ch03.021_best

Perl Best Practices the source code

##############################################################################
##   Code fragment (Recommended) from Chapter 3 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 @events;
my @handlers;
my @unknowns;
 
# and later...
 
for my $event (@events) {
    push @unknowns, grep { ! $_->handle($event) } @handlers; 
}
 
print map { $_->err_msg } @unknowns;