TL;DR available at the bottom of the post. “A React Native App is a Real Mobile App” With React Native, you don’t build a “mobile web app”, an “HTML5 app”, or a “hybrid app”. You build a real mobile app that’s indistinguishable from an app built using Obj[...]

Giving good error messages is very important for modern compilers. The language Elm is famous for giving excellent user-friendly error messages. Parts of the F# community decided to improve the F# compiler messages as well. We want to make that a communit[...]

A couple of days ago I tried to fix a bug in the .NET/mono dependency manager “Paket“. The bug was a really strange edge case in Paket’s resolver algorithm that resulted in a false positive conflict (an overview about the algorithm can be found here). In [...]

As part of a longer process of making FSharpx better maintainable I created a new project called FSharp.Configuration. It contains type providers for the configuration of .NET projects: AppSettings (extracted from FSharpx) ResX (by Phil Trelford) Yaml (by[...]

I’m happy to annouce the new release of the FSharpx.Collections package on nuget. Most important changes: We extracted all collections into a new repositiory. We have documentation and samples (even for C#). PersistentVector<T> doesn’t require equality co[...]

Triggered by a short tweet by Tomas Petricek and a blog post by Don Syme I had a couple of conservations about null as a value, Null as a type (Nothing in Scala), the null object pattern and the Maybe monad (or Option type in F#). I decided to share my op[...]

As programmers we often want to express that a special property holds for a method, e.g. we want to say that the associativity law holds for list concatenation. In F# we could define a concat method like this: As programmers we could write a couple of uni[...]

After the official Visual Studio 2012 launch yesterday I think it’s a good idea to announce two new type providers which are based on the DGMLTypeProvider from the F# 3.0 Sample Pack. Synchronous and asynchronous state machine The first one is only a smal[...]