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Data-Unixish-1.571
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/ Data::Unixish::cond

NAME

Data::Unixish::cond - Apply dux function conditionally

VERSION

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

SYNOPSIS

In Perl:

use Data::Unixish qw(lduxl);
my @res = lduxl([cond => {if => sub { $. % 2 }, then=>'uc', else=>'lc'}], "i", "love", "perl", "and", "c");
# => ("i", "LOVE", "perl", "AND", "c")

In command-line:

% echo -e "i\nlove\nperl\nand\nc" | dux cond --if '$. % 2' --then uc --else lc
i
LOVE
perl
AND
c

FUNCTIONS

cond

Usage:

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

Apply dux function conditionally.

This dux function takes a condition (a Perl code/expression) and one or two other dux functions (A and B). Condition will be evaluated for each item (where $_ will be set to the current item). If condition evaluates to true, then A is applied to the item, else B. All the dux functions must be itemfunc.

This function is not exported.

Arguments ('*' denotes required arguments):

  • else => str|array

    dux function to be applied if condition is false.

  • if* => str|code

    Perl code that specifies the condition.

  • in => array

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

  • out => any

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

  • then* => str|array

    dux function to be applied if condition is true.

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.

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.