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What's the difference between “groups” and “captures” in .NET regular expressions?
...hat
each Group object contains a
collection of Captures representing
all the intermediary matches by the
group during the match, as well as the
final text matched by the group.
And a few pages later, this is his conclusion:
After getting past the .NET
documentation and actually
...
What are the advantages of using nullptr?
This piece of code conceptually does the same thing for the three pointers (safe pointer initialization):
7 Answers
...
Convert number to month name in PHP
...
The recommended way to do this:
Nowadays, you should really be using DateTime objects for any date/time math. This requires you to have a PHP version >= 5.2. As shown in Glavić's answer, you can use the following:
$monthNum = 3;
$dateObj = DateTime::createFromFormat('!m',...
What does enumerable mean?
...his condition is in place because objects have many more properties, especially from inheritance:
console.log(Object.getOwnPropertyNames(Object.prototype));
// ["constructor", "toString", "toLocaleString", "valueOf", "hasOwnProperty", "isPrototypeOf", "propertyIsEnumerable", /* etc. */]
Each of t...
Big O, how do you calculate/approximate it?
..., but be warned that this topic takes my students a couple of months to finally grasp. You can find more information on the Chapter 2 of the Data Structures and Algorithms in Java book.
There is no mechanical procedure that can be used to get the BigOh.
As a "cookbook", to obtain the BigOh from ...
Value Change Listener to JTextField
...
Add a listener to the underlying Document, which is automatically created for you.
// Listen for changes in the text
textField.getDocument().addDocumentListener(new DocumentListener() {
public void changedUpdate(DocumentEvent e) {
warn();
}
public void removeUpdate(DocumentE...
CSS center text (horizontally and vertically) inside a div block
...al align".
Since they tend to be hacks or adding complicated divs... I usually use a table with a single cell to do it... to make it as simple as possible.
Update for 2020:
Unless you need make it work on earlier browsers such as Internet Explorer 10, you can use flexbox. It is widely supported...
Daylight saving time and time zone best practices [closed]
...hanged from the original value recorded.
When scheduling future events, usually local time is preferred instead of UTC, as it is common for the offset to change. See answer, and blog post.
When storing whole dates, such as birthdays and anniversaries, do not convert to UTC or any other time zone.
...
Is there a format code shortcut for Visual Studio?
...s, e.g. I have set Add/remove braces for single-line control statements (really bad description because the user has no idea what happens when you activate it^^) so the formatter always changes if(foo) bar; to if(foo) { bar; }. executing Edit.FormatSelection doesn’t change that. Might be a bug, go...
Can't operator == be applied to generic types in C#?
...perator ==(Test a, Test b)
{
Console.WriteLine("Overloaded == called");
return a.Equals(b);
}
public static bool operator !=(Test a, Test b)
{
Console.WriteLine("Overloaded != called");
return a.Equals(b);
}
}
}
Output
Inline:
Overloaded == c...