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What is the fastest/most efficient way to find the highest set bit (msb) in an integer in C?

If I have some integer n, and I want to know the position of the most significant bit (that is, if the least significant bit is on the right, I want to know the position of the furthest left bit that is a 1), what is the quickest/most efficient method of finding out? ...
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Can I call memcpy() and memmove() with “number of bytes” set to zero?

... the length of the array for a function, n can have the value zero on a call to that function. Unless explicitly stated otherwise in the description of a particular function in this subclause, pointer arguments on such a call shall still have valid values, as described in 7.1.4. On such a call...
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How to provide user name and password when connecting to a network share

...rent user (in my case, a network enabled service user) has no rights, name and password have to be provided. 11 Answers ...
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How to hide “Showing 1 of N Entries” with the dataTables.js library

... This is a better answer than mine, if all you want to do is hide it. If you need to style it, its nice that Allan has wrapped each element in it's own class so you can get at it. – Daiku Oct 18 '13 at 11:54 ...
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How to run code when a class is subclassed? [duplicate]

...- Watcher subclasses type, not object. 2 - SuperClass has no superclass at all, not object. I'm just so used to writing down object as a superclass for every class I defined that I somehow missed it that this code was using something else. Although there doesn't seem to be any harm in making SuperCl...
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ObjectiveC Parse Integer from String

I'm trying to extract a string (which contains an integer) from an array and then use it as an int in a function. I'm trying to convert it to a int using intValue. ...
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Unmangling the result of std::type_info::name

... information about the calling function. This should be relatively easy, standard C++ has a type_info class. This contains the name of the typeid'd class/function/etc. but it's mangled. It's not very useful. I.e. typeid(std::vector<int>).name() returns St6vectorIiSaIiEE . ...
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Initializing a list to a known number of elements in Python [duplicate]

...st thing that comes to mind for me is: verts = [None]*1000 But do you really need to preinitialize it? share | improve this answer | follow | ...
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How to upload a file in Django? [closed]

... Phew, Django documentation really does not have good example about this. I spent over 2 hours to dig up all the pieces to understand how this works. With that knowledge I implemented a project that makes possible to upload files and show them as list. To...
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Static variables in JavaScript

... If you come from a class-based, statically typed object-oriented language (like Java, C++ or C#) I assume that you are trying to create a variable or method associated to a "type" but not to an instance. An example using a "classical" approach, with constructor ...