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#lang racket
(require "../../shared/lists.rkt")
(define (fold-right op initial sequence)
(accumulate op initial sequence))
(define (fold-left op initial sequence)
(define (iter result rest)
(if (null? rest)
result
(iter (op result (car rest))
(cdr rest))))
(iter initial sequence))
((lambda ()
(newline)
(display (fold-right / 1 (list 1 2 3)))
(newline)
(display (fold-left / 1 (list 1 2 3)))
(newline)
(display (fold-right list '() (list 1 2 3)))
(newline)
(display (fold-left list '() (list 1 2 3)))))
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