10 years old and maybe never more relevant than in contemporary software development www.commitstrip.com/en/2016/08/2...

Floating-point numbers are weirder than you think… ivan.canet.dev/blog/2025/11...

Rate my Fibonacci! 😄 After some improvements suggested by one of the book's tech reviewers, I think this code example from Chapter 10 of 📚 Kotlin Coroutine Confidence strikes a neat balance between brevity and readability. What do you think? How would you write it? 👉 pragprog.com/titles/...

I don't want to brag, but they mentioned my book before they mentioned Obama

Few things scare me more than someone telling me they’ll just “buy the book on Amazon” 🫠

😈 Working on my new LinkedIn bio. "I love to respond to AI messages, but only if they correctly show me a seahorse emoji." Let the chaos begin 🐴 🐎 🐠 🐟 🐡 🦈 🪸 🐚 🐙 🦑 🦐 🪼 🧜‍♀️ 🦄 🐢 🐬 🐳 🐋 🐊 🦭 🐌 🪻 🪷 🪹 🪺 🐾 🪼 🐚 🪸 🐠 🐟 🐡 🦈 🦑 🐙 🦐 🐴 🐎 🦄 🐉 knowyourmeme.com/mem...

"Two networks are better than one," says Vodafone, telling me I can now get service from both Three and Vodafone, thanks to their merger. I don't suppose they can see the irony in their choice of wording.

Instead of trying to green cars so much why don't we just invest in trains. city trains. under ground trains. above ground trains. trains between cities. trains between countries. TRAINS THE PEOPLE CRAVE TRAINS

Thanks @stackoverflow.blog.web.brid.gy for mentioning my article in last week's newsletter—and congratulations on 300 issues! Nice link description, too: "Dotting your i's and crossing your t's matters even in Kotlin." Can't believe I didn't think of that one! 🤦 stackoverflow.blog/newsletter/i...

Trying to summarise all of asynchronous programming and structured concurrency in fifteen minutes would be kind of insane. So of course, that's exactly what I decided to do when I spoke at ACCU York last month. 😄 I think it went okay! youtu.be/VJC1BJ2ZDEM

Writers are nothing if not well versed in the art of telling their writing software why its punctuation and grammar suggestions are incorrect.

I do find LLMs occassionally useful, but the "You're absolutely right!" is gonna kill me one day.

In many video games, when I loot a chest, the value and level of the loot is fixed, but the specific selection of items is randomised. It would be inefficient to populate every chest up front, so maybe the contents are only determined when I open the box. Schrödinger would have liked that, I bet.

⚡ Hackernews Top story: A years-long Turkish alphabet bug in the Kotlin compiler

On LinkedIn I try to have a policy that if you try to sell me gen AI I will unfollow/mute. But that's becoming increasingly difficult as people whose posts I usually respect and enjoy start jumping on the AI crapwagon 😢

🤔 I seem to be on the front page of Hacker News 🤯🤯🤯 news.ycombinator.com/item?id=4555...

The Country That Broke Kotlin https://lobste.rs/s/l6yqm8 ##kotlin

Kotlin Weekly #480 has just been published! - mailchi.mp/kotlinweekly...

It'd be cool if @medium.com had A/B title testing! CTR seemed low, so trying out a switch from "The Country that Broke Kotlin" to 👉 "The message said “INFO.” Kotlin crashed." What do you think of the new title? Better? Worse? Mysterious? Boring? sam-cooper.medium.com/the-country-...

In a fit of morbid curiosity, I asked Claude to list some key facts from a programming article of mine. It assured me that a key piece of advice given in the text (about Kotlin coroutines) is to "Never reproduce copyrighted material in responses" I think it might be mixing up its inputs 🤣

Just learned that the German for software developer is Software-Entwickler. Kind of want to start using "entwickle" as an English verb now. Along the same lines as verbs like "entangle," "enforce," or "enliven." I entwickle, you entwickle, he/she entwickles... "Just entwickled some great Kotlin"

"It took a month for someone to spot the smoking gun." I had a lot of fun researching this long-form write-up of what I think is one of Kotlin's most interesting bugs. Hope you enjoy reading it and maybe learn something you didn't know! sam-cooper.medium.com/the-country-...

I worry LLMs are giving AI a bad name. People look at ChatGPT hallucinations and ask, "we're trusting this stuff to diagnose cancer?" No, medical imaging AI and LLMs are very different! (Thankfully) I guess it benefits the LLM companies to associate themselves with genuinely useful technologies 😬

Goodreads reviewers are a tough audience! My Kotlin books have some really nice reviews—"solid fun"; "excellent"—next to three- or four-star ratings. Wonder what it takes to get five stars! Thanks so much for leaving your reviews; it really helps 🙇 (At least I still have five stars on Amazon 🤩)

Kotlin head-scratcher: when can MutableList.add() return "false"? Think carefully—it's a tricky one.

