Huh? How do you call it? This runs fine on my machine:
sub find_holes {
my @list = @{ shift() };
@list = sort { $a <=> $b } @list;
my $low = $list[0];
my $high = $list[-1];
my %isthere = map { $_ => 0 } ($low..$high);
$isthere{$_} = "yes" for @list;
my @vacancies = grep { not $isthere{$_} } sort keys %isthere;
return \@vacancies;
}
print "@{find_holes([qw(0 1 2 3 4 6 8)])}\n";
Prints:
d:\tmp\try>perl try.pl
perl try.pl
5 7
d:\tmp\try>
Christian Lemburg
Brainbench MVP for Perl
http://www.brainbench.com
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