Kategory VS gomacro

Yeah, it has nice funcional capabilities and libraries (like Arrow[0]).

[0]: https://arrow-kt.io

Last but not least, Scala is currently the language with one of the best effect systems in my opinion (https://zio.dev/). Kotlin for example has copied the approach with https://arrow-kt.io/ which I think is great actually. But when comparing Scala and Kotlin here, Scala wins by a large margin, it is a completely different world. It's like building a highly concurrent system in Erlang vs C.

Of course, if you don't want to learn things like union types, traits/typeclasses and effects (similar to async/await but more powerful) you will be annoyed by Scala. But once you learned them, you can never go back.

In my own code, I started to use explicit error handling. I'm currently experimenting with Result (from https://github.com/michaelbull/kotlin-result) and Raise (from https://arrow-kt.io/).

Are there any more-or-less established functional crates in Rust (similar to Kotlin’s Arrow)?

I wonder how the community sees adding Arrow besides standard Kotlin language features. Is it something that's still considered useful or just redundant and causing more confusion?

You can define a function like context(EitherEffect) suspend fun MyType.bind(path: String)like the ones in https://github.com/arrow-kt/arrow/blob/b608a054a5318fe57d7055c35bb64a5effb053b6/arrow-libs/core/arrow-core/src/commonMain/kotlin/arrow/core/computations/either.kt

If you're using Kotlin, I'd highly recommend looking into the https://arrow-kt.io library. It's quite a bit more sophisticated than the Dart FP libs, and meshes well with Kotlin. They've got a great website, but even better is their engagement on the #arrow channel on the kotlinlang.slack.com Slack.

gomacro added macros and generics several years before generics reached release.

I use https://github.com/cosmos72/gomacro when I want to quickly try some code.

Officially, it's not much scripting friendly, but there are unofficial support to make it a proper scripting option like the gomacro.

If it's a simple program I guess you could use gomacro:https://github.com/cosmos72/gomacro

Thanks to gomacro we can import no standard libraries on the notebook :P

For our use (debugging and running small scripts to update data), gomacro should work well enough, despite being an "almost complete" Go interpreter. This isn't the same as the Python REPL which uses entirely the same code to run, but it should be up to the task.

I keep meaning to play with https://github.com/cosmos72/gomacro