Right idea: you probably are meaning to use coderefs.

The way I've been using coderefs is as follows:

sub do_stat {
    my ( $dice, $mod ) = @_;
    my $roll = RPG::Dice::roll ( $dice );
    return &$mod( $roll );
}
[download]

That is, the &$mod is a function call of a deref'ed coderef. To actually call this, you can do it by one of two ways:

# anonymous function call
my $roll = do_stat( "3d6", sub { int($_[0]/2)-5; } );

# Named function call
sub modify { int($_[0]/2)-5; }
my $roll2 = do_stat( "3d6, \&modify );
[download]

(The \& here creates a reference to the function modify).

What's nice about coderefs is that they then can be used as variables, and allow you to quickly do different functions depending on what you pass:

my @data = ( { name => 'STR',
               dice => '3d6',
               modifier => sub { $_[0] + 2 }
             },
             { name => 'INT',
               dice => '3d6',
               modifier => sub { $_[0] - 5 }
             }
            );

foreach ( @data ) {
    $_->{ roll } = 
        &{ $_->{ modifier } }( RPG::Dice::roll( $_->{ dice } ) );
}
[download]

</CODE>

---

Dr. Michael K. Neylon - mneylon-pm@masemware.com || "You've left the lens cap of your mind on again, Pinky" - The Brain

---

---

• Are you posting in the right place? Check out Where do I post X? to know for sure.
• Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:

  <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>

• Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
• Want more info? How to link or How to display code and escape characters are good places to start.