This must not be too hard but I have not been able to figure it out for months. Let's say I have the perl script X.pl that uses module Y. Here is script X: 
#!/usr/bin/perl

use Y;
use strict;

my %hash_to_send;
$hash_to_send{first_colour} = "red";
$hash_to_send{second_colour} = "white";
$hash_to_send{third_colour} = "blue";

return &Y::module_subroutine($hash_to_send);

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Here is the module example: 
#!/usr/bin/perl
package Y;
@ISA         = qw(Exporter);
@EXPORT_OK   = qw(module_subroutine)

sub module_subroutine {
my($hash) = @_;
return "The colour of the sky is ".$hash{third_colour};
}

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However, it doesn't seem to get the hash succesfully. What am I doing wrong? I heard about using references to the hash instead? That's great but the reference would only be working in the script and not in the module right? Like here: 
return &Y::module_subroutine(\$hash_to_send);

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I'm lost! Any help is very very welcome.

In reply to Transferring local hashes to module subroutines by cowgirl

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