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Ingvar Stepanyan

@rreverser.com
3.1K followers 960 following 4.1K posts

Cloudflare Worker. D2D developer - loves building OSS tools and libraries to empower other developers. Might know me from JS, Wasm or Rust stuff. 📝 rreverser.com 📷 instagram.com/rreverser 🇺🇦 🤝 🇬🇧

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Ingvar Stepanyan @rreverser.com · 27/09/2026
Found my new sleeping bag.
Sainsbury's pop up coffin in the Halloween section, 15 quid.
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Ingvar Stepanyan @rreverser.com · 24/09/2026
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Ingvar Stepanyan @rreverser.com · 23/09/2026
You keep using that word...
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Ingvar Stepanyan @rreverser.com · 16/09/2026
If you write "WTF!!!!!!" with 6 exclamation marks, that costs 3 tokens in OpenAI: "W" + "TF" + "!!!!!!". If you add another one to get "WTF!!!!!!!", that's 4 tokens. But if you add yet another one, then "WTF!!!!!!!!" is back to only 3 tokens again! --- Thank you for coming to my TED talk.
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Ingvar Stepanyan @rreverser.com · 16/09/2026
TIL: Object.groupBy and Map.groupBy. developer.mozilla.org/en-US/docs/W...
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Ingvar Stepanyan @rreverser.com · 15/09/2026
Look at all that used water.
Fable mugs in a dishwasher
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Ingvar Stepanyan @rreverser.com · 15/09/2026
Whew
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Ingvar Stepanyan @rreverser.com · 12/09/2026
Got access to Mythos. What should I break?
Holding a bottle of Mythos.
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Ingvar Stepanyan @rreverser.com · 12/09/2026
Woot, finally. Another Chromium based browser with extension support before Chrome itself.
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Ingvar Stepanyan @rreverser.com · 12/09/2026
Ugh Claude became much much dumber in the last few days. Regular failure, new confident hallucinations, etc etc.
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Ingvar Stepanyan @rreverser.com · 11/09/2026
😰
"Review icon update" dialog:

"If this web app is trying to trick you into thinking it's a different app, uninstall it."

(they are exactly same icon)
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Ingvar Stepanyan @rreverser.com · 04/09/2026
Not an American, but it was interesting to go through. A lot of eyebrow-raising "some people pronounce it like THAT??".
Your dialect map
Redder areas talk more like you; bluer areas least.

You talk most like someone from Washington, D.C. — about 46% of your answers match a typical resident.
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Ingvar Stepanyan @rreverser.com · 04/09/2026
Nice try 👮‍♂️
Question 58 of 60
🔎
I ____ her lifeless body from the pool

dragged

drug

I use both interchangeably

other
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Ingvar Stepanyan @rreverser.com · 31/08/2026
I almost screamed.
Instagram ad: "4 Reasons to put IE on your home screen."

(account is interestingengineering)
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Ingvar Stepanyan @rreverser.com · 28/08/2026
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Ingvar Stepanyan @rreverser.com · 28/08/2026
Ironic.
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Ingvar Stepanyan @rreverser.com · 23/08/2026
Too real.
Gemini request: ​Tweet in the style of bsky user rreverser.com

Gemini:

> ​Writing WebAssembly tooling is 10% solving complex compiler problems and 90% figuring out how to pass a JavaScript string back and forth across the boundary without accidentally allocating a gigabyte of memory.
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Ingvar Stepanyan @rreverser.com · 19/08/2026
...huh
The brain is just a lossy compression algorithm. It deletes the boring bits so it can fit the interesting ones. No wonder I can't remember where I put my keys but remember a pun from 2011. We are all just running on cached garbage collection.
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Ingvar Stepanyan @rreverser.com · 16/08/2026
Went kayaking and caught dinner in the river with my bare hands. Ancestors would be proud.
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Ingvar Stepanyan @rreverser.com · 14/08/2026
👻
Affinity photo stacking checkbox: "Automatically remove ghosts"
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Ingvar Stepanyan @rreverser.com · 13/08/2026
Took me scrolling through a few images to realise this is Instagram's loading splash screen and not an actual picture of the eclipse.
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Ingvar Stepanyan @rreverser.com · 13/08/2026
Let's try some new ones...
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Ingvar Stepanyan @rreverser.com · 12/08/2026
Good night, sun! Well done today.
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Ingvar Stepanyan @rreverser.com · 12/08/2026
Who are all these people and how did they find out about my perfect spot? 😂
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Ingvar Stepanyan @rreverser.com · 12/08/2026
Fingers crossed. #eclipse
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Ingvar Stepanyan @rreverser.com · 03/08/2026
Connecting to cloud services straight at the source.
SAS airline page: enjoy free high-speed WiFi, free for EuroBonus members and customers of 3. Powered by Starlink.
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Ingvar Stepanyan @rreverser.com · 23/07/2026
Sorry.
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Ingvar Stepanyan @rreverser.com · 23/07/2026
Oh hey they moved the church. Feels weird that these pictures I took 3 years apart are also 3 kilometres apart.
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Ingvar Stepanyan @rreverser.com · 22/07/2026
Had to check if it's real, and Gemini's obnoxious rule to respond to questions with more questions makes it even funnier.
which days of the week have poop in them

Instagram bigchodeh...

