title: "type of expression is ambiguous without more context" with an array
body: <p>I am in xCode 7.3 playground and learning Swift 2.0.</p>
  
  <p>I have an array as follows:</p>
  
  <pre><code>var arrayName:Array = [1, 2, 3, 4, "Mike"]
  </code></pre>
  
  <p>And i'm getting the following error:</p>
  
  <blockquote>
    <p>type of expression is ambiguous without more context</p>
  </blockquote>
  
  <p>Now when i remove the string from the array the error disappears, however apparently Swift allows multiple types in arrays so I dont understand why its erroring?</p>
  
  <p>any ideas?</p>
  
  <p>cheers</p>