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Avoid UUIDv4 Primary Keys

https://andyatkinson.com/avoid-uuid-version-4-primary-keys
48•pil0u•1h ago•37 comments

Adafruit: Arduino’s Rules Are ‘Incompatible With Open Source’

https://thenewstack.io/adafruit-arduinos-rules-are-incompatible-with-open-source/
222•MilnerRoute•17h ago•115 comments

Unscii

http://viznut.fi/unscii/
126•Levitating•7h ago•6 comments

Arborium: Tree-sitter code highlighting with Native and WASM targets

https://arborium.bearcove.eu/
120•zdw•7h ago•20 comments

Roomba maker goes bankrupt, Chinese owner emerges

https://news.bloomberglaw.com/bankruptcy-law/robot-vacuum-roomba-maker-files-for-bankruptcy-after...
203•nreece•10h ago•204 comments

Ask HN: What Are You Working On? (December 2025)

291•david927•18h ago•929 comments

$5 whale listening hydrophone making workshop

https://exclav.es/2025/08/03/dinacon-2025-passive-acoustic-listening/
38•gsf_emergency_6•4d ago•12 comments

The Whole App is a Blob

https://drobinin.com/posts/the-whole-app-is-a-blob/
91•valzevul•7h ago•37 comments

John Varley has died

http://floggingbabel.blogspot.com/2025/12/john-varley-1947-2025.html
81•decimalenough•8h ago•34 comments

If AI replaces workers, should it also pay taxes?

https://english.elpais.com/technology/2025-11-30/if-ai-replaces-workers-should-it-also-pay-taxes....
144•PaulHoule•11h ago•227 comments

Common Rust Lifetime Misconceptions

https://github.com/pretzelhammer/rust-blog/blob/master/posts/common-rust-lifetime-misconceptions.md
45•CafeRacer•5h ago•7 comments

The Problem of Teaching Physics in Latin America (1963)

https://calteches.library.caltech.edu/46/2/LatinAmerica.htm
50•rramadass•14h ago•34 comments

Show HN: I wrote a book – Debugging TypeScript Applications (in beta)

https://pragprog.com/titles/aodjs/debugging-typescript-applications/
18•ozornin•6d ago•9 comments

Rob Reiner has died

https://www.hollywoodreporter.com/movies/movie-news/rob-reiner-dead-harry-met-sally-princess-brid...
105•RickJWagner•7h ago•42 comments

Running on Empty: Copper

https://thehonestsorcerer.substack.com/p/running-on-empty-copper
65•the-needful•6d ago•48 comments

Hashcards: A plain-text spaced repetition system

https://borretti.me/article/hashcards-plain-text-spaced-repetition
334•thomascountz•18h ago•149 comments

JSDoc is TypeScript

https://culi.bearblog.dev/jsdoc-is-typescript/
174•culi•15h ago•200 comments

CapROS: Capability-Based Reliable Operating System

https://www.capros.org/
85•gjvc•10h ago•33 comments

A trip through the Graphics Pipeline (2011)

https://fgiesen.wordpress.com/2011/07/09/a-trip-through-the-graphics-pipeline-2011-index/
12•kruuuder•4d ago•2 comments

AI agents are starting to eat SaaS

https://martinalderson.com/posts/ai-agents-are-starting-to-eat-saas/
143•jnord•11h ago•168 comments

The History of Xerox

https://www.abortretry.fail/p/the-history-of-xerox
25•rbanffy•3d ago•2 comments

Read Something Wonderful

https://readsomethingwonderful.com/
119•snorbleck•7h ago•19 comments

The Java Ring: A Wearable Computer (1998)

https://www.nngroup.com/articles/javaring-wearable-computer/
4•cromulent•4d ago•0 comments

Rio de Janeiro's talipot palm trees bloom for the first and only time

https://apnews.com/article/brazil-rio-talipot-palm-flamengo-park-dcfb1ce237af7a10ab72205fc9bbdc02
162•1659447091•1w ago•39 comments

Elevated errors across many models

https://status.claude.com/incidents/9g6qpr72ttbr
302•pablo24602•13h ago•141 comments

In the Beginning was the Command Line (1999)

https://web.stanford.edu/class/cs81n/command.txt
157•wseqyrku•1w ago•72 comments

An attempt to articulate Forth's practical strengths and eternal usefulness

https://im-just-lee.ing/forth-why-cb234c03.txt
68•todsacerdoti•1w ago•34 comments

