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Functional Quadtrees

https://lbjgruppen.com/en/posts/functional-quadtree-clojure
17•lbj•55m ago

Comments

Waterluvian•19m 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•11m 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.

runemadsen•3m ago
We just did a whole visual identity around the quadtree concept. Take a scroll on this one! https://trace.systems/
wiz21c•2m 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.

It’s time to free JavaScript

https://javascript.tm/letter
273•pavelai•5h ago•136 comments

Functional Quadtrees

https://lbjgruppen.com/en/posts/functional-quadtree-clojure
17•lbj•55m ago•5 comments

I ignore the spotlight as a staff engineer

https://lalitm.com/software-engineering-outside-the-spotlight/
96•todsacerdoti•2h ago•20 comments

Transparent Leadership Beats Servant Leadership

https://entropicthoughts.com/transparent-leadership-beats-servant-leadership
9•ibobev•34m ago•0 comments

PGlite – Embeddable Postgres

https://pglite.dev/
238•dsego•3h ago•56 comments

RAM is so expensive, Samsung won't even sell it to Samsung

https://www.pcworld.com/article/2998935/ram-is-so-expensive-samsung-wont-even-sell-it-to-samsung....
42•sethops1•54m ago•18 comments

Ghostty is now non-profit

https://mitchellh.com/writing/ghostty-non-profit
1196•vrnvu•19h ago•256 comments

Show HN: Walrus – a Kafka alternative written in Rust

https://github.com/nubskr/walrus
59•janicerk•2d ago•18 comments

Unreal Tournament 2004 is back

https://old.reddit.com/r/unrealtournament/comments/1pdbe69/breaking_unreal_tournament_2004_is_back/
192•keithoffer•4h ago•73 comments

Show HN: MTXT – Music Text Format

https://github.com/Daninet/mtxt
25•daninet•4d ago•7 comments

Human hair grows through 'pulling' not pushing, study shows

https://phys.org/news/2025-12-human-hair.html
18•pseudolus•51m ago•0 comments

Building optimistic UI in Rails (and learn custom elements)

https://railsdesigner.com/custom-elements/
22•amalinovic•3h ago•2 comments

The Age-Gated Internet Is Sweeping the US. Activists Are Fighting Back

https://www.wired.com/story/age-verification-is-sweeping-the-us-activists-are-fighting-back/
16•geox•39m ago•0 comments

Micron Announces Exit from Crucial Consumer Business

https://investors.micron.com/news-releases/news-release-details/micron-announces-exit-crucial-con...
640•simlevesque•20h ago•319 comments

Average DRAM price in USD over last 18 months

https://pcpartpicker.com/trends/price/memory/
392•zekrioca•14h ago•278 comments

Elites could shape mass preferences as AI reduces persuasion costs

https://arxiv.org/abs/2512.04047
280•50kIters•5h ago•291 comments

Uncloud - Tool for deploying containerised apps across servers without k8s

https://uncloud.run/
197•rgun•8h ago•93 comments

Interop and MathML Core

https://conflor.es/blog/2025-11-27-interop-and-mathml/
20•todsacerdoti•3d ago•2 comments

A lost Amazon world just reappeared in Bolivia

https://www.sciencedaily.com/releases/2025/11/251130205421.htm
3•ashishgupta2209•3d ago•1 comments

Saturn (YC S24) Is Hiring Senior AI Engineer

https://www.ycombinator.com/companies/saturn/jobs/R9s9o5f-senior-ai-engineer
1•etticat•7h ago

30 years ago today "Netscape and Sun announce JavaScript"

https://web.archive.org/web/20070916144913/http://wp.netscape.com/newsref/pr/newsrelease67.html
58•donohoe•2h ago•15 comments

1D Conway's Life glider found, 3.7B cells long

https://conwaylife.com/forums/viewtopic.php?&p=222136#p222136
474•nooks•20h ago•172 comments

Programming peaked

https://functional.computer/blog/programming-peaked
83•Antibabelic•4h ago•74 comments

Valve reveals it’s the architect behind a push to bring Windows games to Arm

https://www.theverge.com/report/820656/valve-interview-arm-gaming-steamos-pierre-loup-griffais
845•evolve2k•1d ago•730 comments

Show HN: I built a dashboard to compare mortgage rates across 120 credit unions

https://finfam.app/blog/credit-union-mortgages
290•mhashemi•17h ago•95 comments

All the Way Down

https://www.futilitycloset.com/2025/11/17/all-the-way-down-2/
38•surprisetalk•5d ago•13 comments

Why WinQuake exists and how it works

https://fabiensanglard.net/winquake/index.html
114•wicket•12h ago•15 comments

Kea DHCP: Modern, open source DHCPv4 and DHCPv6 server

https://www.isc.org/kea/
105•doener•14h ago•32 comments

Shrinking Elephants: Managing large projects with Gradle

https://engineering.block.xyz/blog/shrinking-elephants
3•rileymichael•5d ago•0 comments

Reverse engineering a $1B Legal AI tool exposed 100k+ confidential files

https://alexschapiro.com/security/vulnerability/2025/12/02/filevine-api-100k
738•bearsyankees•20h ago•254 comments