Apache Hbase

BACK TO COFFEE ROOM AGAIN! Welcome to Appsterdam. Whether you are a seasoned programmer or learning to code Apps, wouldn’t it be cool to run by your challenge with another programmer when you get stuck? Or you have questions, or simply want to be in the environment of other like-minded friends while you work on your project? Welcome to Appsterdam. Bring your laptop and get feedback, encouragement and support, no matter what level you are at. Share and contribute. Get guidance. Feel good. All levels are welcome, so don’t be shy. In the future we plan to have break-out sessions where we will have short talks on valuable topics and also conduct mini-hackathons where all of us get to participate and learn together. Maike and Daniel are super committed to have an inspired group. We start at 9:30 and end at 11:30 sharp, so some a bit closer to 9:30 to make sure you get the help you desire. Just ask and maybe we can help you with: • Android Development • iOS Development • Flutter Development • C++ • JavaScript • Python • Rust • UX/UI Design (Adobe XD, Balsamiq, Keynote, Sketch, Figma)

\*\*\* Please note that at the moment there is a bug with Private messages at meetup\*\*\* You can leave a message via the comments section. Sign up in 2 steps: Step 1 and step 2: click on going and sent John PM if it’s your first time You can sign up via whatsapp if you been to the Saturday event before Note 1: you cannot join if you don’t know 4-out or 5-out offence motion Note 2: please don’t wait until last minute with pm’s. On Saturday I work until 7pm, so I cannot always reply on Saturday. Pick up Basketball 5 on 5 This is the falicity of the Dutch National teams, so professional court and rims. Address: Apollolaan 4, Amsterdam Level: Advance Price: 6 Euro per person by Cash or Tikkie We have the Center court on the wooden floor. Shower and toilet are present. Pay before the game Normally we are with 18 people in total, but for this Saturday we have few spots open. We will make 3 teams of 7 players. We start at 19:00 sharp. Try to be there at 18:30 so you can warm up. The court is available from 19:00 . We make teams at 18:55. The game starts after 19:00. We continue until 20:30. Only sign up if you are 200% sure you are joining TRY TO SIGN UP TIMELY. YOU CANNOT JOIN IF YOUR NAME IS NOT ON THE EXCEL LIST > If its your first time you need to send John a message and if you been to Saturday pick up before, you can sign up via whatsappgroup. For more information, contact John via PM. To be able to participate you must master at least the basic fundamentals: \*You know how to pass the ball (on the chest) \*You know how to dribble without looking at the ball \*You know how to box out your man during rebound \*You know the basic defense stance and slide (Starting on your toes with your knees bent and hips low). \*You know the basic offence plays: continuous passing and simple movement, cuts and screens If you are beginner, you cannot join. Beginners can try https://sportcentrumvu.nl/sporten/balsporten/basketbal/

In this session, we will analyse The Transcendental Logic (as in the second edition) of Kant's Critique of Pure Reason. ### Book [Kant, Critique of Pure Reason](https://cpb-us-w2.wpmucdn.com/u.osu.edu/dist/5/25851/files/2017/09/kant-first-critique-cambridge-1m89prv.pdf) Translated by Paul Guyer & Allen W. Wood (Cambridge University Press, 1998; revised edition 2000) #### Section - The Transcendental Doctrine of Elements Second Part The Transcendental Logic (as in the second edition) 193 - 201 Please be on time! If you want to order a drink beforehand, please arrive 10 minutes early. See you!

Dive into the world of femininity, flow, and confidence through bachata 💃 This Lady Styling workshop is open level and beginner-friendly, perfect even if you're just starting. You will learn: ✨ elegant arm styling ✨ body movement & hips technique ✨ how to feel confident, feminine, and free in your dance Feel more confident, more expressive, more YOU on the dance floor and in everyday life 💫 📍 BB Studios, Amsterdam 📅 May 2nd | 13:00 – 15:00 💸 Price: €30 ⚡ Limited spots available, PM to reserve your spot

