Hi Monks,

This might be a 101 question, but someone has to ask the silly ones. I have a scipt that operates on a global as such...

use a_module;

my $global = a_module->new();

sub func1 {
     $global->do_something1();
}

sub func2 {
     $global->do_something2();
}

$global->do_init;
func1();
func2();
[download]

The problem with this setup is that it is not re-entrant so if I wanted a $global and $global2 i'd have to duplicate everything which is just not on. So I think ok how about rewriting it as follows...

use a_module;

sub func1 {
     my $var = $_[0];
     $var->do_something1();
}

sub func2 {
     my $var = $_[0];
     $var->do_something2();
}

my $local = a_module->new();
$local->do_init;
func1($local);
func2($local);
[download]

The problem with the above code is that the variables $var in both func1 and func2 don't know that they are supposed to be an instance of type a_module and hence don't have clue what the member functions do_something1 and do_something2 are.

This leads to the obvious question, how do i tell the scalars in the subroutines that they in fact a certain type? Is the only way to do it to pass a reference to the variable such that when you operate on it, it then knows about the member functions. Something like...

use a_module;

sub func1 {
     my $var = $_[0];
     $var->do_something1();
}

sub func2 {
     my $var = $_[0];
     $var->do_something2();
}

my $local = a_module->new();
$local->do_init;
func1(\$local);
func2(\$local);
[download]

Thanks in advance for any thoughts =).
Regards Paul.

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