C#

Hello Postgres folks! We’re happy to announce our next in-person PostgreSQL meetup, which will take place at ULB in **Brussels** 🇧🇪 📅 **When:** Tuesday, **10 March 2026** 📍 **Where:** Université libre de Bruxelles (ULB), Brussels Solbosch campus, same location as FOSDEM, just make sure to find the right building and room 📌 **Room:** S.UA6.124/128 Building U, door A, level 6, room 124 Campus map: https://www.ulb.be/en/solbosch/campus-map Address: Avenue Paul Héger 22, 1050 Brussels This meetup will follow our usual after-work format, with talks, discussions, and plenty of time to catch up with fellow PostgreSQL enthusiasts over food and drinks. **Program** * **18:00** Doors open * **18:20** Welcome by PostgreSQL Users Group Belgium * **18:30** "*MobilityDB: Bringing Mobility Data Inside PostgreSQL*" by Esteban Zimanyi (ULB) * **19:00** "*Scaling Semantic Models: Bespoke PostgreSQL Schemas at SaaS Scale*" by Thijs Lemmens * **19:30** "*Percona Operator for PostgreSQL: An Honest Overview*" by Yoann La Cancellera (Percona) * **20:00** Food & Drinks 🍕 Sponsored by Percona * **21:00** Close A big thanks to **Mahmoud Sakr (ULB)** for hosting and to **Percona** for sponsoring the event 🙏 **More details about the talks:** * **MobilityDB: Bringing Mobility Data Inside PostgreSQL** *MobilityDB is an open source data management and analytics platform for mobility data (https://github.com/MobilityDB/MobilityDB). Its core function is to efficiently store and query mobility tracks such as vehicle GPS trajectories. Built on top of PostgreSQL and PostGIS, it provides spatiotemporal data management via SQL.* *Because it is implemented as a native PostgreSQL extension, MobilityDB can be deployed in traditional on premise setups as well as cloud and edge environments without requiring a separate data platform.* * **Scaling Semantic Models: Bespoke PostgreSQL Schemas at SaaS Scale** *While most CMS platforms rely on generic EAV tables, ContentGrid generates native PostgreSQL schemas directly from user-defined semantic models. We’ll discuss the challenges of automating DDL migrations for thousands of unique schemas and the infrastructure patterns we use to keep this model-driven approach performant, isolated, and manageable at scale.* * **Percona Operator for PostgreSQL: An Honest Overview** *In this talk, we review the Percona Operator for PostgreSQL, how it derives from its Crunchy foundation, how it is architected, and the capabilities it provides. We will examine its strengths and weaknesses, how it approaches vendor lock in, and the strategy shaping the project.* *The goal is not to present a feature list or a how to guide, but to focus on architectural considerations and operational tradeoffs.* We’re looking forward to another great evening of PostgreSQL, community, and good conversations in Brussels. See you there! 🐘💛🖤❤️

📌 Let's meet in **Brussels** on **March 10th, 2026** for an interactive conference and an enriching networking session! Come and discover Odoo, the all-in-one integrated software that will simplify your day-to-day business. Say goodbye to double coding, lost invoices and budgets; create your website in a few clicks... Odoo offers you a wide range of tools built for IT.🧐 🔎 **AGENDA** 🔍 19h00: Welcome 19h15: Conference - Interactive demo & tips to digitize your company. 21h00: Networking - Snacks and drinks. ➡️ Are you convinced? You can subscribe at the following link: [https://www.odoo.com/r/kl96](https://www.odoo.com/r/kl96) The event is free, but registration is mandatory.❗ **Important:** 📍 Where? Kinepolis Brussel - Bd du Centenaire 20 📅 Date? March 10th, 2026 📝 Registration? [https://www.odoo.com/r/kl96](https://www.odoo.com/r/kl96) 💰 Price? FREE! Hope to see you soon!

