Reactive Programming

Dear members of HaskellerZ I am pleased to invite you to the following guest lecture from the creator of the Elm programming language, Evan Czaplicki. Please note that it is at the OST campus in Rapperswil. Title: **Making Web Apps can be Fun!** **How to use Functional Languages at Work.** Speaker: **Evan Czaplicki** Date & Time: 03.06.2026 17h15-19h00 Place: **OST Campus at Rapperswil \| Lecture Hall 5\.002** Abstract: Typed functional languages have had success in some surprising places. From high frequency trading at Jane Street, teaching physics and engineering at Brilliant, and plenty of businesses in between. We will go through some case studies to build an intuition for why a functional language is likely (or unlikely) to succeed in a given business scenario. From there we will dive into Elm ([https://elm-lang.org](https://elm-lang.org/)), a simple functional language that runs in browsers. If we have time, we will build a little website together. You should come away from this talk with (1) the core knowledge needed to build your own functional front-end and (2) an intuition for when it is a good business idea to do so. You do not need to know functional programming to enjoy this talk. Speaker Bio: Evan is the author of the Elm ([https://elm-lang.org](https://elm-lang.org/) <[https://elm-lang.org/](https://elm-lang.org/)\>\) and Acadia \([https://acadia.engineering](https://acadia.engineering/) <[https://acadia.engineering/](https://acadia.engineering/)\>\) programming languages\. He has been developing compilers and servers in Haskell for nearly 15 years\, and has significant expertise in using low\-level techniques to get the best possible performance out of Haskell programs\. I look forward to seeing you there! Best regards, Farhad Mehta Prof. Dr. Farhad Mehta OST – Eastern Switzerland University of Applied Sciences Department of Computer Science \| Oberseestrasse 10 \| 8640 Rapperswil \| Switzerland \| [www.ost.ch](http://www.ost.ch/)

Two very different, complementary topics for our June evening. One on the small, everyday habits that make teams actually collaborate. The other on how a platform and a cultural movement transformed IT in the public sector. Here's what's planned for the evening: 17:30 - 18:00 - Arrival and first drinks 18:00 - 18:45 - Micro Habits for better Teamwork by Dr. Denniz Dönmez 18:45 - 19:30 - From DevOps to Digital Sovereignty: How a Movement Became a Platform by Syrian Hadad 19:30 - 20:30 - Networking, Open Space & More drinks\* **Micro Habits for better Teamwork** Great teamwork is like solving a puzzle, and not like playing poker, it's not about playing against each other, but rather achieving real collaboration. Micro Habits are psychological hacks that create big results in teams. Micro Habits for Better Teamwork span seven behavioral domains, such as taking responsibility, creating psychological safety, and testing our assumptions. Each provides concrete, small, actionable behaviors that lead to major improvements in collaboration. This talk presents practical, everyday tools based on real-world experience that can be applied immediately to make teamwork easier and more effective, without lengthy coaching programs or complex team-development processes. With Micro Habits, teams unlock their full potential step by step. **Dr. Denniz Dönmez** Scientific agilist and co-creator of Micro Habits for better Teamwork. 15 years experience leading teams and consulting market leaders with a background and PhD in agile methods. **From DevOps to Digital Sovereignty: How a Movement Became a Platform** IT in the public sector is anything but simple: long-established landscapes, strict regulatory requirements, complex processes, and often more than 500 business applications that must be operated reliably. For a long time, this meant ordering individual servers, databases, DNS entries, firewall rules, and storage, then assembling everything manually. Every application was unique. Pets instead of cattle. This talk tells the story of how the DevOps idea took hold in exactly this environment — first as a cultural movement, and later as a concrete operating and architectural model. Step by step, individual infrastructure evolved into a platform, manual work into automation, and isolated solutions into standardization. The result: the Aargau Cloud Platform and a dedicated platform engineering team. In an environment shaped by legacy systems, federal structures, and long lifecycle expectations, platform thinking becomes the foundation for digital sovereignty: maintaining control, reducing dependencies, and still staying innovative — without simply handing everything over to others. **Syrian Hadad** Syrian Hadad is a CTO and long-standing technology and platform leader in the public sector. Among other achievements, he built the Aargau Cloud Platform and helped establish DevOps, cloud, and architecture topics strategically within the organization. Together with the IT organization of the Canton of Aargau, he won the 2023 Digital Economy Award (Digital Excellence) for the consistent transformation toward platforms, cloud-native technologies, and modern governance. Many thanks to our **sponsors**: * Catering Sponsor: **DevOpsDays Zürich** https://www.devopsdays.ch/ * Location Sponsor: **Digicomp** https://www.digicomp.ch/ \* contact us min. 3 days prior to the event if you prefer a vegan option.

