Uhm... well forget it, the code is crap. This one does the right thing:
sub idx {
my $lvl = shift; # ARG1: get level
my @out = qw(a1 b1 c1 d1 a2 b2 c2 d2 a3 b3 c3 d3 a4 b4 c4 d4);
# init OUT array
return \@out if($lvl == 1); # bail out if lvl = 1
my @tmp;
for my $o (@out) {
push @tmp, map { "$o$_" } @{&idx($lvl-1)};
}
return \@tmp;
}
Probably I should not do my coding sunday morning.
Marcel
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