C#

🎉 Come along to the London Scala Talks! 🎉 In this event you'll hear from Caroline Morton and Katrina Petrevice. **Agenda** 6:00pm - 🥤 Doors open. Come along and grab a drink! 6:35pm - 🗣️ Introduction 6:40pm - 🗣️ Katrina Petrevice: Caching in Scala using Ref 7:20pm - 🍕 Intermission: Join us for some free food and drinks! Vegan and vegetarian options are provided. Let us know if you'd like something special - we'd be happy to accommodate. 7:50pm - 🗣️ Caroline Morton: Accidental Functional Programming in Rust (From an Epidemiologist's Perspective) 8:30pm - 🥤 Socialising: Grab a drink and let's discuss the talks. 9:00pm - 🍻 Join us in a pub to discuss the talks! 🌐 **This event has a live stream** Join at **6:35PM** using this link: [https://teams.microsoft.com/meet/23161399678332?p=vEmQadbG1wErf3rGrk](https://teams.microsoft.com/meet/23161399678332?p=vEmQadbG1wErf3rGrk "https://teams.microsoft.com/meet/23161399678332?p=vEmQadbG1wErf3rGrk") **🗣️ Katrina Petrevice: Caching in Scala using Ref** Caching in memory is often one of the first strategies used to improve system performances. However, implementing caching in a purely functional way introduces unique challenges, specifically around state management and testability. In this talk, we will look at how to utilise functional programming principles with [Ref](https://typelevel.org/cats-effect/docs/std/ref), while maintaining clarity and composability. We will also deep dive into some common pitfalls and look into practical ways to test Ref effectively. ⭐ Katrina Petrevice ⭐ Katrina comes from a non–computer science background and was first introduced to Scala while working at JPMorgan. She credits much of her Scala knowledge to hands-on experience within her team, where she works on building and maintaining data pipelines and managing data systems. Since then, she has developed a strong interest in functional programming and now co-leads the Functional Programming Group at JPMorgan, where she helps share knowledge and foster a community around these ideas. **🗣️ Caroline Morton: Accidental Functional Programming in Rust (From an Epidemiologist's Perspective)** I don't have a background in functional programming - and I never set out to write it. But somewhere between writing trait-based epidemiological pipelines, composing data transformations, and leaning hard on Result, enums, and pattern matching, I started hearing from others: “That's pretty functional.” In this talk, I'll explore what it means to write “functional-ish” Rust as someone solving real-world scientific problems. I'll walk through the patterns I reach for - like chaining iterators, avoiding shared state, and embracing expressive types - and reflect on which functional programming ideas emerge naturally in Rust, even if you're not trying. I'll also share how designing for epidemiologists - most of whom are used to chaining functions in Python (like Pandas) or R - has pushed me toward creating ergonomic Rust APIs with Python and R bindings. These tools aim to feel familiar to scientists while leveraging Rust's power and safety under the hood. This is a talk for functional programmers curious about Rust, and for Rustaceans wondering if they've been functional all along. No formal theory required - just real code, real use cases, and a pragmatic perspective from someone building public health tools in Rust. ⭐ Caroline Morton ⭐ Dr. Caroline Morton is a medical doctor, epidemiologist, software engineer, and PhD candidate specialising in synthetic data, epidemiology, and Rust. With 60 peer-reviewed papers and two books on software, she combines deep technical expertise with a commitment to improving scientific workflows. Caroline co-founded the first [Women in Rust](https://www.meetup.com/women-in-rust/) group, fostering diversity and encouraging more women to explore opportunities in systems programming. She leads an open-source project improving codelist management in epidemiology using Rust, creating efficient, reliable tools for health data research. Her PhD focuses on synthetic data methods for epidemiology, particularly using Rust to generate large, realistic datasets. A strong advocate for open science and reproducibility, she contributes extensively to improving software practices through publications, workshops, and open-source projects. 🏡 **Accessing the building** The office space (125 London Wall) has two entrances: * ✅ Use the street level entrance, where the Elsevier volunteers we will be welcoming people (this is the easiest one to find, usually people arrive from there) * ❌ Do not use the entrance above that connects to the barbican walkways. Security guards should redirect you to the street level entrance if you find this one instead. Please try to arrive by 7PM, or the street level entrance will be closed. If you do arrive afterwards, let us know on [meetup.com](https://www.meetup.com/london-scala/events/314293345/) or [Discord #general](https://discord.gg/aRCVCHmHES), and someone will come to fetch you. ———————————————————— 🗣️ Would you like to present, but are not sure how to start? Give a talk with us and you'll receive mentorship from a trained toastmaster! Get in touch through [this form](https://forms.gle/zv5i9eeto1BsnSwe8) and we'll get you started 🏡 Interested in hosting or supporting us? Please get in touch through [this form](https://forms.gle/3SX3Bm6zHqVodBaMA) and we can discuss how you can get involved. 📜 All London Scala User Group events operate under the [Scala Community Code of Conduct](https://www.scala-lang.org/conduct/). We encourage each of you to report the breach of the conduct, either anonymously through [this form](https://forms.gle/9PMMorUWgBnbk1mm6) or by contacting one of our team members. We guarantee privacy and confidentiality, as well as that we will take your report seriously and react quickly.

