Computer Programming

Join us in Tallinn on **July 2nd at 18:00** for our next meetup, hosted by [Entigo](https://www.entigo.com/)! This time, we will explore the ins and outs of building and managing your own PostgreSQL setup, guided by two amazing speakers. We are going to explore building/managing own PostgreSQL setup with help of two amazing speakers. [Henrietta (Hettie) Dombrovskaya](https://www.linkedin.com/in/henrietta-dombrovskaya-367b26/) **Making Access Control Management Easy: Introducing pg_acm** PostgreSQL does not have any prescribed guidelines for the use of schemas, also called namespaces. A namespace is just one of many attributes of an object, whether an object is a table, a view, a function, or any other object type available in PostgreSQL. One of the common reasons for using schemas is to simplify access control management. The idea is straightforward: all objects within one schema should have identical access privileges. As simple as it sounds, the practical implementation of this approach can quickly turn into an operational nightmare unless all participants agree to follow a set of rules that are difficult to enforce. That is, unless you use pg_acm: an access control management tool for PostgreSQL, which we are going to introduce in this talk. The only thing you need to do is to define an access management policy for your database. Once it is defined, a CREATE SCHEMA command will invoke the creation of a set of event triggers and roles. All of them, working together, will ensure your access policy enforcement. No more accidental grants to PUBLIC. No more mysterious “permission denied” errors. You are in control. [Martin Vool](https://www.linkedin.com/in/martin-vool-86436018b/) **How Hard Can a Simple Kubernetes PostgreSQL Self-Service Be?** "How hard can it be?" We thought building a simple self-service was easy: let developers order a PostgreSQL instance, its databases, and users straight from the Kubernetes API, without caring which cloud runs underneath. Using managed services like AWS RDS behind a clean Crossplane-based interface, the first prototype came together fast and then day 2 arrived. This talk is a field report on everything between "it works!" and production: Kubernetes finalizers and RDS deletion protection that trap objects in limbo, backups you can only restore into a brand-new instance, and the day a user deleted an entire namespace and took our teardown logic with it. Along the way we leaned on Kyverno policies as duct tape and an upstream PR still stuck in review. If you build self-service infrastructure on Kubernetes or just enjoy other people's operational scar tissue you'll leave with concrete patterns and a healthy respect for the word "simple." **Additionally:** * **A Word from Our Host:** A brief welcome from the team hosting us. * **Lightning Talks:** Have a topic or idea? Let the organizers know if you'd like to present! * **Hallway Track:** Enjoy a cozy and practical space for networking and conversations between presentations. **Organizational Details:** * **Check-in:** There will be a secondary RSVP at the doors (Entigo will act as the data controller). * **Parking:** Free parking is available behind the building. * **Recording:** We are planning to record the event on video and will share more details once they are finalized. Looking forward to seeing you there!

Join us for the Vibe Coders Hackathon, a one-evening sprint powered by [Bilt](https://bilt.me/) x [Kafeo](https://kafeo.io/), where builders, designers, and makers come together to turn ideas into working products. ​No corporate fluff. Just vibes, code, and shipping. ​Whether you’re a solo hacker or rolling in with a crew, you’ll have 5 focused hours to prototype something real, and show it off. ​What to expect → Kick-off & Bilt Intro → Hacking time (fuel included) → Demo presentations → Prizes for the best builds ​Open to all skill levels. Teams of 1–4. Bring your laptop, your ideas, and an appetite to ship. ​📅 Tuesday, 30 June 2026 ⏰ 3:30 PM – 9:00 PM 📍Tallinn (exact location will be shared by email with all registered teams) Register your team [here](https://luma.com/3235mulg). Download [Kafeo](https://kafeo.io/for-customers), discover indie cafés, and collect digital stamps to earn rewards.

👋 **Host** (text/call if you can't find the group) * Alisa +372 560 49 272 (call) / +972 585 77 45 37 (WA text) Love languages? 👅 Want to practice speaking? Come to our meetup! *How does it work? Simple!* 👉 Make a name tag with your name and languages that you speak/learn! 👉 Look for someone who has a language you want to practice - and strike a conversation! *Important:* * **Be comfortable to "eavesdrop"** **on a conversation** in a fascinating language you are not ready to speak yet - "I just want to listen" is a thing! ☝😎 * If someone joins you with this intention - **don't switch to English** (as you normally would, because you don't want to exclude your friend from a conversation!) - but in this setting - **keep talking!** You are giving others an opportunity to listen! 😁👂 Well, this is it... we are looking forward to seeing you on Friday! Let's discover unexpected language matches together! 🤩 📸Disclaimer: The host may take photos during the event for promotion purposes. If you do not agree with this, please inform the host directly at the beginning of the meetup, otherwise it will be understood as consent. ✅**Please RSVP** so that we could take your participation into account. Let the hosts know if you happen to be late. Invite friends and family who share your love for books and languages! *** 📲 **Keep up with all of our events!** Join our [WhatsApp chat](https://chat.whatsapp.com/LXpfN4kY6H87vN5noPOryc), ask us for an invitation to the Facebook chat or follow us on social media. 🗓️ **We have meetups happening every day** of the week! From in-depth discussions to relaxed evenings and fun-filled weekends. Explore our full event calendar[ here](https://www.meetup.com/daily-meetups/events/calendar/). Hope to see you soon! 💬 Wish to **join hosting**, have questions or something to report? Don't hesitate to get in touch with the community manager: * Dalisa Cisneros / Daily Meetups (Facebook) * meetupsdaily@gmail.com * @dailymeetups (Instagram)

