$file !~ m/^[\w-]+(\.[\w-]+)*$/ 

##</code><code>##

cns061206

##</code><code>##

sub zip {
    (my $cmd, my $dir) = @_[0,1];

    my $count;

    if($cmd eq 'unzip') {
        
        foreach my $file (glob($dir . '/*.gz')){ # get only gzipped files
                if(system(($cmd, $file)) == 0) {
                    $count++;
                }
                else {
                    warn "Could not $cmd $file\n";
                }
            }
        return $count;
    }
    elsif($cmd eq 'zip') {
        foreach my $file (glob($dir . '/*')) {
            next if $file =~ /\.gz$/;
            next if $file =~ /\.txt$/;
            next unless $file =~ /(\.\w+)+$/; # which will skip files without an extension
            if(system(($cmd, $file)) == 0){
                $count++;
            }
            else {
                warn "Could not $cmd $file\n";
            }
        }
        return $count;
    }
    else {
        warn "Unknown command $cmd\n";
    }
}


##</code><code>##

foreach my $file (glob($dir . '/*')) {

##</code><code>##

foreach my $file (glob($dir . '/*.gz'))

##</code><code>##

my @list = glob($dir . '/*');
foreach my $file (@list) {

##</code><code>##

my @list = glob($dir . '/*.gz');
foreach my $file (@list) {