title: How to visualize Hash data structure in ruby?
body: <p>I have a hash object, whose structure looks similar to this:</p>
  
  <pre><code>{:category1 =&gt; 
   {:subcategory1 =&gt; 
    [ 
     {:article =&gt; "some article", :date =&gt; "2010-04-04"},
     ...
    ],
    :subc2 =&gt; [...] 
   },
   :category2 =&gt; {...},
   ...
  }
  </code></pre>
  
  <p>How can I visualize it as graph in ruby?</p>
  
  <p>Is there a simple method/gem/lib that converts this Hash to DOT?</p>