Join us for a thoughtful and inspiring afternoon at the **ARTIS-Groote Museum**, a unique museum that explores the connection between humans, animals, plants, and microbes. Located in the ARTIS Zoo area, the Groote Museum invites visitors to reflect on big questions about life — what connects us, how we relate to nature, and how we see ourselves in the living world. The exhibitions combine science, art, and interactive installations in a beautifully restored historic building. 📅 **Saturday, May 2** 🕑 **Meeting Time:** 14:00 **Meeting point:** Entrance of ARTIS-Groote Museum Plantage Middenlaan 41 1018 CZ Amsterdam, Netherlands Official website: [https://www.artis.nl/nl/artis-groote-museum](https://www.artis.nl/nl/artis-groote-museum) *** ### 🚆 Access **Nearest tram/metro stops:** * Artis (tram) * Waterlooplein (metro/tram) * Approx. **5–10 minutes on foot** depending on the stop * Easy access from Amsterdam Central Station by tram or metro *** **Experience details:** This is a relaxed and flexible meetup. We will **not visit the museum as a group** — everyone is free to explore the exhibitions **at their own pace**, following their own interests and reflections. The museum offers interactive and thought-provoking spaces that encourage you to observe, reflect, and engage with themes of life and interconnectedness. After the visit, those who wish can join for a **casual coffee or a walk nearby to connect and chat**. This is completely optional. *** 🎟️ **Tickets:** * **Ticket purchase is your own responsibility.** * Please purchase your ticket individually via the official website in advance. * **Museumkaart is accepted.** *** 📱 **Communication:** Further meetup details and updates will be shared after participation is confirmed. our whatsapp community [https://chat.whatsapp.com/Dazeqe7fRulIz6ui6ixF9F?mode=hq2tcla](https://chat.whatsapp.com/Dazeqe7fRulIz6ui6ixF9F?mode=hq2tcla) the group for this event https://chat.whatsapp.com/FZIHPHanAsy3aPa8ZA6bCC?mode=gi_t If you enjoy reflective experiences, science, and exploring the connection between humans and nature, you’re very welcome to join.

**Founders Running Club** (FRC) brings founders, investors, tech, creative people and startup enthusiasts together for weekly easy runs and networking. We like to be comfortable when we run and finish with coffee and conversations. Choose your pace or follow a pacer—pets, friends, family, are welcome. 🗓️ Launched in San Francisco, July 16, 2022 🌍 Now in 35+ cities 📅 Running + Networking events + Community **Join the community** [http://foundersrc.com/chats](http://foundersrc.com/chats) **Stay updated**: Instagram [http://instagram.com/foundersrc/](http://instagram.com/foundersrc/) Podcast [http://podcast.foundersrc.com/](http://podcast.foundersrc.com/) LinkedIn [http://linkedin.com/company/foundersrc/](http://linkedin.com/company/foundersrc/) Strava [http://strava.com/clubs/foundersRC](http://strava.com/clubs/foundersRC) Website [http://foundersrc.com/](http://foundersrc.com/)

\*\*\* Please note that at the moment there is a bug with Private messages at meetup\*\*\* You can leave a message via the comments section. Sign up in 2 steps: Step 1 and step 2: click on going and sent John PM if it’s your first time You can sign up via whatsapp if you been to the Sunday event before Note 1: you cannot join if you don’t know 4-out or 5-out offence motion Note 2: please don’t wait until last minute with pm’s. On Sunday I work until 7pm, so I cannot always reply on Sundays. Pick up Basketball 5 on 5 This is the falicity of the Dutch National teams, so professional court and rims. Address: Apollohal 4, Amsterdam Level: Advance Price: 6 Euro per person by Cash or Tikkie We have the Center court on the wooden floor. Shower and toilet are present. Pay before the game Normally we are with 18 people in total, but for this Sunday we have few spots open. We will make 3 teams of 7 players. We start at 19:00 sharp. Try to be there at 18:30 so you can warm up. The court is available from 19:00 . We make teams at 18:55. The game starts after 19:00. We continue until 20:30. Only sign up if you are 200% sure you are joining TRY TO SIGN UP TIMELY. YOU CANNOT JOIN IF YOUR NAME IS NOT ON THE EXCEL LIST > If its your first time you need to send John a message and if you been to Sunday pick up before, you can sign up via whatsappgroup. For more information, contact John via PM. To be able to participate you must master at least the basic fundamentals: \*You know how to pass the ball (on the chest) \*You know how to dribble without looking at the ball \*You know how to box out your man during rebound \*You know the basic defense stance and slide (Starting on your toes with your knees bent and hips low). \*You know the basic offence plays: continuous passing and simple movement, cuts and screens If you are beginner, you cannot join. Beginners can try https://sportcentrumvu.nl/sporten/balsporten/basketbal/

I update the booking as early as Thursday; 5.5 euro is charged. Pay and in Please make sure you can make it then sign up. Please do not cancel the last day.