Ben je het beu om moeilijke systemen en meerdere apps te gebruiken om je bedrijf te runnen? Vereenvoudig het volledige process dankzij Odoo, de all-in-one geïntegreerde software! 💯 Neem deel in **Brussel** op **10 Maart 2026** aan een uniek evenement, dat een live demonstratie en een vraag- en antwoordsessie combineert en afgesloten wordt met een relaxte netwerksessie.📍 Registreer voor ons gratis event om een ticket te bemachtigen. 📋 📋 Link: [https://www.odoo.com/r/2ZF](https://www.odoo.com/r/2ZF)

🇬🇧 EN 🇬🇧 🔥 SALSA CUBANA CLASSES ARE BACK 🔥 We are delighted to see you again for the start of the 2025/26 academic year 👉 Find all the needed information on our website : **[https://danzamania.be/](https://danzamania.be/horaires/?fbclid=IwZXh0bgNhZW0CMTAAYnJpZBExUjNGU3gzRWdsUFlWMGJMQgEeCHgiKV40mum5hOp5szt0Lxx3U-5DyHO_wR_ZJekcr_m7EFRdpcRthKRV9EU_aem_W6hFXCri8O6Kd9el-RIuIQ)** ✅ PROGRAMME ✅ 👉 TUESDAY 16/09 7:00-8:00 pm - Salsa Level 1A @ Salle Oxygène - Angie, Octavia & Raffa 8:15-9:15 pm - Salsa Niveau 1B\* @ Salle Ste Suzanne - Tine & Sam 8:00-9:00 pm - Salsa Cubana Level 2 @ Salle Oxygène - Angie, Octavia & Raffa \*The Level 1B course is the same as the Level 1A course. It will be taught by Tine & Samuel and starts at 8.15 p.m. It allows those who wish to arrive one hour later and have a group of about 10 people. 👉 WEDNESDAY 17/09 7:00-7:30 pm - Body Expression @ Salle Oxygène - Yusnay, Tine & Raffa 7:30-8:30 pm - Salsa Level 3 @ Salle Oxygène - Yusnay, Tine & Raffa 8:30-9:30 pm - Salsa Level 4 @ Salle Oxygène - Yusnay, Tine & Raffa 👉 THURSDAY 18/09 8:00-9:00 pm - Cuban Salsa Partnerwork - Level 1 + @ Studio Empain - Zoli 9:00-10:00 pm - Cuban Salsa Partnerwork - Level 2 + @ Studio Empain - Zoli 👉 FRIDAY 19/09 8:30-9:30 pm - Rueda de Casino @ Vibrato - Team Danza Mania 9:30-12:30 am - Practica & Entertainment with DJ Joel 💃 Dale Mambo🕺

En avez-vous assez de devoir utiliser de nombreuses applications différentes pour gérer votre entreprise? Simplifiez tout ça avec Odoo, l’unique plateforme dont vous avez besoin pour tout gérer! 💯 Retrouvez-nous à **Bruxelles** le **10 Mars** **2026** à **19h** pour un événement unique, combinant une démo en direct dont vous serez le héros et une session Q&A, suivi par un cocktail networking. 📍 ➡️➡️ Inscrivez-vous à notre événement gratuit pour obtenir votre billet via notre site web: [https://www.odoo.com/r/zHi](https://www.odoo.com/r/zHi) ⬅️⬅️ La conférence se déroulera en français

Would you like to improve your language skills and networking in a casual atmosphere? This event is for you! All languages welcome! Everyone is welcome! The aim is to speak with native/fluent speakers of your target language(s). You'll be around all types of people throughout the whole event. We will be in a private area. A great atmosphere is guaranteed! You'll have to order a drink to attend the event 😀 Don't hesitate to contact us for any further information

La idea es quedar y practicar francés y español en Bruselas. Apto para todos los niveles. Groupe pour améliorer l'espagnol et français à Bruxelles. Pour tous les niveaux. Nos juntaremos en el Centro Cultural Metaprosa (Chaussée de Saint Pierre 9, 1040 Etterbeek, Bruselas) para conversar con un café o una cerveza en la mano. Todos los martes de 19.00- 21.30.

