[racket] Newbie question - Drscheme hangs on directory-exists?

Entering 'directory-exists?' in the search box at
http://docs.racket-lang.org/ (equivalently, use the Help Desk) gives
me one answer. Is the issue that the search is not good enough (it
could be better but it is pretty good) or that the docs don't have
enough context and examples?

N.

On Thu, Jul 22, 2010 at 9:27 AM, John Sampson <jrs.idx at ntlworld.com> wrote:
> I haven't really found my way round the documentation yet. I find that if I
> want to look up "directory-exists?"
> using Google in Mozilla Firefox is the best way.
>
> Regards
>
> _John Sampson_