Hi, I'm new to Ruby programming and I just upgraded from 1.6.8 to 1.8.0 
preview3.  I noticed that I can no longer define global variables like 
$3somevar (an example of the error I get is attached below).  Ruby 1.8 
seems to complain about the 3 following the $ where it was perfectly 
fine with it in 1.6.8.  Is there a reason for this?  Thanks.

Regards,
Donglai

------------------------------------------------------------
%ruby example.rb
example.rb:1: warning: useless use of a variable in void context
example.rb:1: syntax error
$3somevar = "whatever"
                    ^