ch13.011_prob

Perl Best Practices the source code

##############################################################################
## Code fragment (NOT RECOMMENDED) from Chapter 13 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 $filename = '';

use Fatal qw( :void open close );
 
if (open my $out, '>', $filename) {     # call to open() in non-void context so
                                        #     open() returns false on failure
 
    open my $in, '<', '$filename.dat';  # call to open() in void context so
                                        #     open() throws exception on failure
 
    print {$out} <$in>;   
 
    close $out or warn $!;              # call close() in non-void context so
                                        #     close() returns false on failure
 
    close $in;                          # call close() in void context so
                                        #     close() throws exception on failure
}