foreach $k(sort {$match{$a}<=>$match{$b}} keys %match}

I get an error, "Can't use "my $b" in sort comparison at D:\db\New\est_keywords.pl line 41."

##</code><code>##

	foreach $word(sort byval keys %match)
	{
		if ($match{$word} < 3) {next;}
		print "$word\t$match{$word}\n";
	}
}

sub byval
{
	return $match{$b} <=> $match{$a};
}