Hacker News

Pixuma: Fundamentals of Computer Science and Mathematics

Hacker News - Thu, 07/23/2026 - 9:41pm

Article URL: https://pikuma.com/

Comments URL: https://news.ycombinator.com/item?id=49030339

Points: 1

# Comments: 0

Categories: Hacker News

Lockless MPSC FIFO queues for io_uring

Hacker News - Thu, 07/23/2026 - 9:06pm

Article URL: https://lwn.net/Articles/1081871/

Comments URL: https://news.ycombinator.com/item?id=49030140

Points: 1

# Comments: 0

Categories: Hacker News

Show HN: Openleetcode – LeetCode runner where tests live in the repo

Hacker News - Thu, 07/23/2026 - 9:06pm

You write a standard solution, just like on LeetCode, and run it through the CLI. It identifies the problem by ID or title, executes your code against local test cases, and shows the result.

It currently supports around 1000 problems and multiple languages, including Python, C++, Rust, Java, Go, TypeScript, Swift, and others.

The project is still an MVP. System design, SQL, and concurrency problems are not supported yet, but support for more problem types is planned.

Made in Haskell!

Comments URL: https://news.ycombinator.com/item?id=49030138

Points: 1

# Comments: 0

Categories: Hacker News

Doom on Google Sheets

Hacker News - Thu, 07/23/2026 - 9:00pm
Categories: Hacker News

Show HN: A factory simulator game built on Spreadsheets

Hacker News - Thu, 07/23/2026 - 8:59pm

I would say this is the real factory simulator game haha

Comments URL: https://news.ycombinator.com/item?id=49030100

Points: 2

# Comments: 0

Categories: Hacker News

Show HN: Understanding Floating Point

Hacker News - Thu, 07/23/2026 - 8:59pm

I wrote an interactive introduction to IEEE-754 floating point and would love some feedback.

My main issue with existing treatments of this topic (and internet tutorials, broadly) is that they ask too little of the reader. I wanted to structure this around a sequence of questions for you to answer, using interactive widgets and optionally an LLM tutor/grader. Basically: you progress in the tutorial by demonstrating your understanding.

The feedback I'm looking for is mostly around structure. Does it help to have the LLM available? Did you engage more with this than you would have with a standard tutorial? etc.

btw using the LLM is optional, and requires a valid email address (just to limit abuse). If you decide to do it on your own, you'll still be asked the same questions, you just won't be able to go back and forth with the LLM or have your answers graded.

Comments URL: https://news.ycombinator.com/item?id=49030097

Points: 1

# Comments: 0

Categories: Hacker News

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