NAME
List::Rotation::Cycle - Cycle through a list of values via a singleton object implemented as closure.
SYNOPSIS
use List::Rotation::Cycle;
my @array = qw( A B C );
my $first_cycle = List::Rotation::Cycle->new(@array);
my $second_cycle = List::Rotation::Cycle->new(@array);
print $first_cycle->next; ## prints A
print $second_cycle->next; ## prints B
print $first_cycle->next; ## prints C
print $second_cycle->next; ## prints A, looping back to beginningDESCRIPTION
Use List::Rotation::Cycle to loop through a list of values. Once you get to the end of the list, you go back to the beginning.
List::Rotation::Cycle is implemented as a Singleton Pattern. You always just get 1 (the very same) Cycle object even if you use the new method several times. This is done by using Memoize on the new method. It returns the same object for every use of new that comes with the same List of parameters.
OBJECT METHODS
- new
-
Create a Cycle object for the list of values in the list.
- next
-
Return the next element. This method is implemented as a closure.
AUTHOR
Imre Saling, <pelagicatcpandotorg>
COPYRIGHT and LICENSE
Copyright 2000-2004, Imre Saling, All rights reserved.
This software is available under the same terms as perl.