This article does not age well. Especially the C# stuff...
Also, using Haskell 'very little' will not give you the experience you need to write something like this. Haskell has a (very) steep learning curve and you need to recognize ways to solve problems and to see the elegance (and the warts as well by the way). That takes time and effort; maybe there are people who just get it, I am definitely not one of those people, but the work, for me, was definitely worth it.
Also, using Haskell 'very little' will not give you the experience you need to write something like this. Haskell has a (very) steep learning curve and you need to recognize ways to solve problems and to see the elegance (and the warts as well by the way). That takes time and effort; maybe there are people who just get it, I am definitely not one of those people, but the work, for me, was definitely worth it.