We're delighted to announce an exciting LSCC event on Wednesday 13th May, in partnership with our friends at Zopa Bank! Join us at the Zopa Canary Wharf office in London for this session and get the chance to flex your architectural design muscles! "So how are we supposed to get great architects, if they only get the chance to architect fewer than a half-dozen times in their career?" — Ted Neward. This quote highlights the need for practice, which is what our LSCC architecture katas provide: a safe, repeatable way to hone your software architecture design skills by simulating architectural challenges. **What's the format?** You'll be split into groups and have a business problem to solve. You'll be tasked with designing a technical architecture to meet that problem context. As with real-life you'll have to manage various trade-offs in your design and interact with a Product Owner to clarify your questions. At the end of the task each team will showcase their architecture and technology choices back to the wider group as part of a group discussion. Whether you're a seasoned coder, software architect or new to the scene, you're invited to share insights, discuss best practices, and learn from fellow participants. No prior session attendance or architecture knowledge is required – just bring your enthusiasm. No laptop is required for this session, we'll provide each group with paper, pens and sticky notes to support the activity. Thank you to the Codurance team that will run the event at Zopa Bank's office. Find out more at https://www.codurance.com/ Food and drinks will be provided with vegetarian, vegan and non-alcoholic options available - thanks to Zopa Bank for sponsoring refreshments and hosting in their great office. **About Zopa** Founded in 2020 with a full banking licence and backed by some of Silicon Valley’s most iconic investors, digital bank Zopa is building the Home of Money. This is a place where financial products deliver good value and managing money is made effortless; deep and long-lasting relationships mean customers are left confident about their choices. One of the UK’s highest rated and most celebrated financial brands, Zopa has been recognised with over 10 British Bank Awards, holds a Trustpilot rating of 4.6/5, and has one of the highest customer satisfaction scores in the industry. Zopa Bank Limited is authorised by the Prudential Regulation Authority and regulated by the Financial Conduct Authority and the Prudential Regulation Authority. https://www.zopa.com/ We look forward to seeing you soon!

Join us for some fun, competitive, but friendly games at our 4-court sports hall. We use Hybrid Kawasaki Kong 500's during the 3-hour session. **PAYMENT** * **Session Fee: £12** * We are cashless, kindly pay the session fee **by midnight** on the night before the session. You are welcome to pay early! You can even pay when you book! See our About page for the full process. * If no payment is received, you will be removed and may even be liable for a late cancellation fee if your spot is not taken. * Please use **“your meetup name + date of event”** as payment reference * **Account name:** Thomas Lam * **Sort code:** 04-00-03 * **Account number:** 7478 8608 **LATE CANCELLATION OR NO-SHOW** * **All** **no-shows or late cancellations** (24 hrs or less) will be charged if your spot is not taken by someone else - you will have a title next to your name with the amount and date owed. * Members with 2 no shows/late cancellations will be removed from the group unless outstanding payment is received * **The late cancellation policy** is set up to discourage last-minute cancellations and therefore applies with or without the presence of a waitlist * **Note:** If you are on the Waitlist and a spot becomes available, you will automatically be bumped onto the On list provided the event has not yet started. It is your responsibility to **remove yourself from the waitlist** if you can no longer make it to avoid being charged a no-show if someone cancels late. **PLAYING** * Please wait to be marked off before entering the hall. * Sessions are to finish promptly on the hour by school requests. * If you finish a match with 5 minutes to go, please start packing up instead of starting a new game. **RACKET HIRE** * Please note that we won't be hiring out rackets, so kindly bring your own racket. **PARKING** * There is parking available, but it is now paid parking. Parking is opposite the entrance. Please check the signs for parking payment instructions. **TRACK & TRACE** * We will collect your phone number on-site. Your phone number will also be used in case of fire to contact you if you have not made it to the fire evacuation areas. You can see maps at the venue. We are excited to see you guys on the court! Team LSBC

