What’s New in F# 6 | Hacker News Reader

What’s New in F# 6

devblogs.microsoft.com

47 pointspaavohtl6 comments

Really happy to see the task improvements. Simpler and more performant. Can’t beat that when improving interop with .NET.

I'm seriously loving F#. It's a steep learning curve from an OO background but it just feels more ergonomic to use.

look at this garbage syntax,

  let readFilesTask (path1, path2) =
     async {
          let! bytes1 = File.ReadAllBytesAsync(path1) |> Async.AwaitTask
          let! bytes2 = File.ReadAllBytesAsync(path2) |> Async.AwaitTask
          return Array.append bytes1 bytes2
     } |> Async.StartAsTask

async await.. so ugly. I have a heard time getting excited at this "state of the art" when parallel processing in Erlang is so ubiquitous and native.

that's the old syntax

Indeed, newer syntax is much cleaner!

That's because an async computation is not a task. So use the task computation either through a nuget on < F# 6.0 or build in >= F# 6.0

  let readFilesTask (path1, path2) =
     task {
          let! bytes1 = File.ReadAllBytesAsync(path1)
          let! bytes2 = File.ReadAllBytesAsync(path2)
          return Array.append bytes1 bytes2
     }

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