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 ...) ))
On Friday, 6 March 2020 04:01:46 UTC+7, Daniel
Hint:
(define (words-on-line llos)
(match llos
['() empty]
[(list a b ...) ))
Dan
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