title: Add a new property at the beginning of a JSON object
body: <p>I have this JSON:</p>
  
  <pre><code>var myVar = {
       "9":"Automotive &amp; Industrial",
       "1":"Books",
       "7":"Clothing"
  };
  </code></pre>
  
  <p>I want to add a new element at the beginning, I want to end up having this:</p>
  
  <blockquote>
  <pre><code>var myVar = {
       "5":"Electronics",
       "9":"Automotive &amp; Industrial",
       "1":"Books",
       "7":"Clothing"
  };
  </code></pre>
  </blockquote>
  
  <p>I tried this but it is not working:</p>
  
  <pre><code>myVar.unshift({"5":"Electronics"});
  </code></pre>
  
  <p>Thanks!</p>