ch05.025_prob

来自「Perl Best Practices the source code」· 025_PROB 代码 · 共 51 行

##############################################################################
## Code fragment (NOT RECOMMENDED) from Chapter 5 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 $error_mesg   = '    Oops!    ';
my @diagnostics = (
    '     Something is wrong!     ',
    '     Very wrong!     ',
);

sub trimmed_copy_of {
    # Trim explicit arguments...
    if (@_ > 0) {
        my ($string) = @_;
        $string =~ s{\A \s* (.*?) \s* \z}{$1}xms;
        return $string;

    }

    # Otherwise, trim the default argument (i.e. $_)...
    else {
        s{\A \s* (.*?) \s* \z}{$1}xms;
        return $_;
    }
}


print trimmed_copy_of($error_mesg);
 
for (@diagnostics) {
    print trimmed_copy_of;
}

use Data::Dumper 'Dumper';
warn Dumper [
    $error_mesg,
    @diagnostics,
];