I need help with an example in "Network Programming With Perl" by Lincoln Stein. Here's a snipet of the code for the IO::SessionSet Module: 
package IO::SessionSet

use strict;
use Carp;
use IO::Handle;
use IO::SessionData;

use vars '$DEGUG';
$DEBUG = 0;

sub new {
   my $pack = shift;
   my $listen = shift;
   sub new {
      my $self = bless {
                         sessions => {},
                         readers  => IO::Select->new(),
                         writers  => IO::Select->new(),
                       }, $pack;
      if (defined($listen) and $listen->can('accept') {
          $self->{listen_socket} = $listen;
          $self->{readers}->add($listen);
      }
      return $self;
}

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I can't find anything in this example which has $listen->can('accept'), where is he pulling this method from? Thanks.

In reply to Nonblocking IO Module by perlknight

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