We have a perl file, test.pl, that looks something like this:
use strict;
use test_module;

my %hash;
$hash{foo} = "bar";
$hash{bar} = "foo";

&test

[download]

and we have another file called "test_module.pm" that looks like this: 
use strict;

sub test {

    my $test = $main::hash{foo};

    print "$test\n";

}

1;

[download]
The goal of this exercise is to print the contents of $hash{foo} without passing a reference to %hash as an argument to the sub "test".

I know this example is overly simple, and the solution given this code is just to pass the reference. But this is not possible in our real code.

The above code compiles and runs, but obviously does not work.

Thanks.

In reply to variables across modules by Anonymous Monk

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