問題 2.34
(define (accumulate op initial sequence) (if (null? sequence) initial (op (car sequence) (accumulate op initial (cdr sequence))))) (define (horner-eval x coefficient-sequence) (accumulate (lambda (this-coeff higher-terms) (+ this-coeff (* x higher-terms))) 0 coefficient-sequence)) (horner-eval 2 (list 1 3 0 5 0 1)) ;-> 79