title: How to remove a row from a 2d array?
body: <p>I have a simple array, sort of like this:</p>
  <pre><code>1 2 3 4 5 6 7 8 9
  6 2 7 2 9 6 8 10 5
  2 6 4 7 8 4 3 2 5
  9 8 7 5 9 7 4 1 10
  5 3 6 8 2 7 3 7 2
  </code></pre>
  <p>So, let's call this <code>matrix[5][9]</code>. I wish to now remove every row within this matrix that contains a certain value, in this case <code>10</code>, so I am left with...</p>
  <pre><code>1 2 3 4 5 6 7 8 9
  2 6 4 7 8 4 3 2 5
  5 3 6 8 2 7 3 7 2
  </code></pre>