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What is the purpose of the “final” keyword in C++11 for functions?
...is the purpose of the final keyword in C++11 for functions? I understand it prevents function overriding by derived classes, but if this is the case, then isn't it enough to declare as non-virtual your final functions? Is there another thing I'm missing here?
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uint8_t vs unsigned char
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It documents your intent - you will be storing small numbers, rather than a character.
Also it looks nicer if you're using other typedefs such as uint16_t or int32_t.
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NullPointerException in Java with no StackTrace
...mization. To get the stack traces back, you need to pass the option -XX:-OmitStackTraceInFastThrow to the JVM.
The optimization is that when an exception (typically a NullPointerException) occurs for the first time, the full stack trace is printed and the JVM remembers the stack trace (or maybe jus...
Visual Studio displaying errors even if projects build
I have a problem with Visual Studio on a C# solution. It displays totally random errors, but the projects build. Right now, I have 33 files with errors, and I can see red squiggly lines in all of them.
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How is null + true a string?
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Bizarre as this may seem, it's simply following the rules from the C# language spec.
From section 7.3.4:
An operation of the form x op y, where op is an overloadable binary operator, x is an expression of type X, and y is an expression of type Y,...
Is “double hashing” a password less secure than just hashing it once?
... a password twice before storage any more or less secure than just hashing it once?
16 Answers
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Is there a way to escape a CDATA end token in xml?
... was wondering if there is any way to escape a CDATA end token ( ]]> ) within a CDATA section in an xml document. Or, more generally, if there is some escape sequence for using within a CDATA (but if it exists, I guess it'd probably only make sense to escape begin or end tokens, anyway).
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Understanding the Gemfile.lock file
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You can find more about it in the bundler website (emphasis added below for your convenience):
After developing your application for a while, check in the application together with the Gemfile and Gemfile.lock snapshot. Now, your repository has a r...
How to wait for a number of threads to complete?
What is a way to simply wait for all threaded process to finish? For example, let's say I have:
13 Answers
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In Django - Model Inheritance - Does it allow you to override a parent model's attribute?
...eate an abstract model representing a "Place", eg. AbstractPlace, and inherit from it:
class AbstractPlace(models.Model):
name = models.CharField(max_length=20)
rating = models.DecimalField()
class Meta:
abstract = True
class Place(AbstractPlace):
pass
class LongNamedRest...