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Re: Puzzle: need a more general algorithm

by fglock (Vicar)
on Jul 08, 2002 at 20:42 UTC ( #180319=note: print w/replies, xml ) Need Help??

in reply to Puzzle: need a more general algorithm

If you want to generate all possible combinations, you could use this algorithm:

$categories = 5; $columns = 3; $a = join('#', 0..$categories); @columns = (); &check_columns ($a, @columns); sub check_columns { my $cat = shift; my @columns = @_; my $size = split('#', $cat)-1; foreach (1.. $size ) { my ($first, $second) = $cat =~ /^((?:.*?#){$_})(.*?)$/; $first =~ s/#$//; my @result = ($first, $second, @columns); if ($#result == $columns) { print join(" ", @result), "\n", } else { check_columns(@result); } } }

It generates this list of indexes, from which you can choose the best line:

0 1 2 3#4#5 0 1 2#3 4#5 0 1#2 3 4#5 0#1 2 3 4#5 0 1 2#3#4 5 0 1#2 3#4 5 0#1 2 3#4 5 0 1#2#3 4 5 0#1 2#3 4 5 0#1#2 3 4 5

I used an array of strings instead of an array of arrays because it is easier to debug.

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[Corion]: thezip: If you want to confuse your users, use system(1, "that\\command" );, which will make Perl launch it in the background
[Corion]: That will keep the console window open even though the user can't type into it anymore
[thezip]: So I have a script that generates a log file. After script completion, I want tohave VIM open this logfile.
[thezip]: i don't get the command line "back" until I close VIM. No what I want to happen...
[thezip]: I currently don't have access to CYGWIN, else I'd just do a tail -f on the logfile.
[Corion]: thezip: If you want to open vim and can live with opening a second console window, use start "The results" vim.exe c:\path\to\logfile .log
[thezip]: Ooops... I lied. I guess Cygwin is back. I'll just do a tail -f instead. Better. Sorry for the noise.

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