title: Javascript regex compared to Perl regex
body: <p>I'm just a noob when it comes to regexp. I know Perl is amazing with regexp and I don't know much Perl.  Recently started learning JavaScript and came across regex for
  validating user inputs... haven't used them much.</p>
  <p>How does JavaScript regexp compare with Perl regexp? Similarities and differences?<br />
  Can all regexp(s) written in JS be used in Perl and vice-versa?<br />
  Similar syntax?</p>