Acme-CPANModules-DumpingDataForDebugging
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NAME
Acme::CPANModules::DumpingDataForDebugging - List of modules and tips
when dumping data structures for debugging
VERSION
This document describes version 0.002 of
Acme::CPANModules::DumpingDataForDebugging (from Perl distribution
Acme-CPANModules-DumpingDataForDebugging), released on 2023-10-29.
DESCRIPTION
This list catalogs some of the modules you can you to dump your data
structures for debugging purposes, so the modules will be judged mostly
by the appropriateness of its output for human viewing (instead of other
criteria like speed, footprint, etc).
ACME::CPANMODULES ENTRIES
Data::Dumper
Author: NWCLARK <https://metacpan.org/author/NWCLARK>
Everybody knows this module and it's core so sometimes it's the only
appropriate choice. However, the default setting is not really
optimized for viewing by human. I suggest you tweak these before
dumping your data:
* Set $Data::Dumper::Useqq to 1.
By default, Data::Dumper quotes strings using single-quotes and does
not quote things like "\n" and "\b" making it difficult to spot
special characters.
Data::Dump
Author: GARU <https://metacpan.org/author/GARU>
A data dumper that produces nicer Perl code output, with features
like vertical alignment of "=>" when dumping hashes, compacting
sequences like 1,2,3,4,5,6 to 1..6, compacting repeating characters
in string like "ccccccccccccccccccccc" to ("c" x 21), and so on.
It tries harder to produce Perl code that generates the original
data structure, particularly with circular references. But with
interlinked references like trees, Data::Dumper might be more
helpful in showing you which references get mentioned where. For
example this data:
$tree = {children=>[{children=>[{}]}, {children=>[]}]};
$tree->{children}[0]{parent}=$tree;
$tree->{children}[1]{parent}=$tree;
$tree->{children}[0]{children}[0]{parent} = $tree->{children}[0];
Data::Dump will produce:
do {
my $a = {
children => [
{ children => [{ parent => 'fix' }], parent => 'fix' },
{ children => [], parent => 'fix' },
],
};
$a->{children}[0]{children}[0]{parent} = $a->{children}[0];
$a->{children}[0]{parent} = $a;
$a->{children}[1]{parent} = $a;
$a;
}
while Data::Dumper will produce:
$VAR1 = {
'children' => [
{
'children' => [
{
'parent' => $VAR1->{'children'}[0]
}
],
'parent' => $VAR1
},
{
'parent' => $VAR1,
'children' => []
}
]
( run in 0.725 second using v1.01-cache-2.11-cpan-56fb94df46f )