Deck of Cards In my last post , I used the analogy of creating a deck of cards to illustrate the relationship between discriminated unions and pattern mat...

I wrote a follow up to this post on what I think is a better way to represent a deck of cards. #fsharp

blog.samirparikh.com/2026/03/deck...

F# Weekly #13, 2026 – Deedle 4.0 is out! Welcome to F# Weekly, A roundup of F# content from this past week: News Addendum: Pattern Variations | Safe Clean Architecture Microsoft News Ten Months with Copilot Coding Agent in dotnet/runtime …

F# Weekly #13, 2026 - Deedle 4.0 is out! #fsharp sergeytihon.com/2026/03/29/f...

Discriminated Unions and Pattern Matching in F# I’m starting to kick the tires on discriminated unions and pattern matching as I continue to learn about F#. While not exactly the same thi...

New blog post on an introduction to discriminated unions and pattern matching in #fsharp

blog.samirparikh.com/2026/03/disc...

Release v1.1000.0 · CaptnCodr/Fli · GitHub What's Changed Add stream option by @flsl0 in #80 Update dependencies in #84 New Contributors @flsl0 made their first contribution in #80 Full Changelog: 1.111.11...1.1000.0

Long time no see. Fli has a new release, so we are back again! #fsharp 🦔

See what's changed in Fli v1.1000.0:
github.com/CaptnCodr/Fl...

Original post on sfba.social

Might not be a huge audience here, but I wanted to announce that. FSharp.Data.Npgsql is now part of fsprojects, thanks to @dsyme for the nudge. This should make maintenance easier.. It's a #typeprovider wrapper in #fsharp for #postgres that allows you to just point your code at a database and […]

Mea culpa: Free Monads in F# can support parallelism. We just need a different implementation!

New GitBook page comparing Program pattern variations for domain workflows — Free Monad vs Tagless Final, #FSharp & #CSharp.

Featuring @azariah.bsky.social work 🙏

👉 rdeneau.gitbook.io/safe-clean-a...

Release Notes | xUnit.net

We just shipped Core Framework v3 4.0.0-pre.33, Analyzers 2.0.0-pre.9, and VS Adapter 4.0.0-pre.3.

This prerelease build adds support for Native AOT, in addition to bug fixes.

xunit.net/releases/v3/...
xunit.net/releases/ana...
xunit.net/releases/vis...

#DotNet #CSharp #FSharp #UnitTest #TDD

[Repo Assist] feat: add GenerateAnonRecordStub code fix for FS3578 (closes #455) by github-actions[bot] · Pull Request #1510 · ionide/FsAutoComplete 🤖 This is an automated pull request from Repo Assist. Closes #455. What Adds a new GenerateAnonRecordStub code fix triggered by FS3578 ("Two anonymous record types have mismatched sets of fiel...

In FSAC repo, I'm getting great PRs closing 7 years old issue... from AI.

AI slope? It's polished PR, adding code fix and set of tests for it. I wish I was getting such "slope" from #fsharp community for all those years...

github.com/ionide/FsAut...

9 Ways to Manage Dependencies in One Architecture The Safe Clean Architecture is a full-stack F# project that combines Clean Architecture, DDD, and the SAFE stack. While documenting it, I realized it uses 9 distinct dependency management techniques—n...

Guess how many ways to manage dependencies are used in the Safe Clean Architecture?

#CleanArchitecture #FSharp #DotNet #DependencyInjection #FunctionalProgramming #SoftwareArchitecture

www.linkedin.com/pulse/9-ways...

Solution Organisation | Safe Clean Architecture

I am reading and will try to apply this very interesting #fsharp architecture: rdeneau.gitbook.io/safe-clean-a...

🚀 Serde.FS alpha.9 — Deterministic RPC for F#

No reflection. No controllers.
Just compile‑time RPC clients + routing.

Includes:

• [<RpcApi>]
• ASP.NET RPC server
• Deterministic JSON backend
• Shared → Server → Client example

github.com/serde-fs/Ser...

#fsharp #rpc #aot #serde #dotnet

The technical debt of the library has now been completely cleared and it is in excellent shape to be a long-standing part of the FsLab suite of packages for F#.

There's room for a more Pandas-direct-equivalent in the F# world, but that's for another day.

Enjoy your data frames! #fsharp

📈 Series gets a lot of love too in 4.0.1:

Series.rank/rankWith/ntile, sweepLevel, replaceValue, maskValues/maskAll, diffDate/diffDateOffset, pctChange, filterByMask, before/after/startAt/endAt/between, windowWhileFromEnd, chunkWhileFromEnd

Pandas-style ergonomics, F#-style correctness ✨ #fsharp

🎉 Deedle 4.0.1 is out! The F# data frame library just got a massive update - new packages, new operations, better stats, performance wins, and many long-standing bugs squashed. A huge amount of community-originated requests in one release. Full notes 👇

github.com/fslaborg/Dee...