No agenda. Just good company. With a cup of coffee or tea. And nowhere to be. A small group of strangers meet somewhere outside, somewhere quiet and unhurried, for a cup of coffee and an easy conversation. No walking required. No itinerary. Just a quiet spot to settle in, and see what happens. It might be a bench in the dunes, a terrace with a view, or somewhere you’d never have found on your own. The location is shared a day or two before, quietly, to those who’ve signed up. I’ll bring the conversation cards. You bring whatever’s in your cup. A few simple things to keep it good for everyone: Everyone’s welcome. No judgement, no performance. Stay curious. Listen with care, speak with kindness. No scrolling. Just people, fresh air, and real conversation. Small group, so it stays warm. Max 6–8 people. What to bring: something to sit on if you like a drink from home or nearby, and an open mind. Strangers arrive. Friends leave.

Training for VTAG HS3 NEVOBO players only

In this format, we discuss a quote of a well-known philosopher. A summary is provided below. Please take the time to read. The Moderator will introduce the topic, we will have an open discussion, and a final round when everyone gives their conclusions. Quote of this Session: Herbert Marcuse “The more rational, productive, technical, and total the repressive administration of society becomes, the more unimaginable the means and ways by which the administered individuals might break their servitude." Herbert Marcuse is pointing out that the more efficient and “rational” a society becomes—through technology, productivity, and organised systems—the more it can control people without them even noticing. In such a system, domination doesn’t feel like oppression; it feels like comfort, convenience, and normal life. Because everything appears to function smoothly and logically, individuals lose the ability to even imagine alternative. About the author Herbert Marcuse was a German-American philosopher and key member of the Frankfurt School who became one of the most influential critics of modern industrial society. His work argued that advanced capitalism creates subtle forms of control by shaping people’s needs, desires, and thinking, leading to conformity and loss of critical awareness. Best known for books like One-Dimensional Man, he influenced 1960s student movements and remains central to debates about freedom, consumer culture, and social change. RULES Please be on time! Make sure you take time for finding the location. If something happens, please cancel as soon as possible. There are people on the waiting list. If you repeatedly sign up and don’t show up, expect to be moved to the waitlist next time. You may disagree with others, but please do so respectfully without personal attacks. Please keep your attendance to one event per week to ensure everyone has an opportunity to attend. This is a Philosophy event and this event's PRIMARY function is NOT focused on Self Help, Psychology or Theology. Though those topics can be a point of discussion from time to time. Please take that into consideration when signing up!

Join us for an evening filled with delicious Chinese Sichuan cuisine and great company! Dinner is served according to the shared dining principle: everyone will order one dish and we will be sharing the dishes together. Check out the menu from 'Fulu': [Sichuan Cuisine in Amsterdam | Fulu Mandarijn](https://fulumandarijn.com/menu) **RSVP** I will ask you to confirm your RSVP on Wednesday April 29th. Please only sign up for this event if you are really planning to come AND when you are able to confirm your attendance. **Payment** As we are sharing the food, we split the bill equally for which I will send you a Tikkie.

Let's have a laugh and a run and play badminton together @ BadmintonClub Duinwijck! No previous experience required. We usually have a good mix of experience levels, so if you want to play casual or are looking for a challenge, we've got you! The venue has rackets available to borrow. There is a bar at the venue where we can have a drink and a chat after playing. **RSVP Required❗** Please update the RSVP if you can no longer make it, to allow others to join. Its appreciated if you pay the tikkie in advance to confirm your attendance. **PRACTICAL INFO:** **Organizer:** Esther **Where:** Badmintonplein 1, 2023 BT Haarlem **Time:** See event details **Cost:** 10 euros **How to pay**: https://tikkie.me/pay/n5us16k60phbcev52gfp **What to bring:** *Loose clothing so you can move around. - Indoor sport shoes *Some water - if you like playing with your own racket, bring it along **How do I connect?** We inspire active participation and genuine connections. The more you invest in the event, the richer your experience will be. Open up, listen attentively, and show a genuine interest in others. And be surprised that in return, you'll be met with open minds, diverse perspectives, and a supportive community eager to connect ((: **Are you a newcomer?** We're trying to create a relaxed and friendly atmosphere together. So, join us, meet new people, and don't worry if its your first time. Looking forward to seeing you all there! Esther

KubeCon just wrapped and the AWS summit will be right around the corner. What's better than an event that combines both?! Join us for a relaxed evening of good conversation, familiar faces, and a couple of sharp talks from speakers who were just on stage. Whether you're still buzzing from KubeCon or gearing up for the AWS summit, this is the perfect way to bridge the gap. **On the agenda:** We'll line up two talks (roughly 20 minutes each) from speakers spanning both events — fresh perspectives, real-world insights, and plenty to talk about over drinks afterward. **The format:** * Walk in, grab a drink, say hi * Two talks back to back (\~40 min total) * Open floor: food, drinks, and good people Food and drinks will be on us. Vegetarian options will be made available. This one is intentionally low-key: no packed agenda, no rush. Just a chill chance to connect and learn more about tech you like from real people. Looking forward to seeing you there!

