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What integer hash function are good that accepts an integer hash key?
...
Knuth's multiplicative method:
hash(i)=i*2654435761 mod 2^32
In general, you should pick a multiplier that is in the order of your hash size (2^32 in the example) and has no common factors with it. This way the hash function covers all your hash space uniformly.
Edit: The biggest...
Can't start Eclipse - Java was started but returned exit code=13
...f OS, JDK and Eclipse bitness. In my case, I was using a 64-bit JDK with a 32-bit Eclipse on a 64-bit OS. After downgrading the JDK to 32-bit, Eclipse started working.
Use one of the following combinations.
32-bit OS, 32-bit JDK, 32-bit Eclipse (32-bit only)
64-bit OS, 32-bit JDK, 32-bit Eclipse
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NSLog/printf specifier for NSInteger?
A NSInteger is 32 bits on 32-bit platforms, and 64 bits on 64-bit platforms. Is there a NSLog specifier that always matches the size of NSInteger ?
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Why in C++ do we use DWORD rather than unsigned int? [duplicate]
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@Milhous: According to the documentation, it is 32 bits: msdn.microsoft.com/en-us/library/cc230318.aspx.
– GManNickG
Sep 9 '14 at 15:13
add a commen...
Eclipse returns error message “Java was started but returned exit code = 1”
...file :
--clean
-startup
plugins/org.eclipse.equinox.launcher_1.3.0.v20130327-1440.jar
--launcher.library
plugins/org.eclipse.equinox.launcher.win32.win32.x86_1.1.200.v20130807-1835
-product
org.eclipse.epp.package.jee.product
--launcher.defaultAction
openFile
--launcher.XXMaxPermSize
256M
-showspl...
How to list all properties of a PowerShell object
When I look at the Win32_ComputerSystem class , it shows loads of properties like Status , PowerManagementCapabilities , etc. However, when in PowerShell I do the below I only get back a couple:
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How do I check OS with a preprocessor directive?
.... Here are a few of them, with links to where they're found:
Windows
_WIN32 Both 32 bit and 64 bit
_WIN64 64 bit only
Unix (Linux, *BSD, Mac OS X)
See this related question on some of the pitfalls of using this check.
unix
__unix
__unix__
Mac OS X
__APPLE__
__MACH__
Both are define...
Compile time string hashing
...is is a little bit late, but I succeeded in implementing a compile-time CRC32 function with the use of constexpr. The problem with it is that at the time of writing, it only works with GCC and not MSVC nor Intel compiler.
Here is the code snippet:
// CRC32 Table (zlib polynomial)
static constexpr ...
In Visual Studio C++, what are the memory allocation representations?
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322
This link has more information:
http://en.wikipedia.org/wiki/Magic_number_(programming)
* 0...
unsigned int vs. size_t
...M. Brandenburg
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answered Sep 25 '08 at 7:08
Remo.DRemo.D
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