C & C++

In many organizations, APIs are treated as technical contracts — neat documentation of endpoints and payloads. But what if APIs could become something more: living expressions of the business domain itself? This talk examines how Domain-Driven Design (DDD) and modern API craftsmanship converge to establish a shared language between people and systems. We’ll walk through how techniques like Domain Storytelling, Event Storming, and Context Mapping can lead directly into OpenAPI and AsyncAPI specifications that reflect real domain intent — not just data structures. **How can LLM help?** Along the way, we’ll see how Large Language Models (LLMs) can amplify human creativity — helping teams turn visual domain artifacts into executable API contracts while preserving intent and nuance. Instead of replacing design thinking, AI becomes a collaborator in the craftsmanship process. Through practical examples, we’ll explore how bounded contexts define API boundaries, how ubiquitous language shapes resource and event models, and how contract-first design enables safe, evolutionary change. By the end, you’ll see APIs not merely as integration points, but as living domain boundaries to align architecture, business, and shared understanding. **About the speaker** [Annegret](https://www.linkedin.com/in/dr-annegret-junker-141a99a4/) is Chief Software Architect at codecentric AG in Germany. She has worked in software development for over 30 years. She worked in quite different roles and domains. She is especially interested in DDD, microservices, and everything else. She is working on a large integration project and defines APIs for partners. **The Sponsor** This time, the location, food, and drinks are sponsored by [TechTalk](https://techtalk.at/). Thank you very much, TechTalk, you rock! 🎉 This will be a joined event with the Microservices, Reactive and Distributed Systems Vienna Meetup ([https://www.meetup.com/reactive-vienna/](https://www.meetup.com/reactive-vienna/)) and it is enough to register for only one of the meetups. It is not necessary to register for both! Space is limited, so please register if you want to come. As always, we're very much looking forward to seeing you! Best regards, Daniel and Gottfried

LFU looks deceptively close to LRU: both caches evict the "least useful" item. We'll look at how the ordering rule affects data structure design. We'll discuss the algorithmic tradeoffs behind LFU and compare different implementation strategies, ending with benchmarks in C++ and Rust. Date and time: **25th of June (Thursday), 6 pm** Location: **Beograđanka, Vidikovac, 22nd floor** Address: **Masarikova 5** Online: **[C++ Serbia YouTube](https://www.youtube.com/watch?v=PwmFvXE_K9I)** To join the community discussions, we are on: * [Discord](https://discord.gg/VDUn8YtHw8) * [Telegram](https://t.me/+l7NS0GrslBMwNzI0) * [Website](https://www.cppserbia.org/) See you!

In many organizations, APIs are treated as technical contracts — neat documentation of endpoints and payloads. But what if APIs could become something more: living expressions of the business domain itself? This talk examines how Domain-Driven Design (DDD) and modern API craftsmanship converge to establish a shared language between people and systems. We’ll walk through how techniques like Domain Storytelling, Event Storming, and Context Mapping can lead directly into OpenAPI and AsyncAPI specifications that reflect real domain intent — not just data structures. **How can LLM help?** Along the way, we’ll see how Large Language Models (LLMs) can amplify human creativity — helping teams turn visual domain artifacts into executable API contracts while preserving intent and nuance. Instead of replacing design thinking, AI becomes a collaborator in the craftsmanship process. Through practical examples, we’ll explore how bounded contexts define API boundaries, how ubiquitous language shapes resource and event models, and how contract-first design enables safe, evolutionary change. By the end, you’ll see APIs not merely as integration points, but as living domain boundaries to align architecture, business, and shared understanding. **About the speaker** [Annegret](https://www.linkedin.com/in/dr-annegret-junker-141a99a4/) is Chief Software Architect at codecentric AG in Germany. She has worked in software development for over 30 years. She worked in quite different roles and domains. She is especially interested in DDD, microservices, and everything else. She is working on a large integration project and defines APIs for partners. **The Sponsor** This time, the location, food, and drinks are sponsored by [TechTalk](https://techtalk.at/). Thank you very much, TechTalk, you rock! 🎉 This will be a joined event with the Domain-Driven Design Vienna Meetup ([https://www.meetup.com/ddd-vienna/](https://www.meetup.com/ddd-vienna/)) and it is enough to register for only one of the meetups. It is not necessary to register for both! Space is limited, so please register if you want to come. As always, we're very much looking forward to seeing you! Best regards, Daniel and Gottfried

**Hey everybody!** Do you want to code together, share your projects, or just hang out in a creative atmosphere? Then join us at the **Coding Club @ Jo&Joe Hostel**! We usually start with a short introduction round so everyone can get to know each other. After that, you can: * share your achievements or pet projects (informal, just at the table) * get feedback or inspiration from others * or simply work on your own project alongside the group Bring your laptop (or any device you like to code on) if you want to actively work. Or just come by to connect and get inspired. Please try to be on time so we can kick things off together. Looking forward to seeing you there! 🚀

