Hi Jim, On Thu, 28 Feb 2013 11:21:59 -0800 Jim Gibson <jimsgib...@gmail.com> wrote:
> > On Feb 28, 2013, at 10:31 AM, Chris Stinemetz wrote: > > > I want to put a hash declaration in a separate file from the main script. > > How do I do this correctly? > > > > perl.pl ( main script ) > > > > #!/usr/bin/perl > > use warnings; > > use strict; > > use Data::Dumper; > > > > require "lib.pl"; > > > > print Dumper \%hash; > > > > lib.pl ( library script ) > > > > #!/usr/bin/perl > > use warnings; > > use strict; > > > > my %hash = ( > > "Version" => 0, > > "SRT" => 11, > > "SRFC" => 12, > > "CFC" => 21, > > "CFCQ" => 22, > > "ICell" => 29, > > "ISector" => 30, > > "Cell" => 31, > > "Sector" => 32, > > ); > > > > 1; > > > > The error I am getting: > > > > Global symbol "%hash" requires explicit package name at perl.pl line 8. > > Execution of perl.pl aborted due to compilation errors. > > Put the following line in the main script: > > our %hash; > > Change the "my %hash = ( ... );" declaration in lib.pl to "our %hash = > (...);". > > In your original versions, %hash was a lexical variable in lib.pl, and thus > not in scope within perl.pl. Using 'our' instead of 'my' makes %hash a > package variable (in package main::), and as such is accessible by both > perl.pl and lib.pl, The 'our' declaration also lets you leave off the package > name when you access the variable. > It is a better idea to put this inside a module and export a subroutine for accessing it (or use an object-oriented interface). See: http://perl-begin.org/topics/modules-and-packages/ Untested code: <<<< ## This is the file MyModule.pm - don't call it that. package MyModule; use parent 'Exporter'; our @EXPORT = (qw(get_ref_to_global_hash)); my %global_hash = ( 'donald' => 'duck', 'mickey' => 'mouse', 'goofy' => 'dog', ); sub get_ref_to_global_hash { return \%global_hash; } # Module should return a true value. 1; >>>> Regards, Shlomi Fish -- ----------------------------------------------------------------- Shlomi Fish http://www.shlomifish.org/ Interview with Ben Collins-Sussman - http://shlom.in/sussman Sometimes you don’t need to be familiar with a better alternative to know that something sucks. Take Microsoft Word for example. — Shlomi Fish’s friend. Please reply to list if it's a mailing list post - http://shlom.in/reply . -- To unsubscribe, e-mail: beginners-unsubscr...@perl.org For additional commands, e-mail: beginners-h...@perl.org http://learn.perl.org/
