DOKK / manpages / debian 12 / libarray-iterator-perl / Array::Iterator::Circular.3pm.en
Array::Iterator::Circular(3pm) User Contributed Perl Documentation Array::Iterator::Circular(3pm)

Array::Iterator::Circular - A subclass of Array::Iterator to allow circular iteration

This document describes version 0.131 of Array::Iterator::Circular (from Perl distribution Array-Iterator), released on 2021-09-26.

  use Array::Iterator::Circular;
  # create an instance with a
  # small array
  my $color_iterator = Array::Iterator::Circular->new(qw(red green blue orange));
  # this is a large list of
  # arbitrary items
  my @long_list_of_items = ( ... );
  # as we loop through the items ...
  foreach my $item (@long_list_of_items) {
      # we assign color from our color
      # iterator, which will keep dispensing
      # as it loops through its set
      $item->set_color($color_iterator->next());
  }
  # tell us how many times the set
  # was looped through
  print $color_iterator->get_loop_count();

This iterator will loop continuosly as long as "next" or "get_next" is called. The "has_next" method will always return true (1), since the list will always loop back. This is useful when you need a list to repeat itself, but don't want to (or care to) know that it is doing so.

This is a subclass of Array::Iterator, only those methods that have been added or altered are documented here, refer to the Array::Iterator documentation for more information.

Since we endlessly loop, this will always return true (1).
This will return the next item in the array, and when it reaches the end of the array, it will loop back to the beginning again.
This method is now defined in terms of "next", since neither will even stop dispensing items, there is no need to differentiate.
If at anytime during your looping, you want to know if you have arrived back at the start of you list, you can ask this method.
If at anytime during your looping, you want to know if you have gotten to the end of you list, you can ask this method.
This method will tell you how many times the iterator has looped back to its start.

Please visit the project's homepage at <https://metacpan.org/release/Array-Iterator>.

Source repository is at <https://github.com/perlancar/perl-Array-Iterator>.

This is a subclass of Array::Iterator, please refer to it for more documentation.

perlancar <perlancar@cpan.org>

stevan little, <stevan@iinteractive.com>

To contribute, you can send patches by email/via RT, or send pull requests on GitHub.

Most of the time, you don't need to build the distribution yourself. You can simply modify the code, then test via:

 % prove -l

If you want to build the distribution (e.g. to try to install it locally on your system), you can install Dist::Zilla, Dist::Zilla::PluginBundle::Author::PERLANCAR, and sometimes one or two other Dist::Zilla plugin and/or Pod::Weaver::Plugin. Any additional steps required beyond that are considered a bug and can be reported to me.

This software is copyright (c) 2021, 2017, 2013, 2012, 2011 by perlancar <perlancar@cpan.org>.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

Copyright 2004 by Infinity Interactive, Inc.

<http://www.iinteractive.com>

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

Please report any bugs or feature requests on the bugtracker website <https://rt.cpan.org/Public/Dist/Display.html?Name=Array-Iterator>

When submitting a bug or request, please include a test-file or a patch to an existing test-file that illustrates the bug or desired feature.

2022-10-13 perl v5.34.0