title: Efficient boolean reductions `any`, `all` for PySpark RDD?
body: <p>PySpark supports common reductions like <code>sum</code>, <code>min</code>, <code>count</code>, ...  Does it support boolean reductions like <code>all</code> and <code>any</code>?  </p>
  
  <p>I can always <code>fold</code> over <code>or_</code> and <code>and_</code>  but this seems inefficient.</p>