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 );
}

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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

In reply to Re: Modules: Building blocks for the Daft Adventure by Masem
in thread Modules: Building blocks for the Daft Adventure by Tiefling

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