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Fibonacci numbers

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Pekka Laiho 2020-06-06 15:59:05 +07:00
parent 7348ec3229
commit fd5e846f2f
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; Functions to calculate Fibonacci numbers
; Slow recursive version
(def slowFib (fn (n) (if (< n 2) n (+ (slowFib (- n 1)) (slowFib (- n 2))))))
; Return the sum of the last 2 numbers in a sequence
(def sumOfLast (fn (l) (+ (last l) (get l (- (len l) 2)))))
; Faster version, return vector of n numbers
(def fibListRec (fn (n l) (if (< (len l) n) (fibListRec n (push l (sumOfLast l))) l)))
(def fibList (fn (n) (fibListRec n [0 1])))