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Data-Circular-Util-0.59
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/ Data::Circular::Util

NAME

Data::Circular::Util - Remove circular references by deep-copying them

VERSION

This document describes version 0.59 of Data::Circular::Util (from Perl distribution Data-Circular-Util), released on 2015-09-03.

SYNOPSIS

DESCRIPTION

FUNCTIONS

clone_circular_refs($data) -> any

Remove circular references by deep-copying them.

For example, this data:

$x = [1];
$data = [$x, 2, $x];

contains circular references by referring to $x twice. After clone_circular_refs, data will become:

$data = [$x, 2, [1]];

that is, the subsequent circular references will be deep-copied. This makes it safe to transport to JSON, for example.

Sometimes it doesn't work, for example:

$data = [1];
push @$data, $data;

Cloning will still create circular references.

This function modifies the data structure in-place, and return true for success and false upon failure.

Arguments ('*' denotes required arguments):

  • data* => any

Return value: (any)

has_circular_ref($data) -> any

Check whether data item contains circular references.

Does not deal with weak references.

Arguments ('*' denotes required arguments):

  • data* => any

Return value: (any)

SEE ALSO

SHARYANTO

Data::Structure::Util has the XS version of has_circular_ref which is at least around 3 times faster than this module's implementation which is pure Perl. Use that instead if possible (in some cases, Data::Structure::Util fails to build and this module provides an alternative for that function). Data::Structure::Util does not the equivalent of this module's clone_circular_refs though.

This module is however much faster than Devel::Cycle.

HOMEPAGE

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

SOURCE

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

BUGS

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

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) 2015 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.