title: Accessing array of object in Angular 2 Observable
body: <p>I'm new to Angular 2. I have an observable object, called employees. How to extract the Employee array from that Observable? <br>
  (let's say, because I need to perform operation on particular index) :</p>
  
  <pre><code>employees:Observable&lt;Employees[]&gt;;
  </code></pre>
  
  <p>And I'm intended to be</p>
  
  <pre><code>empArr:Employee[];
  empArr = employees.somethingToConvertToArray(); // this is what I intended
  </code></pre>
  
  <p>I've tried with .subscribe or .map, but I think I'm going to wrong direction.</p>