我想从一系列套装中打电话给set-union。我如何将其转换为set-union将采用的形式?
set-union
(define (return-set-list) (list (set 1) (set 2))) (set-union (set) (return-set-list))
例如,这会返回错误。
你可以使用apply
apply
(apply set-union (cons (set) (return-set-list)))