ch14.016_best

Perl Best Practices the source code

##############################################################################
##   Code fragment (Recommended) from Chapter 14 of "Perl Best Practices"   ##
##     Copyright (c) O'Reilly & Associates, 2005. All Rights Reserved.      ##
##  See: http://www.oreilly.com/pub/a/oreilly/ask_tim/2001/codepolicy.html  ##
##############################################################################


# Standard modules...
use strict;
use warnings;
use IO::Prompt;
use Carp;
use English qw( -no_match_vars );
use Data::Alias;
use Readonly;

sub transform {
    my ($datum) = @_;
    return uc $datum;
}

my $destination;
my $source_file = \'Eat at Joes';
my $destination_file = \$destination;

# Open both filehandles...
use IO::InSitu;
my ($src, $dest) = open_rw($source_file, $destination_file);
 
# Read, process, and output data, line-by-line...
while (my $line = <$src>) {
    print {$dest} transform($line);
}



use Data::Dumper 'Dumper';
warn Dumper [ $destination ];