title: Cannot convert value of type 'Int' to expected argument type '@noescape (Int?) throws -> Bool'
body: <p>I am wanting to check to see if the <code>smallestArr</code> contains -1, and if it contains at least one -1, call placeBlocks. I need to keep calling placeBlocks until the array fills up meaning they lost the game.</p>
  
  <p>The error I receive is </p>
  
  <blockquote>
    <p>Cannot convert value of type 'Int' to expected argument type
    '@noescape (Int?) throws -> Bool'</p>
  </blockquote>
  
  <pre><code>var smallestArr = [Int?](count: 25, repeatedValue: -1)
  
  while smallestArr.contains(-1){
      placeBlocks()
  }
  </code></pre>