App::CSelUtils - Utilities related to Data::CSel
This document describes version 0.083 of App::CSelUtils (from Perl distribution App-CSelUtils), released on 2019-07-30.
This distribution contains the following utilities:
ddsel
parse-csel
Usage:
ddsel(%args) -> [status, msg, payload, meta]
Select Perl data structure elements using CSel (CSS-selector-like) syntax.
Note that this operates against Perl data structure, not Perl source code elements (see ppisel for that). File is Perl source code that defines data structure, e.g.:
{ summary => 'This is a hash', # this is an array inside a hash array => [ 1, 2, 3, ], };
This function is not exported.
Arguments ('*' denotes required arguments):
expr => str
file => str (default: "-")
node_actions => array[str] (default: ["print_as_string"])
Specify action(s) to perform on matching nodes.
Each action can be one of the following:
count will print the number of matching nodes.
count
print_method will call on or more of the node object's methods and print the result. Example:
print_method
print_method:as_string
dump will show a indented text representation of the node and its descendants. Each line will print information about a single node: its class, followed by the value of one or more attributes. You can specify which attributes to use in a dot-separated syntax, e.g.:
dump
dump:tag.id.class
which will result in a node printed like this:
HTML::Element tag=p id=undef class=undef
By default, if no attributes are specified, id is used. If the node class does not support the attribute, or if the value of the attribute is undef, then undef is shown.
id
undef
select_action => str (default: "csel")
Specify how we should select nodes.
The default is csel, which will select nodes from the tree using the CSel expression. Note that the root node itself is not included. For more details on CSel expression, refer to Data::CSel.
csel
root will return a single node which is the root node.
root
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)
parse_csel(%args) -> [status, msg, payload, meta]
Parse CSel expression.
expr* => str
Please visit the project's homepage at https://metacpan.org/release/App-CSelUtils.
Source repository is at https://github.com/perlancar/perl-App-CSelUtils.
Please report any bugs or feature requests on the bugtracker website https://rt.cpan.org/Public/Dist/Display.html?Name=App-CSelUtils
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.
htmlsel, orgsel, jsonsel, yamlsel, podsel, ppisel
perlancar <perlancar@cpan.org>
This software is copyright (c) 2019, 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.
To install App::CSelUtils, copy and paste the appropriate command in to your terminal.
cpanm
cpanm App::CSelUtils
CPAN shell
perl -MCPAN -e shell install App::CSelUtils
For more information on module installation, please visit the detailed CPAN module installation guide.