I think I understand the following example from the documentation:
(define (example)
(for/fold ([sum 0]
[averages null]) ;; 2 accums named sum and rev-roots are
initialized
([i '(1 2 3 4)]) ;; i will iterate over 1..4
(values
(+ sum i) ;; adding to sum
(cons (sqrt i) averages) ;; consing to rev-roots
)))
(example) ->
10
'(2 1.7320508075688772 1.4142135623730951 1)
But I realize I don't really understand when I try the following:
(define (example2)
(for/fold ([sum 0]
[averages null])
([i '(1 2 3 4)])
(values
(+ sum i) ;; adding to sum
(cons (/ sum i) averages) ;; record running average but sum is
not what I think it should be
)))
(example2) ->
10
'(1 1/2 1 1/2 0)
Not reducing for readability, I was hoping for
(10/4 6/3 3/2 1)
How can I tweak the code?
jGc
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