Thanks. I initially tried as below with first pattern [empty empty] and
empty apparently is a variable that will match a non-empty list. I need to
use '*()*
(define (words-on-line llos)
(match llos
[*empty* empty]
[(list a b ...) <recursive expression goes here>))
On Friday, 6 March 2020 04:01:46 UTC+7, Daniel Prager wrote:
>
> Hint:
>
> (define (words-on-line llos)
> (match llos
> ['() empty]
> [(list a b ...) <recursive expression goes here>))
>
> Dan
>
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