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Is the C# static constructor thread safe?
... {
mutex.WaitOne();
return instance;
}
// Each call to Acquire() requires a call to Release()
public static void Release()
{
mutex.ReleaseMutex();
}
}
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std::shared_ptr of this
...e_shared_from_this just for this purpose. You inherit from it and you can call .shared_from_this() from inside the class. Also, you are creating circular dependencies here that can lead to resource leaks. That can be resolved with the use of std::weak_ptr. So your code might look like this (assuming...
Can I add a UNIQUE constraint to a PostgreSQL table, after it's already created?
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@Jasen That's totally clear. Just wanted to emphasize that the answer "But if you have non-unique entries on your table. Here is the how to add unique constraint on your table." will not work. Non-unique entries must of course always be conso...
Eclipse: How do you change the highlight color of the currently selected method/expression?
...f this highlight, but after scouring the eclipse preferences many times in all 3 places, I have yet to find it.
5 Answers
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Check if a Postgres JSON array contains a string
...nswered Nov 26 '14 at 8:16
SnowballSnowball
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express.js - single routing handler for multiple routes in a single line
Is there a way to make this on a single function call?
6 Answers
6
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Initializing a member array in constructor initializer
...hing. I'm not exactly sure about the following case, but some compilers do allow it.
struct A {
char foo[6];
A():foo("hello") { } /* valid? */
};
See this GCC PR for further details.
Do C++0x initializer lists solve the problem?
Yes, they do. However your syntax is invalid, I think. Y...
How to force LINQ Sum() to return 0 while source collection is empty
Basically when I do the following query, if no leads were matched the following query throws an exception. In that case I'd prefer to have the sum equalize 0 rather than an exception being thrown.
Would this be possible in the query itself - I mean rather than storing the query and checking query.A...
jquery $(window).width() and $(window).height() return different values when viewport has not been r
I am writing a site using jquery that repeatedly calls $(window).width() and $(window).height() to position and size elements based on the viewport size.
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How to use timeit module
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The way timeit works is to run setup code once and then make repeated calls to a series of statements. So, if you want to test sorting, some care is required so that one pass at an in-place sort doesn't affect the next pass with already sorted data (that, of course, would make the Timsort reall...