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Acme-CPANModules-PickingRandomLinesFromFile-0.004
River stage one • 1 direct dependent • 1 total dependent
/ Acme::CPANModules::PickingRandomLinesFromFile

NAME

Acme::CPANModules::PickingRandomLinesFromFile - List of modules to pick random lines from a file

VERSION

This document describes version 0.004 of Acme::CPANModules::PickingRandomLinesFromFile (from Perl distribution Acme-CPANModules-PickingRandomLinesFromFile), released on 2023-06-20.

ACME::CPANMODULES ENTRIES

File::Random

Author: BIGJ

The random_line() function from this module picks one or more random lines from a specified file. The whole content of the file does not need to be slurped into memory, but the routine requires a single-pass of reading all lines from the file. The algorithm is as described in perlfaq (See: perldoc -q "random line").

If you pick more than one lines, then there might be duplicates.

File::RandomLine

Recommended for large files.

Author: DAGOLDEN

This module gives you a choice of two algorithms. The first is similar to File::Random (the scan method), giving each line of the file equal weight. The second algorithm is more interesting: it works by random seeking the file, discarding the line fragment (a.k.a. searching forward for the next newline character), reading the next line, then repeating the process until the desired number of lines is reached. This means one doesn't have to read the whole file and the picking process is much faster than the scan method. It might be preferred for very large files.

Note that due to the nature of the algorithm, lines are weighted by the number of characters. In other words, lines that have long lines immediately preceding them will have a greater probability of being picked. Depending on your use case or the line length variation of your file, this algorithm might or might not be acceptable to you.

File::Random::Pick

Author: PERLANCAR

This module is an alternative to File::Random. It offers a random_line() routine that avoids duplication.

App::PickRandomLines

Author: PERLANCAR

A CLI that allows you to use File::Random::Pick or File::RandomLine on the command-line.

FAQ

What is an Acme::CPANModules::* module?

An Acme::CPANModules::* module, like this module, contains just a list of module names that share a common characteristics. It is a way to categorize modules and document CPAN. See Acme::CPANModules for more details.

What are ways to use this Acme::CPANModules module?

Aside from reading this Acme::CPANModules module's POD documentation, you can install all the listed modules (entries) using cpanm-cpanmodules script (from App::cpanm::cpanmodules distribution):

% cpanm-cpanmodules -n PickingRandomLinesFromFile

Alternatively you can use the cpanmodules CLI (from App::cpanmodules distribution):

% cpanmodules ls-entries PickingRandomLinesFromFile | cpanm -n

or Acme::CM::Get:

% perl -MAcme::CM::Get=PickingRandomLinesFromFile -E'say $_->{module} for @{ $LIST->{entries} }' | cpanm -n

or directly:

% perl -MAcme::CPANModules::PickingRandomLinesFromFile -E'say $_->{module} for @{ $Acme::CPANModules::PickingRandomLinesFromFile::LIST->{entries} }' | cpanm -n

This Acme::CPANModules module also helps lcpan produce a more meaningful result for lcpan related-mods command when it comes to finding related modules for the modules listed in this Acme::CPANModules module. See App::lcpan::Cmd::related_mods for more details on how "related modules" are found.

HOMEPAGE

Please visit the project's homepage at https://metacpan.org/release/Acme-CPANModules-PickingRandomLinesFromFile.

SOURCE

Source repository is at https://github.com/perlancar/perl-Acme-CPANModules-PickingRandomLinesFromFile.

SEE ALSO

Acme::CPANModules::PickingRandomItemsFromList

Acme::CPANModules::ReadingFilesBackward

Acme::CPANModules - about the Acme::CPANModules namespace

cpanmodules - CLI tool to let you browse/view the lists

AUTHOR

perlancar <perlancar@cpan.org>

CONTRIBUTING

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, Pod::Weaver::PluginBundle::Author::PERLANCAR, and sometimes one or two other Dist::Zilla- and/or Pod::Weaver plugins. Any additional steps required beyond that are considered a bug and can be reported to me.

COPYRIGHT AND LICENSE

This software is copyright (c) 2023, 2019 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.

BUGS

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

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.