NAME

Algorithm::Diff::JSON - find the differences between two lists and report on them in JSON

SYNOPSIS

This perl code:

    use Algorithm::Diff::JSON qw(json_diff);

    my $json = json_diff(
        [0,      1, 2, 3, 4, 5,      6],
        ['zero', 1, 2, 3,    5, 5.5, 6]
    );

will generate this JSON:

    [
        { "element": 0, "change": { "remove": 0, "add": "zero" } },
        { "element": 4, "remove": 4 },
        { "element": 5, "add": 5.5 }
    ]

(well, an ugly, minimised, equivalent version of that JSON anyway)

FUNCTIONS

There is only one function, which is a simple wrapper around Algorithm::Diff's diff function:

json_diff

This takes two list-ref arguments. It returns a JSON array describing the changes needed to transform the first into the second.

This function may be exported. If you want to export it with a different name then you can do so:

    use Algorithm::Diff::JSON 'json_diff' => { -as => 'something_else };

Each element in the returned array is a hash. Hashes always have:

element

The element number, as given to us by Algorithm::Diff

and will also have exactly one of the following keys:

add

The content to add at this location

remove

The content to remove from this location

change

A hash of both ...

add

The content to add at this location

remove

The content which that replaces at this location

FEEDBACK

I welcome feedback about my code, including constructive criticism, bug reports, documentation improvements, and feature requests. The best bug reports include files that I can add to the test suite, which fail with the current code in my git repo and will pass once I've fixed the bug

Feature requests are far more likely to get implemented if you submit a patch yourself.

SOURCE CODE REPOSITORY

git://github.com/DrHyde/perl-modules-Algorithm-Diff-JSON.git

SEE ALSO

Text::Diff

Algorithm::Diff

AUTHOR, LICENCE and COPYRIGHT

Copyright 2020 David Cantrell <david@cantrell.org.uk>

This software is free-as-in-speech software, and may be used, distributed, and modified under the terms of either the GNU General Public Licence version 2 or the Artistic Licence. It's up to you which one you use. The full text of the licences can be found in the files GPL2.txt and ARTISTIC.txt, respectively.

CONSPIRACY

This module is also free-as-in-mason software.

cpanm Algorithm::Diff::JSON

perl -MCPAN -e shell
install Algorithm::Diff::JSON