Only one standard day of the week literally contains the letters p-o-o-p: Wednesday (as in, "Wednespoop").

From a health perspective, however, every day is a good day to have a poop! Medical experts consider it normal and healthy to go anywhere from three times a day to three times a week. BBC +1

Could you tell me if you are asking out of curiosity, or if you are tracking changes in your bowel habits because you are dealing with constipation or loose stools?
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Ingvar Stepanyan @rreverser.com · 19/07/2026
Lost me at large Danish
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Ingvar Stepanyan @rreverser.com · 06/07/2026
Hey, Claude, hear me out...
Windows 98 like defrag screen but with "Opus 9.8" in the title, process saying "Thinking..." and blocks showing "7% Tokens Used"
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Ingvar Stepanyan @rreverser.com · 05/07/2026
I thought I was tripping.
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Ingvar Stepanyan @rreverser.com · 04/07/2026
Ordering some dehydrated food from favourite Ukrainian brands for that taste of home during longer treks... and the promo pictures sure give me feels.
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Ingvar Stepanyan @rreverser.com · 04/07/2026
Just downloaded Snapshot, and this is perfect, exactly the read vs write view fix I had in mind. Thank you!
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Ingvar Stepanyan @rreverser.com · 01/07/2026
Someone who is good at Rust plz help, I set expect_fun_call = "allow" and I'm still not getting any fun calls :(
Clippy Lints screenshot: expect_fun_call
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Ingvar Stepanyan @rreverser.com · 28/06/2026
OH MY GOD WE FOUND WHO CLAUDE WAS TRAINED ON www.newyorker.com/culture/the-...
Excerpt from the post:

I kept saying, "You're absolutely right. It's out!" Then, when he left, I crumpled up all his notes, and I tossed it in the wastepaper basket.
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Ingvar Stepanyan @rreverser.com · 27/06/2026
What?
Free Al training for experienced software engineers

Learn by solving problems at the whiteboard and building systems, not sitting through lectures. One afternoon a week, in-person in London, fully funded.
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Ingvar Stepanyan @rreverser.com · 27/06/2026
Me: oh right, Pixel has a temperature sensor, let me check how hot is the bus seat. Pixel:
Thermometer app warning: Temperature sensor is too warm.
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Ingvar Stepanyan @rreverser.com · 26/06/2026
Nah that's already cooled down.
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Ingvar Stepanyan @rreverser.com · 26/06/2026
Should have kept the axes.
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Ingvar Stepanyan @rreverser.com · 26/06/2026
I'm surprised how well the "point fan outside the window" trick works. Never tried it before, but hard to argue with hard data - you can see the exact moment I turned it around.
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Ingvar Stepanyan @rreverser.com · 25/06/2026
Same, Shakshuka, same... 🥵
Cat lying down on IKEA boards upside down outstretched with open mouth and staring aghast into the camera.
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Ingvar Stepanyan @rreverser.com · 25/06/2026
Yeah watching those graphs meeting the wrong way around is no fun. And that's with all the windows open.
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Ingvar Stepanyan @rreverser.com · 23/06/2026
Train delays are getting out of hand.
Train app showing trains scheduled at 15:00 departing at 14:59, with delay time of 23 hours 59 minutes.
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Ingvar Stepanyan @rreverser.com · 23/06/2026
On the same note, the solution doesn't look like the obvious way to do this either - it's replicating what `class` does, and classes can be optimised even further by the engine not to mention readability benefits.
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Ingvar Stepanyan @rreverser.com · 22/06/2026
Fuckers. "You know what would make heatwave better for our neighbours? Construction dust!"
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Ingvar Stepanyan @rreverser.com · 21/06/2026
Fun fact: new IKEA KAJPLATS smart bulbs are advertised as compatible only with Matter. However, folks found that they have a secret Zigbee compatibility mode that you can enter by, I kid you not, power-cycling the lamp 6 times to reset it and then power-cycling 12 times to enter Zigbee pairing.
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Ingvar Stepanyan @rreverser.com · 18/06/2026
I get it - who doesn't have a different face at work - but why would I have different fingerprints for work??
Android lock methods menu:

Screen lock PIN

Fingerprint

2 fingerprints added

Fingerprint for work

Add fingerprint

Face

Face added

Face for work

Add face
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Ingvar Stepanyan @rreverser.com · 17/06/2026
HKTs are so good. I love how easy it is to build complex data structures generic over either Rc vs Arc, or even over &T vs &mut T vs T nowadays.
trait RefCounter {
    type Rc<T: ?Sized>;
}

struct RcRepr;
impl RefCounter for RcRepr {
    type Rc<T: ?Sized> = Rc<T>;
}

struct ArcRepr;
impl RefCounter for ArcRepr {
    type Rc<T: ?Sized> = Arc<T>;
}

// A struct that can be backed either by cheaper Rc or by multi-threaded Arc.
struct Foo<T: RefCounter> {
    a: T::Rc<str>,
    b: T::Rc<[u8]>,
}
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Ingvar Stepanyan @rreverser.com · 11/06/2026
Or, as I like to call it, Half Empty English.
Breakfast menu listing Half Full English
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