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Show HN: HackerBooks – HackerTube, but for books mentioned on HN

https://hackerbooks.org
782•roansh•7h ago•162 comments

HackerTube: YouTube built from videos recommended by HN

https://karpathy.bearblog.dev/hacker-tube/
2186•karpathy•1d ago•530 comments

Nibnib: Image compression with extreme decompression speed

https://github.com/raphlinus/nibnib
70•raphlinus•2d ago•7 comments

Tips for more effective fuzz testing with AFL++

https://nullprogram.com/blog/2025/02/05/
59•luu•4d ago•7 comments

Ask HN: Which TV do you recommend for privacy?

73•LecroJS•3h ago•133 comments

Copper – A minimal low-level programming language with OOP and generics

https://tibleiz.net/copper/
116•bogdanoff_2•2d ago•70 comments

Mathematics has changed. Let's act like it

https://terrytao.wordpress.com/2026/11/01/mathematics-has-changed-lets-act-like-it/
188•smilelamp•5h ago•199 comments

Show HN: OmniDiff – Opensource, super fast, content aware Git difftool, in Rust

https://github.com/ivankovic/omnidiff
130•FabCH•10h ago•37 comments

New 3D thermal invisibility cloak makes objects disappear from infrared cameras

https://www.sciencedaily.com/releases/2026/10/261025073051.htm
23•stevenalowe•2d ago•11 comments

AI delivers 'zero financial payoff' to most companies, Apollo economist says

https://techcrunch.com/2026/10/25/ai-delivers-zero-financial-payoff-to-most-companies-according-t...
25•throwoutway•1h ago•11 comments

Proving and improving the Platonic Representation Hypothesis with JEPAs

https://arxiv.org/abs/2610.39302
99•Anon84•10h ago•55 comments

The She-Wolves of Jülich

https://www.historytoday.com/archive/history-matters/she-wolves-julich
5•Thevet•1d ago•0 comments

Lenovo's 'encrypted' fingerprint USB is just an unencrypted SD card in a case

https://www.reddit.com/r/technology/comments/1xl2pr3/lenovos_encrypted_fingerprint_usb_drive_is_j...
359•entryleveljobsc•8h ago•124 comments

Bidirectional charging during grid outages

https://www.jefftk.com/p/bidirectional-charging-during-grid-outages
79•luu•1d ago•116 comments

Brazilian Court Sanctions Lawyers for Prompt Injection in Court Filing

https://jetstream.security/insights/brazilian-court-sanctions-prompt-injection-filing/
313•doodlesdev•21h ago•195 comments

Novellas with Groff

https://movq.de/blog/postings/2026-10-31/0/POSTING-en.html
104•dverlaeckt80•9h ago•46 comments

So I guess everyone uses LLMs to think now

https://eva.ac/blog/llms/
44•xyzeva•1h ago•41 comments

Seoul Viosys begins production of rare-earth-free white light emitter

https://www.semiconductor-today.com/news_items/2026/oct/seoul-291026.shtml
125•gmays•7h ago•31 comments

One-minute frequency disturbances from synchronization in power systems

https://www.nature.com/articles/s41560-026-02144-0
110•croes•1d ago•39 comments

The AI cost of JavaScript frameworks

https://nolanlawson.com/2026/10/28/the-ai-cost-of-javascript-frameworks/
275•luu•17h ago•216 comments

Parchment Paper History: How We Got Paper Perfect for Baking (2019)

https://tedium.co/2019/11/21/nonstick-parchment-paper-history/
30•colinprince•1d ago•13 comments

Radiation Map of the World

https://radiaverse.com/
118•slater•4d ago•35 comments

Show HN: I rebuilt my old canvas 3D library as a small WebGL 2 library – phoria2

https://kevs3d.co.uk/phoria2/
69•kevs3d•1d ago•10 comments

John Leeson (the voice of K9) has died

https://www.doctorwhonews.net/2026/11/john_leeson_1943_2026.html
27•slyrus•2h ago•1 comments

Show HN: Point your camera at a landscape to learn about its geology

https://outcrop.rocks/
141•headsupernova•3d ago•36 comments

Frontier Airlines Likely Breached

https://www.reddit.com/r/frontierairlines/comments/1xl20e8/psa_email_scam/
156•999900000999•6h ago•52 comments

Domain hacks with unusual Unicode characters (2018)

https://shkspr.mobi/blog/2018/11/domain-hacks-with-unusual-unicode-characters/
50•n_plus_1_acc•12h ago•47 comments

Patrick Stewart taught us what good men do with power

https://www.vox.com/politics/508526/patrick-stewart-jean-luc-picard-star-trek-liberalism
328•rhaynes•6h ago•237 comments

Landline phones will switch off across Britland in 100 days, no extensions

https://www.theregister.com/networks/2026/11/01/landline-phones-will-switch-off-across-britland-i...
114•edward•7h ago•88 comments

U.S. workers took home their smallest share of capital since at least 1947

https://fortune.com/article/why-did-us-workers-just-take-home-smallest-share-of-capital-since-194...
4•qlte•11m ago•0 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•1y ago

Comments

stevoski•1y 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•1y 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•1y 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_•1y ago
Spotbugs or checkstyle etc... would catch these. What does AI add here?
xyst•1y 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•1y 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•1y 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•1y 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•1y 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•1y ago
stupid af
Traubenfuchs•1y 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•1y 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•1y ago
Can the QA team? How does the dev/staging environment help writing less buggy code?
rad_gruchalski•1y ago
But can you leetcode heh.
TYMorningCoffee•1y 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.