CODEWITHSUNDEEP
f#f#-data
MmM
MmM

Reputation: 3581

Parsing a very simple CSV and printing the first column in F#

I'm trying to write the following C# code to F#:

List<string> addresses = File.ReadLines(CsvPath).Select(x => x.Split(';')[0]).Distinct().ToList();
addresses.ForEach(a => Console.WriteLine(a));

This is what I've come up with:

let addresses = File.ReadLines(CsvPath) |> Seq.iter (fun s1 ->
    s1.Split [|';'|].[0]
    |> Console.WriteLine
)

However this outputs System.String[] instead of the first string value of the line...

Upvotes: 0

Views: 70

Answers (1)

TeaDrivenDev
TeaDrivenDev

Reputation: 6629

You need to put the argument of s1.Split in parentheses, so you actually index on the result, not the argument.

let addresses = 
    File.ReadLines(CsvPath)
    |> Seq.iter (fun s1 ->
        s1.Split([|';'|]).[0]
        |> Console.WriteLine)

Upvotes: 1

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