Fable

F# is very similar to python because it's based on indentation instead of curly braces. And with Fable you can transpile it to Rust (or Python even): https://github.com/fable-compiler/fable

C# will eventually have unions that will undoubtedly be incompatible too, I worry about source generators becoming ubiquitous as well. This was also my experience with F#, phenomenal language dragged down by ugly interop with an ecosystem that barely acknowledges its existence and I feel is incompatible with its ideals. Shame too because there’s some genuinely great stuff in the community like fable [1] where if you were to chuck in JSX like templating you’d have an absolute killer web tool rather than the mess blazor is. It’s ironic that I found js interop less annoying than .net interop. [1] https://github.com/fable-compiler/Fable

Stuff like this: https://github.com/fable-compiler/Fable/issues/1822 And this Flutter binding launched a year ago by one person and then never touched again: https://github.com/fable-compiler/Fable.Flutter It just seems like an incredibly ambitious project that appears to have very little equal but is mainly worked on by a handful of people but no corporate backing. I get the feeling that if you want to use it, you'll either be the only one doing what you're doing or among just a few people. I already use F# and feel this way about the core language itself.

> So I can program in F# and run it in Python? Yes. > What are the limitations? It's in alpha. > Also, is the resulting code readable? I think so, at least in this screenshot: https://user-images.githubusercontent.com/849479/104726627-3... from this PR https://github.com/fable-compiler/Fable/issues/2339 Its author gives a talk about it here, though you may need to make a (free) account: https://skillsmatter.com/skillscasts/17237-fable-python-f-sh... He elaborates on the above screenshot and shows F# and Python running on the same Jupyter kernel.

Also there are work to support PHP (https://github.com/fable-compiler/Fable/pull/2447), Rust (https://github.com/fable-compiler/Fable/pull/2523) and Lua (https://github.com/fable-compiler/Fable/pull/2509)

What's even more exciting is there is work underway to allow Fable to target Python instead: https://github.com/fable-compiler/Fable/issues/2339 These things are bizarre when you think about the tech stack they lead to, but undeniably still really useful in our unfortunate real world. I think of F# as 'the pragmatist's functional programming language', and projects like this follow that mindset.

If you use F#, Fabulous[1] for mobile apps and Fable+Elmish[2][3] for web exist. I use Giraffe's[4] view engine for server-side HTML templating. And it looks like AvaloniaUI is going to have a similar style UI in FuncUI[5], but I'm not sure how active that is. I'm not sure about any C#-focused efforts. 1: https://github.com/fsprojects/Fabulous 2: https://github.com/fable-compiler/Fable (transpiles F# to JS) 3: https://github.com/elmish/elmish 4: https://github.com/giraffe-fsharp/Giraffe 5: https://github.com/JaggerJo/Avalonia.FuncUI

I like Fable https://github.com/fable-compiler/Fable

Indeed, fable is a very neat project, but to be honest, it is not as mature as BuckleScript at this time. For example, it takes around 20~80ms to compile a single file for BuckleScript, while Fable would talk 10x more to compile. Its generated code is pretty but its performance is not very good, see this issue (https://github.com/fable-compiler/Fable/issues/646) "this can make a difference in speed of up to about six or seven times for tight loop code using tuples, records, lists, unions, etc.(compared with BuckleScript)" But Fable is a nice project, JavaScript platform is large enough to have both :-)

If you want the BuckleScript equivalent for F#, that would be Fable. https://github.com/fable-compiler/Fable/blob/master/README.m... There's a newer branch called Fable Arch which I believe is focused on promoting the Elm Architecture for structuring web apps: https://github.com/fable-compiler/fable-arch FunScript is another alternative: http://funscript.info/