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Functional Quadtrees

https://lbjgruppen.com/en/posts/functional-quadtree-clojure
18•lbj•1h ago

Comments

Waterluvian•24m ago
I love the visualization, which gave me an idea: what if we numbered every "Looking at" step in the visualization? Then it's obvious just how many search steps it takes.

And then maybe even juxtapose that with a linear search example, which also numbers every step. I bet this would make it really click for some people. And for free the user can also play with how a linear search can sometimes be faster when they just want the first element!

As a bonus: allow the user to change the cell count so they can really feel just how each method scales!

OisinMoran•16m ago
Neat! Weirdly sending this article from my phone (Pixel 8) to my browser (Arc) via Pushbullet resulted in an incredibly strange bug that it loads this site instead:

https://www.lindelystables.dk/en/posts/functional-quadtree-c...

Got very confused! I challenge the HN hivemind to figure out what's going on.

mutkach•6m ago
I remember Arc randomly rewriting my bookmarks using some kind of summarization model or something like that, it also sometimes changed the name of downloaded files reinterpreting their names. Maybe it is related somehow.

Well, I guess it was the first AI-first browser, hence all this bs. I uninstalled it months ago...

runemadsen•9m ago
We just did a whole visual identity around the quadtree concept. Take a scroll on this one! https://trace.systems/
wiz21c•8m ago
I think it is weird to have two cells divided downto their smallest size when my cursor clearly occupies only one of them, not two.

I turned my Airbnb listing AI analyzer into a public leaderboard

https://shortrentals.ai/listings/directory
1•samirt•33s ago•1 comments

Redis's Homegrown JSON Parser

https://github.com/redis/redis/pull/13959
1•tuananh•1m ago•0 comments

Rearrangement in a Catalyst Improves Selectivity in Dehydrogenation of Propane

https://pubs.acs.org/doi/10.1021/jacs.5c13571
1•PaulHoule•4m ago•0 comments

Type-Safe Python for TypeScript Developers

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https://www.theregister.com/2025/12/03/us_150m_xlight/
1•alecco•6m ago•0 comments

Meta's Child Sex-Trafficking Problem

https://www.afterbabel.com/p/metas-child-sex-trafficking-problem
2•Desafinado•6m ago•1 comments

Sam Altman Has Explored Deal to Build Competitor to Elon Musk's SpaceX

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1•perihelions•6m ago•1 comments

Ask HN: Glasses with lights that flash whenever they detect cigarette smoke?

1•amichail•7m ago•0 comments

Easy Trap

https://stackdiver.com/posts/easy-trap/
2•stackdiver•10m ago•1 comments

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https://typmo.com/
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2•elliot_a•11m ago•1 comments

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2•bensouthwood•15m ago•0 comments

Meta's Wearables Device Access Toolkit: Dev Preview Available Now

https://developers.meta.com/blog/introducing-meta-wearables-device-access-toolkit/
1•lisajaloza•16m ago•1 comments

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An Abstract Arsenal: Future Tokens in Claude Skills

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1•xmorse•24m ago•0 comments

AI/ML Security Resources?

1•nidme25•24m ago•0 comments

Wan 2.6 – AI video generator with native lip-sync and audio-visual alignment

https://komiko.app/image-animation-generator/wan-26
1•reabsorb•26m ago•0 comments

Take control of your data: How Safebox makes self-hosting easier

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1•drebora•28m ago•0 comments

We tested Europe's luxurious new 'business-class' sleeper bus

https://www.theguardian.com/travel/2025/dec/04/new-luxury-sleeper-bus-service-europe-twiliner-ams...
2•robin_reala•30m ago•0 comments

Department of Defense Law of War Manual [pdf]

https://media.defense.gov/2023/Jul/31/2003271432/-1/-1/0/DOD-LAW-OF-WAR-MANUAL-JUNE-2015-UPDATED-...
2•reaperducer•31m ago•0 comments