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Efficient Algorithm for Bit Reversal (from MSB->LSB to LSB->MSB) in C
... >> 8) | ((x & 0x00ff00ff) << 8));
return((x >> 16) | (x << 16));
}
From the famous Bit Twiddling Hacks page:
Fastest (lookup table):
static const unsigned char BitReverseTable256[] =
{
0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0, 0x10, 0x90, 0x50, 0xD0, 0x...
Cleaner way to update nested structures
...nymretronym
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When should I use GET or POST method? What's the difference between them?
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It's not a matter of security. The HTTP protocol defines GET-type requests as being idempotent,...
How can I custom-format the Autocomplete plug-in results?
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CheesoCheeso
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e.printStackTrace equivalent in python
...et a string.
– SeldomNeedy
Oct 14 '16 at 4:13
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django: BooleanField, how to set the default value to true?
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edited Jun 2 '19 at 20:56
user8193706
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answered Mar 4 '11 at 6:29
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How to calculate the difference between two dates using PHP?
... calculate different time periods.
$date1 = "2007-03-24";
$date2 = "2009-06-26";
$diff = abs(strtotime($date2) - strtotime($date1));
$years = floor($diff / (365*60*60*24));
$months = floor(($diff - $years * 365*60*60*24) / (30*60*60*24));
$days = floor(($diff - $years * 365*60*60*24 - $months*30*...
Capturing URL parameters in request.GET
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When a URL is like domain/search/?q=haha, you would use request.GET.get('q', '').
q is the par...
Difference between passing array and array pointer into function in C
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First, some standardese:
6.7.5.3 Function declarators (including prototypes)
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7 A declaration of a parameter as ‘‘array of type’’ shall be adjusted to ‘‘qualified pointer to
type’’, where the type qualifiers (if any) are those spec...