Workshop-Details Wo: Kunsthaus Zürich Wann: 03.06.2026 Zeit: 08:30 - 11:30 Uhr In diesem Workshop tauchen wir in die historische Seele Zürichs ein. Wir beginnen im Kunsthaus, wo wir das minimalistische Licht und die beeindruckenden Innenräume des Neubaus einfangen. Anschließend widmen wir uns dem pulsierenden Rhythmus am Stadelhofen, um mit den ikonischen Stahl-Linien Calatravas zu spielen, bevor wir die lebendige Energie am Bellevue durchqueren. Unsere Route führt entlang der Limmat zum Helmhaus (einem meiner persönlichen Lieblingsorte!) und endet am Münsterplatz — dem perfekten Ort, um Licht, Schatten und zeitlose Momente im Herzen der Altstadt zu meistern. Was du lernen wirst – Fotografieren bei wenig Licht – Echte und ungestellte Augenblicke des Nachtlebens festhalten – Die Schönheit der Schwarzweiss-Strassenfotografie entdecken (natürlich kannst du auch in Farbe fotografieren!) Wir beginnen den Tag mit einem Drink in einem nahegelegenen Café — natürlich auf meine Einladung! Dies ist die perfekte Gelegenheit, sich kennenzulernen, Erwartungen auszutauschen und individuelle Wünsche für den Workshop zu besprechen. Deine Teilnahme kostet 150 CHF. Bitte melde dich direkt über meine Website an und sichere dir deinen Platz: www.katjabouwman.com/workshops Erst nach Zahlungseingang ist dein Platz gesichert! Workshop Details Where: Kunsthaus Zurich When: 03.06.2926 Time: 08:30 - 11:30 AM In this workshop, we’ll dive into the historic soul of Zurich — starting inside the Kunsthaus, where we’ll capture the minimalist light and grand interiors of the new extension. We’ll then head out to the bustling rhythm of Stadelhofen to play with Calatrava’s iconic steel lines, before moving through the vibrant energy of Bellevue. Our route follows the Limmat to the Helmhaus (one of my personal favorite spots!) and concludes at Münsterplatz, a perfect location for mastering light, shadow, and timeless moments in the heart of the old town. What you’ll Learn – Shooting in low light – Capturing candid nightlife moments with confidence – Exploring the beauty of black and white street photography (of course, you can shoot in color too!) We’ll kick off the day with a quick drink at a nearby café — my treat! This is a great chance to get to know each other, share expectations and discuss any specific wishes you might have for the workshop. Your participation costs 150 CHF. Please register directly through my website to secure your spot: www.katjabouwman.com/workshops More info on www.katjabouwman.com/workshops or visit my Instagram account katja_zuerich

Let's get together for the next TechTalkThursday to learn new things and share experiences! 17:45 Door opening 18:00 **Intro** – Thomas Hug, CEO & Founder of Nine 18:05 **The Shift From "Hack In" to "Log In": How Overprivileged Non-Human Identities Became the Modern Attack Path** – Jan Brons (Co-Founder & Cyber Security Expert at Kleeo GmbH) 18:30 **How To Navigate Complex Systems Using a Non-Software Toolkit** – Florian Sommerfeldt (Quality Expert at House of Test Switzerland) 19:00 **Zero to SELECT: Providing Databases in 10 Seconds** – Daniel Wilhelm (Senior Engineer Managed Services at Nine) 19:30 Snacks & Drinks Have we aroused your interest? Then please register! We look forward to meeting you! You can also watch this event's livestream on YouTube: https://www.youtube.com/watch?v=HgsaBKivvXk

