title: Remove null from vector
body: <p>I would like to remove nulls from a vector</p>
  
  <pre><code>      a:(2013.05.20 2013.05.21 2013.05.22 0N 0N 2013.05.23)
  </code></pre>
  
  <p>I can see how this can be done by creating a table using </p>
  
  <pre><code>      temp:([] a);
        result:exec a from temp where not null a;
  </code></pre>
  
  <p>but I am curious if there is a quicker way that doesn't involve creating a table.</p>
  
  <p>Thanks</p>