C#

**Tuesday Badminton Session – 8:00–10:00pm at Queen Mother Sports Centre, Victoria** **Venue** Queen Mother Sports Centre (Everyone Active), 223 Vauxhall Bridge Road, SW1V 1EL It’s a 5‑minute walk from Victoria Station. Full sports hall with 5 courts. **RSVP Required** Everyone attending must RSVP in advance. Members can also confirm by email or text. **Session Fee** £14 per session Includes premium feather shuttles. **Payment** Please pay at the start of the session. First‑timers must pay in cash due to previous no‑shows and non‑payment. All first‑timers must also register on our in‑house MatchMaking app before joining the courts. If you haven’t registered, you won’t be able to start playing. Mobile reception in the hall is poor, so if you are set up to pay by bank transfer, you must pay in advance before attending. If we have to chase payment afterwards, the fee becomes £20. Bank transfer is available from your second session onwards once it’s set up and we confirm your playing level fits the standard of the club. Please only attend if you have RSVP’d on Meetup and are able to pay the session fee on arrival or have already transferred in advance. If payment still isn’t settled, you will be removed from the group and blocked from attending future sessions. The same applies to no‑shows who do not release their RSVP within the cancellation policy. **Membership Options** We are a membership‑based club and offer several membership options if a place is offered to you and your playing level fits the club. If membership isn’t for you, pay‑as‑you‑play is also available by RSVP on meetup. Full details: [https://www.sidsbadmintonclub.org.uk/membership.php](https://www.sidsbadmintonclub.org.uk/membership.php?utm_source=copilot.com "www.sidsbadmintonclub.org.uk") **Skill Level** We keep a good standard at our Tuesday sessions, but don’t worry if you’re a bit rusty or haven’t played for a while. We’ll help you find your level. Our MatchMaking app grades you over your first three consecutive sessions, and we offer a three‑session trial for £36 so you can settle in and see where you fit. As a guide, Tuesday sessions are for intermediate to strong intermediate ladies, and strong intermediate to advanced men. If you’re unsure of your level, come along — we’ll assess it on court and point you in the right direction. **What’s Included** • Premium feather shuttles (Yonex, Yehlex, Victor) • 5 courts • Fair and organised rotation • Players grouped by level • Optional grade‑based competitive courts in the last 30 minutes when possible. • MatchMaking app available for those who want to track results **Cancellation Policy** Please cancel at least 12 hours before the session. Late cancellations or no‑shows will be charged the full fee. Outstanding fees must be cleared before attending again. **Parking** Free after 6:30pm on single yellow lines and after 7:00pm on single red lines. Always check local signs. **Liability** Sid’s Badminton Club is NOT responsible for personal property loss or injury. **Questions** Message us on Meetup or email info@sidsbadmintonclub.org.uk Website: [www.sidsbadmintonclub.org.uk](http://www.sidsbadmintonclub.org.uk/) Looking forward to seeing you on court. Sid’s Badminton Club

uSwitch is located on the first floor of the ZPG building at 5 Copper Row, London, SE1 2LH, London (Click on the map for directions) What 3 words location: [https://what3words.com/puts.sudden.else](https://what3words.com/puts.sudden.else) The Clojure dojo is a collaborative way to learn Clojure/ClojureScript through practice. The aim is to learn a little more than before you started. This event is for those new to coding through to more experienced developers. We organise into small groups (2-4) people and write code to solve challenges great and small, chosen by those at the event. We aim to ensure someone in your group has some Clojure experience, so you shouldn't feel lost (well no more than all developers do when Stack Overflow is broken). Example challenges for the coding dojo are listed on this website: http://www.londonclojurians.org/code-dojo/ Various past exercises have been loaded to [https://github.com/ldnclj](https://github.com/ldnclj/lisp1.5/blob/master/src/lisp1/5.clj) # Approximate schedule: 18:40 Doors open and start collecting suggestions 18.45 Pizza should have arrived 19:00 Quick intros and vote on suggestions 19:15 Break out into groups and start practising 20:45 Gather together for a quick show and tell # What should I bring? We organise into small groups, so if you have a laptop with a working Clojure environment please bring it along (there are lots of online Clojure environments, so you can just use your browser too). # How do I get in to the building? At the glass doors press the buzzer to inform the security guard you are here. Say you are here for the event on the first floor. Is there way to talk with the Clojure community? Why yes. The Clojurians Slack channel is full of friendly people who love to try and help. People based in London are often in the #clojure-uk channel. Sign up for a free account to the Clojurians Slack community via http://clojurians.net/ What is Clojure? Clojure is a JVM language that has syntactically similarities to Lisp, full integration with Java and its libraries and focuses on providing a solution to the issue of single machine concurrency. Its small core makes it surprisingly easy for Java developers to pick up and it provides a powerful set of concurrency strategies and data structures designed to make immutable data easy to work with. If you went to Rich Hickey’s LJC talk about creating Clojure you’ll already know this, if not it’s well worth watching the Rich Hickey “Clojure for Java Programmers” video or Stuart Halloway “Radical Simplicity” video .

