2-3 May 2017, Oslo Norway
flatMap(Oslo) a functional programming conference with focus on Scala and the Java Virtual Machine
General Admission sold out!
A tiny Last Minute batch will be available April 1st

Recursion Schemes and Fixed Point Data Types


Its always challenge to build a good abstraction during work on library. Library codebase must be flexible and modular when user code must be clean and easy understandable. One of variants to build API between library and customer its Free evaluation approach. In that case you as developer is free to interpret customer actions as you want and customer is free to define actions as he want. In my talk I will show how to build API based on recursive abstract data types, describe why its cool and demonstrate some tricks on type system to make customer experience with library better.

Arthur Kushka

Arthur Kushka


A passionate developer that write freaky stuff on Scala for last three years. In love with pure functions and their composition. Working on streaming data processing and event sourced, CQRS services in AutoScout24.