Price of a bot army revealed across online platforms

https://www.cam.ac.uk/stories/price-bot-army-global-index
150•teleforce•19h ago•69 comments

Shai-Hulud compromised a dev machine and raided GitHub org access: a post-mortem

https://trigger.dev/blog/shai-hulud-postmortem
235•nkko•1d ago•147 comments

How well do you know C++ auto type deduction?

https://www.volatileint.dev/posts/auto-type-deduction-gauntlet/
60•volatileint•5d ago•47 comments
Open in hackernews

Fixrleak: Fixing Java Resource Leaks with GenAI

https://www.uber.com/blog/fixrleak-fixing-java-resource-leaks-with-genai/
17•carimura•7mo ago

Comments

stevoski•7mo ago
> “Resource leaks, where resources like files, database connections, or streams aren’t properly released after use, are a persistent issue in Java applications”

This was true maybe back in 2005. Java has had try-with-resources for a loooong time. As I see it this has been the dominant idiom for ages, for handling resources that might leak.

okr•7mo ago
People tend to forget. Stream-API is a good candidate, that people like to not consider for leakage. If you don't own your stream, if you do not definitly know, that your stream comes from a collection, then ya better close it with a try-block.
bob778•7mo ago
How much effort was spent automating this to fix 112 instances across Uber’s code base? I assume code reviews would catch any new issues so this seems like overkill for a small one-off task?
hawk_•7mo ago
Spotbugs or checkstyle etc... would catch these. What does AI add here?
xyst•7mo ago
It gives marketing team at Uber to say "wE uSe AI hErE!!1". C-levels approve since anything AI gets a nice pump.

Engineering wise. This adds nothing. It’s an absolute waste of compute and energy to run this through LLMs

sigotirandolas•7mo ago
> This analysis ensures that FixrLeak skips functions where resources are passed as parameters, returned, or stored in fields, as these resources often outlive the function’s scope.

> FixrLeak delivers precise, reliable fixes while leaving more complex cases for advanced analysis at the caller level.

In other words, this will only fix trivial leaks, which are best seen as a language design issue and can be fixed by RAII, reference counting, etc.

It won't fix the more insidious leaks like `UNBOUNDED_QUEUE.add(item)` that are more likely to pass through code review in the first place.

xyst•7mo ago
Using AI when a static scanner like SonarQube easily picks up these types of resource leaks, especially in Java.

Peak waste.

What’s next?

"Get rid of your GitHub dependabot alerts and replace it with my shitty ChatGPT wrapper”

rvz•7mo ago
> Using AI when a static scanner like SonarQube easily picks up these types of resource leaks, especially in Java.

Exactly.

It's very disappointing to see that Uber engineers would rather trust an LLM to that claims to spot these issues when a battle-tested scanner such as SonarQube would have caught this in the first place.

The LLM hype-train is almost just as bad as the JavaScript hype train in the 2010s where some of the worst technologies are used on everything.

rvz•7mo ago
Why exactly do you need LLMs for this when efficient alternatives like SonarQube or checkstyle already do this without the expensive waste LLMs create?

This adds little to no technical advantage over existing solutions what so ever for this particular use case.

yahoozoo•7mo ago
stupid af
Traubenfuchs•7mo ago
So you tell me those 200-600k software engineers that can easily solve leetcode hard are so incompetent they missed using try-with-resources at such scale, they needed to introduce new AI tooling to fix it?

Hey Uber, I am from the EU, I usually can‘t even solve leetcode medium but I will write you scalable, spotless Java for a third of the salary.

Our industry and its economics are a joke.

hello_moto•7mo ago
So you write bug-free scalable code 100% in any jobs you ever worked for?

I guess we don’t need QA and Dev/Staging environment

rad_gruchalski•7mo ago
Can the QA team? How does the dev/staging environment help writing less buggy code?
rad_gruchalski•7mo ago
But can you leetcode heh.
TYMorningCoffee•7mo ago
A lot of commenters point out that there already are many established static checkers that do this. That is not what Uber attempts here.

Uber is not proposing a static checker. They even use sonar qube in their architecture. They propose using an LLM to resolve the leak detected by sonar qube.