I can’t find a simple working example of the use of Map.fold anywhere. I have seen the F# for fun and profit and the MSFT documents on ‘fold’.
Can you provide a short working example of the use of Map.fold?
Need F# Map.fold example
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1 Answers
let capitals =
[("Australia", "Canberra"); ("Canada", "Ottawa"); ("China", "Beijing");
("Denmark", "Copenhagen"); ("Egypt", "Cairo"); ("Finland", "Helsinki");
("France", "Paris"); ("Germany", "Berlin"); ("India", "New Delhi");
("Japan", "Tokyo"); ("Mexico", "Mexico City"); ("Russia", "Moscow");
("Slovenia", "Ljubljana"); ("Spain", "Madrid"); ("Sweden", "Stockholm");
("Taiwan", "Taipei"); ("USA", "Washington D.C.")]
|> Map.ofList
printfn "%A\n" capitals
printfn "%s"
(Map.fold
(fun acc key value -> (acc + "(" + key + "," + value + ")"))
""
capitals)
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