**BOOK HERE**: https://sportas.co.uk/games/48841 **Game Description:** 👟 Drills led by experienced players who also join the session. 💪 Intense volleyball skills practice for individuals. 🎮 Drills and game setting. 🌟 Positive co-learning environment for rapid improvement. 🏐 Access to 18 volleyballs. Rules \- point to 15 \- max 2 games in a row \- 3 team of 6 players \- modified games situation might be applied depending on situation \(5:1\, modified 5:1 or 6:2 etc\.\) \*Privacy policy for drills and games sessions\* You may not record any footage or take photos during the session unless explicitly authorised by the organisers.

**BOOK HERE**: https://sportas.co.uk/games/48365 **Game Description:** Mixed indoor volleyball games **Rules** Not suitable for beginners

**BOOK HERE**: https://sportas.co.uk/games/48004 **Game Description:** Please be aware that our sessions are also on our own mobile app. Therefore, the number of participants you currently see may not reflect the total number of participants. To participate in this session, your first step is to attend one of our coaching sessions and receive approval from one of our experienced coaches. Our game is designed for players who possess a strong understanding of the sport and are eager for a more challenging experience. With fast-paced rallies, strategic plays, and a competitive atmosphere, you'll have the opportunity to refine your technique, enhance your agility, and strengthen your teamwork. This environment provides the perfect platform to elevate your volleyball skills and strive for victory. Join our vibrant community of passionate volleyball enthusiasts and prepare to showcase your talent on the court. Let's come together to play, learn, and excel in this exhilarating intermediate-level volleyball game! **Rules** By booking this session, you acknowledge and agree to comply with our terms and conditions, privacy policies, and cancellation policy, which can be found below. Participation in this session requires prior approval from one of our coaches during our coaching sessions. Kindly be aware that booking this session without a pre-existing invitation may lead to potential denial of entry, with no refund available. **Terms & Conditions at:** https://www.littlegiantsvc.com/terms-and-conditions **Privacy Policy at:** https://www.littlegiantsvc.com/privacy-policy **Cancellation Policy:** Bookings are non-refundable, non-transferable and non-exchangeable. This includes tournaments, volleyball camps, monthly memberships, 1-on-1 and 1 to 6 trainings & team membership fee. Social sessions are exchangeable if we are contacted within 24 hours prior to attendance at a social or coached session to transfer payment to your preferred date(within 30 days of the original booking) Little Giants VC will contact you in the event of postponement or cancellation to work with you.

**BOOK HERE**: https://sportas.co.uk/games/48782 **Game Description:** We’re opening up \*\*2 courts at In2Sports\*\* for a fun \*\*King/Queen of the Court–style tournament\*\*. Here’s how it works: 🏐 \*Format\* \- 2 matches at the same time \- Winners move to \*\*Court A\*\*\, losers referee the next round before playing again \- Teams rotate based on match results \- Matches are \*\*12 minutes each\*\*\, aiming for \~8 rounds total \- Max \*\*3 consecutive wins\*\* on Court A \(after that\, the challenger stays regardless of result\) 🌈 \*Rules\* \- Mixed net height\, \*\*no gender restrictions\*\* \- Hosts manage timekeeping ⏰ \- Resting teams help with refereeing 🚩 \- Court A videos uploaded to Balltime\.ai for rewatching 🎥 and highlights editing\. 💸 \*Sign Up Options\* \- 👥 \*Team signup\*: £60 per team \(≈£10 pp\) \- 👤 \*Solo signup\*: £12 per player **Rules** -Winner stays on (maximum 3 consecutive games) -Each game lasts 12 minutes -Court winners move on to play each other in the next round -Mixed net – all genders welcome -Teams rotate as referees when not playing -6 teams total, with 6–7 players per team \*Privacy policy for games sessions\* By attending this game session, you agree to the following: \* Video recordings/photos are allowed only during the games \* Attending means consenting to recordings by the organiser which will be shared via private links \* Distribution limited to session participants only \* Explicit consent required for any public sharing \* Respect others' privacy and comfort \*Please contact the co-organisers if you have any questions about the policy.

