You aren't exporting the subroutines.

Without exporting them, you have to call them fully qualified: 

$string = customPerlMod::trim($string);

[download]

Or, export them: 

package customPerlMod;
use Exporter 'import';
our @EXPORT_OK = qw( trim ltrim rtrim );

[download]
and then in the using code: 
use customPerlMod qw{ trim };
$string = trim($string);

[download]

Other problems I noticed:

  1. You're using prototypes. Are you sure you know what they do?
  2. You commented out use strict;. And the module doesn't seem to use it at all. That's gonna hurt you.

map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

In reply to Re: Trouble usig a subroutine from a custom module by choroba
in thread Trouble usig a subroutine from a custom module by fritz1968

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