ch06.019_prob

来自「Perl Best Practices the source code」· 019_PROB 代码 · 共 38 行

##############################################################################
## Code fragment (NOT RECOMMENDED) from Chapter 6 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;

Readonly my $ACCEPTANCE_THRESHOLD => 9;
my $measurement = 0;

my %is_exception;
@is_exception{11..18} = (1) x 8;

VALIDITY_CHECK:
until ($measurement > $ACCEPTANCE_THRESHOLD && ! $is_exception{$measurement}) {
    $measurement = get_next_measurement();
    redo VALIDITY_CHECK unless defined $measurement && $measurement ne '[null]';
    # etc.
}



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

sub get_next_measurement {
    return int rand 20;
}