title: Angular 5 - Add new line to a table, and make it editable
body: <p>I'm using a table to display the content of a collection, using <code>*ngFor = let item in collection</code>    </p>
  
  <p>On the bottom of the table, i have a button to add a new line, that redirects to my <code>addNewLine()</code> method.</p>
  
  <p>In this method, I want to make the new row editable, and to make each cell represents an attribute from my model object.</p>
  
  <p>I already added the new line,by making a <code>push(this.myModelObject)</code> but, I can't make it editable.</p>
  
  <p>Thanks</p>