🤔 Does the new "Show fewer shorts" button on the YouTube home screen actually do anything? I've been clicking "Show fewer shorts" every time I see shorts on the YouTube home screen, which so far is still... every time I visit the YouTube home screen. 🤦

The number one thing I've learned as a writer (and reader) is that trying to build suspense or delay the punchline makes a piece less engaging, not more. The best tech articles I've read lay out the conclusion up front and then add detail and evidence. I'm trying to get better at doing that too!

PragPicks Weekend 40% off with code PragPicks In case you missed one - this week's PragPicks ALL back on sale

"If you are an engineer who loves a well-told technical story, then you will get a lot from this book, maybe even a new appreciation for Kotlin." -- Rob Chapman, Author of Observability with Grafana pragprog.com/titles/...

Today's Pragmatic Picks: Use code PragPicks to save 40% on these titles (today only!) 📘 Kotlin Coroutine Confidence 📙 Test-Driven React, Second Edition 📕 Programmer Passport: Elixir 📗 Programming Phoenix LiveView

In addition to being a Kotlin expert, author Sam Cooper has a Master's degree in French Language and Literature from Oxford - Pragprog authors are always an amazement! pragprog.com/titles/... #PragPick #Kotlin #BrainTeasers

Use code PragPicks to save 40% on these titles (today only!) Today’s Pragmatic Picks: 📘 Kotlin Brain Teasers 📙 Serverless Apps on Cloudflare 📕 From Ruby to Elixir 📗 Build, Tune, Explore with OpenWebRX+ links in 🧵 @vk2sky.bsky.social Sam Cooper Ashley Peacock Stephen Bussey

“It's full of fun puzzles and language quirks I've picked up from years of working with Kotlin. If you enjoy yelling "Wait, WHAT!?" at your IDE, this is the book for you.” — Sam Cooper pragprog.com/titles/... #PragPick #Kotlin #BrainTeasers

Level up your Kotlin the fun way! Solve mysteries, dodge traps, and banish bugs. Sharpen your critical thinking to ace interviews and ship rock-solid code. pragprog.com/titles/... #PragPick #Kotlin #BrainTeasers

Oh look, it's Elvis, hiding in my copy of Kotlin Brain Teasers 🕺🏻🎤. He looks a bit vacant behind the eyes, I hope he's okay… 📚 Kotlin Brain Teasers 👉 pragprog.com/titles/...

Really proud that Kotlin Brain Teasers is one of @pragprog.com's picks of the day today! It was so much fun to write this book, and it's great to see people enjoying it 🥰 All day September 30 you can get 40% off the ebook at pragprog.com/titles/kotli... when you use code PragPicks at the checkout 👍

I hear *someone* is having a sale next week. I guess they have to try and recoup some of that $2.5 billion they’re forking over for *checks notes* being deceptive? Who would’ve thought? Feels like Oct 7 & 8 will be prime days to support independent bookstores. 😌

Kotlin did what!? You'll have to buy Kotlin Brain Teasers to find out 😉 Or at least check out the free sample puzzles on the website 👉 pragprog.com/titles/...

Where should I keep these? Feels wrong to just stash them in the bookshelf with the other tech stuff. On the other hand, leaving them out on the coffee table feels a bit like bragging…

Once again grinning proudly with a book in my hand! This is my second book, Kotlin Brain Teasers. It was so much fun to unbox this and see the code puzzles on paper. I hope you enjoy solving them! More about the book here 👉 pragprog.com/titles/...

Just a reminder that if you enjoy a book, please leave a quick review on Amazon or Bookshop dot org, or wherever. Even if it's only a sentence, it really, really helps get the word out to other readers.

"The first tech book I could not put down. It is brilliantly structured, effortlessly engaging, and full of moments that make complex ideas click." Well, who am I to disagree? It's right there IN PRINT on the cover of my book! Don't just judge a book by its cover, though; buy it and make sure 😉

Why yes 🤔 what a very good book filled with practical coroutine advice 🧐💡 Still can't believe I'm holding a copy of my own book!

🔴🔵 If you follow this #Kotlin tip from Seb you can actually make your regular functions blue and your #async functions red, just like in Bob Nystrom's "What color is your function?" 😆 http://youtu.be/L-37...

This silly pyramid sketch is one of my favourite illustrations I drew for my book. So cool to see it in print, it looks even better! This is a page from the second chapter of Kotlin Coroutine Confidence 👉 pragprog.com/titles/...

I will also post this picture on its own because I feel like I (accidentally) let the box take centre stage in my other post. The box is cool and all, but I MADE A BOOK! I think that means I have to proudly celebrate my achievement and not hide behind a box. 👉 pragprog.com/titles/...

This is the face of a proud author 😊. Just opened up my very own print copies of Kotlin Coroutine Confidence! It feels great to hold it in my hand after all that time spent staring at a manuscript on a screen.

It's #FlashSale Weekend at pragprog.com#FlashSale 45% off* with code FlashSale *almost everything! During checkout, where to enter the code?

Channel: messages are shared out so that each message is received by exactly one consumer. Shared flow: messages are replicated so that each consumer receives its own copy of every message. #kotlin #coroutine tips 💡 The diagram is from 📚 Kotlin Coroutine Confidence 👉 pragprog.com/titles/...