title: Delete items from list of list
body: <p>This is my original array:</p>
  
  <pre><code>b = [[], [1], [22, 132], [3, 123], [], [], [6], [], [], [89]]
  </code></pre>
  
  <p>This is what i want:</p>
  
  <pre><code>b = [[], [], [], [], [], [], [], [], [], []]
  </code></pre>