Parallel Letter Frequency

Challenge Overview

Count the frequency of letters in texts using parallel computation.

Visit the parallel-letter-frequency exercise on Exercism to read the full instructions and download the exercise files.

Community Solutions

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The following are the top 3 community solutions by stars:

Solution 1 by @ErikSchierboom (⭐ 2) — View on Exercism
Solution 2 by @aage (⭐ 0) — View on Exercism
Solution 3 by @Teilzeitdenker (⭐ 0) — View on Exercism

Source: Exercism fsharp/parallel-letter-frequency

💡 View Solution

module ParallelLetterFrequency

module Map =
    let merge = Map.fold (fun acc key value -> Map.add key ((Map.tryFind key acc |> Option.defaultValue 0) + value) acc)

let private asyncTextFrequency text = async {
    return
        text
        |> Seq.filter Char.IsLetter
        |> Seq.countBy Char.ToLower