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Re: Implementing a cyclic array

by citromatik (Curate)
on Jun 19, 2009 at 12:39 UTC ( #773018=note: print w/ replies, xml ) Need Help??


in reply to Implementing a cyclic array

Tie::Cycle is a simple module that implements cyclic arrays through a tied reference (to the array):

use strict; use warnings; use Tie::Cycle; my @names = qw/tom harry diana nick sally henry/; tie my $cycle, 'Tie::Cycle', [ sub{print "$_[0] plays\n"}, sub{print "$_[0] eats\n"}, sub{print "$_[0] sleeps\n"} ]; $cycle && $cycle->($_) for (@names);

Prints:

tom plays harry eats diana sleeps nick plays sally eats henry sleeps

The last line ($cycle && $cycle->($_) for (@names);) seems a bit odd, but $cycle->($_) doesn't trigger the FETCH sub in the tied scalar (anybody knows why?) and a first call to $cycle is needed.

citromatik


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