title: How to add Array join method inside an object in JavaScript?
body: <pre><code>var person = {  
  address: [
      '308 Congress Street',
      'Boston',
      'Massachusetts'
  ]
  }
  </code></pre>
  
  <p>How to insert Array join method in <code>"address"</code> and display all Array item.</p>
  
  <p>The result would be like this: <code>308 Congress Street, Boston, Massachusetts</code></p>