Build Stuff'16 Lithuania

Since it's introduction to the world at WWDC 2013 - Swift has rocketed in popularity - becoming the most popular language on Github in 2015. Both the language and the roadmap have now been open-sourced - and no longer limited to Apple's platforms - meaning it's now available on everything from Raspberry Pi's to the server. In this session - we'll build an API using Swift, then deploy and run it on the server. We'll also cover how you'd run this in Production, the integration options which are currently available and the roadmap for Swift 3.0 - so that you're aware of what's coming in the pipeline.

Moving to a distributed system will solve all your problems and you will be in developer heaven. Right? Not exactly, having hundreds of services doing different things means it's increasingly difficult knowing where exactly production issues are hiding. In this talk Sam Elamin will relate his real life experience working on a distributed system dealing with £100,000 worth of transactions every hour. Sam will cover monitoring and how to develop your features based on how your customers use your platform and, most importantly, business metrics. Sam will cover how to implement metrics in your application and setting up dashboards to gaining visibility into what is happening in your production system right now. We'll also go through some helpful techniques to help you convince your domain experts that gaining this insight is invaluable to keeping your competitive advantage. As an extra treat come and see how JUSTEAT time travels in production, using open source software that can be set up in a matter of days!

In 1991 Erik Meijer, Maarten Fokkinga, and Ross Paterson published "Functional Programming with Bananas, Lenses, Envelopes and Barbed Wire." This paper is a classic one, widely recognizable in the FP community. Constructs described - known as recursion schemas - have real world applications. Strictly speaking, explicit recursion is the ‘goto’ of pure functional programming. Recursion schemas provide same level of sanity as loops did for structural programming back in the day.Over the years a lot of the progress have been made. Papers like "Recursion schemes from comonads" by Tarmo Uustalu, Varmo Vene & Alberto Pardo or "Unifying Structured Recursion Schemes" by Ralf Hinze, Nicolas Wu & Jeremy Gibbons - pushed the concept forward.This talk is about generalization of a very specific recursion schema (called catamorphism) over fixed point data type. After providing introduction the concept of catamorphism, we will jump straight to fix point data types trying to solve some real-world problems. Code examples are in Scala. Code examples use Matryoshka - which is an open sourced project design to generalize folds, unfolds, and traversals for fixed point data structures in Scala.