title: how to loop through elements of array of <UnsafeMutablePointer> in Swift
body: <p>I am new to Swift and wanted to loop through an array of <code>MKMapPoints&lt;UnsafeMutablePointer&gt;</code> which I get from an <code>MKPolygon</code> by calling <code>myPoly.points()</code>.
  However, I am stuck as to how to loop through every element of the C-Array of pointers.</p>
  <pre><code>for element in myPointsArray {} 
  </code></pre>
  <p>does not work and I don't know how to determine the number of elements of this kind of array in Swift. Any ideas? Thanks for your help!</p>