completely new to Perl. I have been struggling all day with the concept of references in hashes (ie when to use it?). my current problem is I made a hash that stores 3 elements: x, y, and an array associated with that coordinate. 
 
$lengths{$line}= {x=> $site[0], y=>$site[1], z=> \@data};

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I don't have an issue assigning the hash and using Data::Dumper I see that z is a reference. However, I cannot seem to retrieve the array to manipulate. Say I wanted to print each element in this array: 
for my $coord (keys %lengths) {
   for (@{$lengths{$coord}{z}}) {
      print "$_\n";
   }
}

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This gives me nothing. Is it because I am forcing scalar? Sample output from Data::Dumper 
$VAR57 = '10:36759286';
$VAR58 = {
           'reads' => $VAR2->{'reads'},
           'x' => '10',
           'y' => '36759286'

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edit: forgot the sigil thanks.

In reply to Help with array ref in hashes by diyaz

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