Hacker News Reader

0b01on Launch HN: Issen (YC F24) – Personal AI language tutor

Portuguese should have the flag of Brazil.

Don’t dim screen on iPhone during conversation.

The tutor should terminate the lesson when its goals are achieved and do a warm handoff.

Overall it’s quite good.

0b01on Show HN: Tinder, but to Decide What to Eat

For me I like to use a tournament tracker.

0b01on Show HN: Minimalist, walkie-talkie for startups

If it doesn’t have speech to text, I ain’t listening to all that

0b01on A JVM in Rust part 5 – Executing instructions

Same way to write self referential structs - use index types into the whatever arena you are using. Indexes are usually 32 bit so they are a bit faster than pointers.

If you are building one off trees such as for parsing and ast transforms, bumpalo is your friend.

In your case, you can look into generational arenas and slabs which are useful for graphs.

0b01on Ask HN: Who needs beta testers?

https://tail2.com

Continuous profiling for Linux. It uses ebpf to sample running programs and unwinds the stack, then uploads to server so you know why it look 10 seconds to process that customer’s request last Christmas. :)

Currently supports x86-64 and ARM64

Contact: feel free to join the discord on the website

0b01on Can an electric circuit do recursion?

The simplest mutual recursion is a Set-Reset flip flop circuit.

0b01on Show HN: Self-hosted CMS on serverless Cloudflare

This still makes no sense at all. Self hosting means running a program on your own machine instead of on a cloud platform such as cloudfalre.

0b01on I almost failed to search a 37 GB text file in under 1 millisecond

Have you tried DuckDB? It’s the columnar version of SQLite.

0b01on I almost failed to search a 37 GB text file in under 1 millisecond

DuckDB is also great for stuff like this. You can replace a MapReduce cluster with a single SQL.

0b01on Rewriting (and optimizing) a tree-walking interpreter in Rust

4. Cast to &'static and *. Expert Rust hacker level.

0b01on Rust stabilizes generic associated types

Here's an underrated application: allowing "view bag" types where one can register a concrete object with its type.

0b01on Repurposing the cadaver of a spider to create a pneumatically actuated gripper

"pneumatic": so basically they apply pressure by injecting air into spider's valve and it moves?

How is "necrobotics" a real field of research? :p

0b01on Show HN: I built a note taking tool that executes Python for indie hackers

Thanks for the feedback. I did a bit too much tweaking. Consider it fixed!

0b01on Show HN: RawStr Notes – The missing notebook for developers

RawStr Notes solved a personal pain point with all the cloud-based notebook currently. Hopefully this could be of use to other software developers. Please let me know what you think. Thanks!

0b01on Lang Jam: create a programming language in a weekend

More like parser jam

0b01on Microsoft confirms taskbar in Windows 11 no longer supports drag and drop

Yes I think most people right click pin in context menu on an opened application

0b01on Why aren't there more programming-language startups?

What data telemetry does vscode collect? And how would that be useful?

0b01on Diffsitter: A tree-sitter based AST difftool to get meaningful semantic diffs

You are correct. It is indeed possible to use dynamic programming. For more info check out [0]. OP’s project probably takes too long on nontrivial merges in its current state.

[0] https://thume.ca/2017/06/17/tree-diffing/

0b01on Diffsitter: A tree-sitter based AST difftool to get meaningful semantic diffs

These tools simply don’t work well on anything more complicated than S-expressions. Every time I look into this space I end up disappointed.

0b01on MS Paint IDE

That is IDE's job because images can just be embedded in markdown comments... Version controlling non-text comments seems to be an unsolved problem though.

0b01on Google open-sources the Lyra audio codec

But since the buffer size has to be 40ms then so the minimum latency is 40ms

0b01on The Mythology of Red Bull

You should try Baba Roots, also not carbonated and has a similar taste.

0b01on The Mythology of Red Bull

Little do people know Red Bull is originally a Thai energy drink: https://en.wikipedia.org/wiki/Krating_Daeng

Tastewise I also enjoy Jamaican Baba Roots: https://en.wikipedia.org/wiki/Baba_Roots

0b01on Nx: Multi-dimensional tensors Elixir lib with multi-staged compilation (CPU/GPU)

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0b01on Nx: Multi-dimensional tensors Elixir lib with multi-staged compilation (CPU/GPU)

I don't find this useful in any way since Elixir is weakly typed and a worse Lisp than Python..

0b01on A Beginner's Guide to NFTs

Remember when Martin Shkreli had that unreleased Wu Tang album? Yes he still has it.

0b01on AI maths whiz creates tough new problems for humans to solve

I agree with the article you linked. Mathematical knowledge is about compression. Most if not all of these formulae are just specializations of known formulae. So the value of this approach is questionable. Generating these forms can possibly be done in a much simpler way.

0b01on Robinhood is said to draw on bank credit lines amid tumult

To understand toxic flow you have to know adverse selection. For example, you are asked to share a pizza with your brother. You are free to split it in half however you like, and your brother gets to pick which half to take. The most fair way is to split it in half otherwise he will select adversely. Market makers job is to quote the true price of an asset by offering to buy and sell at different prices without having one side picked off more than the other. So when adverse selection occurs too often over a period of time, they will simply throw in the towel and fold, regardless of whether their opponent is bluffing or not.

In this specific case, Robinhood often have worse price than NBBO, so they get to do liquidity arbitrage in addition to the less toxic retail orderflow.

0b01on Mother's blood test predicts a sub-type of autism

Autism is a slow life history spectrum disorder. You can read more about this theory in evopsych by looking up M Del Giudice papers.

0b01on The Battle of GameStop

It's very hard to miss the most actively traded option of the day.