ch05.040_prob

来自「Perl Best Practices the source code」· 040_PROB 代码 · 共 31 行

##############################################################################
## Code fragment (NOT 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 @frames = 1..2;
my %active = (
    top    => 99,
    prev   => 98,
    backup => 42,
);

$frames[@frames-1] = $active{top};         # Final frame
$frames[@frames-2] = $active{prev};        # Penultimate frame
$frames[@frames-3] = $active{backup};      # Prepenultimate frame


use Data::Dumper 'Dumper';
warn Dumper [ @frames ];