[plt-scheme] Undefine variable?

--- Zbyszek Jurkiewicz <zbyszek at duch.mimuw.edu.pl>
wrote:
> In some package I create at execution time a lot of
> variables and from 
> time to time want to garbage clean some of them.
> Variables are created
> by namespace-set-variable-value!

For this case would it not suffice to set the variable
value to void (or #f)?  That way the data will not be
referenced and can be garbage collected.

Noel

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