title: ios nsrange char from end
body: <p>Let's say I have:</p>
  
  <p><code>this - is an - example - with some - dashes</code></p>
  
  <p><code>NSRange</code> will pick up the first instance of "-" with `rangeOfString:@"-" but what if I only want the last one?</p>
  
  <p>I'm looking for something that works similar to <code>lastIndexOf</code> in <code>JS</code>. <em>Thanks!</em></p>