title: Swift: Declaring empty tuples
body: <p>What's the correct way to declare an empty tuple?</p>
  
  <ul>
  <li>For Arrays: <code>var myArr : [String] = []</code></li>
  <li>For tuples: <code>var myTuple: (key: String, val: Int) = ()</code> ?</li>
  </ul>
  
  <p>Is there a correct way to achieve this?</p>