On 21 Feb 2005 06:48:19 -0500, rumours say that Dan Sommers <[EMAIL PROTECTED]> might have written:
[snip: snacktime posts code to count bits]
Seems to work, is there a better way to do this?
[Dan]
for c in range( 128 ): even_odd = 0 print '%3d' % c, while c: c &= c - 1 even_odd = not even_odd print int( even_odd )
Just for the sake of people who haven't messed with bit manipulation in C or assembly, the effect of
c &= c - 1
is to reset the rightmost (less significant) '1' bit of a number (ie change it to '0').
i tried c &= c - 1 but i'm not getting the least significant or rightmost bit reset to zero. am i misunderstanding something?
>>> 2 & 1 # 2 = 0x10; reset right most would be 0x10 0 >>> 10 & 9 # 10 = 0x1010; reset right most would be 0x1010 8
bryan
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