In racket, the proc apply-or is needed. > (or #f 1 2 #f 3 4 #f) 1 > (apply or (list #f 1 2 #f 3 4 #f)) . or: bad syntax in: or > (define (apply-or lst) (foldr or #t lst)) . or: bad syntax in: or > (define (apply-or lst) (foldr (lambda (x y) (or x y)) #t lst)) > (apply-or (list #f 1 2 #f 3 4 #t)) 1 > (foldl (lambda (x y) (or x y)) #t (list #f 1 2 #t 3 4 #t)) #t
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