FlashAttention is one of the most important pieces of software infrastructure for both training and serving any relevant AI model on cutting-edge GPUs. Let's have a look under the hood. The paper comes with a blog post that may be easier to read: [https://tridao.me/blog/2024/flash3/](https://tridao.me/blog/2024/flash3/) Find the paper here: [https://arxiv.org/abs/2407.08608](https://arxiv.org/abs/2407.08608) We are trying out a new Location -- right at the Westbahnhof IKEA. Take the elevator to the fifth. We may relocate if it is too crowded. Please Text me if you are late and can't find us. \-\-\- Bring your own printout or pdf-on-a-gadget. If you didn't have the time to read the whole paper, it is sufficient to be able to pretend to have sort of skimmed it. \-\-\- Want to suggest a paper, an event location, or just stay in touch with regular members? We hang out at the following Matrix server: [https://matrix.to/#/%23pwl-wien:rend.al](https://matrix.to/#/%23pwl-wien:rend.al)

Dear Flutternauts, What an amazing time for a meetup before we go into our summer break. Use this chance and join us now, because the next meetup is quite a few days away. We also do have a few special surprises like Swag, reduced and even free Conference tickets! And this is just the start, because there are 2 amazing talks lined up again for all of you! **+++++++++++++++ LOCATION & SPONSOR ++++++++++++++++** **Sentry** helps every developer detect, understand, and fix broken code, fast. Using Sentry’s debugging platform–that favors action over dashboards–decreases resolution time from days to minutes, resulting in freed up dev cycles and happier customers. Founded in 2008 by David Cramer and Chris Jennings as an Open Source side project, Sentry is used by over 4 million developers and 200,000 organizations, including Disney, Cloudflare, GitHub, Slack, Instacart, Atlassian, and Riot Games. Learn more at [Sentry](https://sentry.io/welcome/) or follow Sentry on [Bluesky](https://bsky.app/profile/sentry.io), [GitHub](https://github.com/getsentry/), [Twitter](https://x.com/getsentry/), or [LinkedIn](https://www.linkedin.com/company/getsentry/). ***+++++++++++++++ AGENDA +++++++++++++++*** **18:30:** Introduction and welcome **19:00: Own your toolchain** **by *[Mario Chamuty](https://x.com/chamuty)*** You run pub get a hundred times a week and never think about it. But maybe ... Maybe its worth thinking about. Not because it's broken - because it could be a little faster, a little safer, and a lot more yours. A talk about improving the parts of Flutter we stopped questioning. **19:40:** 🍕 **Food, Drinks and Socializing Break** **20:10: Become a Full + Video Stack Dev - Writing UIs is just the start** **by *[Simon Auer](https://x.com/SimonEritsch)*** What if you could use your existing Flutter skills to not only build UIs on screens, but to create visual stories ... and export them as real video files like MP4? From Spotify-Wrapped like summaries, over instructional content that evolves with your codebase, to personalized videos for tens of thousands of users ... all generated programmatically. No video editor app, no ui clicking ... just beautiful code and open source (and maybe vibe coding)! <3 Batteries included: collaboration & versioning in Git, review changes via pull requests, batch-generating variations or integrating video creation directly into pipelines and CI systems **21:00: Meeting fellow Flutternauts**, last bits of food, a drink, friendly or heated discussions (about get, riverpod and bloc ;) ) in a cozy atmosphere. **21:45 - 22:00: Wrapping up**, last drinks We are looking forward to meeting you there! **\*\*WANT TO DO A TALK?\*\*** We are always looking for (short and long) talks! Just fill out this form and we will contact you: [http://talk.fluttervienna.at/](http://talk.fluttervienna.at/) **\*\*JOIN OUR DISCORD SERVER:\*\*** We have a discord server for connection. [https://discord.gg/v9Wvzg794g](https://discord.gg/v9Wvzg794g) **\*\*Flutter Vienna on TWITTER:\*\*** [https://twitter.com/FlutterVienna/](https://twitter.com/FlutterVienna/) Join us to discuss, share, contact and support each other.

Let's start our regular meetups again! All yarn crafters (knitters, crocheters, yarn spinner, yarn witches, etc.) and masters of other crafts are invited to come and join us. Let's bring our needles, hooks, yarn and work together on our latest projects while catching up and getting to know each other :) please note that the number of participants on Meetup is limited because not everyone is registering on meetup and registering via our whatsapp group. If you would like to join our group, drop me a line :) All levels are welcome! Whether your a needle ninja or a crochet padawan, you will find here a community to welcome you and help you on your crafting journey!

