NAME DD - Dump data structure for debugging VERSION This document describes version 0.006 of DD (from Perl distribution DD), released on 2019-08-08. SYNOPSIS To install this module, currently do: % cpanm -n DD::Dummy In your code: use DD; # exports dd(), dd_warn(), dd_die(), dmp() ... dd $data ; # prints data to STDOUT, return argument my $foo = dd $data ; # ... so you can use it inside expression my $foo = dd_warn $data ; # just like dd() but warns instead dd_die $data ; # just like dd() but dies instead my $dmp = dmp $data ; # dump data as string and return it On the command-line: % perl -MDD -E'...; dd $data; ...' DESCRIPTION "DD" is a module with a short name you can use for debugging. It provides "dd" which dumps data structure to STDOUT, as well as return the original data so you can insert "dd" in the middle of expressions. It also provides "dd_warn", "dd_die", as well as "dmp" for completeness. "DD" can use several kinds of backends. The default is Data::Dump which is chosen because it's a mature module and produces visually nice dumps for debugging. You can also use these other backends: * Data::Dmp Optional dependency. Compact output. * Data::Dump::Color Optional dependency. Colored output. * Data::Dump::PHP Optional dependency. See also: PHP::Serialization. * Data::Dumper Optional dependency. A core module. * Data::Dumper::Compact Optional dependency. * Data::Format::Pretty::Console Optional dependency. Colored output. * Data::Format::Pretty::SimpleText Optional dependency. * Data::Format::Pretty::Text Optional dependency. Colored output. * Data::Printer Optional dependency. Colored output. * JSON::Color Optional dependency. Colored output. Note that the JSON format cannot handle some kinds of Perl data (e.g. typeglobs, recursive structure). You might want to "clean" the data first before dumping using Data::Clean::ForJSON. * JSON::MaybeXS Optional dependency. Note that the JSON format cannot handle some kinds of Perl data (e.g. typeglobs, recursive structure). You might want to "clean" the data first before dumping using Data::Clean::ForJSON. * JSON::PP Optional dependency, a core module. Note that the JSON format cannot handle some kinds of Perl data (e.g. typeglobs, recursive structure). You might want to "clean" the data first before dumping using Data::Clean::ForJSON. * PHP::Serialization Optional dependency. Compact output. See also: "Data::Dump::PHP". * YAML Optional dependency. * YAML::Tiny::Color Optional dependency. Colored output. Note that this dumper cannot handle some kinds of Perl data (e.g. recursive references). You might want to "clean" the data first before dumping using Data::Clean or Data::Clean::ForJSON. PACKAGE VARIABLES $BACKEND The backend to use. The default is to use "PERL_DD_BACKEND" environment variable or "Data::Dump" as the fallback default. FUNCTIONS dd Print the dump of its arguments to STDOUT, and return its arguments. dd_warn Warn the dump of its arguments, and return its arguments. If you want a full stack trace, you can use Devel::Confess, e.g. on the command-line: % perl -d:Confess -MDD -E'... dd_warn $data;' dd_die Die with the dump of its arguments as message. If you want a full stack trace, you can use Devel::Confess, e.g. on the command-line: % perl -d:Confess -MDD -E'... dd_die $data;' dmp Dump its arguments as string and return it. ENVIRONMENT PERL_DD_BACKEND Can be used to set the default backend. HOMEPAGE Please visit the project's homepage at . SOURCE Source repository is at . BUGS Please report any bugs or feature requests on the bugtracker website 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 XXX - basically the same thing but with different function names and defaults. I happen to use "XXX" to mark todo items in source code, so I prefer other names. AUTHOR perlancar COPYRIGHT AND LICENSE This software is copyright (c) 2019, 2017 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.