ch02.036_best

Perl Best Practices the source code

##############################################################################
##   Code fragment (Recommended) from Chapter 2 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 $raw;
my @perl5pats;
Readonly my $EMPTY_STR => q{};

sub addarray_internal {
    my ($var_name, $need_quotemeta) = @_;
 
    $raw .= $var_name;
 
    my $quotemeta = $need_quotemeta ? q{ map {quotemeta $_} } 
                  :                  $EMPTY_STR
                  ;
 
    my $perl5pat 
        = qq{(??{join q{|}, $quotemeta \@{$var_name}})};
 
    push @perl5pats, $perl5pat;
 
    return;
}