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@mcmillhj mcmillhj/type-example.sml
Last active Jan 4, 2017

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(* fn: ('a -> 'b) -> 'a list -> 'b list *)
fun accumulate _ [] = []
| accumulate f (x::xs) = f x :: accumulate f xs
(* fn: ('a -> 'b) * 'a -> 'b list *)
fun accumulate (f: ('a -> 'b), xs: 'a list): 'b list =
raise Fail "'accumulate' has not been implemented"
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