**If you cannot see your strategy, how do you know it is clear?** Even in creative teams, strategy is discussed, refined, and documented, yet often stays abstract. Ideas live in conversations, slides, and documents, but teams walk away with different understandings. What sounds aligned in theory often falls apart in practice. We process images much faster than text, yet most organizations still rely on bullet points to communicate strategy. The challenge is no longer developing better strategies. It is making them visible so people can actually align around them. In this interactive keynote, **Michelle Geerlings**, Country Director of Switzerland at Flatland, introduces visual thinking as a practical way to cut through complexity and build shared understanding. With a background in Strategic Design from TU Delft and experience across Sweden, Japan, and Kenya, she works at the intersection of design, facilitation, and strategy. Through co-creation and visual facilitation, she helps teams turn abstract ideas into clear, shared visuals. Join us on **June 3** as she shares practical examples of how sketches and simple frameworks help teams align faster and turn ideas into action. **💡 What will you learn?** * Why visual thinking is a skill anyone can learn, and how it changes the way you think * How co-creation builds ownership and engagement across teams * What really matters in visual thinking: structure, hierarchy, metaphor, and systems thinking over aesthetics * Why working visually leads to faster alignment than traditional documents *More about Flatland* [www.flatland.nl](http://www.flatland.nl) *Connect with Michelle* [LinkedIn](https://www.linkedin.com/in/michellegeerlings/) —— **📍 Where?** [Kulturhaus Helferei](https://maps.app.goo.gl/AJuPTcLTmihXxHyn9), near the Grossmünster in Niederdorf. \> Kirchgasse 13\, 8001 Zürich (Tram-Station Helmhaus) **📅 When?** Wednesday, June 3, 7:00 PM / 19:00 Uhr **⏰ What’s the schedule?** 6:45 PM → Doors open 7:00 PM → Keynote + Q&A 7:45 PM → Networking 🔗 **Discord** Get event reminders and connect with other members on Discord: ➡️ [discord.gg/PAyRBDhKkk](https://discord.gg/PAyRBDhKkk) —— **Who’s Visual Fields?** Visual Fields is a network of designers and creatives built for people to connect, support, and share with fellow experts. We have upcoming events in Zürich, Basel, and Luzern. [Check out upcoming events](https://www.visualfields.ch/) —— **Event policies** We have zero tolerance for discrimination or harassment. Be mindful not to make assumptions about gender, sexual orientation, or identity. Always ask for consent - for physical contact and work critique - and treat everyone and the space with respect. [All policies](https://www.joyed.com/experiences/ep) **Fine print (the friendly kind)** By joining, you agree that photos or videos taken at the event may be used by Visual Fields for promotional and communication purposes. See you there! 😇