We've moved to guild.host Look for us there. https://guild.host/events/buckeye-cocoaheads-nscoders-tcbrk5

**Presenter:** Matthew Hess, Microsoft MVP **Time:** Pizza at 6:00, Presentation Starts at 6:30pm Eastern **Location:** Theoris, 9000 Keystone Crossing, Either Downstairs or in Suite 230 if main meeting room isn't available, Indianapolis In 2019 (C# 8.0) Microsoft introduced a feature that has generated a lot of confusion, debate and outright dissent. I'm talking about Nullable Reference Types. In this presentation, I we dig into this feature, explore why it exists, what problem it tries to solve, how it works, and how people have critiqued it, so that you as a programmer can decide if and how you want to use it. Looking forward to seeing you there!

**Important time note:** Please plan on arriving between 5:30 and 6:00 as the elevators lock after 6 and you'll need to message us and we'll need to come get you. The building address is 4450 Bridge Park The entrance is 6620 Mooney St, Suite 400 You will need to scan your ID at the door to get a visitor badge. **Abstract** *Customize the IDE: Building Extensions for Visual Studio Code* Visual Studio Code is one of the most widely used development environments today, and much of its flexibility comes from its extension ecosystem. Extensions allow developers to customize the editor with new features, integrations, and workflow improvements tailored to their needs. In this session, we’ll cover what extensions are and the different types available, including full extensions written in TypeScript or JavaScript, along with lighter-weight extensions such as color themes, language packs, language support, code snippets, and keymaps. We’ll also look at practical reasons a developer might create an extension, from automating repetitive tasks to adding custom tooling. The session includes a hands-on walkthrough of creating a new extension, testing it locally, and understanding the basic project structure. We’ll close with a brief overview of how extensions are packaged and published to the Visual Studio Marketplace and other distribution options. **YouTube Link** TBD

**Improving Office in Franklinton** Physical location: Improving Office 330 Rush Alley Suite #150 Columbus, OH 43215 Schedule: 6:00 p.m.: Socialize, eat, and drink. Improving will be providing pizza and beverages. 6:30 to 8:00 pm. Main meeting and presentation(s). Topic: This month Chris Pazsint will be talking about Agentic Coding. How does one use CLI Based Agents, and Agentic IDEs such as Cursor, Kiro, Antigravity? How to include agentic coding plugins for IDEs you already love such as Visual Studio Code. We meet on the last Monday of each Month. Presentations are given by members and friends of this group. If you would like to do a presentation (small or large) on a python topic, please contact Central OH Python at centralohpython@gmail.com

Our monthly PHP meetup. A virtual shindig courtesy of Zoom. Check back here for the details around 6:15 pm

**Latest Dojo Location!** **Knotty Pine Brewing** 1765 W 3rd Ave, Columbus, OH 43212 We're going to try a new dojo location for a few weeks and see how it works Dojos are informal Python group study sessions where everyone interested in Python gathers to learn about Python, help others with Python, or just hang out. Everyone is welcome from Python beginners to experts. Bringing a laptop is encouraged (we'll have extension cords and power strips). If there's something you want to learn leave a comment on this invite so we can plan ahead. We're looking for speakers for our Monthly Meetups! Fill out the form if you are interested in presenting to the Python Community. https://forms.gle/ehSfUAC2WgR34Crq9

**🌷 Meet Port St. Lucie Singles Tonight — Zoom Speed Dating** No apps, no awkward bios. Just live one-on-one Zoom chats with Port St. Lucie singles picked for you. **What to expect:** - Register and take a short personality quiz - Jump on Zoom when the event starts - Meet singles in guided one-on-one rounds - Get your mutual matches by email afterward **Find your bracket and grab a seat:** → **Ages 18-32** — [Register here](https://theliveround.com/product?productId=573&productType=onlineSpeedDating&city=Port%20St.%20Lucie&groupurlname=manga-k-drama-foodie-language-feast-network&ar=18-32&face_v=8.0) → **Ages 30-46** — [Register here](https://theliveround.com/product?productId=573&productType=onlineSpeedDating&city=Port%20St.%20Lucie&groupurlname=manga-k-drama-foodie-language-feast-network&ar=30-46&face_v=8.0) → **Ages 40-58** — [Register here](https://theliveround.com/product?productId=573&productType=onlineSpeedDating&city=Port%20St.%20Lucie&groupurlname=manga-k-drama-foodie-language-feast-network&ar=40-58&face_v=8.0) → **Ages 55+** — [Register here](https://theliveround.com/product?productId=573&productType=onlineSpeedDating&city=Port%20St.%20Lucie&groupurlname=manga-k-drama-foodie-language-feast-network&ar=55+&face_v=8.0) > Heads up: an RSVP here does not hold your seat. Register through your age link and finish the quiz. Spots are capped. Register, relax, and let the night do the work. 😊