Hey Brussels Sprouts!! **Our Language Exchange Event is coming up!! 🌍** We will have five language tables: **French, Dutch, English, Spanish, and Italian.** Each table will host around **2–5 participants**, **Participants rotate every 15–30 minutes** and you are welcome to move freely between tables to practice different languages. Native speakers are especially encouraged to join and share their language and culture! **Contribution to Our Events** Starting this year, we kindly ask participants to contribute in one of the following ways: **€5** per event, or **€40** annual membership fee If you feel like supporting us beyond this, to help people who can’t afford it, you are very welcome to do so 💛 If the contribution is a concern for you, please don’t hesitate to reach out to us directly 😉 **These contributions will help us:** * Cover the annual Meetup platform fee * Encourage everyone to respect RSVPs (We experienced a high number of no-shows at several events last year, which made organization more difficult.) * We will donate 10% collected fees to support Queer oriented organisations in the end of the year. Bank details: Yifei Yang BE12363234512492 Communication: your name+ event/membership **To make sure your spot is reserved, please complete your registration once you sign up.** We will prioritize those who have completed the registration process. Thank you very much for your understanding and cooperation. **Cheers!** 🥂 Brussels Sprouts 🇧🇪🥬💚

**PLEASE READ THE ATTENDANCE POLICY (below) IF IT'S YOUR FIRST TIME** **SUNDAY COFFEE & JAPANESE CONVERSATION** 日曜日のコーヒー＆日本語会話 Our "Japanese/English Conversation Exchange" offers you a unique opportunity to immerse yourself in the world of Japanese culture and language, all while helping native Japanese members to learn their target language. 私たちの「日本語/英語会話交流」は、日本の文化と言語の世界に没頭しながら、ネイティブの日本人メンバーが英語、フランス語、またはオランダ語を学ぶのを手助けするユニークな機会を提供します。 **Date: /** 日付：**(almost) every Sunday** **Time: /** 時間：**from 4.00 pm to 6.00 pm** **Location: /** 場所：**Cafe Caberdouche - Place de la Liberté 8, 1000 Bruxelles** **Venue Note: /** 会場の注意：**The manager of the cafe kindly accepted us to book a table on a regular basis. To thank him for his kindness, please order AT LEAST ONE DRINK**. カフェのマネージャーが親切にも私たちに定期的にテーブルを予約することを承諾してくださいました。その親切に感謝の意を示すために、少なくとも1杯のドリンクを注文してください。 **Location Assistance: /** 場所の案内：**If you can't find us, ask one of the waiters. They know where we are :) You can also send us a message.** 私たちを見つけられない場合は、ウェイターの一人に尋ねてください。彼らは私たちがどこにいるか知っています :) メッセージも送っていただけます。 **Event Agenda: /** イベントのアジェンダ： * **4:00 PM - 6:00 PM: JAPANESE CONVERSATION** \- Join us for the Japanese conversation and cultural exploration\. Beginners are welcome / 日本語会話 \- 最初の30分は日本語の会話と文化探求に充てられています。初心者も聞くだけでも歓迎です。30分後に参加しても構いません。多言語交換 \- ベルギーの多様性を体験し、ネイティブの日本人メンバーが英語、フランス語、またはオランダ語を学びたいと熱心に待っています。さまざまな言語で異文化交流の会話に参加しましょう。私たちの日本の友人にベルギーの文化、伝統、生活を紹介しましょう。 * **6:00 PM: EVENT CONCLUSION** \- Please respect the event's start and end times to maximize your language exchange opportunities\. Your participation and enthusiasm are appreciated\! イベントの終了 \- イベントの開始時間と終了時間を尊重して、言語交換の機会を最大限に活用してください。参加と熱意に感謝します！ **Attendance Policy: --->** 以下の日本語 * We're excited to have you join our events and appreciate your commitment to learning and growing together. To ensure a productive and enjoyable experience for all participants, please take note of our attendance policy: 1. **Punctuality:** Please arrive on time for scheduled events. Late arrivals can disrupt the flow of the event and may miss important information. 