Contents

module Transpose

let transpose (rows: string list): string list =
    let transposedCoordinates =
        rows
        |> List.mapi (fun row str -> str |> Seq.mapi (fun col char -> (col, (row, char))) |> List.ofSeq)
        |> List.concat

    let groupedByTransposedColumns =
        transposedCoordinates
        |> List.groupBy fst
        |> List.map (fun (row, chars) -> (row, chars |> List.map snd))

    let transposedColToRow (input: (int * char) list) =
        let maxCol = input |> List.map fst |> List.max
        let findCharacter col = 
            match List.tryFind (fun (c, _) -> c = col) input with
            | Some y -> snd y
            | None -> ' '

        [| 0..maxCol |] 
        |> Array.map findCharacter
        |> System.String

    groupedByTransposedColumns
    |> List.map (snd >> transposedColToRow)

Version data entries

77 entries across 77 versions & 1 rubygems

Version	Path
trackler-2.2.1.180	tracks/fsharp/exercises/transpose/Example.fs
trackler-2.2.1.179	tracks/fsharp/exercises/transpose/Example.fs
trackler-2.2.1.178	tracks/fsharp/exercises/transpose/Example.fs
trackler-2.2.1.177	tracks/fsharp/exercises/transpose/Example.fs
trackler-2.2.1.176	tracks/fsharp/exercises/transpose/Example.fs
trackler-2.2.1.175	tracks/fsharp/exercises/transpose/Example.fs
trackler-2.2.1.174	tracks/fsharp/exercises/transpose/Example.fs
trackler-2.2.1.173	tracks/fsharp/exercises/transpose/Example.fs
trackler-2.2.1.172	tracks/fsharp/exercises/transpose/Example.fs
trackler-2.2.1.171	tracks/fsharp/exercises/transpose/Example.fs
trackler-2.2.1.170	tracks/fsharp/exercises/transpose/Example.fs
trackler-2.2.1.169	tracks/fsharp/exercises/transpose/Example.fs
trackler-2.2.1.167	tracks/fsharp/exercises/transpose/Example.fs
trackler-2.2.1.166	tracks/fsharp/exercises/transpose/Example.fs
trackler-2.2.1.165	tracks/fsharp/exercises/transpose/Example.fs
trackler-2.2.1.164	tracks/fsharp/exercises/transpose/Example.fs
trackler-2.2.1.163	tracks/fsharp/exercises/transpose/Example.fs
trackler-2.2.1.162	tracks/fsharp/exercises/transpose/Example.fs
trackler-2.2.1.161	tracks/fsharp/exercises/transpose/Example.fs
trackler-2.2.1.160	tracks/fsharp/exercises/transpose/Example.fs