Is it good practice to export variables in Perl?
- by gvkv
I'm finding it very convenient to pass configuration and other data that is read or calculated once but then used many times throughout a program by using Perl's use mechanism. I'm doing this by exporting a hash into the caller's namespace. For example:
package Myconfiguration;
my %config;
sub import {
my $callpkg = caller(0);
my $expsym = $_[1];
configure() unless %config;
*{"$callpkg\::$expsym"} = \%config;
}
and then in other modules:
use MyConfiguration (loc_config_sym);
if ( $loc_config_sym{paramater} ) {
# ... do stuff ...
}
However, I'm not sure about this as a best practice. Is it better to add a method that returns a hash ref with the data? Something else?
