Yes, perlrocks, perl rocks!

But glob is a re-implementation of csh's glob! ;)

But that is one of Perl's strengths. It took the best of everything^* that was out there, and stole it :-)

^*Apart from it's object system, obviously :-(

Thanks FunkyMonk. But since glob is returning the whole list, and my list can be huge, i'm running out of memory. I would much rather have a way that generate one combination at a time where i'd choose whether to save it or not before getting the other combination. Looping would be great as opposed to returning the whole list at once.

Any ideas?

Thanks a lot

To understand it, read the man page for glob. Then understand the following:

print "$_\n" for glob "{0,1}"; # 0 1
print "$_\n" for glob "{0,1}{0,1}"; # 00 01 10 11
print "$_\n" for glob "{0,1}{0,1}{0,1}"; # 000 001 010 011 100 101 110
+ 111
[download]

Then read up on the repetition operator in perlop, and understand:

print "AB" x 1; # AB
print "AB" x 2; # ABAB
print "AB" x 3; # ABABAB
[download]

To use it to create keys in a hash, use something like

use Data::Dumper;
my %hash = map { $_ => 1 } glob "{0,1}" x 3;
print Dumper \%hash;
__END__
$VAR1 = {
          '011' => 1,
          '010' => 1,
          '111' => 1,
          '000' => 1,
          '101' => 1,
          '001' => 1,
          '100' => 1,
          '110' => 1
        };
[download]

---

Unless I state otherwise, all my code runs with strict and warnings

Yes. Iterate over the results and use each result as a key.

I figured that but the thing is that i don't know how and where the results are stored. I read about glob but that confused me more!!