title: Access object by address / pointer
body: <p>Can I access data.table object created in current R session by its memory address or pointer?</p>
  
  <pre><code>library(data.table)
  
  DT &lt;- data.table(a = 1:10, b = letters[1:10])
  address(DT)
  # [1] "0x6bf9b90"
  attr(DT,".internal.selfref",TRUE)
  # &lt;pointer: 0x2655cc8&gt;
  </code></pre>