[plt-scheme] evaluating buffer w/o re-initializing environment?

On Mar 29, 2009, at 15:38, Anthony Cowley wrote:

> For another example, using environments such as Impromptu
> <http://impromptu.moso.com.au/manual.html> to fine tune visual
> displays is a truly fantastic experience.

Thanks for mentioning Impromptu, I'd forgotten about it.  Impromptu  
and Processing make an interesting comparison.