Great atmosphere basketball in full-sizecourt Amsterdam Buitenveldert - Amir : +31653443742

Hello, Kotlin enthusiasts! Our next MeetUp will take place at the Xebia office in Amsterdam on 13 May. **📍 Location:** [Xebia Netherlands - Amsterdam - Wibautstraat](https://maps.app.goo.gl/bPqMFCHSgTvneVjV8) Join us on an evening filled with tasty food, refreshing drinks, and insightful Kotlin discussions. Make sure to press the RSVP button! \-\-\- **🕒 Timeline:** • 17:45 - Doors open, food and drinks 🍕 • 18:30 - Opening 💻 • 18:40 - **Making @Transactional Play Nice with Kotlin Rich Errors and Either** **-** [Tjalling Ran](https://www.linkedin.com/in/tjallingran/) • 19:30 - **Quick break 🚽** • 19:40 - **How to supercharge your knowledge base with Retrieval Augmented Generation (RAG)** - [Jamie Craane](https://www.linkedin.com/in/jcraane/) 💻 • 20:25 - Closing 💻 • 20:30 - Chats & Drinks 👥 \-\-\- Title: **Making @Transactional Play Nice with Kotlin Rich Errors and Either** @Transactional rolls back on exceptions — but what if your error is a value? Functional error handling patterns like Arrow’s Either.Left or Kotlin’s upcoming Rich Errors let you model errors as return values instead of throwing exceptions, making failure explicit and strongly typed in your function signatures. The downside: your @Transactional would commit even on an error. This talk shows how to solve that with Spring AOP, so you can adopt functional error handling in an existing Spring Boot codebase without breaking your @Transactional behavior. Bio: Tjalling Ran is a back-end developer at Maqqie, where he works on public APIs, backoffice tooling, and CLA compliance, bridging technical implementation and technical and non-technical stakeholders alike. He has a passion for writing expressive and unambiguous code by leveraging the type system and naming things well. His day-to-day stack is Kotlin with Spring, OpenAPI, and JPA. Earlier in his career he worked on code generators with Xtend, a language that felt refreshingly modern compared to Java at the time, which made Kotlin a natural fit. Title: **How to supercharge your knowledge base with Retrieval Augmented Generation (RAG)** Abstract Your notes, documents, and images contain a wealth of knowledge — but finding the right piece at the right moment can be surprisingly hard. What if you could search your personal knowledge base the same way you talk to an AI assistant? In this talk, we’ll explore how Retrieval-Augmented Generation (RAG) can supercharge your personal knowledge base. You’ll learn how vector embeddings are created, how they are stored, and how they power an end-to-end RAG retrieval workflow. Along the way, we’ll demystify what embeddings actually are and why they work so well for semantic search. But we won’t stop at text. We’ll also integrate **image embeddings** into the workflow, enabling you to query your own photos and screenshots using natural language. Finally, we’ll tackle an often overlooked challenge: **protecting sensitive information**. You’ll see practical techniques for preventing confidential data from being sent to external embedding providers. By the end of the session, you’ll understand how to build a powerful, privacy-aware RAG system that turns your personal data into an AI-searchable knowledge engine. Bio: With over 20 years of IT experience, Jamie Craane designs and develops software for a wide range of organizations, from large enterprises to startups and SaaS services. Working for Moxie-IT, Jamie focuses on the entire value chain: from architecture and technology to software development, deployment and management, and improving the performance of development teams. Adding value and providing insight for everyone involved are central to his approach. Fast, secure, and automated delivery are essential to his approach. Jamie combines innovation with proven technologies and closely follows developments in Artificial Intelligence. He doesn’t shy away from challenges and enjoys sharing his knowledge with teams and the community. \-\-\- **RSVP Now!** Don't forget to RSVP to secure your seat—spots are limited! We can't wait to see you there and discuss the future of Kotlin and software architecture.

