You are right. I missed the fact that each element in the comment (is it really a comment?) ticks over indvidually.

The good news is that it's easy enough to modify my code to support that behavior.

my @current_version = split_version($old_version);
my @commands = map {
    if( $updated[$_]) {
            # did we update this field?
        my $current_version = join '.', @current_version;
        $current_version[$_] = $new_version[$_];
        update_aht_command(   # if so, generate a command
            (KEYWORDS)[$_], 
            $new_version[$_], 
            "#DBVersion=$current_version",
         )
    }
    else {     # otherwise put nothing in the command list. 
         ();
    }
} VERSION_ELEMENTS;
[download]

The bad news is that I've now got code with side-effects in my map block. Yuck.

So in this case I'd probably refactor and use a foreach to iterate my arrays.

my @current_version = split_version($old_version);
my @commands;
foreach my $part ( VERSION_ELEMENTS ) {
    if( $updated[$part]) {    # did we update this field?
        
        my $current_version = join '.', @current_version;

        $current_version[$part] = $new_version[$part];

        push @commands, update_aht_command( 
            (KEYWORDS)[$part], 
            $new_version[$part], 
            "#DBVersion=$current_version",
         )
    }
}
[download]

Warning: I edited this code in the text box on this page and I haven't tested it, it probably has typos, fleas and other bugs.