Question: How to find all occurrences of a key in a deeply nested structure?

Here's what the object might look like in a Data::Dumper output:

$VAR1 = {
       'foo' => {
                 'child1' => { 
                              'gchild1' => {
                                            'values' => {
                                                         'bar1' => 1,
                                                         'bar2' => 1
                                                        }
                                           }
                             },
                 'child2' => {
                              'gchild1' => {
                                            'values' => {
                                                         'bar1' => 1,
                                                         'bar9' => 1
                                                        }
                                           },
                              'gchild2' => {
                                            'values' => {
                                                         'bar2' => 1,
                                                         'bar3' => 1
                                                        }
                                           }
                             },
                 'child3' => {
                              'values' => {
                                           'bar1' => 1,
                                           'bar2' => 1,
                                           'bar4' => 1,
                                           'bar5' => 1
                                          }
                             }
               }
        };

[download]

So the goal is to scan the hash of hashes and return all the references of 'values' most likely as an array of hashrefs. Notice 'values' can be a child of a grandchild, or the grandchild itself (as in child3). There may also be great-great-...-grandchildren. Basically, it could be anywhere in the chain.



Demize

In reply to How to find all occurrences of a key in a deeply nested structure? by deMize

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