ch02.065_best

来自「Perl Best Practices the source code」· 065_BEST 代码 · 共 32 行

##############################################################################
##   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;
use List::Util qw( max );

my $predicted_val;
my $minimum          = 0;
my $maximum          = 20;
my $predicted_change = 1;
my $fudge_factor     = 0.3;
my $local_epsilon    = 0.01;

$predicted_val 
    = ($minimum + $maximum) / 2 
      + $predicted_change * max($fudge_factor, $local_epsilon);


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