title: Cannot subscript a value of type 'Set<String>' with an index of type 'Int'
body: <p>I am having a Set of Strings which have some data in it. 
  But when I was showing data from the set to the tableView, in cellForRowAtIndexPath method it gives me above stated error.
  Here is my Code:</p>
  
  <pre><code>var tradeSet: Set&lt;String&gt; = ["TKAI", "YNDX", "PSTG"]
  
  func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -&gt; UITableViewCell {
      let cell = tableView.dequeueReusableCellWithIdentifier("MyTrade", forIndexPath: indexPath) as! MyTradeTableViewCell
  
      let objects = tradeSet[indexPath.row]
      cell.tradeName.text = objects
  
      return cell
  }
  </code></pre>
  
  <p>Any help would be great. Thank you!</p>