title: Referring an element in json with a - in key
body: <p>I've a valid json of the following format.I want to be able to print the value of desc.</p>
  
  <pre><code> var obj = 
      {
          "x-internal": {
              "name": {
                  "desc": "abc"
              }
          }
      }
  
  console.log(" Val :"+obj.x-hooks.warehouse.desc);
  </code></pre>
  
  <p>I get a reference error saying hooks is not defined.</p>