NAME

csv-sort - Sort CSV rows

VERSION

This document describes version 0.023 of csv-sort (from Perl distribution App-CSVUtils), released on 2019-06-06.

SYNOPSIS

Usage:

 % csv-sort [options] <filename>

DESCRIPTION

This utility sorts the rows in the CSV. Example input CSV:

 name,age
 Andy,20
 Dennis,15
 Ben,30
 Jerry,30

Example output CSV (using --by-fields +age which means by age numerically and ascending):

 name,age
 Dennis,15
 Andy,20
 Ben,30
 Jerry,30

Example output CSV (using --by-fields -age, which means by age numerically and descending):

 name,age
 Ben,30
 Jerry,30
 Andy,20
 Dennis,15

Example output CSV (using --by-fields name, which means by name ascibetically and ascending):

 name,age
 Andy,20
 Ben,30
 Dennis,15
 Jerry,30

Example output CSV (using --by-fields ~name, which means by name ascibetically and descending):

 name,age
 Jerry,30
 Dennis,15
 Ben,30
 Andy,20

Example output CSV (using --by-fields +age,~name):

 name,age
 Dennis,15
 Andy,20
 Jerry,30
 Ben,30

You can also reverse the sort order (-r), sort case-insensitively (-i), or provides the code (--by-code, for example --by-code '$a->[1] <=> $b->[1] || $b->[0] cmp $a->[0]' which is equivalent to --by-fields +age,~name). If you use --hash, your code will receive the rows to be compared as hashref, e.g. `--hash --by-code '$a->{age} <=> $b->{age} || $b->{name} cmp $a->{name}'.

OPTIONS

* marks required options.

Main options

--by-code-json=s

Perl code to do sorting (JSON-encoded).

See --by-code.

--by-code=s

Perl code to do sorting.

`$a` and `$b` (or the first and second argument) will contain the two rows to be compared.

--by-fields=s

A comma-separated list of field sort specification.

`+FIELD` to mean sort numerically ascending, `-FIELD` to sort numerically descending, `FIELD` to mean sort ascibetically ascending, `~FIELD` to mean sort ascibetically descending.

--ci, -i
--filename=s*, -f

Input CSV file.

--hash, -H

Provide row in $_ as hashref instead of arrayref.

--no-header

By default (`--header`), the first row of the CSV will be assumed to contain field names (and the second row contains the first data row). When you declare that CSV does not have header row (`--no-header`), the first row of the CSV is assumed to contain the first data row. Fields will be named `field1`, `field2`, and so on.

--reverse, -r
--tsv

Inform that input file is in TSV (tab-separated) format instead of CSV.

Output options

--format=s

Choose output format, e.g. json, text.

Default value:

 undef
--json

Set output format to json.

--naked-res

When outputing as JSON, strip result envelope.

Default value:

 0

By default, when outputing as JSON, the full enveloped result is returned, e.g.:

    [200,"OK",[1,2,3],{"func.extra"=>4}]

The reason is so you can get the status (1st element), status message (2nd element) as well as result metadata/extra result (4th element) instead of just the result (3rd element). However, sometimes you want just the result, e.g. when you want to pipe the result for more post-processing. In this case you can use `--naked-res` so you just get:

    [1,2,3]

Other options

--help, -h, -?

Display help message and exit.

--version, -v

Display program's version and exit.

COMPLETION

This script has shell tab completion capability with support for several shells.

bash

To activate bash completion for this script, put:

 complete -C csv-sort csv-sort

in your bash startup (e.g. ~/.bashrc). Your next shell session will then recognize tab completion for the command. Or, you can also directly execute the line above in your shell to activate immediately.

It is recommended, however, that you install modules using cpanm-shcompgen which can activate shell completion for scripts immediately.

tcsh

To activate tcsh completion for this script, put:

 complete csv-sort 'p/*/`csv-sort`/'

in your tcsh startup (e.g. ~/.tcshrc). Your next shell session will then recognize tab completion for the command. Or, you can also directly execute the line above in your shell to activate immediately.

It is also recommended to install shcompgen (see above).

other shells

For fish and zsh, install shcompgen as described above.

HOMEPAGE

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

SOURCE

Source repository is at https://github.com/perlancar/perl-App-CSVUtils.

BUGS

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

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.

AUTHOR

perlancar <perlancar@cpan.org>

COPYRIGHT AND LICENSE

This software is copyright (c) 2019, 2018, 2017, 2016 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.