ch05.029_best

Perl Best Practices the source code

##############################################################################
##   Code fragment (Recommended) from Chapter 5 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;

my $error_mesg   = '    Oops!    ';
my @diagnostics = (
    '     Something is wrong!     ',
    '     Very wrong!     ',
);

sub trimmed_copy_of {
    my $string = (@_ > 0) ? shift : $_;
    $string =~ s{\A \s* (.*?) \s* \z}{$1}xms;
    return $string;
}


print trimmed_copy_of($error_mesg);
 
for (@diagnostics) {
    print trimmed_copy_of;
}

use Data::Dumper 'Dumper';
warn Dumper [
    $error_mesg,
    @diagnostics,
];