Raul Miller-4 wrote:
>
>
> fold=: /
>
It is a bit more complicated:
foldl1 =: /
foldr1 =: ~/(@:|.)
as in:
- foldl1 1 2 3 4 NB. (1-(2-(3-4)))
_2
- foldr1 1 2 3 4 NB. (((1-2)-3)-4)
_8
but I (still) don't think there is an easy way to define foldl and foldr in
J.
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