Chargrill is definitely correct. I do that very thing from time to time while developing.

But, please also consider that editing the module directly may be the wrong approach — unless you intend to release patches to the module maintainer. Otherwise, the next time you install a new version of Module, you'll have to make all your changes all over again.

package BetterApproach;

use strict;
use warings;
use Module;
use base qw(Module);

sub extended_function {
    my $self = shift;

    if( $something ) {
       # new stuff
       return $new_stuff
    }

    $self->SUPER::extended_function(@_); # old stuff
}
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and if you can't submit your improvements to the original module's author or if your modifications dont fit with the intent of the original, rewrite the module in question under a subsequent namespace (making sure to credit the original module and author, especially if you're largely including any of their code).

ie: if the original module was App::Functionality, name your modified module App::Functionality::Extra

__________
The trouble with having an open mind, of course, is that people will insist on coming along and trying to put things in it.
- Terry Pratchett

You could just use the -I flag to perl, i.e.:

$ perl -I/path/to/edited/Module yourApp.pl
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Though I don't recall off the top of my head if that puts the path/to/edited/Module at the top of @INC or not ... but surely a trip to perlrun could clear that up for you.

s**lil*;  $*=join'',sort split q**;  s;.*;grr; &&s+(.(.)).+$2$1+; $; =
qq-$_-;s,.*,ahc,;$,.=chop for split q,,,reverse;print for($,,$;,$*,$/)
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Thanks for the helpful replies. It took me a little while to interpret some of it correctly, so I herein post my trouble for anybody else who is trying to do the same.

The -I suggestion was very helpful, but I was not having any joy trying to give it two directories to add to @INC. The Camel doc told me that it was preferable to use lib in the script instead of -I in the call to Perl. Did that. I am editing Grapher.pm in the Module::Dependency CPAN module. I have it sitting in /home/throop/perl/Module-Dependency-1.86/lib/Module/Dependency/Grapher.pm Naively, I entered the code:

use lib qw(/home/throop/perl/Module-Dependency-1.86/lib/Module/Depende
+ncy);
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use lib qw(/home/throop/perl/Module-Dependency-1.86/lib);
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As for the wisdom of modifying CPAN module code — point taken. I wrote the maintainer with some queries and he noted that the particular section of the code that I need hasn't received much loving for a long time; asked me to update it. I may do that; I'm having discussions with my employer. I know about forgiveness and permission but I'm wish to be careful and scrupulous.

throop