This could be the next null value mistake!

I thought it was just me really disliking the code generated by Claude. Also, a realization that when coding I often reflect on existing code and always find ways to improve that code, something any AI seems entirely incapable of.

I told claude code to NEVER EVER touch my #fsharp code base files, i.e. anything *.fs, but instead do all implementations in script files, so I can first check what is going on. And I am so glad I did this.

Hello @ursenzler.bsky.social. The troubles are that the way you can customize Rider is very confusing. For example, disabling code completion using AI. Trying to find that is really difficult. And a lot of these "useful" functions seem to be turned on by default an difficult to turn off.

Hello @auduchinok.bsky.social . The problems I have are related to use of code completion and intellisense. In general Rider works fine, but somehow, there are a lot of "magical" things happening that really get into the way. There are just too many settings to get a grip on that.

And again when using Rider with #fsharp, I run into serious usability problems. Right now the only reliable alternative (on non Windows systems) is VSCode. I really hope VSCode, i.e. the Ionide extension keeps working, otherwise I am in trouble.

One thing is sure, when coding #fsharp, Copilot can destroy more code than I care for. So, no more Copilot writing code for me, it's easy enough to write my own #fsharp code. Just using Copilot to write comments, tests or checking coding logic.

My addition for the #fsharpadvent: informedica.nl?p=437. A short blog demonstrating the powers of #fsharp fsi in real life production coding. Thanks @sergeytihon.com !

Eh, yes!! It allows me to write #fsharp everywhere I want.

Thanks to @jovaneyck.bsky.social, Claude desktop directly using the #fsharp fsi:

To any one doing #fsharp, try it out, it is awesome.

I tried it and works great!!

AOC2025/Day1/Domain.fsx at master · halcwb/AOC2025 Advent of Code 2025. Contribute to halcwb/AOC2025 development by creating an account on GitHub.

Solved the day1 #AdventOfCode puzzle using code completion with only #fsharp strongly typed domain modelling

But without any explanatory prompting or comments. So, you are in complete control of the code and how to solve the problem.

github.com/halcwb/AOC20...

I am going to experiment with #AdventOfCode. I will be using #AI, but with one command: "implement". The only context I can provide is an #fsharp type domain model. Comments that describe what to do are not allowed. Just types! The only implementation provided are let bindings. Day1:

With #fsharp, the hard part is not writing the code, the hard part (as always is) is; the domain modelling and coming up with the right algorithms.

But the #fun fact is, the #fsharp code I wrote, helps reverse engineering the conceptual modelling.

code snippet showing parallel execution

And yet another example where #fsharp shines. Improving performance by parallelizing code. So simple and almost effortless:

Ported my #fsharp #GenPRES project to dotnet 10. Some minor issues with pruning warnings and fable v5 compiler. But all in all relatively painless. github.com/informedica/...

New article: Result is the most boring sum type. https://lnkd.in/g4uy2TRm | Mark Seemann New article: Result is the most boring sum type. https://lnkd.in/g4uy2TRm

Interesting #fsharp discussion. www.linkedin.com/posts/ploeh_...

GitHub - heimeshoff/Fsharp-Full-Stack-Blueprint: A pattern-driven reference architecture for building type-safe F# full-stack apps. Includes guides for frontend (Elmish + Feliz), backend (Giraffe +… |... Introducing: F# Full-Stack Blueprint - An opinionated Template for Type-Safe Web Development with Claude After building multiple F# web applications, I've distilled the patterns and best practices in...

www.linkedin.com/posts/heimes...

YouTube video by dotnet What's New in C# 14

When I see a C# video that starts with new features to avoid problems with null? And a comment that laments about the missing implementation of DUs, like in #fsharp. Then I just wonder ...
youtu.be/xy-HzFp0pbA?...

Although I love #paket with my #fsharp projects. With the evolution of nuget, and the current dotnet 10 version, is there still an advantage of using #paket over nuget? Specifically as nuget solved transient package resolution, has its own lock file and introduced package pruning?

I would like December 14th (Sunday) if available. Thanks

Compositional IT used to have some very interesting #fsharp blogs. Unfortunately, the site is down and so are those blogs. Any means to get them back or host them somewhere else?

If you are interested how even a complete non programmer can have some real success in #fsharp, count me in. #GenPRES.

GitHub - informedica/GenPRES: Enable Safe and Efficient medication prescription, preparation and administration Enable Safe and Efficient medication prescription, preparation and administration - informedica/GenPRES

#GenPRES has moved to github.com/informedica/... as a first step to enable open source collaboration. #fsharp

#GenPRES is a clinical decision support system entirely written in #fsharp and is now officially adopted by my hospital with the intention to make this an open source, universal solution.
Feel free to contact me if you want to participate (in F#😀).

Check it out: genpres.nl

Category Theory - YouTube Category theory for programmers by Bartosz Milewski. Seattle, Summer 2016. Additional material at https://bartoszmilewski.com/2014/10/28/category-theory-for-...

If you like me actually would like to understand category theory for programmers: youtube.com/playlist?lis...

YouTube video by Zoran on C# 5 Fundamental F# Features C# Will Never Have

#fsharp features #csharp will never have.

youtu.be/uqijfxvlCqI

#csharp #fsharp | Ronald S. | 37 comments Today I had to write #csharp again – and I’m still shocked at what a - please excuse - dumb language it still is. Yet I keep reading and hearing people say things like: “C# feels more and more like F...

Always fascinating to see how people react when you point out the advantages of using #fsharp over #csharp lnkd.in/p/e6HTQdDM

If you want to say: public Foo Bar(Foo f1, Foo f2). This method takes two Foo objects as input, and returns a new Foo object as output. Why wouldn't you just say function Bar has signature:
Foo -> Foo -> Foo?? With #fsharp it just looks how I think (and how it works).