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boost::flat_map and its performance compared to map and unordered_map
It is common knowledge in programming that memory locality improves performance a lot due to cache hits. I recently found out about boost::flat_map which is a vector based implementation of a map. It doesn't seem to be nearly as popular as your typical map / unordered_map so I haven't been able ...
What really happens in a try { return x; } finally { x = null; } statement?
I saw this tip in another question and was wondering if someone could explain to me how on earth this works?
5 Answers
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In Django, how does one filter a QuerySet with dynamic field lookups?
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Python's argument expansion may be used to solve this problem:
kwargs = {
'{0}__{1}'.format('name', 'startswith'): 'A',
'{0}__{1}'.format('name', 'endswith'): 'Z'
}
Person.objects.filter(**kwargs)
This is a very common and use...
Is AngularJS just for single-page applications (SPAs)?
...rying to evaluate a tool that will work for us and give us the best platform to move forward.
5 Answers
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How can I exclude some folders from my Eclipse project?
I'm adding an eclipse project to our existing code-base, and I'd like to know if there is a way to exclude some directories from being picked up by eclipse at all? The reason is that we have a huge "third-party" directory in our repository that cannot be present in the project for the pair-program...
Can I pass an array as arguments to a method with variable arguments in Java?
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The underlying type of a variadic method function(Object... args) is function(Object[] args). Sun added varargs in this manner to preserve backwards compatibility.
So you should just be able to prepend extraVar to args and call String.format(format, args).
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How do I “git blame” a deleted line?
git blame is great for modified and added lines, but how can I find when a line that existed in a specific previous commit was eventually deleted. I'm thinking bisect , but I was hoping for something handier.
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How to make an array of arrays in Java
...rray2, array3, array4, array5 };
(The latter syntax can be used in assignments other than at the point of the variable declaration, whereas the shorter syntax only works with declarations.)
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64-bit version of Boost for 64-bit windows
Is there a version of 64-bit Boost library for VS2008 ?
Or do I have to compile one myself? if, so, does anyone have experience with it?
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Using @include vs @extend in Sass?
...Sass, I can't quite discern the difference between using @include with a mixin and using @extend with a placeholder class. Don't they amount to the same thing?
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