title: Angular repetition of two rows instead of single row
body: <p>I need to have an <code>*ngFor</code> of table rows, where each repetition consists in 2 rows, as shown <a href="http://jsfiddle.net/Pgschr/b1yc7oqv/" rel="nofollow noreferrer">here</a>.</p>
  <p>But in Angular the repetition is done for each row, not each 2:</p>
  <pre><code>&lt;table&gt;
     &lt;tr *ngFor=&quot;let row of rows; let i = index&quot;&gt;
         &lt;td&gt;{{row.somethingA}}&lt;/td&gt;
         &lt;td&gt;{{row.somethingB}}&lt;/td&gt;
     &lt;/tr&gt; 
  &lt;/table&gt;
  </code></pre>
  <p>What is the best way to approach this?</p>