24 lines
567 B
Text
24 lines
567 B
Text
#check @Array.mk
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def v : Array Nat := @Array.mk Nat 10 (fun ⟨i, _⟩ => i)
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def w : Array Nat :=
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(mkArray 9 1).push 3
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def f : Fin w.sz → Nat :=
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Array.casesOn w (fun _ f => f)
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def arraySum (a : Array Nat) : Nat :=
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a.foldl Nat.add 0
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#exit
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#eval mkArray 4 1
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#eval Array.map (fun x => x+10) v
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#eval f ⟨1, sorry⟩
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#eval f ⟨9, sorry⟩
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#eval (((mkArray 1 1).push 2).push 3).foldl 0 (+)
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#eval arraySum (mkArray 10 1)
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#eval (mkArray 10 1).data ⟨1, decTrivial⟩ + 20
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#eval (mkArray 10 1).data ⟨2, decTrivial⟩
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#eval (mkArray 10 3).data ⟨2, decTrivial⟩
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