Question

I have this script

#!/usr/bin/perl
use warnings;
use strict;
use Data::Dumper;
use YAML::Syck;

my $x = {'x' => [1,2,3],
     'y' => {'z' => 8},
     'q' => 'abc',
};

my $yaml = YAML::Syck::Load($x);
print "\n" . $yaml . "\n\n\n";

my $h = YAML::Syck::Dump($yaml);
print Dumper $h;

which outputs

HASH(0x7539cb0)


$VAR1 = '--- HASH(0x7539cb0)
';

I’d expected to see the structure of $x which content. What’s wrong there?

Answer 1

You should use Dump to dump a Perl data structure into YAML and Load to do the opposite.
Try:

my $yaml = YAML::Syck::Dump($x);
print "\n" . $yaml . "\n\n\n";

my $h = YAML::Syck::Load($yaml);
print Dumper $h;