2. **Language Commitment:** If you sign up for language-specific sessions, such as Japanese conversation or language exchange, we kindly request your commitment to actively participate in that language for the designated duration. 3. **Respect:** Treat fellow participants, organizers, and cafe staff with respect and courtesy. Harassment or disruptive behavior will not be tolerated. 4. **Removal Policy:** A participant who is not respectful towards other members will be removed from the group and blocked, with no warning. This point is not negotiable. 5. **Cancellation:** If you are unable to attend an event you've registered for, please let us know as soon as possible. This helps us plan accordingly and allows others to take your place if there's a waitlist. 6. **No-Show Policy:** Three no-shows (failing to attend without prior notice) may result in restrictions on event registration to ensure fairness to other participants. By attending our events, you agree to adhere to these guidelines. We aim to create a welcoming and inclusive environment where everyone can learn and connect. Thank you for being part of our community! **出席ポリシー：** 私たちは、イベントに参加していただけることを楽しみにしており、皆さんが一緒に学び成長することに取り組んでいただけることを感謝しています。すべての参加者が生産的で楽しい経験をするために、出席ポリシーにご留意ください： 1. 時間厳守：予定されたイベントには時間通りにお越しください。遅刻はイベントの流れを乱し、重要な情報を見逃す可能性があります。日本語のみのセッションは午後4時、全言語のセッションは午後4時30分開始です。 2. 言語へのコミットメント：日本語会話や言語交換など、特定の言語のセッションに登録された場合は、その言語での積極的な参加をお願いします。 3. 尊重：他の参加者、主催者、カフェのスタッフには敬意と礼儀をもって接してください。嫌がらせや迷惑行為は許容されません。 4. 退場ポリシー：他のメンバーに対して敬意を持たない参加者は、警告なしにグループから削除され、ブロックされます。このポイントは交渉の余地がありません。 5. キャンセル：登録したイベントに参加できない場合は、できるだけ早くお知らせください。これにより、他の人があなたの代わりを取ることができます。 6. ノーショーポリシー：事前の通知なしに3回のノーショー（欠席）がある場合は、他の参加者に公平になるようイベントの登録に制限がかかる場合があります。 私たちのイベントに参加することで、これらのガイドラインに従うことに同意するものとします。私たちはみなさんが学び、つながることができるように歓迎される包括的な環境を作り出すことを目指しています。コミュニティの一部としてご参加いただき、ありがとうございます！ **Note: Please stay tuned to our event page for updates and schedule changes. We can't wait to see you there and exchange languages, cultures, and stories!** 備考：更新やスケジュールの変更については、イベントページをご覧ください。そこで皆さんにお会いして、言語や文化、物語を交換できるのを楽しみにしています！

Chtitedev est un collectif de minorité de genre de la tech (développeuses, devOps, data eng,…) qui se réunissent mensuellement sous forme de meetup en non-mixité choisie.
Vous êtes une femme cis, une personne trans et/ou non binaire ? Vous entretenez un intérêt pro ou perso pour la programmation ?
Nous vous proposons de nous réunir afin de nous entraider pour pouvoir avancer au mieux dans ce monde qui a du mal à nous réintégrer dans ses rangs ! Au programme :
 ⏰ 18h30: Arrivée, petit tour de table et papotage ⏰ 18h45: Présentation : A-t-on encore besoin d'Agilité en 2026 ? ⏰ 19h15/30: Apéritif et papotage Alors que l’IA redéfinit radicalement nos capacités de production, la place de nos méthodologies historiques arrive à une croisée des chemins décisive. Entre des rituels devenus parfois automatiques et une accélération technologique sans précédent, quel rôle reste-t-il vraiment au pilotage humain dans la création logicielle ? Ce meetup propose de confronter nos certitudes aux réalités de 2026 : nous explorerons si l'agilité doit être enterrée ou si, débarrassée de son folklore, elle détient la clé pour ne pas se noyer dans la production de software inutile.

