[plt-scheme] pseudo statics

HtDP, chapter VII (and VIII, and Intermezzo).


On Jul 1, 2009, at 1:46 PM, Hugh Myers wrote:

> Somewhere is a discussion about code like:
>
> (define counter
>     (let ((a 0))
>       (lambda ()
>         (set! a (+ 1 a))
>         a)))
>
> I just can't remember where! Anyone have any useful pointers or such?
>
> --hsm
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