Last week, I gave a talk on asynchronous programming in F# at QCon London. I used the one hour slot to implement a Social Rectangle Drawing App - an application that showed the importance of asynchronous workflows on both client-side and server-side.

A couple of months ago, I posted a list of my F# talks and courses for Autumn 2011. Although I tried hard to have fewer speaking engagements during the winter and spring, there are quite a few events that

The beginning of a new year may be a good time for writing one lightweight blog post - this article shows two hidden features of F# IntelliSense in Visual Studio and also talks about writing plugins using the F# open-source release.

Writing generic numeric code in .NET is difficult, because .NET generics do not support constraints specifying that a type has to support certain numeric operations. In this article, we look how to solve the problem in F#. Using static member constraints, it is possible to write simple generic calculations and using the INumeric interface, we can capture numeric operations for a type and use them when implementing complex types such as a matrix.

In this article, we look at defining custom numeric types in F#. We'll create a numeric type representing numbers in a clock artihmetic (with base 5) and we'll see how to define custom operators, numeric literals and how to support F# PowerPack matrices.