I spent the last couple of nights putting together a simple Markdown to PDF formatter using Tomas Petricek’s FSharp.Formatting project and the PdfSharp-MigraDoc library. To use this library, you can either grab the source from the GitHub repository or get it from Nuget using the following command: F# Usage To use the library from F#, …
F# – PDF fun with Markdown and FSharp.Formatting Read More »
After a long Easter holiday filled with late night coding sessions I find myself wide awake at 2am… good job I’ve still got my pluralsight subscription and a quick look at the Algorithms and Data Structures course again at least gave me something to do to relax the mind with some back-to-school style implementation of …
This is a F# implementation of the fast algorithm to count the number of inversions in an array, outlined in the Algorithms : Design and Analysis Part 1 course on Coursera.
Here’s a simple F# implementation of the merge sort algorithm (using mutable arrays) outlined in the Algorithms : Design and Analysis Part 1 course on Coursera. So refreshing to be writing simple sorting algorithms years after university, still fun!
With the official release of .Net 4.5 and Visual Studio 2012, I suspect many .Net developers will be rushing to rewrite their data access or network layers (amongst many many other things!) to take advantage of the new async-await (see the excellent 101 examples here) language feature in C#, which means you’ll likely be working …
F# – helper functions to convert between Async<unit> and Task Read More »
In Erlang, we have the Supervisor behaviour which makes it very easy to provide the means to monitor and restart a whole network of workers and other supervisors based on some configured strategy. The MailboxProcessor (aka agents) in F# doesn’t come with the same higher-level abstractions (such as Erlang’s gen_server, gen_fsm behaviours) by default, but …
Actor model will change the way you think about computation and parallelism. Hear from the mouth of the Carl Hewitt, the creator of the actor model.
You can specify a function which can take in a numeric value with a generic unit of measure easily enough: Similarly, you can also specify a discriminated union whose clauses can be of a numeric value with a generic unit of measure, like this:
Peculiarly I couldn’t find any documented way to create a type extension for a generic array, ‘a [ ], turns out you need to use backtick marks ( ` ) around the square brackets in order to do that:
Considering a very simple finite state machine (FSM) such as a code lock which requires you to enter a 4-digit numeric code and upon which will open the lock for a brief few seconds. Such a FSM have two states: Locked and Open. Every time a key is entered it checks the sequence of digits …
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