title: How to clear Observable<Array[]> in Angular?
body: <p>I want to clear an observable object array. What I did:         </p>
  
  <pre><code>private pages: Observable&lt;CustomPage[]&gt;;
  //clear
  this.pages.map(p =&gt; p = []);
  </code></pre>
  
  <p>Is there a direct Observable method(rxjs) to do this without mapping?</p>