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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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Task/Fibonacci-sequence/Idris/fibonacci-sequence-1.idris Normal file
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fibAnalytic : Nat -> Double
fibAnalytic n =
floor $ ((pow goldenRatio n) - (pow (-1.0/goldenRatio) n)) / sqrt(5)
where goldenRatio : Double
goldenRatio = (1.0 + sqrt(5)) / 2.0

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Task/Fibonacci-sequence/Idris/fibonacci-sequence-2.idris Normal file
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fibRecursive : Nat -> Nat
fibRecursive Z = Z
fibRecursive (S Z) = (S Z)
fibRecursive (S (S n)) = fibRecursive (S n) + fibRecursive n

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Task/Fibonacci-sequence/Idris/fibonacci-sequence-3.idris Normal file
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fibIterative : Nat -> Nat
fibIterative n = fibIterative' n Z (S Z)
where fibIterative' : Nat -> Nat -> Nat -> Nat
fibIterative' Z a _ = a
fibIterative' (S n) a b = fibIterative' n b (a + b)

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Task/Fibonacci-sequence/Idris/fibonacci-sequence-4.idris Normal file
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fibLazy : Lazy (List Nat)
fibLazy = 0 :: 1 :: zipWith (+) fibLazy (
case fibLazy of
(x::xs) => xs
[] => [])