3 courts

It is not unusual to hear scholars say that modern political philosophy is but a footnote to Plato’s Republic. In this foundational work, (Plato’s) Socrates and his interlocutors embark on a daring thought experiment: to define "**Justice**" by building an ideal city, Kallipolis, from the ground up. But a just city requires **just people**, and just people are such “by design”. Plato asks two questions. What does culture pour into us from the outside — and who are we becoming because of it? And what must the soul look like on the inside — so that those who lead us protect the city rather than devour it? Using selected passages from Books II, III, and IV, we will move from ancient Athens to the present day to discuss two specific challenges: **The Problem of the Poets and the Role of Culture**: In ancient Greece poets set the standards for culture. Their stories didn't just teach values, they gave citizens heroes to become. Who are our modern poets? Are they news outlets, algorithms, influencers, and screenwriters, who decide, at scale, which lives look admirable, heroic, and which virtues are worth the effort? What kind of citizens and leaders are they actually forming — and would we accept Plato's conclusion that the city cannot afford to leave this to chance? **The Paradox of the "Noble Dog"**: The Guardian (Plato’s chosen rulers class) must be "high-spirited" ([thymos](https://en.wikipedia.org/wiki/Thumos)) to defend the city, yet "gentle" to protect its people. This is not a question of technical competence, but of character. How does a society train leaders who are powerful enough to act, but disciplined enough not to devour the state? Plato wrote the Republic two and a half thousand years ago. The questions it raises have not been answered since, and may matter more now than ever. Join us in the attempt to think through Plato’s theory! Come and think them through with us. Prior reading is useful but not required. **Preparation:** Reading The Republic is a huge enterprise, but you can prepare for this event with these links: Easy Path (articles) * 0–5 minutes: [The Britannica entry](https://www.britannica.com/topic/The-Republic) for a quick synopsis. * 5–20 minutes: Chapter‑by‑chapter [walkthrough](https://www.litcharts.com/lit/the-republic/summary) of the dialogue’s main episodes and themes Deeper Dive (videos, 45-50 minutes each) * [Books I-II](https://www.youtube.com/watch?v=nVQKbQVc2_w&list=PL8D95DEA9B7DFE825&index=4) * [Books III-IV](https://www.youtube.com/watch?v=2oxMP8_pWLw&list=PL8D95DEA9B7DFE825&index=5) * [Book V](https://www.youtube.com/watch?v=BXthvnZ8ghw&list=PL8D95DEA9B7DFE825&index=6) You can find a free PDF version of the English text [here](https://www.gutenberg.org/ebooks/1497). **For Philosophical Minds Zurich theme events in general:** At our theme events, we begin with a brief topic introduction, followed by engaging discussions in small groups. It’s all about conversation, not just listening. Also, please note, we keep the atmosphere relaxed and informal—**there’s** **no pressure to speak in front of anyone**. **Important:** When you register for the event, please commit to it and don't be a NO SHOW. Presumably, when the ancient philosophers decided to go to an event, they kept to it.
 We look forward to seeing you. **Payment:** You can pay at the venue (Twint/Revolut/Cash). Thus, if you want to register at Meetup just click attend - no more needed ;). We look forward to seeing you.

Shooting only in Auto or Program mode is a thing of the past. We will learn when it makes sense to use Manual (M), Shutter Priority (TV), or Aperture Priority (AV) modes to create artistic compositions under a wide variety of conditions. This workshop is designed for beginners as well as photographers who want to dive deeper into their camera settings, lenses, and the many features their gear has to offer. **Part 1: Getting Started (2h)** * **Full Control:** Mastering Manual (M) mode. * **The Essentials:** Understanding Aperture, Shutter Speed, and ISO, and how they shape your image. * **Semi-Auto Modes:** When and why to use AV or TV modes. * **Focus:** An insight into various autofocus options. **Part 2: Lenses & Perspective (2h)** Unlike prime lenses, telephoto lenses offer more flexibility without having to move—but they also come with specific challenges. We will explore the pros and cons of different lenses and learn which glass is best suited for which purpose. **Part 3: Practical Application (2h)** Putting theory into practice outdoors, followed by a final Q&A session. **Course Hours:** The course runs from 10:00 AM to 5:00 PM. **Registration:** Please register by **May 24, 2026**, via email at admin@michaelcalabro.com. The course requires a minimum number of participants to take place. Confirmation will be sent as soon as the minimum number is reached. **Participants:** Min. 4 / Max. 8 www.michaelcalabro.com

