title: How to find the vectorized difference between two lists?
body: <p>Consider</p>
  <pre><code>x &lt;- c(1,2,3)
  y &lt;- c(1,0,3)
  x == y
  [1]  TRUE FALSE  TRUE
  </code></pre>
  <p>I would like to achieve the same result using lists:</p>
  <pre><code>x &lt;- list(c(11,11) ,c(22,22), c(33,33) )
  y &lt;- list(c(11,11) ,c(21,22), c(33,33) )
  x == y
  </code></pre>
  <p>But instead of
  <code>[1]  TRUE FALSE  TRUE</code>
  this gives the error message:</p>
  <p><code>Error in x == y : comparison of these types is not implemented</code></p>
  <p>How to find the vectorized difference between two lists?</p>
  <p>Performance must be considered.</p>