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Re: Which bit is set? (inverse of (1<<$value) operator)

by grizzley (Chaplain)
on Sep 17, 2012 at 11:17 UTC ( #994014=note: print w/ replies, xml ) Need Help??


in reply to Which bit is set? (inverse of (1<<$value) operator)

In description of unpack there is following method to count number of bits:

# Count the bits in a chunk of memory (e.g. a select vector) unpack( '%32b*', $mask );
Update: sorry, I misunderstood question. If you have string of bits with one bit set, then you could try just $bitstring =~ /1(0*)$/; $originalvalue = length($1)+1;


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Re^2: Which bit is set? (inverse of (1<<$value) operator)
by wirito (Acolyte) on Sep 17, 2012 at 12:13 UTC
    Nope, it's a two-byte int, not a strings filled with 0's and 1's.

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