Greetings, monks, who are so wise in the ways of science.*

I have a HoHoH... that looks something like this: 

$VAR1 = {
          '1' => {
                   '1a' => {}
                 },
          '2' => {
                   '2a' => {
                            '2b' => {}
                           }
                   '2c' => {},
                 }
        };

[download]

I need to walk through this structure and identify one or more elements that meet certain criteria. Once I find the element(s), I need to report not just the element name(s) (e.g., 2a) but also the path(s) to that element (e.g., 2 -> 2a).

I vaguely recall reading about similar problems but I suspect they focused on only traversing the structure - my searches turned up empty. I could brute-force this, but it seems like a module might already exist to do it (perhaps something along the lines of Algorithm::Loops?).

Suggestions and/or snippets are greatly appreciated. Thanks in advance.

Update: Thanks for the responses. jdporter's example gave me a good starting point.

*With proper attribution (and apologies) to Monty Python and the Holy Grail, of course. :-)

In reply to Recursive traversal of a HoH... and paths by bobf

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