title: Lua - get table hex identifier
body: <p>I want to know how to get the table hex id. I know that doing:</p>
  
  <pre><code>local some_var = {}
  print (some_var)
  </code></pre>
  
  <p>the result is (for instance):</p>
  
  <pre><code>table: 0x21581c0
  </code></pre>
  
  <p>I want the hex without the <code>table:</code> string. I know that maybe some of you suggest me to make a regular expression (or something similar) to remove those chars, but I want to avoid that, and just get the <code>0x21581c0</code></p>
  
  <p>Thanks</p>