List::Rotation::Cycle - Cycle through a list of values via a singleton object implemented as closure.
Contents
Copyright And License
Copyright 2000-2004, Imre Saling, All rights reserved.
This software is available under the same terms as perl.
perl v5.36.0 2022-10-15 List::Rotation::Cycle(3pm)
Description
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.
Name
List::Rotation::Cycle - Cycle through a list of values via a singleton object implemented as closure.
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.
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 beginning
