VisualFSharp VS language-ext

If you're interested, you could further raise this on F# discord server or in https://github.com/dotnet/fsharp, F# is effectively a community-managed language so if there's a particular change you'd like to see, there is a high chance you can just make it happen if you have time to see it through.

Thanks for the tips! I had thought there were still some other gotchas with AOT and F# but it looks like the list is smaller than last time I looked. https://github.com/dotnet/fsharp/issues/13398

Nullness checking

Not quite accurate with the Parallel example. Don Syme is explicit that applicative `async` should not implicitly start work in the thread pool (https://github.com/dotnet/fsharp/issues/10301#issuecomment-7...).

There's docs about how the compiler generally does optimizations here: https://github.com/dotnet/fsharp/blob/main/docs/optimizations.md

You should add your +1 to https://github.com/dotnet/fsharp/issues/8764, which would add a syntax like #r: project ... to FSI.

So when people are mad about MS and F#, one can see here that: https://github.com/dotnet/fsharp/graphs/contributors MS does a lot more for F# then people being all pessimistic in reddit.

F# AOT feature tracking

louthy/language-ext [1] is a C# library which does its darndest to build a fully functional language inside C#. I found it very interesting and used it for an experimental project (which ended up failing, not sure if my usage of language-ext was partially to blame). People told me I should have just used F#.

Anyone familiar with both that can compare them?

[1]: https://github.com/louthy/language-ext

> p.s.: I really wish that instead of LanguageExt, companies would have adopted F# instead.

Ah the standard "why don't you just use F#" line:

I have a standard response to that now...

https://github.com/louthy/language-ext/wiki/%22Why-don't-you...

And NHibernate.Linq and Dapper.Extensions.Linq… Most ORMs in the ecosystem have at least one Linq support library, even if just a third-party extension.

Also, there are fun things that support Linq syntax for non-ORM uses, too, such as System.Reactive.Linq and LanguageExt: https://github.com/louthy/language-ext/wiki/How-to-deal-with...

You probably noticed that .SetName() returns a Either. You may have come across Unit in libraries like MediatR or Language-Ext. It's a simple construct representing a type with only one possible value. We use it as a placeholder for operations that do not return a value but may return another state. In our example, .SetName() is a Command that does not return a value but may fail. Therefore, the monad Either carries two possible states: Right (without value) or Left (with an Error).

Language-Ext is my personal favourite, but it can be a bit overwhelming for beginners due to its extensive feature set

> but I just want something closer to Scala, but for .Net

That's what I'm working toward with my language-ext library [1]. Obviously more support for expression based programming would be welcome (and higher kinds), but you can do a lot with LINQ and a good integrated library surface.

[1] https://github.com/louthy/language-ext

Definitely a fan of option types, I wonder this library has anything over the C# library language-ext which also has an Option type?

Hey, I am considering adopting the Result pattern in my codebase. Wanted to get some opinions from someone who has experience with it: should I start with language-ext or FunctionalExtensions?

> [1] https://github.com/louthy/language-ext

Cool library. I've had a few of these patterns in my Sasa library for years, but you've taken it to the Haskell extreme! Probably further than most C# developers could stomach. ;-)

You might be interested in checking out the hash array mapped trie from Sasa [1]. It cleverly exploits the CLR's reified generics to unbox the trie at various levels which ends up saving quite a bit of space and indirections, so it performs almost on par with the mutable dictionary.

I had an earlier version that used an outer struct to ensure it's never null, similar to how your collections seem to work, but switched to classes to make it more idiomatic in C#.

I recently started sketching out a Haskell-like generic "Deriving" source generator, contrasted with your domain-specific piecemeal approach, ie. [Record], [Reader], etc. Did you ever try that approach?

[1] https://sourceforge.net/p/sasa/code/ci/default/tree/Sasa.Col...

[2] https://sourceforge.net/p/sasa/code/ci/57417faec5ed442224a0f...