Functional Geekery Episode 42 – Claudia Doppioslash

In this episode I talk with Claudia Doppioslash. We talk about how she first got into functional programming; her experience with Clojure, Haskell, Idris, Erlang, Elixir, LFE, and Elm; Static vs Dynamic Types; and her goal of showing Functional Reactive Programming as a good way to do game development.

Our Guest, Claudia Doppioslash

@doppioslash on Twitter
@lambda_cat on Twitter


Compose :: Conference will be taking place Thursday, Feb. 4th and Friday, Feb. 5 of 2016 in New York City. Compose is a conference for typed functional programmers, focused specifically on Haskell, OCaml, F#, SML, and related technologies. To find out more and to register, visit

LambdaDays 2016 will be taking place on the 18th and 19th of February in Kraków, Poland. The CFP and registration has opened, so make sure to visit to find out more. And make sure to use code FunkyGeekz4dWin to get 10% off registration.

:clojureD 2016 will be taking place on the 20th of February in Berlin, Germany. The CFP has opened, so make sure to visit to find out more.

ElixirDaze will be taking place March 4th in St. Augustine, Florida. ElixirDaze is a one day conference with a nearly full day of talks and a Helping Hack session to close it out. Visit to find out more.

Erlang Factory San Fransisco will be taking place on the 10th and 11th of March, with training on the 7th through the 9th of March and the 14th through the 16th of March. The Call for Talks is now open through December 15th, and the Very Early Bird registration is open as well.

LambdaConf will be taking place May 26th – 29th in Boulder, Colorado. The CFP is currently open, and keep an eye on to find out more.

If you have a conference related to functional programming, contact me, and I will be happy to announce it.


About Claudia
How Claudia got into functional programming
The Boo programming language
Experience first getting into Clojure
Liverpool Clojure Dojo
Clojure on Android
Advantage of having REPL for development workflow
Arcadia (on gitter)
Emacs+Clojure REPL on Oculus Rift
What about Lisps attracted her to them
Idris and dependent types
Haskell Programming by Chris Allen and Julie Moronuki
Julie Moronuki and Chris Allen on Episode 19
Progressive Typing
Claudia’s Dynamic Typing vs Static Typing experience
Change of mindset between Clojure vs Haskell vs Erlang
Thinking of failure upfront
Good job that Elixir has done with the learning materials
Lisp Flavoured Erlang
Structure and Interpretation of Computer Programs in LFE
Functional Reactive Programming
Gradual learning curve for ease of adoption and productivity
Goal of games being written in functional programming languages
Elise Huard’s Game Programming in Haskell
Cambridge DDD Nights
Claudia’s video on Elm’s Time Travelling Debugger

As always, a giant Thank You goes to David Belcher for the logo design.

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