giles
f5ab66e1a3
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Complement to foldr-o. The combiner relation has signature
(acc head new-acc) — accumulator first.
Examples:
(foldl-o pluso-i (list 1 2 3 4 5) 0 q) -> (15)
(foldl-o *o-i (list 1 2 3 4) 1 q) -> (24)
(foldl-o (fn (acc x r) (conso x acc r)) ; flipped conso
(list 1 2 3 4) (list) q) -> ((4 3 2 1)) ; reverse
5 new tests, 510/510 cumulative.