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Fast way of counting non-zero bits in positive integer
I need a fast way to count the number of bits in an integer in python.
My current solution is
9 Answers
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Should I make HTML Anchors with 'name' or 'id'?
...identifier:
For HTML documents (and the text/html MIME type), the following processing model must be followed to determine what the indicated part of the document is.
Parse the URL, and let fragid be the <fragment> component of the URL.
If fragid is the empty string, then the...
Encrypting & Decrypting a String in C# [duplicate]
...s constant is used to determine the keysize of the encryption algorithm in bits.
// We divide this by 8 within the code below to get the equivalent number of bytes.
private const int Keysize = 256;
// This constant determines the number of iterations for the password bytes g...
what is faster: in_array or isset? [closed]
...as testing while and foreach that at each refresh I was getting different "winners". it always depend on too many server variables, and the best is to iterate a very large number of times on different times and get the one that win more often, or just know what happening in the background and know ...
How do I detect unsigned integer multiply overflow?
...ion is likely to overflow, using the positions of the most-significant one-bits in the operands and a little basic binary-math knowledge.
For addition, any two operands will result in (at most) one bit more than the largest operand's highest one-bit. For example:
bool addition_is_safe(uint32_t a, ...
Referencing system.management.automation.dll in Visual Studio
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I've installed the SDK on 2 different 64-bit machines (with difficulty) and found the version 6.2.8229.0, 4.66MB dll on only 1, and only in c:\program files (x86)\reference assemblies\microsoft\windowspowershell\v1.0. I highly recommend editing the .csproj file, or...
How can I configure the font size for the tree item in the package explorer in Eclipse?
...nswered Apr 6 '12 at 16:31
Rick WinscotRick Winscot
58144 silver badges22 bronze badges
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Why does the C preprocessor interpret the word “linux” as the constant “1”?
...NT_LEAST8_TYPE__ unsigned char
#define __INTMAX_C(c) c ## L
#define __CHAR_BIT__ 8
#define __UINT8_MAX__ 255
#define __WINT_MAX__ 2147483647
#define __ORDER_LITTLE_ENDIAN__ 1234
#define __SIZE_MAX__ 18446744073709551615UL
#define __WCHAR_MAX__ 2147483647
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_1 1
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Why is SSE scalar sqrt(x) slower than rsqrt(x) * x?
...iplication, where my answer has a section on why rcpps is not a throughput win anymore. (Or a latency win), and numbers on divide throughput/latency.
– Peter Cordes
Apr 25 '18 at 11:38
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Importing modules from parent folder
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See also the following answer, since adding __init__.py is not the only thing you have to do: stackoverflow.com/questions/11536764/…
– Ben Farmer
Oct 28 '15 at 7:45
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