NAME

WordListRole::Bloom - Provide word_exists() that uses bloom filter

VERSION

This document describes version 0.004 of WordListRole::Bloom (from Perl distribution WordListRole-Bloom), released on 2020-05-22.

SYNOPSIS

In your WordList/EN/Foo.pm:

 package WordList::EN::Foo;

 __DATA__
 word1
 word2
 ...

In your WordListBloom/EN/Foo.pm:

 package WordListBloom::EN::Foo;
 1;
 __DATA__
 (The actual bloom filter, base64-encoded)

Then:

 use Role::Tiny;
 use WordList::EN::Foo;
 my $wl = WordList::EN::Foo->new;
 Role::Tiny->apply_roles_to_object($wl, 'WordListRole::Bloom');

 $wl->word_exists("foo"); # uses bloom filter to check for existence.

DESCRIPTION

EXPERIMENTAL.

This role provides an alternative word_exists() method that checks a bloom filter located in the data section of WordListBloom::<Your_WordList_Subpackage>. This provides a low startup-overhead way to check an item against a big list (e.g. millions). Note that testing using a bloom filter can result in a false positive (i.e. word_exists() returns true but the word is not actually in the list.

PROVIDED METHODS

word_exists

HOMEPAGE

Please visit the project's homepage at https://metacpan.org/release/WordListRole-Bloom.

SOURCE

Source repository is at https://github.com/perlancar/perl-WordListRole-Bloom.

BUGS

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

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

AUTHOR

perlancar <perlancar@cpan.org>

COPYRIGHT AND LICENSE

This software is copyright (c) 2020 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.