title: Rxjs Subject/Observable subscribe Array of list
body: <p>I have one easy question.
  I have service <code>DataStorageServiceService</code> and in this service I have <code>shopCartProtudct = new Subject&lt;ProductModel[]&gt;();</code>.
  I have component <code>SingleProductComponent</code> and from this component I want sent data sent data in to <code>shopCartProtudct</code> but like array, I want to interact with interact <code>shopCartProtudct</code> like basic array, than means, I want to store data and delete. This is posible? </p>