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How does C compute sin() and other math functions?
... this is the code that actually runs when you call sin() on a typical x86-64 Linux system. It is apparently faster than the fsin assembly instruction. Source code: sysdeps/ieee754/dbl-64/s_sin.c, look for __sin (double x).
This code is very complex. No one software algorithm is as fast as possible ...
quick random row selection in Postgres
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edited Nov 13 '15 at 4:28
Antony Hatchkins
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How to convert DateTime to VarChar
...nyOssaTonyOssa
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RGB to hex and hex to RGB
... @cwolves:
function rgbToHex(r, g, b) {
return "#" + ((1 << 24) + (r << 16) + (g << 8) + b).toString(16).slice(1);
}
alert(rgbToHex(0, 51, 255)); // #0033ff
Update 3 December 2012
Here's a version of hexToRgb() that also parses a shorthand hex triplet such as "#...
Fastest way to replace NAs in a large data.table
...m.time(a_gdata = f_gdata(dt1))
user system elapsed
18.805 12.301 134.985
system.time(a_andrie = f_andrie(dt1))
Error: cannot allocate vector of size 305.2 Mb
Timing stopped at: 14.541 7.764 68.285
system.time(f_dowle(dt1))
user system elapsed
7.452 4.144 19.590 # EDIT has fas...
Php multiple delimiters in explode
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answered Feb 10 '11 at 9:45
SergeSSergeS
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How do I check for C++11 support?
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edited Jul 4 '15 at 19:24
Iharob Al Asimi
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Unable to load DLL (Module could not be found HRESULT: 0x8007007E)
I have dll library with unmanaged C++ API code I need to use in my .NET 4.0 application. But every method i try to load my dll i get an error:
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Integer division with remainder in JavaScript?
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The integral part of -4.5 in mathematics is -5, as -5 is the "highest possible integral number that is still lower than -4.5".
– Toughy
Dec 3 '14 at 13:40
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How can I hide an HTML table row so that it takes up no space?
... CalvinCalvin
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