title: What is the difference between switchLatest and flatmapLastest in RxJs
body: <p>I am having difficulty in seeing the difference between switchLatest and flatmapLatest in RxJs with the difference being one flattens a nested observable affer the fact like in scala whilst the other is the equivalent of doing it before returning the new flattened collection?</p>
  
  <p>Am I missing something. </p>