title: regular expression to exclude filetypes from find
body: <p>When using <code>find</code> command in linux, one can add a <code>-regex</code> flag that uses emacs regualr expressions to match.</p>
  
  <p>I want find to look for all files except <code>.jar</code> files and <code>.ear</code> files. what would be the regular expression in this case?</p>
  
  <p>Thanks</p>