top 20 hacker news stories for 2025-09-21

Quicksort explained IKEA-style

https://idea-instructions.com/quick-sort/

1 year ago

They Thought They Were Free (1955)

https://press.uchicago.edu/Misc/Chicago/511928.html

1 year ago

Sj.h: A tiny little JSON parsing library in ~150 lines of C99

https://github.com/rxi/sj.h

1 year ago

AI was supposed to help juniors shine. Why does it mostly make seniors stronger?

https://elma.dev/notes/ai-makes-seniors-stronger/

1 year ago

Meta exposé author faces $50k fine per breach of non-disparagement agreement

https://www.theguardian.com/technology/2025/sep/21/meta-expose-author-sarah-wynn-williams-faces-bankruptcy-after-ban-on-criticising-company

1 year ago

Amazon to end commingling after years of complaints from brands and sellers

https://www.modernretail.co/operations/amazon-to-end-commingling-program-after-years-of-complaints-from-brands-and-sellers/

1 year ago

LaLiga's Anti-Piracy Crackdown Triggers Widespread Internet Disruptions in Spain

https://reclaimthenet.org/laligas-anti-piracy-crackdown-triggers-widespread-internet-disruptions

1 year ago

iFixit iPhone Air teardown

https://www.ifixit.com/News/113171/iphone-air-teardown

1 year ago

Spectral Labs releases SGS-1: the first generative model for structured CAD

https://www.spectrallabs.ai/research/SGS-1

1 year ago

DXGI debugging: Microsoft put me on a list

https://slugcat.systems/post/25-09-21-dxgi-debugging-microsoft-put-me-on-a-list/

1 year ago

Oxford loses top 3 university ranking in the UK

https://hotminute.co.uk/2025/09/19/oxford-loses-top-3-university-ranking-for-the-first-time/

1 year ago

I forced myself to spend a week in Instagram instead of Xcode

https://www.pixelpusher.club/p/i-forced-myself-to-spend-a-week-in

1 year ago

Why your outdoorsy friend suddenly has a gummy bear power bank

https://www.theverge.com/tech/781387/backpacking-ultralight-haribo-power-bank

1 year ago

The Beginner's Textbook for Fully Homomorphic Encryption

https://arxiv.org/abs/2503.05136

1 year ago

Vibe coding cleanup as a service

https://donado.co/en/articles/2025-09-16-vibe-coding-cleanup-as-a-service/

1 year ago

UK, Canada and Australia formally recognise Palestinian state

https://www.theguardian.com/politics/live/2025/sep/21/keir-starmer-palestine-recognition-announcement-gaza-uk-politics-live

1 year ago

How can I influence others without manipulating them?

https://andiroberts.com/leadership-questions/how-to-influence-others-without-manipulating

1 year ago

Why is Venus hell and Earth an Eden?

https://www.quantamagazine.org/why-is-venus-hell-and-earth-an-eden-20250915/

1 year ago

Apple Silicon GPU Support in Mojo

https://forum.modular.com/t/apple-silicon-gpu-support-in-mojo/2295

1 year ago

Unified Line and Paragraph Detection by Graph Convolutional Networks (2022)

https://arxiv.org/abs/2203.09638

1 year ago