this post was submitted on 16 Dec 2023
71 points (85.9% liked)

Programming

17028 readers
249 users here now

Welcome to the main community in programming.dev! Feel free to post anything relating to programming here!

Cross posting is strongly encouraged in the instance. If you feel your post or another person's post makes sense in another community cross post into it.

Hope you enjoy the instance!

Rules

Rules

  • Follow the programming.dev instance rules
  • Keep content related to programming in some way
  • If you're posting long videos try to add in some form of tldr for those who don't want to watch videos

Wormhole

Follow the wormhole through a path of communities [email protected]

founded 1 year ago
MODERATORS
snowe
Ategon
[email protected]
71
Unison | A friendly, statically-typed, functional programming language from the future · Unison programming language (www.unison-lang.org)
submitted 9 months ago by starman to c/programming
44 comments fedilink hide all child comments
 

A friendly programming language from the future.

you are viewing a single comment's thread
view the rest of the comments
[–] [email protected] 7 points 9 months ago* (last edited 9 months ago) (1 children)

Although, i would agree with it not necessarily being "friendly", since its a drastically different syntax than many beginners would be used to, the brackets and parenthesis here are not what you think they are.

Unison is a language in the style of Haskell, F#, Purescript, Elm, etc. So that first line is actually type annotations.

In Haskell, this would just be helloWorld :: IO () , meaning a function named "helloWorld" with no arguments and produces what is essentally a potentially-unsafe IO action with a Void return (the empty parenthesis () ).

Here in Unison they call the bracket part "abilities" or something. Its saying the same thing as Haskell, but being more explicit in saying it can raise an exception.

[–] [email protected] -4 points 9 months ago* (last edited 9 months ago) (1 children)

Yeah sorry - that's just unnecessarily obtuse. Programming languages just don't need to be that convoluted. Hello world should look something like this:

print("Hello, World!")

And when you need more complexity, it can still be far simpler than Unison (or Haskel). For example this (in Swift):

func processNumbers(_ numbers: [Int]) -> [Int] {
    return numbers.filter { $0 % 2 == 0 }.map { $0 * $0 }
}

let numbers = [1, 2, 3, 4, 5, 6]
let processedNumbers = processNumbers(numbers)
print(processedNumbers)
[–] [email protected] 2 points 9 months ago

Hello world should look something like this: print("Hello, World"!)

You don't need the annotation line in Haskell-esque languages, most of the time. Without the annotation, this is Hello World in Haskell:

main = print "Hello, World!"

And when you need more complexity, it can still be far simpler than Unison (or Haskell)

import qualified Data.List as List
import Data.Function ((&))

processNumbers numbers =
    let
        isEven n = mod n 2 == 0
    in
    numbers
        & List.filter isEven
        & List.map (^2)

main =
    processNumbers [1, 2, 3, 4, 5, 6]
        & print