**RSVPs open exactly one week before the date and time of a pick-up.** \***The level is mixed and often intermediate. If you are a beginner, please message me so we can check if the level is suitable. I can also direct you to other options to play.** Cost: €7.10 per person. Time: 18:30-20:00 (1.5 hours) Court: Indoor half-court Location: Het Marnix, Marnixplein 1, 1015 ZN Amsterdam Please bring your own basketball to warm-up. CANCELLATION **If you can no longer attend, please cancel your rsvp more than 24 hours before a pick-up, even if you are on the waitlist.** **If you need to cancel within 24 hours, please message me personally and I can try to find a replacement**. **You are responsible for the fee if you cancel within 24 hours of a pickup and there is no replacement.** WAITLIST If you are on the waitlist, please check your status 24 hours before a pickup to see if you have moved onto the attending list. NO SHOW If you do not cancel within 24 hours twice and do not pay the fees, you will not be allowed to attend the pickups. PAYMENT Tikkie link (posted on the event page on the day). Otherwise, by bank transfer or in cash at the event (contact me ahead of time if either of these are the case). FEEDBACK If you have any questions or feedback about the group and pickups, please don't hesitate to get in touch.

Juan Venegas, one of our data trainers, is also a writer, and we’re happy to present his third fiction book. The Infinite Walk is a novel about Darío, a young physicist who moves to Scotland for his Ph.D. Alone in a cold and unknown land, he discovers Argentine tango as a way to socialise and even find love. But tango is a hard dance to learn, and it’s just as easy to make friends as it is to make enemies. You can watch the book trailer [here](https://www.youtube.com/watch?v=lhXKHquIOEQ). Come and join us for an epic night with free pizza and drinks, and many interesting personalities from the worlds of writing, dancing, and science 🕺⚛️ 📅 **Agenda:** 18:15 - 19:00h 🍕 Walk-in + Snacks & Drinks 19:00 - 19:45h🎙️Book presentation + Interactive theatre + Dance demonstration (you’ve never seen a book presentation like this one!) 19:45 - 21:00h ☕️ Book signing and more drinks. You can get your copy there at a discounted price! 📍**Location:** Xebia Data Wibautstraat 202, Amsterdam **Sign-up instructions:** * Sign up via [meetup.com](http://meetup.com) * Let us know if you have any strict dietary restrictions (e.g. vegan)

Every 2 months, we'll visit a company or institute that will host the event and provide talks. This time, we’re visiting **Blender**. Blender is a public project hosted on [blender.org](http://blender.org) with the mission to get the world’s best 3D CG technology in the hands of artists as free/open source software. Blender is licensed as GNU GPL, owned by its contributors. Countless communities and thriving businesses are built around Blender, from entertainment to medical research. Together, content creators, add-on developers, researchers and global marketplaces form an ever-expanding ecosystem. If you want to learn more, check out: * Website [https://www.blender.org/](https://www.blender.org/) * Blog [https://code.blender.org/](https://code.blender.org/) * Recordings of presentations from past Blender conferences, such as BCON25 [https://video.blender.org/w/p/ofNr3T19QdraJNTVTB7FvG](https://video.blender.org/w/p/ofNr3T19QdraJNTVTB7FvG) Also available on YouTube. The schedule is as follows: * 16:30 Walk-in, drinks, office tours * 17:00 Seating * 17:05 Welcome talk from the host: Blender * 17:10 - 17:40 Talk #1: from Jeroen Bakker - "From main loop to pixels on the screen" * 17:45 - 18:10 Networking and drinks, office tours * 18:10 - 18:40 Talk #2: from Sybren Stuvel - "Introduction to Blender's render farm Flamenco” * 18:40 - 19:30 Networking, drinks, and food For those who visited the previous meetups, you already know what to expect: deep dives into technical subjects, snacks and drinks, and enough time to socialize. You don’t need to register in advance for the office tours, they will be organised on the spot in small groups. Due to the small size of the office the registrations are **limited to 35 people** only, so please register in advance to secure your spot. And a friendly request - please no more than 5 people from the same company. Thank you! See you there!

We're having another Rust Developer Meetup and this time we're being hosted by JetBrains in their Amsterdam office in Zuid. This meetup is open to anybody who has an interest in the Rust programming language. We are planning two great talk for you all to enjoy! 18:30 Doors open with pizza and drinks 19:00-19:30 Yorick Peterse: Developing Inko with Rust 19:30-20:00 More drinks and pizza 20:00 Nationale Dodenherdenking 20:02-20:30 Tim de Jager: Building the package manager Pixi JetBrains is providing food and beverages along with hosting the event. JetBrains is a cutting-edge software vendor specializing in the creation of intelligent development tools and have recently launched RustRover, a dedicated Rust development IDE.