title: Swift 2 - Regex validate User Name
body: <p>I am trying to validate a user name using a Regex in swift. I found the way to match the string if there are any not world or digit character however, I need to find the way to add in the regex an expression that tells me that the string length is between a range of <code>2...15</code> characters.</p>
  
  <p>How can I do this?</p>
  
  <pre><code>let name = Anthony 
  if let match = name.rangeOfString("[\\W]|[\\d]{2,15}$", options: .RegularExpressionSearch) {
      print(match)
  }
  </code></pre>