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Should functions return null or an empty object?
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What does android:layout_weight mean?
I don't understand how to use this attribute. Can anyone tell me more about it?
13 Answers
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Regex lookahead for 'not followed by' in grep
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Negative lookahead, which is what you're after, requires a more powerful tool than the standard grep. You need a PCRE-enabled grep.
If you have GNU grep, the current version supports options -P or --perl-regexp and you can then use the regex you wanted.
If you don't have (a suffic...
When and why would you seal a class?
...s security features, so that the original object cannot be "impersonated".
More generally, I recently exchanged with a person at Microsoft, who told me they tried to limit the inheritance to the places where it really made full sense, because it becomes expensive performance-wise if left untreated. ...
How well is Unicode supported in C++11?
...ink all but the first one provide terrible support. I'll get back to it in more detail after a quick detour through your other questions.
Does std::string do what it should?
Yes. According to the C++ standard, this is what std::string and its siblings should do:
The class template basic_s...
Split Java String by New Line
...y '\n'; its Views completely ignore '\r'. But if you're going to look for more than one kind of separator, you might as well look for all three: "\r?\n|\r".
– Alan Moore
Jan 18 '09 at 18:02
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PHP Function with Optional Parameters
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There is more that can be done that just the "use an array" suggestion - take a look at Walf's answer to a similar question and the more in-depth example in the same thread
– DJDave
Mar 16 '16 at...
Random number generation in C++11: how to generate, how does it work? [closed]
...action would be to take rand() % 3. But wait, the remainders 0 and 1 occur more often than the remainder 2, so this isn't correct!
This is why we need proper distributions, which take a source of uniform random integers and turn them into our desired distribution, like Uniform[0,2] in the example. ...
How do I properly force a Git push?
... @Jeewes But with Git 2.0, the default is safer, or at least it's no more dangerous than git push origin master --force is.
– user456814
Aug 12 '14 at 14:24
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Which MySQL data type to use for storing boolean values
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Going for char, in PHP at least, will lead to more code as !$boolean will never evaluate properly without further processing.
– Mild Fuzz
Jun 1 '11 at 20:58
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