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Why does this Java code compile?
...t initializers are within the scope of the variable being declared. So why doesn't int d = d + 1; compile?
The reason is due to Java's rule on definite assignment (JLS §16). Definite assignment basically says that every access to a local variable must have a preceding assignment to that variable, ...
Why does a return in `finally` override `try`?
How does a return statement inside a try/catch block work?
10 Answers
10
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When do I really need to use atomic instead of bool? [duplicate]
...derstanding of the keyword volatile in Java. The volatile keyword in Java does control memory fences but has a very different behavior than the volatile keyword in C which does not. This question explains the difference further.
– Pace
Dec 19 '16 at 19:53
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psql: FATAL: database “” does not exist
...sql -U Username -f create_db.sql this will return error: database Username doesn't exists
– Kostanos
Oct 4 '17 at 16:21
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why does DateTime.ToString(“dd/MM/yyyy”) give me dd-MM-yyyy?
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Escaping the format string using backslash does also work: DateTime.Now.ToString("dd\\/MM\\/yyyy");
– TomB
Jan 30 '15 at 8:42
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Custom Cell Row Height setting in storyboard is not responding
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Beber, does one ALWAYS have to do both (check Custom and edit the Row Height value in storyboard && specify it in the heightForRowAtIndexPath)?
– marciokoko
Dec 20 '12 at 2:12
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Does Python have a package/module management system?
Does Python have a package/module management system, similar to how Ruby has rubygems where you can do gem install packagename ?
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How do I escape ampersands in batch files?
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& is escaped like this: ^& (based on @Wael Dalloul's answer)
% does not need to be escaped
An example:
start http://www.google.com/search?client=opera^&rls=en^&q=escape+ampersand%20and%20percentage+in+cmd^&sourceid=opera^&ie=utf-8^&oe=utf-8
From a batch file
&a...
What does glLoadIdentity() do in OpenGL?
...tity matrix and therefore are not changed, so the matrix has no effect; it does not translate the points, it does not rotate them, it leaves them as-is.
I hope this clarifies a bit more!
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im...
In log4j, does checking isDebugEnabled before logging improve performance?
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Option 2 is better.
Per se it does not improve performance. But it ensures performance does not degrade. Here's how.
Normally we expect
logger.debug(someString);
But usually, as the application grows, changes many hands, esp novice developers, you could...