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Erik Olsson
8.1K posts
Erik Olsson
@valross2
People connoisseur. Sometimes writing Swift, Go and other things.
Beigetreten Temmuz 2009
1.4K Folgt47.9K Follower
All apps eventually converge into a 3d ASCII Sputnik + the 65° orbital inclination
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@patrickc This is correct, but you’re not alone. The large majority have never learned to tie their shoes properly. The proper way should be taught in schools or something 😂 instant life improvement
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There are two ways of tying a standard shoelace knot, based on the relative handedness of the two half-knots, and the correct one basically never comes undone. I assume everyone else knows this and has been gently pitying me as I ignominiously retie my flailing laces, but sharing here just in case.
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@steipete Depending on how advanced your markdown rendering needs to be (unless it needs tables, embedded images etc?) one good solution IMO is to use swift-markdown and construct attributed strings yourself. It’s not too much code and is easy to grasp and gives full control
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Totally not me spending 2h on trying to figure out how to reliably render markdown in SwiftUI. Why is everything so broken in Apple’s ecosystem?
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Ok, starting 2026 early.
I'll start posting:
→ Path to fitness
→ Behind the scenes of @polar_sh
x.com/birk/status/19…
Birk Jernström@birk
Startups are bad for my health. 2018: Sold Tictail to Shopify. 2022: Started new startup. Time to turn this around 💪🏼
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Every once in a while gpt-5 gets confused and mixes thinking with real calls, and it's internal un-summarized thought process is WEIRD.
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Tool/MCP for concatenating entire repos into markdown: github.com/erikolsson/rep…
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@krzyzanowskim I think swift would be pretty great if it had working code completion. SwiftUI is another story..
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the number 1 reason why the number of not "native" apps submitted to Apple AppStore is dropping is:
1. Swift is too hard for apps, and only gets harder to start with
2. SwiftUI is DX is a failure
3. SwiftPM make dependencies harder than it should be (and is broken)
4. Xcode
did I get the list right, or did I forget about something
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@ID_AA_Carmack There are so many things I spent a lot of time learning about in uni that I never use because of abstractions - but I still find it useful to have an idea of what’s going on under the hood
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I thought I had good reason to code up a vectorized binary search, which was kind of fun to do, but then I checked, and the standard torch.searchsorted() works well enough.
For all the emphasis given in computer science curriculums and job interviews, actually implementing classic algorithms is a rare event.
If I had to, there was ample opportunity to specialize with fixed power of two sizes, but using existing functions is usually the right call.
Adding a new dependency versus your own implementation can be a harder call.
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Erik Olsson retweetet
Really excited to launch Project Europe!!!
We have brought together 125 of Europe's best founders, including @tobi and @klarnaseb, to back and mentor the next wave of generational entrepreneurs coming from Europe.
Europe has always built—and will continue to build—iconic companies.
But we are now at a fork in the road, and we need to think bigger—drawing inspiration from both past and present success stories to create the next generation of global category winners.
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rewrite Swift compiler in Go for 10x faster performance
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@florianpeninon @jtaby Yes, it’s just fundamentally broken for anything that’s not a toy app
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The worst part of Swift is when you get a compiler error on a line that has nothing to do with the actual error in your code. It reaches nuclear levels of frustration when the error is simply “the compiler is unable to type-check this expression in a reasonable time”
These ergonomics in the language don’t come for free.
Point-Free@pointfreeco
Modern Swift has a lot of advanced features, and you don’t need to know them all to be effective with the language, but when you can, the results can be magical.
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@simonbs A cord connected to an outlet that you can pull out and plug back in to turn them on/off
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Maybe, just maybe, I can squeeze one more feature into Festivitas before Christmas. What should it be? Snow, perhaps? ❄️ Any suggestions? 🤔
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Papaya is just sad. The only reason people buy it is because it kind of looks like mango (the king of fruits)
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Behind the scenes of how we let you set a precise temperature on the TOP of the pan using active temperature sensing technology.
We train our models from the top surface!
Sam D'Amico@sdamico
We’re cooking — and I genuinely think we made something super special @ImpulseLabs_
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@levelsio Check out quadtrees if you want something dead simple that doesn’t require any plugins, just an extra column
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I love how the solution is always much easier
I tried SQLite Spatial Lite extension and I couldn't even get it working, it also flooded my DB with ugly tables
Then someone suggested Haversine formula which actually makes it much slower!
The solution was simply removing decimals from the latitude_min and max and longitude_min and max so the query becomes LESS precise and easier and thus faster for SQLite to run
Simple solutions win!
@levelsio@levelsio
Ok of course I took the site down with this tweet 😂 Told you it was alpha verison The SQL that makes Hotel List slow now is this: latitude>latitude_min AND latitude>latitude_max AND longitude>longitude_min AND longitude>longitude_max SQLite is generally highly performant but this stuff makes it trip up a bit Should I install some SQLite geo extension that searches this faster? I don't wanna SQL by city='lisbon-portugal' because I want people to be able to move around the map and set radius of search etc. Thanks!
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@groue @jazzychad Able to use GRDB just fine from all kinds of extensions. No issues. Thx for a great framework
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@jazzychad I should remove this paragraph from the documentation. I built several modularized apps without any issue. Maybe the Xcode bug no longer exist, or has moved (a few people are still discussing in the linked issue).
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Lots of people recommending GRDB but this seems like a showstopper issue for building modern apps, which rely more and more on having extensions for system integration…?
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Erik Olsson retweetet