**BOOK HERE**: https://sportas.co.uk/games/48273 **Game Description:** 🎮 Warm up and game only setting. 🌟 Positive environment. Rules \- point to 15 \- max 2 games in a row \- 3 team of 6 players \- modified games situation might be applied depending on situation \(5:1\, modified 5:1 or 6:2 etc\.\) —- \*Privacy policy for games only sessions\* By attending this game session, you agree to the following: \* Video recordings/photos are allowed only during free game\* sessions \* Attending implies consent to potentially being recorded by other participants \* Any videos must only be shared via private links \* Distribution limited to session participants only \* Explicit consent required for any public sharing \* Respect others' privacy and comfort \*Please contact the co-organisers if you have any questions about the policy.

3rd Sunday of every month, unleash your inner language ninja with our fun Mandarin learning games! Get ready to ditch stale textbooks and rote memorisation, and watch your language skills truly skyrocket! These monthly gatherings are designed for you to: * **Boost Conversational Confidence:** Engage in lively, real-time communication that feels like play, not practice. * **Sharpen Your Listening Skills** as you navigate thoughtfully designed game scenarios and interact with fellow learners. * **Expand Your Vocabulary:** Effortlessly pick up new words and phrases, enabling you to express yourself with precision and richness. * **Retain More, Stress Less:** Experience the power of learning through fun, making new vocabulary and grammar stick with less effort! **What Makes Our Language Games Special:** Unlike traditional lessons, our sessions are a unique blend of structured fun and effective learning: * **Immersive & Interactive:** We transform language concepts into engaging, team-based games that facilitate natural conversation and active participation. * **Relaxed & Supportive Environment:** Forget competition! Our classroom setting is designed to be comfortable and non-intimidating, encouraging everyone to experiment and learn at their own pace. * **All Levels Learn Together:** You'll consolidate what you already know while effortlessly picking up new vocabulary from our well-facilitated activities. * **Expert Guidance:** Our experienced tutor provides active language support, ensuring every activity is both enjoyable and highly effective for language improvement. * **Suitable for All Levels!** (For beginners: if you have more than 20 hours of Mandarin learning, you're good to join us!) **Session Details:** 🗓️ **When:** 3rd Sunday of every month ⏰ **Time:** 2:00 PM - 4:00 PM **💰 Price:** £10 - [Tap for Easy Payment](https://monzo.com/pay/r/china-unbound_eTW5aAZoqiDQ3p) (To secure your spot, please complete payment when you RSVP) Join us, and accelerate your road to fluency today! We can't wait to welcome you. \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- **Take your Mandarin beyond the event.** 🤝 If you’re looking for a bit more structure to go along with your conversation practice, let’s chat! We're offering **FREE 1-on-1 advice sessions** to help you find the perfect learning path. Get a professional assessment of your level so you can study with confidence. **No commitment** required. [Book your Free Session](https://eu.bigin.online/org20070515371/bookings/course-advice) \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- **China Unbound** is the best place to learn practical Chinese for adults. While most schools prioritise grammar and writing, China Unbound empowers you to confidently converse, understand, and actively apply Chinese in real-world situations. Join us and discover a fun, fast, and personalised way to master Chinese! \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- **Hear From Our Learners:** "The Language games session provides a well-structured and immersive way of learning. Even as a beginner I am able to practice all aspects of the language and have learnt a lot whilst having fun!" - Jeremy Smithers "The Sunday games session is in a classroom environment but relaxed with organized team-based games designed to facilitate conversation. It’s a good way to consolidate what you know and pick up some new vocab. The folks who attend vary massively in ability so it’s not competitive, but more a chance to learn from people who are more advanced and help along newbies. I recommend it!" - Mark Mansell **FAQ 常见问题::** **What if I don’t feel my Chinese is good enough to join?** Don’t worry, our hosts will be on hand to offer support and help you participate. Many are also group exercises, so you can lean on stronger members too. **What games will I be playing?** You'll be diving into a variety of engaging and interactive language activities specifically designed to match your proficiency level! Think fun, familiar formats like Articulate, and creative role-play scenarios. Our games are carefully designed (by us!) to intensively develop your speaking and listening abilities, providing you with comprehensive language input. In addition, every game is expertly facilitated by our experienced tutors. They provide real-time support and guidance, ensure activities are well-structured for optimal learning, and offer clear explanations and consolidation of any new vocabulary or concepts that emerge. It's learning through play, with expert support! **I’m not into games, is it still for me?** Yes!! Think of it as immersive practice, not gaming. Even if you’re not a gamer, you will enjoy learning Mandarin this way! Our activities are designed to boost your vocabulary, pronunciation, and fluency in a natural and engaging way. **Are there any discounts for Chinese lessons for members?** Yes, you can use code MEETUP10 for your exclusive £10 discount on our [Chinese courses](https://china-unbound.co.uk/personal/) site-wide!

