Create, populate and access a multi-dimensional array in Perl

Question

I have the data structure (given below), can you please let me know how to populate and also to access the elements in the simplest form anytime I want. Which is the best way to implement, like Hash of Hashes or Array of Arrays or anything else ? There won't be too many elements in the array, the only problem is the its a multi-level kind of array

%Array = (

    'Item0' => {
        'Name' => 'Item0_Name',
        'Attribs' => {
            'Attr1' => {
                'Name' => 'Attr1_Name',
                'Num'   => 'Attr1_Num'
            },      
            'Attr2' => {
                'Name' => 'Attr2_Name',
                'Num'   => 'Attr2_Num'
            }       
        }       
    },

    'Item1' => {
        'Name' => 'Item1_Name',
        'Attribs' => {
            'Attr1' => {
                'Name' => 'Attr1_Name',
                'Num'   => 'Attr1_Num'
            },      
            'Attr2' => {
                'Name' => 'Attr2_Name',
                'Num'   => 'Attr2_Num'
            }       
        }       
    }

);

perldoc perldsc

Zaid
– Zaid

2012-09-04 06:43:21 +00:00
Commented Sep 4, 2012 at 6:43 — Zaid
– Zaid, Commented Sep 4, 2012 at 6:43
Calling a hash Array is confusing.

choroba
– choroba

2012-09-04 07:40:32 +00:00
Commented Sep 4, 2012 at 7:40 — choroba
– choroba, Commented Sep 4, 2012 at 7:40

Zaid · Accepted Answer · 2012-09-04 07:39:37Z

The official resource for this is the Perl Data Structure Cookbook (perldoc perldsc).

For the data shown, it seems that an array of hashrefs is sufficient since the keys shown in the OP are simply a stringified index. The same comment applies for 'Attribs':

my @array = (
              {
                  'Name' => 'Item0_Name',
                  'Attribs' => [
                                  {
                                      'Name' => 'Attr1_Name',
                                      'Num'  => 'Attr1_Num'
                                  },      
                                  {
                                      'Name' => 'Attr2_Name',
                                      'Num'   => 'Attr2_Num'
                                  }       
                               ],
              },
              {
                  'Name' => 'Item1_Name',
                  'Attribs' => [
                                  {
                                      'Name' => 'Attr1_Name',
                                      'Num'  => 'Attr1_Num'
                                  },      
                                  {
                                      'Name' => 'Attr2_Name',
                                      'Num'   => 'Attr2_Num'
                                  }       
                               ],
              },
           );

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