> An *internal* definition differs slightly from a local definition > in syntax and *semantics*: > > (define (foo x) > (define i 10) > (define j 12) > (+ i j x)) > > It's preferable to local defines for aesthetic reasons because it > consumes less horizontal space (a smaller indentation).
On the other hand, the ~corresponding let form shows very clearly the
scope of the newly-bound identifiers (and most editors make it very easy
to highlight the whole let form in one swoop), which I've found useful
in explaining lexical scope.
But you've taught a heck of a lot more people to scheme than I have...
--
Jim Wise
[email protected]
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