I’ll be speaking at Lambda Jam next week. Here’s the synopsis: When you leave Lambda Jam and return to work, do you expect to apply what you’ve learned here to hard problems, or is there just never time or permission to venture outside of fixing “undefined is not a function" in JavaScript? Many of us do [...]

Pentago is a favorite board game of mine, which I used to play regularly with coworkers during lunch (and occasionally during not-lunch). The rules are very simple, and casual games can be played in just a few minutes, but it's deep enough to still be satisfying if you're willing to put some thought into your strategy. … Continue reading Pentago →

Pentago is a favorite board game of mine, which I used to play regularly with coworkers during lunch (and occasionally during not-lunch). The rules are very simple, and casual games can be played in just a few minutes, but it’s deep enough to still be satisfying if you’re willing to put some thought into your strategy. In 2009 I wrote a computer player for Pentago in C#, and even managed to cobble together Silverlight and Windows Phone UIs for it that aren’t terrible. The engine uses a negamax algorithm w[...]

I'm going about my business dealing with option types thinking I finally have a good handle on monad usage within F# when suddenly I receive the following error. This expression was expected to have type int but here has type 'a option My first thought is that I've neglected to use let! but looking at my code the error is in a completely unexpected place. type MaybeBuilder() = member this.Bind(m, f) = Option.bind f m member this.Return(x) = Some x let maybe = new MaybeBuilder() type So[...]

Long time no blog, because I prefer to blog about stuff that I finished. However my current fsharp / Websharper project takes some time, and because of working conditions (little time to spend) it will take even quite some more time. So let’s write something about unfinished business. I work at a contractor company, and we have the process that every employee needs to submit their time spend in a timesheet at the end of the week and month. And then the invoice process works based on this [...]