While It’s Compiling: Skills Matter Interviews Scott Wlaschin

While It’s Compiling is a series of interviews with experts across a range of bleeding-edge technologies and practices, exclusive to Skills Matter. Be sure to subscribe to this blog for future interviews, or follow us on Twitter.

Find out who we’ll be interviewing next and get a chance to put your questions forward with our hashtag #whileitscompiling.


scott_square_300This week on While It’s Compiling, we talked to Scott Wlaschin. He is a consultant at FPbridge.co.uk, creator of and blogger on F# for Fun and Profit, and the author of Understanding Functional Programming. Scott will be giving a talk on Railway Oriented Programming at the Functional Programming eXchange 2014.

1. What attracted you to Functional Languages in the first place?

I like languages that have simplicity, elegance and power, and are fun to program in. Many years ago, I spent a lot of time using Smalltalk, which is one of my all time favourite languages, and until recently languages like C# and Python were my main focus. I am also a fan of static typing, so when I discovered that I could get the power of static typing in a low ceremony functional language like F# (thanks to type inference), I was thrilled.  Also, like many people, I was frustrated with the bloat of modern OO programming and all the buzzwords that you had to learn. I was working towards breaking my code into much smaller, immutable pieces anyway, but the standard OO languages did not make this easy – whereas this approach was naturally suited for FP.

2. What are you working on?

Most of my recent work has been on standard enterprise software: services, e-commerce, supply chain, etc. I am convinced that FP is not just for academics or scientists, but has a vital role to play in what I call “Boring Line Of Business Applications”. Recently I have set up a FP consulting company (fpbridge.co.uk) to focus on training in this area. I am also working on a book, “Understanding Functional Programming”, which approaches FP from a non-academic point of view.

3. Do you work in only FP languages, or does the project you are working on have some FP code and some OO/Procedure code? If so, how do they fit together?

I work in a mixture of C# and F#. They work extremely well together. Don Syme and the F# team have done a fantastic job integrating F# into the .NET and Visual Studio environment. Most businesses are reluctant to fully commit to a functional language, so the functional stuff does tend to be around the edges; testing, utilities, analytics, and so on.  However, some projects have been purely in F#, and these are attracting attention for being faster to deliver, higher quality, and lower maintenance than the equivalent C# projects.

4. What is one piece of advice you can give to new programmers?

To paraphrase Doug Englebart, programming languages are tools to augment your intellect and help you solve problems. So, you should add as many tools to your tool chest as possible! Learn a variety of different programming paradigms using the “purest” language possible; e.g. learn OO using Smalltalk, FP using Haskell, logic using Prolog, stack-based using Forth/Factor, etc. This will expand your horizons and help you appreciate the bigger picture. If you stick with only mainstream languages (C# or Java, say) you will end up with a narrow (and boring) vision of how programming languages can help you think. Also, as part of this journey, you will discover that people from 30 or 40 years ago had a lot of insight and wisdom. Don’t overlook their ideas just because they are old!

5. What would you like to ask the community?

I think the FP community is doing well right now — there is a lot of interest from newcomers and in general the community is very welcoming. However, I would ask the community to appreciate that as FP becomes more mainstream, it will also have to become less pure and academic.  We shouldn’t scare newbies off by insisting that they have to understand monads and all the other scary terminology before they can be productive. What other things could we do to lower the barriers to entry?


What can we do to make Functional Programming more accessible? Tweet us at #whileitscompiling or @skillsmatter 

Scott will be giving a talk on Railway Oriented Programming at the Functional Programming eXchange 2014.

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