Beefy Boxes and Bandwidth Generously Provided by pair Networks
laziness, impatience, and hubris
 
PerlMonks  

•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

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://181383]
help
Chatterbox?
and all is quiet...

How do I use this? | Other CB clients
Other Users?
Others contemplating the Monastery: (9)
As of 2016-12-08 20:41 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    On a regular basis, I'm most likely to spy upon:













    Results (146 votes). Check out past polls.