#fsharp #dotnet

F# Weekly #12, 2026 – 11 years of Ionide 🥰 Welcome to F# Weekly, A roundup of F# content from this past week: News NBomber Studio 0.6.2 | NBomber F# Meetup (Recorded at NRK edition), Wed, Mar 25, 2026, 5:30 PM | Meetup Microsoft News Our co…

⚡️ F# Weekly #12

🏷️ #devdigest #dotnet #net #microsoft #ide #vscode #visualstudio #fp #fsharp #nbomber #maui

https://devdigest.today/goto/5886

F# Weekly #12, 2026 – 11 years of Ionide 🥰 Welcome to F# Weekly, A roundup of F# content from this past week: News NBomber Studio 0.6.2 | NBomber F# Meetup (Recorded at NRK edition), Wed, Mar 25, 2026, 5:30 PM | Meetup Microsoft News Our co…

F# Weekly #12, 2026 - 11 years of Ionide 🥰 #fsharp sergeytihon.com/2026/03/22/f...

Release v3.1.0 - Repo Assisted · fsprojects/SwaggerProvider feat: Add IgnoreParseErrors parameter to OpenApiClientProvider (#300) feat: Add SchemaReaderErrors property to OpenApiClientProvider (fixes #160) (#327) fix: include response body in OpenApiExcepti...

First Repo Assisted release of SwaggerProvider is out #fsharp github.com/fsprojects/S... 🎉🤖

Cooking with functions If you start coding as a kid, you can experience a lot of time where you're wrong about programming because you aren't ready to understand fundamental concepts. Especially if, like me, you learn how t...

Let functions cook: world.hey.com/ricardo.tava...

#javascript #elixir #clojure #fsharp #scala

You should use / not \ for F# paths, unless you mark the string raw with @" .....: Reviewed files for backslash path issues You're absolutely right—I violated F# path conventions. Let me fix all the path strings in the files | created/modified to use forward slashes instead of backslashes:

There's so much noise around the impact of #AI I'm sometimes reluctant to share here - I know many people are just 100% no, but FWIW, it's incredibly useful for biomedical research, and coding. It has made it dramatically easier to deal with the utter mess that […]

[Original post on sfba.social]

Learning to Read the F# Documentation I’ve come across a lot of good resources in the form of books and blog posts in my journey to learn F# but one resource I’m spending more ti...

"Much like reading code is an acquired skill, so too is learning to read documentation." My take on trying to navigate the #fsharp documentation.

blog.samirparikh.com/2026/03/lear...

Next week I will present the new work on Fable Beam at Oslo F# Meetup 💫 #fsharp #fablecompiler

F# Meetup (Recorded at NRK edition), Wed, Mar 25, 2026, 5:30 PM | Meetup | Bjørn Einar Bjartnes - Hello Joe - Hello Dag Brattli Come check out actors running on F# and OTP and more 25th of March with OsloFSharp at Norsk rikskringkasting (NRK) #fsharp https://lnkd.in/enf64g4h

- Hello Joe
- Hello @dbrattli.bsky.social

Come check out Dag presenting actors on F# and OTP at NRK! #fsharp
www.linkedin.com/posts/bjartn...

🚀 NBomber Studio v0.6.2 is out!

The latest update of NBomber Studio brings incremental but meaningful improvements to how teams observe and analyze load tests in real time.

nbomber.com/blog/2026/03...

#dotnet #loadtesting #performance #devtools #nbomber #csharp #fsharp

blog post hero image

From the .NET blog...

In case you missed it earlier...

RT.Assistant: A Multi-Agent Voice Bot Using .NET and OpenAI
devblogs.microsoft.com/dotnet/rt-assistant-a-re... #dotnet #NETMAUI #AI #DeveloperStories #fsharp #multiagent #openai

Releases · serde-fs/Serde.FS A compile‑time, reflection‑free serialization library for F#, including Serde.FS and Serde.FS.Json. - serde-fs/Serde.FS

Serde.FS.Json v1.0.0‑alpha.8 is out 🎉

• Full native codec
• System.Text.Json dependency removed!
• [<Serde.FS.EntryPoint>] for CLI apps
• Serde.FS.SystemTextJson backend is a WIP 🚧

github.com/serde-fs/Ser... #fsharp

blog post hero image

From the .NET blog...

RT.Assistant: A Multi-Agent Voice Bot Using .NET and OpenAI
devblogs.microsoft.com/dotnet/rt-assistant-a-re... #dotnet #NETMAUI #AI #DeveloperStories #fsharp #multiagent #openai #Prolog #voice #WebRTC

11 years ago I’ve made first commit on the project that would later be known as Ionide. A lot has changed over all those years, but one thing remains - the biggest value of the project has been meeting awesome people from F# community, many of whom I’m proud to call friends.

#fsharp

big up also for Big-O notation for free in public xml docs github.com/dotnet/core/... #fsharp dotnet 11 preview 😍

Discovering a cornerstone of Safe Clean Architecture: Domain Workflows (repost)
📸 Here is a screenshot of the article on LinkedIn, for those who prefer not to use that platform
#fsharp #dotnet

Using F# Sequences to Count Instances of the 13th of the Month Shortly after publishing yesterday’s post on the lazy evaluation of F# sequences , I came across this post by Dr. Drang about calculating t...

Inspired by a post by Dr. Drang, I try to recreate his Python script to find the frequency of the 13th day of the month using #fsharp

blog.samirparikh.com/2026/03/usin...