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kos59125/duplicate.fsx

Created February 4, 2020 09:18
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duplicate.fsx
open System.Text
let append : string list -> string =
List.fold (fun (builder:StringBuilder) -> builder.Append) (StringBuilder())
>> fun builder -> builder.ToString()
// aA
append ["a"; "A"] |> printfn "%s"
// aAbB
append ["b"; "B"] |> printfn "%s"
// aAbBcC
append ["c"; "C"] |> printfn "%s"
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