**BOOK HERE**: https://sportas.co.uk/games/45711 **Game Description:** Come and play in a Saturday evening Mid-Intermediate & Above volleyball session in Canary Wharf 🏙️ ❗️Please be considerate & only sign up to this game if you’re a MID-INTERMEDIATE player or above. If we think you are a beginner/lower-intermediate player we will cancel and refund you from the game❗️ 💦 Water fountain, showers and changing rooms available on site 🧭Directions: 🚶‍♂️5 minute walk from Canary Wharf station **Rules** \- 3 teams of 6 \- Games to 15 points \- Max 2 games in a row \- Please be kind and respectful to all players 🧡

**BOOK HERE**: https://sportas.co.uk/games/47974 **Game Description:** Come and join a mid intermediate session in Canning Town 🚨Directions🚨 📍Enter via Morgan Street 🚶‍♂️5 minute walk from Canning Town Station🚗 Free car parking on site 🚿 Showers, changing rooms, water fountain & toilets are present **Rules** \- 3 teams of 6 \- Games to 15 points \- Max 2 games in a row \- Please be kind and respectful to all players 🧡

**BOOK HERE**: https://sportas.co.uk/games/48733 **Game Description:** Social fun mixed and beginner friendly badminton session based in East London. Founded in 2024 delivering weekly badminton sessions 🏸 Please note even if session isn't full, there will attendees coming internally :) Find more about us at @sportingdllm (IG)! **Rules** Mixed doubles up to 21! always be friendly, respectful and match each other levels. We all started somewhere!

**BOOK HERE**: https://sportas.co.uk/games/48448 **Game Description:** 🎮 Warm up and game only setting. 🌟 Positive environment. \*Privacy policy for games only sessions\* By attending this game session, you agree to the following: \* Video recordings/photos are allowed only during free game\* sessions \* Attending means consenting to potentially being recorded by other participants \* Any videos must only be shared via private links \* Distribution limited to session participants only \* Explicit consent required for any public sharing \* Respect others' privacy and comfort \*Please contact the co-organisers if you have any questions about the policy. **Rules** \- point to 15 \- max 2 games in a row \- 3 team of 6 players \- modified games situation might be applied depending on situation \(5:1\, modified 5:1 or 6:2 etc\.\)

**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** TBD **YouTube Link** TBD

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

We will show how to build custom agents with Microsoft Agent Framework. Attendees will learn how to build and custom host agents when Microsoft Foundry is not a viable option.

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!

FREE event [https://www.ccad.edu/chroma](https://www.ccad.edu/chroma) Friday, May 15, 3–7 p.m. CCAD campus, 60 Cleveland Ave, Columbus, OH Join Columbus College of Art & Design for *2025* *Chroma: Best of CCAD*, our annual campuswide exhibition showcasing outstanding student work from across the college’s academic programs. This faculty-juried show features select work from CCAD students of all class years, and is a can’t-miss end-of-year campus celebration recognizing their tremendous achievements. It’ll be a night of fun and entertainment, with interactive games, animation and film screenings, art symposiums, poetry and prose readings, and more (along with some of the best local food trucks). *Chroma* is free and open to all. Many exhibitions including... **Game Art & Design:** **DSB, first floor, Welcome Center lobby and Room 115**

**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 John Lairson will share a notebook describing the Alpaca (Paper) Trading API and discuss different algorithms for evaluating stock trades. 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