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•Re: Re: •Re: Puzzle: need a more general algorithm

by merlyn (Sage)
on Jul 12, 2002 at 19:39 UTC ( #181383=note: print w/ replies, xml ) Need Help??

in reply to Re: •Re: Puzzle: need a more general algorithm
in thread Puzzle: need a more general algorithm

As we discussed in that meeting, here's the code snippet I was thinking about to generate the binary strings:
print map "$_\n", strings_for(6, 4); sub strings_for { my ($cats, $cols) = @_; $cats--; $cols--; my @ret; for (0..(1 << $cats) - 1) { my $bitstring = substr(unpack("B*", pack "N", $_), -$cats); next unless $bitstring =~ tr/1// == $cols; push @ret, $bitstring; } @ret; }

-- Randal L. Schwartz, Perl hacker

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