ch06.011_best

来自「Perl Best Practices the source code」· 011_BEST 代码 · 共 25 行

##############################################################################
##   Code fragment (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;

my @generated_lines = (undef, "A LINE\n", undef, "Another line\n");

for my $line (@generated_lines) {
    if (defined $line) {
        print lc $line;
    }
}