Re: Executing a subroutine from a runtime chosen module

[Gunnar Hjalmarsson]

Octavian Rasnita wrote:
Does anyone know how can I do something like:
my $mod = "Module.pm";
#Then require this $mod module (using eval()
#Then executing a certain subroutine from that module and getting
the results.
I found that I can require a module and execute it entirely but I
am not able to choose to execute just a subroutine from it, nor to
extract the value of a certain variable because if I require that
module using eval(), the vars are not exported.
If the module exports something, it will be imported if you import it. 
;-)  Otherwise you are still able to access subroutines and global 
variables by calling them with fully qualified names:

    Module::somefunction();
To import something, you can for instance do:
    my $mod = 'Module';   # without the '.pm' extension
    eval "require $mod";
    unless ($@) {
        import $mod qw(somefunction);
        somefunction();
    }
or
    my $mod = 'Module';
    eval "use $mod qw(somefunction)";
    unless ($@) {
        somefunction();
    }
Please see:
    perldoc perlmod
    perldoc -f eval
HTH
--
Gunnar Hjalmarsson
Email: http://www.gunnar.cc/cgi-bin/contact.pl
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