NAME
Data::TableData::Rank - Add a rank column to a table
VERSION
This document describes version 0.002 of Data::TableData::Rank (from Perl distribution Data-TableData-Rank), released on 2022-03-27.
FUNCTIONS
add_rank_column_to_table
Usage:
add_rank_column_to_table(%args) -> [$status_code, $reason, $payload, \%result_meta]Add a rank column to a table.
Will modify the table by adding a rank column. An example, with this table:
| name | gold | silver | bronze |
|------------+------+--------+--------|
| E | 2 | 5 | 7 |
| A | 10 | 20 | 15 |
| H | 0 | 0 | 1 |
| B | 8 | 23 | 17 |
| G | 0 | 0 | 1 |
| J | 0 | 0 | 0 |
| C | 4 | 10 | 8 |
| D | 4 | 9 | 13 |
| I | 0 | 0 | 1 |
| F | 2 | 5 | 1 |the result of ranking the table with data columns of ["gold","silver","bronze"] will be:
| name | gold | silver | bronze | rank |
|------------+------+--------+--------+------|
| A | 10 | 20 | 15 | 1 |
| B | 8 | 23 | 17 | 2 |
| C | 4 | 10 | 8 | 3 |
| D | 4 | 9 | 13 | 4 |
| E | 2 | 5 | 7 | 5 |
| F | 2 | 5 | 1 | 6 |
| G | 0 | 0 | 1 | =7 |
| H | 0 | 0 | 1 | =7 |
| I | 0 | 0 | 1 | =7 |
| J | 0 | 0 | 0 | 10 |This function is not exported by default, but exportable.
Arguments ('*' denotes required arguments):
add_equal_prefix => bool (default: 1)
data_columns* => array[str]
Array of names (or indices) of columns which contain the data to be compared, which must all be numeric.
rank_column_idx => int
rank_column_name => str (default: "rank")
smaller_wins => bool (default: 0)
Whether a smaller number in the data wins; normally a bigger name means a higher rank.
table* => any
A table data (either aoaos, aohos, or its Data::TableData::Object wrapper).
Returns an enveloped result (an array).
First element ($status_code) is an integer containing HTTP-like status code (200 means OK, 4xx caller error, 5xx function error). Second element ($reason) is a string containing error message, or something like "OK" if status is 200. Third element ($payload) is the actual result, but usually not present when enveloped result is an error response ($status_code is not 2xx). Fourth element (%result_meta) is called result metadata and is optional, a hash that contains extra information, much like how HTTP response headers provide additional metadata.
Return value: (any)
HOMEPAGE
Please visit the project's homepage at https://metacpan.org/release/Data-TableData-Rank.
SOURCE
Source repository is at https://github.com/perlancar/perl-Data-TableData-Rank.
SEE ALSO
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 -lIf 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.
COPYRIGHT AND LICENSE
This software is copyright (c) 2022, 2021 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=Data-TableData-Rank
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.