In my previous post on getting into higher order functions I wrote about how I've been using higher order functions instead of foreach loops. All of the functions defined in that article were immutable, and had no side effects aside from returning data. [...]

  This week's post is a guest article writtten by Dmitry Sevastianov with help from Dmitry Morozov, two members of the F# community, about FSharp.Data.SqlClient, a fascinatingly simple and elegant technique to integrate T-SQL and F# in new ways, using the[...]

F# 3.x Query Expressions are a nice piece of syntactic sugar, but they are notably difficult to compose. This article discusses the auto-quoting mechanism of query expressions and how it can be leveraged to implement not-too-clunky composition.

Suppose you need to write a script that finds n files, all called based on some pattern, say “c:\temp\my_file_x.txt”, where “x” is replaced by a range of numbers [1..30] for instance, reads the content of these files and glues them together. Suppose also [...]

.Net 4.5 introduced a handy little new method Comparer<T>.Create to aid the creation of bespoke comparers, which is great because it means that you don’t have to define a new Comparer class when it is going to be needed once. In case you’re wondering, it’[...]

Sometimes in F# it is useful to use LINQ extension methods such as .Take(n), .Skip(n) and .Count(). However, in F# some LINQ extension methods such as .Where(...) and .Select(...) require a type annotation on the lambda variable. This is one of the relati[...]

A bit more C#/.NET generics research project history. Attached is the "Ext-VOS" white paper from back in 1999. We passed this around to many Project-7 members at the time. Way back in the dark, dark days of object-oriented fundamentalism (i.e. the 1990s),[...]

The Visual Studio F# team is excited to announce a preview release of F# 3.0 as part of the Visual Studio 11 Developer Preview, announced on Tuesday at the //build/ conference. This preview is available now for all MSDN subscribers. The general release wi[...]