ch19.045_prob

来自「Perl Best Practices the source code」· 045_PROB 代码 · 共 42 行

##############################################################################
## Code fragment (NOT RECOMMENDED) from Chapter 19 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 = (
    "ID: 12345\nNome: Jones\nParty: Animal\n",
    "ID: 23454\nName: Smith\nParty: Hard\n",
    "Name: Nguyen; \n",
);
my $target_name;

# Find the first candidate with a valid Name: field...
CANDIDATE:
for my $candidate (@candidates) {
    # Extract the contents of the Name: field...
    my ($name) 
        = $candidate =~ m/^Name: (.+?);$/xms;
 
    # ...or try elsewhere...
    next CANDIDATE if !defined $name;
 
    # If name found, save it and we're done...
    $target_name = $name;
    last CANDIDATE;
}


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