Dear Friends of Haskell, The schedule for ZuriHac 2026 is now online on [zurihac.info](https://zurihac.info/)! This year’s keynote speakers include Simon Peyton Jones (one of the creators of Haskell), Evan Czaplicki (the creator of the Elm programming language), and GarrickChin (developer of the “Defect Process” 2D hack n' slash game on Steam). We also have a track on Category Theory, given by Jencel Panic (author of “Category Theory Illustrated”), as well as a track on rolling your own dependent types given by Andres Löh and Andrea Vezzosi. The Beginners’ Track this year will be given by Michael Sperber (CEO of Active Group and author of “Schreib dein Program”), who will also talk about teaching programming. Our website [zurihac.info](https://zurihac.info/) contains further information on keynotes and tracks and will be updated regularly. In case you have not registered yet, please do so ASAP via the link [https://zureg.zfoh.ch/register](https://zureg.zfoh.ch/register) (also on our website). Although registration is free for participants, it allows us to plan appropriately for the event: Jane Street and IOG are providing food in the evening, and we want to minimize waste. For the uninitiated: ZuriHac 2026 will take place Saturday 6 June – Monday 8 June 2026 as a physical event at the Rapperswil-Jona campus of the OST Eastern Switzerland University of Applied Sciences. ZuriHac is the biggest Haskell community event in the world: a completely free, three-day grassroots coding festival co-organized by the Zürich Friends of Haskell and the OST Eastern Switzerland University of Applied Science. It is not your standard conference with papers and presentations, but features fantastic keynotes, hands-on tracks, hacking on many of your favourite projects, and of course lots of socializing! Organizing ZuriHac would not be possible without the support and help of: * CircuitHub * Digital Asset * IOG * Jane Street * OST * Tweag * Well-Typed In case you would like to support ZuriHac, as a company or as an individual, please get in touch with us, we would be grateful: [https://zfoh.ch/#donations](https://zfoh.ch/#donations) We hope to see you there! The Zurich Friends of Haskell

Coders Monthly is a regular gathering of programmers in Zurich interested in honing their craft. It takes place in Zuerich at Cafe Bar Pluesch (https://cafe-pluesch.ch) on the first Thursday of every month. For the members list, some pics and more, see the Coders Only (https://codersonly.org/events/coders-monthly) site. Hope to see you there! PS: Please join our Discord https://discord.gg/jWUZsKQvrz for any last minute announcements.

Hi everyone This time on a **Friday**, we'll meet at Renuo's for some deep technical conversations and also to just connect with each other again. This is the plan for the evening: * 18:00 **Trees and Houses** by *Lukas Bisch*of (30') * 18:30 Slot for **Lightning Talks** if any, time-limit (max. 3 x 5') Anyone may just jump onto the stage and present something. Spontaneaous, no registration needed, but be brief! HDMI, only. * 19:15 **Shikigamiya** by *Alessandro Rodi* (30') Snacks and drinks are on Renuo!

PyData London 2026 brings together data scientists, engineers, and researchers from around the world for three days of insightful talks, tutorials, and community connection. Hosted in one of Europe’s leading tech hubs, the event highlights the latest developments in Python, machine learning, and data science. Attendees can expect a mix of cutting-edge research, real-world applications, and opportunities to network with industry leaders. Whether you're a beginner or an expert, PyData London offers something for every level of the data science community. **THIS IS NOT A TICKET- TICKETS MUST BE PURCHASED ON CONFERENCE WEBSITE.** https://pydata.org/london2026

Wie können wir Materialien und Produkte im Kreislauf halten? Mit welchen Ansätzen können wir Ressourcen schonen, Dinge länger nutzen, Neues aus Altem schaffen – und unser heutiges Handeln verändern? Welche Chancen bieten Repair-Cafés, Upcycling-Initiativen und ganz praktisches Handeln im Alltag für eine nachhaltige Zukunft? An diesem Nachmittag wollen wir gemeinsam Lösungen erkunden, praktische Ansätze vorstellen und diskutieren, wie eine lebenswerte, ressourcenschonende Zukunft wirklich gebaut werden kann. *Fakten & Inspiration* **Prof. Dr. Michael Braungart** Öko-Design, Leuphana Universität Lüneburg Gründer BRAUNGART EPEA - Internationale Umweltforschung GmbH, Hamburg **apl. Prof. Dr. Niko Paech** Plurale Ökonomik, Universität Siegen Mitgründer RessourcenZentrum Oldenburg, ReparaturRat Oldenburg **Simon Sigg** Projektleiter Reparaturförderung, Entsorgung & Recycling Stadt Zürich *Moderation* **Christel Maurer & Cornelia Huber** *Transfer* Diskussion in Gross- und Kleingruppen

