ...
Best way to define private methods for a class in Objective-C
...one OS 2.0, and later) you can create a category with an empty name (i.e. @interface MyClass ()) called Class Extension. What's unique about a class extension is that the method implementations must go in the same @implementation MyClass as the public methods. So I structure my classes like this:
I...
How do I break out of a loop in Perl?
... $thing; while ($thing = shift @array){ last if $thing =~ /[A-Za-z]/; } print($thing); # "apple"
– HoldOffHunger
Jul 17 '18 at 19:06
...
How do you remove a Cookie in a Java Servlet
...domain, you'll still see the cookie sent to the client.
To debug this, go into Firefox's preferences -> Security tab, and search for all cookies with the SSO_COOKIE_NAME. Click on each to see the domain and path. I'm betting you'll find one in there that's not quite what you're expecting.
...