ACCU York

🕡 Doors open 18:30
📋 Intro and admin 18:50
🗣️ Talk by Frances Buontempo (🕖 start at 19:00)
Let's investigate various ways to remove negative numbers from collections in C++.

🕡 Doors open 18:30
📋 Intro and admin 18:50
🗣️ Talk by Sam Cooper (🕖 start at 19:00)
For years, people in and around Turkey have been used to seeing strange errors in popular software: Dropbox files failing to sync, Unity games freezing, Gradle builds crashing for no apparent reason. One security researcher even found a way to break into GitHub accounts using nothing but a Turkish email address.

The connection? A single alphabet character. In this talk, we'll take a hands-on look at some famous examples of the Turkish 'i' bug, including the years-long detective story of how locale-sensitive case conversions kept crashing the Kotlin compiler.

More importantly, we'll look at how you can avoid becoming the bug's next victim. We'll examine the faulty functions that make the bug possible, and see how to spot if your program, language, or library is affected. Then we'll check out the "Turkey Test"—a simple strategy for catching localization bugs before they reach production.

If you write code in any programming language—or if you just like learning about weird software quirks—you'll have fun following the trail of destruction left by this surprising one-letter bug. No prior knowledge required.

🍕 Food will be provided, let us know if you have dietary requirements
🔗 Finish off with Q&A, networking, and 🍻
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About the speaker: Sam Cooper
Sam Cooper is the author of Kotlin Brain Teasers and Kotlin Coroutine Confidence, both published by the Pragmatic Bookshelf in 2025. His tech writing has also featured in community publications like Kotlin Weekly, Android Weekly, and Software Testing Weekly, and has even hit the top of the Hacker News front page.

Sam spent many years crafting developer-facing APIs and high-throughput backend services in Kotlin at Anaplan, where he was a Principal Engineer and tech lead. Before that, he worked at Amazon Web Services building multiplayer games infrastructure in Java. Sam holds two Master's degrees: one in Computer Science from University College London, and one in Modern Languages from the University of Oxford.

🕡 Doors open 18:30
📋 Intro and admin 18:50
🗣️ Talk by Graham Cook (🕖 start at 19:00)
“...Or how to escape from Management and get back to proper Development!”

This is one person’s journey through 30 years of the IT industry, in an unusually wide range of roles and disciplines. It looks at how to move up, down and sideways across the landscape of what it is we do, and what was learned along the way. So if you’re interested in learning from someone else’s mistakes, come and join me!

🔗 Finish off with Q&A, networking, and 🍻
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About the speaker: Graham Cook
Graham has spent many years in the IT industry, in a wide range of roles and sectors from defence and finance, to construction and TechForGood. For the last decade or so, he has been in Software Engineering in both the PHP and JVM spaces, and is particularly interested in 'how' things are done, instead of just 'whether' things are done - though that often tends to be a tricky ask!

Currently exploring Application Security, and how to integrate secure engineering practices into the creation stream, without blocking it…