**BOOK HERE**: https://sportas.co.uk/games/45397 **Game Description:** Come and play Tuesday evenings Lower-Intermediate volleyball session in Poplar 🔥 Picturesque court with plenty of serving space and also space to stay warm on the side when your team is off waiting for the next game 🙌 **Rules** 3 teams of 6 Games to 15 points

**BOOK HERE**: https://sportas.co.uk/games/46651 **Game Description:** Come and join our badminton session in Canning Town 🔥 Join our whatsapp Group: https://chat.whatsapp.com/LsLjg8CxI8MIxSFb82qkdb Music 🎶 3 courts, social session - the general ability is mid intermediate. There will be spare rackets but please bring your own racket if you do have one. 1 new tube of FEATHERED shuttles will be provided per session, plus a set of Yonex 300 plastic shuttles. 🚪 Getting Into the School 1\. The school is surrounded by a green fence\. 2\. Entrance is near the stone wall\. 3\. At the gate\, find the intercom on the right\-hand side\. 4\. Press the ‘Call’ button and wait for security to respond\. 5\. When the intercom flashes green\, push the gate open\. \-\-\- 🏸 Finding the Indoor Court 1\. After entering\, go through the visitor gate\. 2\. Follow the corridor to the end\. 3\. Look for the yellow double doors – the badminton courts are inside\! \-\-\- 🚻 Facilities 🔹 Changing Rooms & Toilets \- Located outside the court area in the corridor\. \- Male facilities – right\-hand side\. \- Female facilities – left\-hand side\. 💧 Water Points \- There are three water points in the corridor outside the court\. \- Bring a water bottle to use with the water pump\. Enjoy your game! 🏸🔥 **Rules** Games to 21 Max two games on Max one game off

**BOOK HERE**: https://sportas.co.uk/games/45377 **Game Description:** Come and play in a casual​​​​​​​​​​​​​​​​​​​​​​,​​​​​​​​​​​​​​​​​​​​​​ friendly & social badminton session. The session is for mixed ability players (mainly beginners & intermediate players). So please be respectful and kind towards less experienced players - we all have to start somewhere 🧡 🌱 We use YONEX MAVIS 300 Nylon Shuttlecocks. 🏸 We have a few spare rackets if needed. Format: We play doubles for the whole time and keep rotating opponents/partners across courts so everyone plays each other. Venue: 🚪Entrance to the sports hall is on the corner of Celebration Avenue and Temple Mills Ln 🧼There are showers, changing rooms & a water fountain at the venue 🚶‍♂️5 minute walk from Stratford International DLR Station 🚗 Paid car parking is available on site **Rules** Classic doubles rules - can be explained at the start of the session if you’re new to badminton or need a reminder 🤝

**BOOK HERE**: https://sportas.co.uk/games/43447 **Game Description:** Join us for a friendly game of Social Dodgeball in Bromley. We will be playing a mix of casual and fun games! Find out more about PB Dodgeball here - www.pbdodgeball.co.uk **Rules** British Dodgeball Rules No headshots

Join us for our next Emacs London meetup held at University College London (UCL). A projector will be available, if anyone wants to give a presentation and/or if helpful to share Emacs tips, for some collaborative debugging, etc. We might head to a pub for a drink and/or a nibble afterward. Emacs users of all levels welcome! Interested in Emacs but not really a user? You're more than welcome too! **Call for presentations** Fancy talking about your favourite Emacs package? Proud of your latest Emacs Lisp hack and you want to tell everybody? Anything parenthesis-related that's bugging you? There'll be a monitor waiting for you for a short presentation!

This month we're doing something a bit different. Edward Boggis-Rolfe has very kindly offered to host us at the moorings where he has a boat, just up past Tower Bridge. We'll have access to a small event space, right on the river, which is covered, but outdoors. We'll have a BBQ going, serving sausages, and free drinks. The cost of the food and drink is being covered by Undo - so thanks to Undo, too! But rather than just be a social event, we do want to include some C++ content, too. We'll have access to a screen and projector - but whether we'll be able to use them depends on the weather! So we're inviting anyone that wants to give a **lightning talk** to let us know. The one caveat is that you'll need to be prepared to give it *without slides* if we can't use the projector (we should have audio, at least). As an extra incentive we'll be holding back a few places for people who can give talks. Spaces will be limited overall, but if you do a talk your place is assured! So submit your ideas here: [cppldn.uk/speak](https://philnash.typeform.com/to/pJVp7s) 5 minutes, something related to C++, slides optional. Go!

🎉 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 may have a live stream** Watch this space for more details. **🗣️ 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. ———————————————————— 🗣️ 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.

**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.

**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 🧡

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!

**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.

Come out to Improving for our monthly iOS and Mac meetings. This Month's Presentation: Nothing yet. (You should volunteer). 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/

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