#!/usr/bin/perl
use warnings;
use strict;

#4.47: How do I handle circular lists?

#    Circular lists could be handled in the traditional fashion with linked
#    lists, or you could just do something like this with an array:

#            unshift(@array, pop(@array));  # the last shall be first
#            push(@array, shift(@array));   # and vice versa

#    You can also use "Tie::Cycle":

use Tie::Cycle;

tie my $cycle, 'Tie::Cycle', [ qw( FFFFFF 000000 FFFF00 ) ];

print $cycle; # FFFFFF
print $cycle; # 000000
print $cycle; # FFFF00

print $cycle; # FFFFFF
print $cycle; # 000000
print $cycle; # FFFF00