Welcome to the Competitive Play Session. This session takes place every Saturday from 10:45 to 12:15 at the Yonex Badminton Hall Hardbrücke. The number of players on the waitlist one week in advance determines the number of courts booked. If you are on the waitlist but can no longer attend, please remove yourself as early as possible. Players are accepted into the session based on skill suitability. This session is for experienced players looking for quality games. Play is focused on doubles with a competitive mindset and consistent rallies. You should be comfortable smashing, return smashes and keeping up a moderate tempo throughout the session. New players and those who are new to badminton are welcome to join the PM Session (Open Level Play). Payment can be made via TWINT after the session.

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

Topic to be announced. **THANK YOU** *Franklin University* for hosting our meetup! To learn more about *Franklin University*, please visit their website: https://www.franklin.edu/ **DIRECTIONS** Franklin University Fisher Hall 300 E. Main St, Columbus, OH 43215 Map: https://maps.app.goo.gl/jxjBA2hUmS5qrvhq8 Parking is FREE! Please park in Lot C in front of Fisher Hall. See attached map. NOTE: Map the address only. When mapping with Google Maps it may use the Fisher Hall at OSU, which is NOT correct. **Want to sponsor the pizza and/or bar tab?** Please contact me if you would like to sponsor this meetup's pizza and/or bar tab: angelo@mandato.com

We are bringing Microsoft Build sessions to Columbus Ohio! The Central Ohio Azure Meetup and Central Ohio .NET Developer's Group (CONDG) are coming together to bring some of the labs and breakouts from Microsoft Build to your backyard. In this free, 1 day event, you are going to Build stuff with us! And yes, there will be free food. So please RSVP for a head count!

It’s time to take control of your mental health. How do you get rid of stress, anxiety and uncertainty? These emotions are buried deep in your reactive mind. Find out what the reactive mind is, and in the process find yourself. Here is the secret of being positive and free: Thinking positively is not enough. You also have to get rid of the negative thinking. Your mind is like a garden. You can plant many beautiful flowers in it, but if you don't get rid of the weeds when you plant your flowers, the weeds will soon take over the whole garden. A positive thought is like a flower in your mental garden, and a negative thought is like a weed. You cannot expect to have a positive mindset if you continue to have negative thoughts dwelling and growing there. So, how do you get rid of the negative thoughts? That's what this Meetup is all about. Attend this local meeting and find out! The Meetup event will be led by a consultant who had helped many people live happier in life. Be sure to click on the red "Attend" button below to come to this local event. We look forward to seeing you there. This group is created by the Dianetics & Scientology life improvement center.

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

**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

## 🤝 Host Information A co-hosted event by ProductTank Columbus & Women in Product Columbus 💡 About the Workshop AI adoption is stalling across organizations — not because of a lack of motivation or tools, but because it's fundamentally a behavior design challenge. This hands-on workshop applies proven Behavior Design models and methods to help you move from a vague organizational wish to boost AI adoption to 3-5 concrete, testable interventions you can act on starting tomorrow. Whether you're a product manager, on a product team, or just someone trying to get AI to actually stick at work, you'll leave with a clear picture of what's worth focusing on, what to ignore, and how to drive real, sustained adoption — no guesswork required. 🛠️ What to Bring Laptop: Fully charged and ready to go. AI Assistant: Have your favorite AI assistant pulled up. (Dom will be using Claude, but feel free to use whichever assistant you prefer!) 🍕 Logistics & Perks Food & Drink: Pizza and drinks provided! Parking: Plenty of free spaces available on-site. ###