This is a follow up to my last post A Fistful of Dollars, where I looked at test-driven approaches to implementing a money type based on the example running through Kent Beck’s Test-Driven Development by Example book: In this run I decided as an exercise to skip formal unit testing altogether and just script the functionality for the multi-currency report that Kent is working towards over 100 pages or so of his book: Unsurprisingly It ended up being relatively quick and easy to implement. Money type Firs[...]

Just over a week ago I took the Eurostar over to Paris for NCrafts, a conference bringing together over 300 software craftsmen and craftswomen: @ncraftsConf A good balance between the software craftsmanship, the DDD, The functional. It was so good #ncrafts Cc @rhwy @dotnetstation— brunoboucard (@brunoboucard) May 23, 2015 The event was held in a crypt and featured a good number of F# sessions: . @CedricRup it's the second time I attend a #fsharp heavy conference in a crypt. What's wrong with us people? @[...]

At last week’s F# eXchange Robert Pickering gave a talk on Expression Oriented Programming with F#, with one of the slides condensing the only apps you’ll ever write down to 3: In the same week fsharpWorks conducted an F# Survey, the results of which are well worth a look. One of the questions was ‘What kind of learning material would you like to see more of?’ with a popular answer being ‘More material with short "cookbook" style information’. So lets take a look at 2 out of 3 of the only apps you’ll ever[...]

This Friday saw the first ever F# eXchange, a one-day 2 track conference dedicated to all things F#, hosted at Skills Matter in London and attracting developers from across Europe. There was a strong focus on open source projects throughout the day including MBrace (data scripting for the cloud), Fake (a DSL for build tasks), Paket (a dependency manager for .Net), the F# Power Tools and FunScript (an F# to JS compiler). In fact all the presenters used the open source project FsReveal to generate their slid[...]

I came across a topical .Net article by Dave M Bush published towards the tail end of 2014 entitled String and StringBuilder where he correctly asserts that .Net’s built-in string type are reference types and immutable. All good so far. The next assertion is that StringBuilder will be faster than simple string concatenation when adding more than 3 strings together, which is probably a pretty good guess, but lets put it to the test with 4 strings. The test can be performed easily using F# interactive (buil[...]