title: Swift 3: Iterate through a _NSSingleObjectArrayI
body: <p>I'm fetching data from a weather API. I'm not sure how to access the description?</p>
  
  <pre><code>"weather": &lt;__NSSingleObjectArrayI 0x608000012910&gt;(
  {
      description = "overcast clouds";
      icon = 04n;
      id = 804;
      main = Clouds;
  }
  )
  </code></pre>
  
  <p>I tried:</p>
  
  <pre><code>print(weatherDict["weather"]!.description!)
  </code></pre>
  
  <p>It just gave me this:</p>
  
  <pre><code>(
      {
      description = "overcast clouds";
      icon = 04n;
      id = 804;
      main = Clouds;
    }
  )
  </code></pre>
  
  <p>How do I properly access the description?</p>