frontpage.
newsnewestaskshowjobs

Made with ♥ by @iamnishanth

Open Source @Github

Computer Scientists Figure Out How to Prove Lies

https://www.quantamagazine.org/computer-scientists-figure-out-how-to-prove-lies-20250709/
60•nsoonhui•2h ago•25 comments

Optimizing a Math Expression Parser in Rust

https://rpallas.xyz/math-parser/
48•serial_dev•2h ago•22 comments

Show HN: Typeform was too expensive so I built my own forms

https://www.ikiform.com/
37•preetsuthar17•2h ago•30 comments

Thunderbird 140 “Eclipse”

https://blog.thunderbird.net/2025/07/welcome-to-thunderbird-140-eclipse/
118•TangerineDream•2d ago•56 comments

MCP-B: A Protocol for AI Browser Automation

https://mcp-b.ai/
248•bustodisgusto•13h ago•126 comments

Kite – News App by Kagi

https://kite.kagi.com/
45•tigroferoce•4h ago•8 comments

Tree Borrows

https://plf.inf.ethz.ch/research/pldi25-tree-borrows.html
513•zdw•21h ago•132 comments

A Typology of Canadianisms

https://dchp.arts.ubc.ca/how-to-use
172•gnabgib•14h ago•174 comments

At last, a use case for AI agents with sky-high ROI: Stealing crypto

https://www.theregister.com/2025/07/10/ai_agents_automatically_steal_cryptocurrency/
15•rntn•48m ago•2 comments

Show HN: MCP server for searching and downloading documents from Anna's Archive

https://github.com/iosifache/annas-mcp
168•iosifache•14h ago•53 comments

Show HN: FlopperZiro – A DIY open-source Flipper Zero clone

https://github.com/lraton/FlopperZiro
292•iraton•18h ago•61 comments

The Origin of the Research University

https://asteriskmag.com/issues/10/the-origin-of-the-research-university
88•Petiver•3d ago•4 comments

Biomni: A General-Purpose Biomedical AI Agent

https://github.com/snap-stanford/Biomni
192•GavCo•16h ago•29 comments

The jank programming language

https://jank-lang.org/
334•akkad33•3d ago•92 comments

Radiocarbon dating reveals Rapa Nui not as isolated as previously thought

https://phys.org/news/2025-06-radiocarbon-dating-reveals-rapa-nui.html
11•wglb•2d ago•0 comments

Solar power has begun to transform the world’s energy system

https://www.newyorker.com/news/annals-of-a-warming-planet/46-billion-years-on-the-sun-is-having-a-moment
182•dmazin•23h ago•289 comments

A fast 3D collision detection algorithm

https://cairno.substack.com/p/improvements-to-the-separating-axis
234•OlympicMarmoto•21h ago•27 comments

Show HN: BreakerMachines – Modern Circuit Breaker for Rails with Async Support

https://github.com/seuros/breaker_machines
30•seuros•4d ago•12 comments

Show HN: Petrichor – a free, open-source, offline music player for macOS

https://github.com/kushalpandya/Petrichor
129•kushalpandya•13h ago•57 comments

Author of William the Conqueror's 'Medieval Big Data' Project Revealed

https://www.ox.ac.uk/news/2025-07-02-author-william-conqueror-s-medieval-big-data-project-revealed
5•zeristor•3d ago•0 comments

Bootstrapping a side project into a profitable seven-figure business

https://projectionlab.com/blog/we-reached-1m-arr-with-zero-funding
857•jonkuipers•2d ago•230 comments

Grok 4 Launch [video]

https://twitter.com/xai/status/1943158495588815072
231•meetpateltech•7h ago•179 comments

Code and Trust: Vibrators to Pacemakers

https://punkx.org/jackdoe/code-and-trust.html
56•jackdoe•3d ago•39 comments

Archaeologists unveil 3,500-year-old city in Peru

https://www.bbc.co.uk/news/articles/c07dmx38kyeo
160•neversaydie•3d ago•60 comments

Configuring Split Horizon DNS with Pi-Hole and Tailscale

https://www.bentasker.co.uk/posts/blog/general/configuring-pihole-to-serve-different-records-to-different-clients.html
104•gm678•18h ago•28 comments

Evaluating the Effectiveness of Memory Safety Sanitizers

https://www.computer.org/csdl/proceedings-article/sp/2025/223600a088/21TfesaEHTy
28•signa11•2d ago•9 comments

Xenharmlib: A music theory library that supports non-western harmonic systems

https://xenharmlib.readthedocs.io/en/latest/
178•retooth•1d ago•18 comments

Linda Yaccarino is leaving X

https://www.nytimes.com/2025/07/09/technology/linda-yaccarino-x-steps-down.html
467•donohoe•21h ago•809 comments

Ruby 3.4 frozen string literals: What Rails developers need to know

https://www.prateekcodes.dev/ruby-34-frozen-string-literals-rails-upgrade-guide/
232•thomas_witt•4d ago•113 comments

The most otherworldly, mysterious forms of lightning on Earth

https://www.nationalgeographic.com/science/article/lightning-sprites-transient-luminous-events-thunderstorms
106•Anon84•3d ago•37 comments
Open in hackernews

Multi-Region Row Level Security in CockroachDB

https://www.cockroachlabs.com/blog/fine-grained-access-control-row-level-security/
46•rusticwizard•14h ago

Comments

jayzalowitz•11h ago
well done!
DSingularity•10h ago
The first example demonstrating row level security contains results from the wrong tenant.
sebmellen•9h ago
Is that true? I can’t quite follow it on mobile.
rsclarke•8h ago
Yes, the example shows setting the current tenant id to all ones and then performing a select revealing a tenant id of all twos.

The same result is displayed in another example when correctly using a tenant id of all twos. A mistake perhaps of wrong output with the wording in the article is all.

rusticwizard•8h ago
Ah nice catch! This is an unfortunate copy paste error on the content on our part and we will fix it first thing tomorrow.
journal•9h ago
Doesn't same database multi-tenancy defeats the one-tenant one-database advantage of being able to easily disaster recover a single tenant or allow for easily moving a tenant and all their stuff to a dedicated box?
esseph•9h ago
At a certain scale they'd be sharded and not on a single instance anyway, right?
journal•9h ago
somewhere only in one place there will be main index with at least references to locations where to find others. at the top somewhere there is always just a flat list. this is a multi-dimensional problem. i really want to know real life scenario someone arguing for or against this. really interested to see what side people pick and where they draw the line of what it means to be multi-tenant. personally, i will never again write multi-tenant code ever again in my life. the implementation i've modeled for myself because i understood that immediate backup and restore is more important than fancy multi-tenancy.
jandrewrogers•8h ago
Even then, you do want to provide some degree of hardware-adjacent isolation to limit not just the blast radius but also computational cost of some DDL operations in a multi-tenant setup.

For example, you generally only want to have one tenant’s data per storage page. There are many famous ways that interleaving different tenants’ data at a fine-grained level can go very wrong.

sqlitor•5h ago
What happens if an attacker executes `SET app.current_tenant` a second time on the existing connection (e.g. through SQL injection)?