SPUG: Calling a file as a sub-routine?

Matt Tucker tuck at whistlingfish.net
Thu Jul 12 15:00:22 CDT 2001

-- Jay Scherrer <jay at Scherrer.com> spake thusly:

> How can I call a separate .pl file into the main as a sub-routine?
> I am trying to create separate reusable files instead of listing all
> of the routines as subs in a large program.
> How do I set up a separate file called outside.pl and then use it as a
> subroutine inside the main program called mainProgram.pl?
> example:
> outside.pl
> sub outside {
> do something;
> }
> mainProgram.pl
># !/usr/bin/perl -w
> require "outside.pl";
> if ($foo = $bar) {
> outside.pl;
> }

Why not just:

if ($foo == $bar) {

And if you're going to start doing that sort of thing, why not use

package Outside;

sub outside {
    do something;


use Outside;

if ($foo == $bar) {
    Outside::outside();  # Or use Exporter if you don't want to
                         # be calling by package name every time

This is what the package system is for, and everyone's used to it.
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