Kevlin Henney

Immutable Value A pattern for keeping value objects simple and free of change

On the blog: Immutable Value

"There is much about both immutability and value-based programming that might appear obvious, but this is the benefit of progress coupled with the gift of hindsight."

kevlinhenney.medium.com/immutable-va...

One for the @kevlin.bsky.social collection in our local supermarket.

YOW! Melbourne 2025

In December I'll be at YOW! @yowconf.bsky.social in Melbourne, Brisbane and Sydney giving my talk, "The Past, Present and Future of Programming Languages"
yowcon.com/melbourne-2025
yowcon.com/brisbane-2025
yowcon.com/sydney-2025

Next month, I'll be...

In Paris at NewCrafts @newcrafts.bsky.social, where I'll be giving my talk, "Get Kata"
ncrafts.io

In London at SDD Deep Dive @sddconf.bsky.social, where I'll be running my popular "Architecture with Agility" workshop
sddconf.com

Codecamp_Festival Iasi 2025 Join Codecamp in Iasi, Bucharest, Cluj, Timisoara to learn, share, and connect with the IT community.

This month, I'll be...

In Iași at CodeCamp, where I'll be giving a new talk, "Modular Monoliths and Other Facepalms"
codecamp.ro/codecamp-fes...

In Bristol at BristolCon @bristolcon.bsky.social, where I'm giving a reading, moderating a panel and appearing on two other panels
bristolcon.org

Assigning agency to techniques seems to me to be an attempt to avoid responsibility. “I used TDD & got poorly designed/unreliable/hard to understand code—not my fault.”

Immutable Value A pattern for keeping value objects simple and free of change

On the blog: Immutable Value

"There is much about both immutability and value-based programming that might appear obvious, but this is the benefit of progress coupled with the gift of hindsight."

kevlinhenney.medium.com/immutable-va...

Join me at @newcrafts.bsky.social in Paris on 6th November for my session, Get Kata. There will be code, craft, maths, lambdas, polyglottery and warp drive.

ncrafts.io/speaker/kevl...

I think this is now a recognised pattern/task, and may trigger a separate orchestration.

I just tried this with ChatGPT and Gemini. Both slow, but both correct.

I then asked how they determined the answer: ChatGPT said it focuss on the letters and count through; Gemini generated Python code.

Panel 1 A figure stands at a lectern "This image illustrates my theory that, presented with a sufficient quantity of intricate formulae, overcomplicated diagrams and impenetrable acronyms, an audience will agree with almost anything." The screen is completely packed with such things Panel 2,3,4,5. Four audience members say enthusiastically: "My thoughts exactly!", "Hear, hear!", "I quite agree!" and "Excellent point!"

My latest cartoon for @newscientist.com
p.s. My new book of science cartoons 'Physics for Cats' is out this week. Details at www.tomgauld.com

Join me at @newcrafts.bsky.social in Paris on 6th November for my session, Get Kata. There will be code, craft, maths, lambdas, polyglottery and warp drive.

ncrafts.io/speaker/kevl...

🙏

Love this bit from the end:

"Familiarity creates a distorted lens through which we evaluate new concepts"

Often we don't realize this is happening.

👍

Don't change that... 😉

Immutable Value A pattern for keeping value objects simple and free of change

On the blog: Immutable Value

A pattern for keeping value objects simple and free of change, with added historical context and commentary

kevlinhenney.medium.com/immutable-va...

The Collaboration sessions dive into people and team dynamics. We will explore subjects like alternative ways to handle conflicts, team topologies, continuous experimentation or even constructive anarchism. You will surely find new ideas to bring out the best of your teams!
👉 buff.ly/mWxJ2Mq

Immutable Value A pattern for keeping value objects simple and free of change

On the blog: Immutable Value

A pattern for keeping value objects simple and free of change, with added historical context and commentary

kevlinhenney.medium.com/immutable-va...

Step Back Take a break to solve a problem

Blogged: Step Back

"To think different you need to be different. Change your pace and your context. Let your thinking loosen. Foster your creativity in the background by doing something else in the foreground."

kevlinhenney.medium.com/step-back-39...

*coats flying off the rack*

😄

😄😄😄😂🤣

A classic @kevlin.bsky.social appears

I was hoping to plan a tube route, but the TfL site has other ideas...

Step Back Take a break to solve a problem

Blogged: Step Back

"To think different you need to be different. Change your pace and your context. Let your thinking loosen. Foster your creativity in the background by doing something else in the foreground."

kevlinhenney.medium.com/step-back-39...

Fascinating pointer from @kevlin.bsky.social and James Lewis: cepr.org/voxeu/column...
"[Professions using AI] worked roughly 3.15 hours more per week in the post-ChatGPT period. When AI complements human labour rather than replacing it, the process makes each hour of work more valuable."

#GOTOConf

My last couple of weeks on Instagram:
Copenhagen · Kongsberg · Manchester · Bristol · Aurland · Bergen
instagram.com/kevlin.henney

Step Back Take a break to solve a problem

Blogged: Step Back

"Instead of trying harder, do the opposite. Take a break. Properly. Don't just switch to another screen to browse memes, graze cat pics, answer your email or catch up with notifications, messages and socials."

kevlinhenney.medium.com/step-back-39...

🙃

My last couple of weeks on Instagram:
Copenhagen · Kongsberg · Manchester · Bristol · Aurland · Bergen
instagram.com/kevlin.henney