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For an alternate and very different explanation, see mine at http://www.mail-archive.com/boston-pm@mail.pm.org/msg02716.h.... It does it in 3 steps.



Your explanation is great!

As a third option, if you'd like to have the relevant CS terminology, see Matt Might's derivation, also in JavaScript, at http://matt.might.net/articles/implementation-of-recursive-f....


Thanks for the link. Really nice resource on CS stuff.




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