[plt-scheme] Closures

Howdy List,

Can someone give me an intuitive idea of closures, perhaps a clever
analogy or metaphor?

My question is really motivated by some confusing usage: I understand
what a closure is frome set perspective, but people speak of closures
as though they are something function-like, as in one can invoke a
closure.  Schemers speak of "using closures" fairly often.

Please direct me to a relevant FAQ ;)

Thanks,
Joel
-- 
Joel J. Adamson
Biostatistician
Pediatric Psychopharmacology Research Unit
Massachusetts General Hospital
Boston, MA  02114
(617) 643-1432
(303) 880-3109


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