ch09.049_best

来自「Perl Best Practices the source code」· 049_BEST 代码 · 共 43 行

##############################################################################
##   Code fragment (Recommended) from Chapter 9 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;


sub defined_samples_in {
    my @defined_samples = grep {defined $_} @_;
 
    # Return all defined args in list context...
    if (wantarray) {
        return @defined_samples;
    }
    # Return all defined args (indirectly) in scalar context...
    return \@defined_samples;

}



my @raw_samples = (undef, 1, 9, undef, 8, undef, 4);

use Data::Dumper 'Dumper';

warn Dumper [
    defined_samples_in(@raw_samples)
];

warn Dumper [
    scalar defined_samples_in(@raw_samples)
];