This page contains links to the slides and code from my talk “Thirteen ways of looking at a turtle”.

Here’s the blurb for the talk:

In this fast-paced talk, I’ll start with the well known API for turtle graphics, and then stretch it to the breaking point by creating 13 different implementations, each demonstrating a different functional programming technique.

Along the way, we’ll use partial application, functional dependency injection, validation with Success/Failure results, the Either monad, the State monad, agents with message queues, event sourcing, stream processing, capability-based design, and the interpreter pattern (aka free monad). Phew!

This talk is based on my blog posts on this topic:

Videos

Video from NDC London, Jan 18, 2017. Apologies for the orange color cast!

NDC London, Jan 18, 2017

Slides

Slides from NDC London, Jan 18, 2017

Thirteen ways of looking at a turtle from my slides on Slideshare

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