Note: Lemmy code blocks don’t play nice with some symbols, specifically < and & in the following code examples

This isn’t a language level issue really though, Haskell can be equally ergonomic.

The weird thing about ?. is that it’s actually overloaded, it can mean:

• call a function on A? that returns B?
• call a function on A? that returns B

you’d end up with B? in either case

Say you have these functions

toInt :: String -> Maybe Int

double :: Int -> Int

isValid :: Int -> Maybe Int

and you want to construct the following using these 3 functions

fn :: Maybe String -> Maybe Int

in a Rust-type syntax, you’d call

str?.toInt()?.double()?.isValid()

in Haskell you’d have two different operators here

str >>= toInt <&> double >>= isValid

however you can define this type class

class Chainable f a b fb where
    (?.) :: f a -> (a -> fb) -> f b

instance Functor f => Chainable f a b b where
    (?.) = (<&>)

instance Monad m => Chainable m a b (m b) where
    (?.) = (>>=)

and then get roughly the same syntax as rust without introducing a new language feature

str ?. toInt ?. double ?. isValid

though this is more general than just Maybes (it works with any functor/monad), and maybe you wouldn’t want it to be. In that case you’d do this

class Chainable a b fb where
    (?.) :: Maybe a -> (a -> fb) -> Maybe b

instance Chainable a b b where
    (?.) = (<&>)

instance Chainable a b (Maybe b) where
    (?.) = (>>=)

restricting it to only maybes could also theoretically help type inference.

Here’s an example (first in Haskell then in Go), lets say you have some types/functions:

• type Possible a = Either String a
• data User = User { name :: String, age :: Int }
• validateName :: String -> Possible String
• validateAge :: Int -> Possible Int

then you can make

mkValidUser :: String -> Int -> Possible User
mkValidUser name age = do
  validatedName ← validateName name
  validatedAge  ← validateAge age
  pure $ User validatedName validatedAge

for some reason <- in lemmy shows up as <- inside code blocks, so I used the left arrow unicode in the above instead

in Go you’d have these

• (no Possible type alias, Go can’t do generic type aliases yet, there’s an open issue for it)
• type User struct { Name string; Age int }
• func validateName(name string) (string, error)
• func validateAge(age int) (int, error)

and with them you’d make:

func mkValidUser(name string, age int) (*User, error) {
  validatedName, err = validateName(name)
  if err != nil {
    return nil, err
  }

  validatedAge, err = validateAge(age)
  if err != nil {
    return nil, err
  }

  return User(Name: validatedName, Age: validatedAge), nil
}

In the Haskell, the fact that Either is a monad is saving you from a lot of boilerplate. You don’t have to explicitly handle the Left/error case, if any of the Eithers end up being a Left value then it’ll correctly “short-circuit” and the function will evaluate to that Left value.

Without using the fact that it’s a functor/monad (e.g you have no access to fmap/>>=/do syntax), you’d end up with code that has a similar amount of boilerplate to the Go code (notice we have to handle each Left case now):

mkValidUser :: String -> Int -> Possible User
mkValidUser name age =
  case (validatedName name, validateAge age) of
    (Left nameErr, _) => Left nameErr
    (_, Left ageErr)  => Left ageErr
    (Right validatedName, Right validatedAge) => 
      Right $ User validatedName validatedAge

For people unfamiliar with the vim ecosystem (I assume that’s at least part of the down votes), it’s actually much closer than you’d expect. If you’re only familiar with vi/vim, nvim customizations are essentially on feature parity with vscode, with the added benefit of the vim-first bindings.

What you have to do is install a customized neovim environment. Lunarvim, astrovim, nvchad, etc. Most of them have single line installation options for Linux, and then it comes with a bunch of plugins that will pretty much match whatever you’d find with vscode extensions.

I’m on Linux full time for programming and gaming. I play battle.net games (WoW, hearthstone, overwatch, HoTS, WoW classic), League of Legends, and a lot of steam games. I have virtually no issues. I have a ryzen 5900x and a RTX 3080.

The key to Linux gaming (outside of steam) is Lutris. You just search the game you want to install, and it installs all the dependencies needed automatically and you can launch the game from one place. They even have a simple 1 click button for adding steam games too if you want a single launcher for every game you have (this is what I do).

The only issues I really have are with EAC, like DKO didn’t work for a bit after it came out (but does now), and Valorant/Fortnite don’t work (they can easily enable Linux EAC but choose not to). I happen to not play these games so it’s a non-issue for me, but worth mentioning.

League of Legends is also worth mentioning as having more issues than the rest. Usually I can run the game for months or even a year+ with no issues, but earlier this year the game was virtually unplayable on Linux for about 6 days due to a bug Riot Games added. This bug also effected Windows users, but to a much less extent. They would get disconnected once every couple games, while Linux users would get disconnected once every couple minutes. The League of Linux community is amazing though, and people were troubleshooting it constantly and making it more and more playable (getting to Windows parity on the bug), until Riot Games fixed it on their end.

I even helped my brother swap from Windows to Linux recently. He isn’t super into Linux or anything, but he was having consistent issues on Windows with his monitor turning off in games, specifically League. We tried reinstalling drivers, watching temps, reinstalling League (since it didn’t happen in other games), and uninstalling certain apps that can add overlays (though they were disabled). Some of these issues seemed to fix it until it returned usually hours or days later. Eventually we gave Linux a try and the issue is entirely gone. It’s likely that resetting windows would work too, but he dual boots and it’s easier to not have to reinstall everything.