Provided by: liblist-rotation-cycle-perl_1.009-1_all
List::Rotation::Cycle - Cycle through a list of values via a singleton object implemented as closure.
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
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.
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.
Imre Saling, "<pelagicatcpandotorg>"
COPYRIGHT and LICENSE
Copyright 2000-2004, Imre Saling, All rights reserved. This software is available under the same terms as perl.