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Fast way of counting non-zero bits in positive integer

...alf again as much time). On the other hand, gmpy popcount() took about 1/20th of the time of bin(n).count("1"). So if you can install gmpy, use that. To answer a question in the comments, for bytes I'd use a lookup table. You can generate it at runtime: counts = bytes(bin(x).count("1") for x in r...
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Benchmarking (python vs. c++ using BLAS) and (numpy)

... | edited Sep 30 '11 at 18:19 answered Sep 30 '11 at 18:00 ...
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How to uninstall the “Microsoft Advertising SDK” Visual Studio extension?

One of the extensions listed in Visual Studio (2012 for me) is the "Microsoft Advertising SDK for Windows 8.1". I like to uninstall extensions I don't need, but this one won't allow me. if I hover the (enabled!) button it says in a tooltip: ...
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Finding the Eclipse Version Number

... 104 (Update September 2012): MRT points out in the comments that "Eclipse Version" question refere...
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Does JavaScript guarantee object property order?

... 507 The iteration order for objects follows a certain set of rules since ES2015, but it does not (a...
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Can virtual functions have default parameters?

... this. Some compilers may do something different, but this is what the C++03 and C++11 Standards say: 8.3.6.10: A virtual function call (10.3) uses the default arguments in the declaration of the virtual function determined by the static type of the pointer or reference denotin...
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Creating an array of objects in Java

...e this: a1 = new A(); Similarly, with the array you need to do this: a[0] = new A(); ...before using it. share | improve this answer | follow | ...
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How do I detect “shift+enter” and generate a new line in Textarea?

...olution below is better I suggest using that: https://stackoverflow.com/a/6015906/4031815 My solution I think you can do something like this.. EDIT : Changed the code to work irrespective of the caret postion First part of the code is to get the caret position. Ref: How to get the caret co...
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Javascript Array of Functions

...hen you want to execute a given function in the array: array_of_functions[0]('a string'); share | improve this answer | follow | ...
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Programmatically Request Access to Contacts

... 180 As per this documentation on apple's site (scroll down to Privacy in the middle of the page), ac...