/ 
Role-TinyCommons-Collection-0.008
River stage two • 12 direct dependents • 30 total dependents
/ Role::TinyCommons::Collection::PickItems::Iterator

NAME

Role::TinyCommons::Collection::PickItems::Iterator - Provide pick_items() that picks by iterating all items once

VERSION

This document describes version 0.008 of Role::TinyCommons::Collection::PickItems::Iterator (from Perl distribution Role-TinyCommons-Collection), released on 2021-05-20.

DESCRIPTION

This role provides pick_items() that picks random items by doing a one-time full scan (or iteration) of a resettable iterator. The algorithm is a modified form of one that was presented in Learning Perl book.

Note that for a huge collection, this might not be a good idea. If your collection supports a fast get_item_at_pos and an efficient get_item_count, you can use Role::TinyCommons::FindItems::RandomPos. If your collection's items are lines from a filehandle, you can use Role::TinyCommons::FindItems::RandomSeekLines.

ROLES MIXED IN

Role::TinyCommons::Collection::PickItems

REQUIRED METHODS

reset_iterator

get_next_item

has_next_item

HOMEPAGE

Please visit the project's homepage at https://metacpan.org/release/Role-TinyCommons-Collection.

SOURCE

Source repository is at https://github.com/perlancar/perl-Role-TinyCommons-Collection.

BUGS

Please report any bugs or feature requests on the bugtracker website https://github.com/perlancar/perl-Role-TinyCommons-Collection/issues

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.

SEE ALSO

Role::TinyCommons::Collection::PickItems and other Role::TinyCommons::Collection::PickItems::*.

AUTHOR

perlancar <perlancar@cpan.org>

COPYRIGHT AND LICENSE

This software is copyright (c) 2021 by 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.