ch08.065_prob

来自「Perl Best Practices the source code」· 065_PROB 代码 · 共 34 行

##############################################################################
## Code fragment (NOT RECOMMENDED) from Chapter 8 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 @candidates = qw( Nixon Clinton Kennedy );

sub valid {
    my ($name) = @_;
    return $name =~ m/on/xms;
}

my @flags   = (1..3);
my @files   = (4..6);
my @options = (7..9);

print grep valid($_), @candidates;
 
my @args = map substr($_, 0, 1), @flags, @files, @options; 

use Data::Dumper 'Dumper';
print Dumper [ @args ];