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

VERSION
    This document describes version 0.006 of WordListRole::Bloom (from Perl
    distribution WordListRole-Bloom), released on 2020-05-24.

SYNOPSIS
    In your lib/WordList/EN/Foo.pm:

     package WordList::EN::Foo;

     use parent 'WordList';

     use Role::Tiny::With;
     with 'WordListRole::Bloom';

     __DATA__
     word1
     word2
     ...

    In your share/bloom, create your bloom filter data file, e.g. with
    bloomgen:

     % perl -ne 'print if (/^__DATA__$/ .. 0) && $i++' lib/WordList/EN/Foo.pm | \
       bloomgen -n 1234 -p 0.1% > share/bloom

    (where "-n" is set to the number of words, "-p" to the maximum
    false-positive rate).

    After that, in yourscript.pl:

     my $wl = WordList::EN::Foo->new;
     $wl->word_exists("foo"); # uses bloom filter to check for existence.

DESCRIPTION
    This role provides an alternative "word_exists()" method that checks a
    bloom filter located in the distribution share directory (share/bloom).
    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.