title: How can I create an Observer over a dynamic list in RxJava?
body: <p>I need to create an Observer over an array which is constantly changing (adding elements).</p>
  
  <p>I am using Obserable.from(Iterable) but it seems that it creates the Observable over the ArrayList as it is at the moment of the creation.</p>
  
  <p>I need the Observer to be notified and the Action to be executed everytime the ArrayList gets a new element added.</p>