Join us for some friendly Badminton games- all levels welcome! IMPORTANT- in order to secure your place you’ll need to both book a spot on Meetup AND pay €8 by Friday morning. This is to make sure we can cancel courts if demand isn’t there, and make sure we’re being fair to people on the waitlist. Refunds will only be possible after Friday AM if another player is definitely able to take your spot Always worth joining our W’app group as well for faster, often better, updates! https://chat.whatsapp.com/GXq4WSg5QVqGelLpAzfbHG?mode=hq1tcli

What's up Friends! 👋 Let’s catch up over a cup of ☕️ (or whatever drink 🍵 or bite 🍪🍰🥐 inspires you in the moment). Where: Leopold PDN. This café may be a bit of a challenge to find on rainy days 🌧️☔️, but that's how adventures begin, right? 😂 Well, don't wait until you get hopelessly lost - text me here before you start cursing google maps 🗺️. The idea: Join the table once you've grabbed your order - mandatory! We'll kick-off with a light intro and move over to topics like activities, travel, music... At some point, if we are feeling it, we may also play some games. We will speak mostly English and French. Any other language is a bonus: 🌍🎭💃🎶🎷🤹🏻🤖 🎲 Games: No giant boards that end up in coffee spills please. Only light, short and fun games (generally card games like uno or exploding kittens💥🐱 will fit). I will bring a game or two myself, however feel free to bring along any of your own favorites. ⏱Timing: We start at 15:00, and you’re welcome to join at any time and for as long as you want. Joining later? Just let me know in advance in the chat so we keep a seat available for you 😊 🚦If you find yourself on the waiting list but you absolutely want to join or if you have any other question - feel free to contact me directly via the chat. 📢 Further details may be shared via the group chat or via DM 💬. Make sure to check your messages 👀 at least on the day before the event to avoid missing critical 🙄 announcements. 🐈‍⬛ The Friends Code:
👉No formalities - just chill 😎
👉Respect and positive vibes, if not 💥🥊 👉Can’t make it? Cancel so someone on the waitlist can grab your spot 🙏 👉 Don't show up if you are on the waiting list. See you folks! 😉

You can now join us for some friendly Badminton games on Wednesdays too! All levels welcome! IMPORTANT: in order to secure your place you’ll need to both book a spot on Meetup AND pay €8 by Sunday 18h00. This is to make sure we can cancel courts if demand isn’t there, and make sure we’re being fair to people on the waiting list. Refunds will only be possible after Monday AM if another player is definitely able to take your spot Always worth joining our Whatsapp group as well for faster, often better, updates: https://chat.whatsapp.com/FTipqtyIwcZLThbw8KpQtZ?mode=gi_t

Let's continue the tradition and play UNO, everybody is welcome :) If you're on the waitlist please check your messages, especially on Sunday. If people drop off last minute I tend to message people on the waitlist to see who can come. We'll be playing at the lobby of Radisson RED, Brussels. The address of the hotel is: Rue d'Idalie 35, 1050 Bruxelles My number is 0471 45 55 02. Feel free to call if you cannot solve a physics question, cannot find the place or simply need a hug. I have quickly written a set of rules on how we play. It is assumed that the reader has a basic concept of the game. *** Setup: * Each player starts with 6 or 7 cards each (depending on total number of players) * A card is shown in play in the middle of everyone, this is known as the top card. Goal: * The goal of the game for each player is to get rid of all cards in your hand Rules: * Whenever you go from two cards to one card, you have to say "UNO". * Each player takes his turn one by one, initially going in the clock-wise direction * A card may be played if it matches the same colour or same number or same type as the top card in play * The two black cards (Draw 4 and Wild) can be played regardless of the top card in play. * Interruption rule: You may interrupt the general flow of the game (clockwise or counter-clockwise) if you have the EXACT same card as the top card in play. If you manage to play the card prior to the person whose turn it's supposed to be, then the game continues on from you in the same direction it was previously. (Unless the reverse card was interrupted, then the direction changes). * Draw2 or Draw4 cards can be played in accordance to the interruption rule. The following person after the interrupt has to take the accumulated number of cards. If however, cards have already been drawn AND seen by the person who was supposed to take the cards, then only the remainder of cards has to be drawn. * Once someone has no cards remaining in his hand, play stops and we start counting points. Points: * Number cards have the face value as the number of points. i.e. number 6 is worth 6 points, number 0 is worth 0 points, number 4 is worth 4 points. * Skip, reverse and Draw2 are worth 20 points each * Wild and draw4 are worth 50 points each

