A few weeks ago, I came across DiffSharp, an automatic differentiation library in F#. As someone whose calculus skills have always been rather mediocre (thanks Wolfram Alpha!), but who needs to deal with gradients and the like on a regular basis because they are quite useful in machine learning and numerical methods, the project looked pretty interesting: who wouldn’t want exact and efficient calculations of derivatives? So I figured I would take a couple of hours to experiment with the library. This post [...]

Short blog this time. I am introducing Websharper at my employer’s, but while sharing, I had a few startup problems. Probably, this information is already on the internet somewhere, but as it took me a while to solve these issues, I thought I might write a blog about it. Coming from 2.5 A few months ago, I installed Websharper 2.5.128.65. If you install Websharper today, you will download version 3.0.15.92-alpha. Unfortunately this contains breaking changes for your old code if you wrote any [...]

Na maanden voorbereiding is het eindelijk zover. Ik ga een workshop over F# houden in den Haag op 17 maart aanstaande, bij Delta-N.  Deze workshop is voornamelijk bedoeld voor mensen die al enige programmeerervaring hebben. Een nieuwe programmeertaal leren is een flinke investering.  In deze workshop gaan we in hoog tempo door de basisvaardigheden heen, die je nodig hebt om met F# aan de slag te gaan. Hierbij laten we laten we de deelnemers vooral veel zelf doen, want daar leer je het [...]

Now, let me start this post by saying I love XNA/Monogame. XNA was Microsoft’s first (and currently last) attempt to have a first class managed framework for writing games. Luckily the excellent Monogame project has picked up Microsoft’s slack and … Continue reading →

In this post, we are going to test the escaped concact/split functions that we implemented last time. Along the way, it will become apparent why F# is an ideal language for writing .NET unit tests. These are the signatures of the two F# functions to be tested: val concatEscape : esc:char -> sep:string -> strings:seq<string> -> string val splitUnescape : esc:char -> sep:string -> string:string -> seq<string> Seen from C# (e.g., in Visual Studio's object browser), the signatures would look li[...]