Dear All, The event this week is on again this Wednesday. It will be once again in the Reval cafe which is on Müürivahe Street in the Old town. We will practice some conversation and review vocabulary on a specific topic See you there and don't forget to bring your notebook and pen! Nabil

🎮 Even though it is not an event held by us, we're thrilled by the fantastic board game nights and the vibrant gaming community of Yo Mana! With an impressive collection of **100+ board games and access to game consoles like PS5, PS4, and Nintendo Switch**, this is a gaming paradise. 💰 To support the community and help cover the rent, there's a **5€ participation fee**. It would be the easiest for you to bring it in cash. Trust us, it is a modest fee considering the hours of enjoyment and the variety of games at your disposal. 📅 **Check out their [website](www.yomana.ee)**! They have a Discord channel and many other events happening. Just scroll down on the website to see the calendar. Also also, there's a recurring [Facebook event](https://facebook.com/events/s/wednesday-board-games-yo-mana-/967419134491734/) for these Wednesdays. **💬** Because **we're not the organizers of these events**, for any specific inquiries or additional information please reach out to Yo Mana through the contacts on their website.

Hi! This time we are planning to hike on the trail where we can see 6 lakes, different landscape and enjoy our wonderful company. Meeting point: https://share.google/oNBH5scHS6DXa2Qy8 Meeting time: 12:00 All the best! Maria

Dear All, The time has come to announce our next event This time we will return to the beautiful Old.Town, the very heart of it. The well-respected cafe Kehrwieder will host us again. As the weather should be good we will once again sit outside in the backyard garden area. The cafe is highly rated and was voted best cafe in Tallinn some time sgo. You are most welcome to join us. Look forward to your participation! Nabil

**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** *July Meeting - Lightning Talks!* Lightning talks are very short presentations on a topic of your choice (must be related to .NET). Talks should be 15-20 minutes in length and include minimal slides and quick demo (no live coding please). There will be 6 slots available! First come, first serve! **YouTube Link** TBD

Most people use LLMs by feel: ask a question, read the answer, decide whether it “seems good,” and move on. That works for casual use. It does not work when you are building software, automating workflows, writing important documents, or relying on AI for anything that needs to be repeatable. In this talk, we’ll look at how to improve and evaluate the inputs and outputs of LLMs using practical measurement techniques. We’ll cover how prompt changes affect results, how to compare outputs, how to build simple evaluation sets, and how math-based methods like similarity scoring can help you move beyond guesswork. This will be beginner-friendly, so even if you don't know anything about AI, you should get something out of it. However, this will be a little more technical than our intro talks. You do not need to be an AI researcher, but programmers and technically curious attendees will get a lot out of it. We’ll cover: * Why “it looks good” is not enough * How to improve prompts by changing the input, context, and constraints * How to compare LLM outputs more systematically * Basic evaluation techniques for accuracy, consistency, and usefulness * How embeddings, cosine similarity, and scoring can help evaluate results * Where automated evaluation works — and where humans still need to stay in the loop By the end, you’ll have a practical mental model for treating LLMs less like magic and more like systems you can test, measure, and improve. LOGISTICS AND PARKING: The talk starts at 7:00 PM. The first half hour is reserved for everyone to get set up and mingle. Free pizza and drinks! The cheapest parking option is to find street parking, which will only cost you a few bucks. Otherwise, park in the nearby veteran's museum lot for $8. It's highly recommended you avoid the nearby $15 garage parking.

We have moved to guild.host. Look us up there. https://guild.host/events/buckeye-cocoaheads-rcavwd

**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

We connect you with up to 30 Men or Women tennis partners close to your PLAYING REGION and skill level. This program is less competitive, no champions crowned, no league standings just dedicated tennis partners who want to meet up with you on the courts. Players will meet up to play a tennis match or just to hit around. Just go through the [Join Page](https://www.tenniscolumbus.com/partner-program) to enter this program. [https://www.tenniscolumbus.com/partner-program](https://www.tenniscolumbus.com/partner-program)

Whether you've never done improv before, or you've done it for so long you were quoted in *Truth in Comedy*, or anywhere in between, come join us! Swing by *Gresso's* for the **Columbus Improv Comedy Meetup**! The idea behind improvised comedy is to create entire scenes from scratch. A suggestion is taken from the audience and laughter is built on the spot. This can be done in game form, like *Whose Line Is It Anyway, Make Some Noise,* or *Wild 'n Out*; it can also be done in a longer way, to tell a complicated story, like *TJ & Dave*. Our meetup, which is central Ohio's longest running (and FREE!) weekly comedy event, brings the games for you to play in a safe, supportive, and compassionate environment. Afterward, many members will hang out in *Gresso's* itself and get to know each other. Not only is this a lot of fun, but you get to work on thinking faster on your feet, your public speaking, plus it's an excellent way to meet new people and build relationships that will last a lifetime, and you do that while laughing your butt off! Ask yourself if you want to join the **Columbus Improv Comedy Meetup**, and say "*Yes, And*" that you'll have a blast!

**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