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What is the fastest/most efficient way to find the highest set bit (msb) in an integer in C?
...x=0, without changing the output for any other input.
To avoid needing to do that, your other option is platform-specific intrinsics like ARM GCC's __clz (no header needed), or x86's _lzcnt_u32 on CPUs that support the lzcnt instruction. (Beware that lzcnt decodes as bsr on older CPUs instead of f...
When should I use a composite index?
...you're always querying two dimensions, a composite index is the way to go, doesn't really matter which is first (most probably).
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Can I use break to exit multiple nested 'for' loops?
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AFAIK, C++ doesn't support naming loops, like Java and other languages do. You can use a goto, or create a flag value that you use. At the end of each loop check the flag value. If it is set to true, then you can break out of that it...
Executing Batch File in C#
I'm trying to execute a batch file in C#, but I'm not getting any luck doing it.
12 Answers
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Are +0 and -0 the same?
...ise we would have to take this into account in our code and I, personally, don't want to do that ;)
Note:
ES2015 introduces a new comparison method, Object.is. Object.is explicitly distinguishes between -0 and +0:
Object.is(-0, +0); // false
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What is a MIME type?
...ns, is provided, please explain in clear and simple words. What is it? Why do plug-ins have a MIME type?
5 Answers
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Python: fastest way to create a list of n lists
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is
from itertools import repeat
d = [[] for i in repeat(None, n)]
It does not have to create a new int object in every iteration and is about 15 % faster on my machine.
Edit: Using NumPy, you can avoid the Python loop using
d = numpy.empty((n, 0)).tolist()
but this is actually 2.5 times sl...
Convert a JSON string to object in Java ME?
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Does jsonSimple still have the JSONParser class? I can't call the class.
– phuwin
Jul 5 '16 at 14:35
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Fragments within Fragments
...id.com/about/versions/android-4.2.html#NestedFragments
NOTE (as per this docs): "Note: You cannot inflate a layout into a fragment when that layout includes a <fragment>. Nested fragments are only supported when added to a fragment dynamically."
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Using varchar(MAX) vs TEXT on SQL Server
...ed with = and GROUP BY as any other VARCHAR column can be. However, if you do have a lot of data you will have a huge performance issue using these methods.
In regard to if you should use LIKE to search, or if you should use Full Text Indexing and CONTAINS. This question is the same regardless of V...