title: How to fix "Extra argument 'at' in call" in swift's playground
body: <p>I've got a problem with some code. While I was writing function to define variables in a table I had an "Extra argument 'at' in call" error. I was trying many, many things (including rewritting code from Udemy lesson) and sadly it is not working still.</p>
  
  <p>Here's the code:</p>
  
  <pre><code>var tablica = [0,0,0,0,0,0]
  
  func przypisywanie (position: Int) {
     tablica.insert(Int(arc4random() % 49) + 1, at: position ) {
     }
  }
  </code></pre>
  
  <p>Thanks</p>
  
  <p>Btw sorry if it is a silly question, but I'm complete beginner.</p>