NAME

Data::Unixish::head - Output the first items of data

VERSION

This document describes version 1.571 of Data::Unixish::head (from Perl distribution Data-Unixish), released on 2019-10-26.

SYNOPSIS

In Perl:

 use Data::Unixish::head;
 my @res;
 @res = dux("head", 1..100); # => (1..10)
 @res = dux([head => {items=>3}], 1..100); # => (1, 2, 3)

In command line:

 % seq 1 100 | dux head -n 20 | dux tail --format=text-simple -n 5
 16
 17
 18
 19
 20

FUNCTIONS

head

Usage:

 head(%args) -> [status, msg, payload, meta]

Output the first items of data.

This function is not exported.

Arguments ('*' denotes required arguments):

• in => array

  Input stream (e.g. array or filehandle).

• items => int (default: 10)

  Number of items to output.

• out => any

  Output stream (e.g. array or filehandle).

Returns an enveloped result (an array).

First element (status) is an integer containing HTTP status code (200 means OK, 4xx caller error, 5xx function error). Second element (msg) is a string containing error message, or 'OK' if status is 200. Third element (payload) is optional, the actual result. Fourth element (meta) is called result metadata and is optional, a hash that contains extra information.

Return value: (any)

HOMEPAGE

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

SOURCE

Source repository is at https://github.com/perlancar/perl-Data-Unixish.

BUGS

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

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

head(1)

Data::Unixish::tail

AUTHOR

perlancar <perlancar@cpan.org>

COPYRIGHT AND LICENSE

This software is copyright (c) 2019, 2017, 2016, 2015, 2014, 2013, 2012 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.

cpanm Data::Unixish

perl -MCPAN -e shell
install Data::Unixish