**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 **Abstract** TBD **YouTube Link** TBA

On Thursday, March 12, 2026, we will meet at the TEKSystems offices at 700 N Hurstbourne Pkwy. Doors will open at 6:00 p.m., and the presentations will begin sharply at 6:30 p.m. Along with an excellent presentation, TEKsystems will provide food. Please RSVP so we know how much food to order. Afterward, we will go to Brick House Tavern for drinks and food to continue the conversation. The session will also be broadcast at https://twitch.tv/TaleLearnCode. ### Much Ado About Nullable - C# Nullable Reference Types Explained 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.

Window functions have nothing to do with the Windows operating system but provide a “window” to a result set when used in SQL queries. They are powerful, set-based methods to view data in unexpected ways. Window functions provide easy, set-based solutions to solve some common problems: * Using running totals * Performing operations in intervals * Identifying data gaps and islands * Performing aggregates without losing detail Many people are confused by window functions and do not know how to use them properly. This session will explore window functions, how they work, and how to use them. Demonstrations with several examples will solidify how window functions can simplify queries and make them more powerful.

We will show a variety of methods for building agents that run in Microsoft Foundry. This covers the different types of agents: Prompt, Multi, and Hosted, as well as the development lifecycle using evals and traces.

Bring your work or your hobby, hang out, and code with us. Follow @buckeyecocoa for more information.

Come out to Improving for our monthly iOS and Mac meetings. This Month's Presentation: **Python Tips and Tricks on iOS** **Mike Kennedy** What is Cocoaheads (http://cocoaheads.org/)? CocoaHeads is a group devoted to discussion of Apple Computer's Cocoa Framework for programming on MacOS X and iOS (including the iPhone, iPad and Apple Watch). During monthly meetings, members present on their projects and offer tutorials on various programming topics. What is BuckeyeCocoa (http://buckeyecocoa.org/)? BuckeyeCocoa is a group of Objective-C/Swift developers/enthusiasts. We host monthly Cocoaheads and near-weekly NSCoder meetings in Columbus, Ohio. The meetings are free to attend. Presentations! Presenters welcome! We are always in need of people willing to present material. Any Swift and/or Objective-C related topic is welcome. Times can be 5 minutes (i.e. lightning talks) to a maximum of 2 hours. Interested? Contact info is on the BuckeyeCocoa website. To volunteer for a presentation contact us at @BuckeyeCocoa on Twitter. Follow us on Twitter! @BuckeyeCocoa (https://twitter.com/#!/Buckeyecocoa/) For more information: http://buckeyecocoa.org/

Columbus Code & Coffee is an inclusive, informal co-working session. People of all skill levels attend, and we love it that way. Many people (optionally) bring projects to work on, and many other people (optionally) socialize the entire time. It's entirely up to you! **What to Expect at the Intro Circle** \~\~\~\~\~\~\~\~\~\~\~\~\~ Near the beginning of the event (1:30 pm), we do a standup: * Organizer announcements, updates, and logistics Round 1 - (7 secs max): * Your name * What you're working on * What you can help others with Round 2: * Community events you wanna plug. If none, that's cool too. Round 3: * Job opportunities you're hiring for OR announce that you are looking for one. If none, that's cool. After the introduction circle, everything is self-organized! Feel free to work alone, pair up, attend one of our workshops/presentations, or mingle!