title: What does $0 and $1 mean in Swift Closures?
body: <pre><code>let sortedNumbers = numbers.sort { $0 &gt; $1 }
  print(sortedNumbers)
  </code></pre>
  
  <p>Can anyone explain, what <code>$0</code> and <code>$1</code> means in swift?</p>
  
  <p>More Sample</p>
  
  <pre><code>array.forEach {
      actions.append($0)
  }
  </code></pre>