This post is part of the F# Advent Calendar in English 2015. Thanks to Sergey Tihon for organizing and letting me be a part of it this year! Some short time after implementing MembershipProvider for the first time I realized that simply relying on abstractions to make your code extendable wasn't enough. To embrace and encourage change I had to also make those abstractions as small as possible. While the class makes it possible to change implementations, its 27 abstract methods all but guarantee you'[...]

I’ve been scouring the CodeMash accepted session list for talks featuring F#, and there are quite a few! A Developer’s Journey from Object Oriented to Functional Programming, by Reid Evans Async Everywhere!, by Stephen Cleary Deep Dive into Deep Learning, by Gary Short Functional Browser Automation Testing for Newbs, by Bryan Arendt Programs that Write Programs: How Compilers Work, by [...]

A couple of days ago, I stumbled across the Wonderland Clojure Katas, by @gigasquid. It's a wonderful project, with 7 independent coding exercises, inspired by Lewis Carrol's "Alice in Wonderland". I love that type of stuff, and saw that @byronsamaripa had already made a Scala port, so I figured, why not port it to F#? As it happens, I had to travel to Seattle this week; this gave me enough idle airplane time to put together a first version here. I also had a chance to chat with  @tomaspetricek and @reed[...]

Writing something in C# and then rewriting it in F#, almost nobody does that. I did.I used to write games in Silverlight. I didn't have any revenu, but I discovered that such projects are fun to do, and that you can pickup a lot of experience with all sorts of techniques, in a short time. Experience that your real day job may not provide. At some moment I quit Silverlight games. But I still appreciated the experience you can get from such projects.To learn HTML5, I started a new game i [...]

While reviewing the bugs that I've written in F# over the course of my most recent project I've found that the only recurring bug I had was passing arguments of the same type in the wrong order. Basic Example Here's a contrived and simple example of what I mean. let assignUserToCustomer userId customerId = use command = new DbCommand() command.Execute(userId, customerId) Some() assignUserToCustomer customerId userId In this case userId and customerId are both ints so the fact that I'v[...]