Mike wrote:
used to be quite fond of Forth. (I still like Forth in some ways although
it’s
been years since I used it. It’s awfully primitive by modern standards,
but I
always liked the way it lets you make your own language as you go.)
I while ago, embedded the ATLAST FORTH interpreter into Ruby as an
extension.
http://raa.ruby-lang.org/project/ratlast/
Though I am not sure that anyone is using it (including me … 
)
You will be able to reacquaint yourself with Forth though.
···
-mark.