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DoorDash unveils Dot, its autonomous robot built to deliver your food

techcrunch.com Maxwell Zeff 2025-10-01 04:00:00

On Tuesday, DoorDash unveiled Dot, a small robot it built in-house that can autonomously drive on roads, bike lanes, and sidewalks to deliver food and small packages at speeds up to 20 miles per hour. Dot is designed to look friendly and even cartoonish — painted bright red, with big LED eyes and a mouth that swings open to reveal where it holds your food — though I’d argue it’s slightly creepy. DoorDash says it’s already testing the robot with early access partners in the Phoenix metropolitan

Topics: delivery doordash dot rege says

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Show HN: Regolith – Regex library that prevents ReDoS CVEs in TypeScript

news.ycombinator.com Unknown 2025-11-29 10:54:07

Regolith A server-side TypeScript and JavaScript library immune to Regular Expression Denial of Service (ReDoS) attacks by using Rust and linear Regex under the hood. Regolith has a linear worst case time complexity, compared to the default RegExp found in TypeScript and JavaScript, which has an exponential worst case. Motivation: I wanted a Regex library for TypeScript and JavaScript where I didn't have to worry about ReDoS attacks. Important Regolith is still early in development! We need h

Topics: library redos regex regolith rust

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The /o in Ruby regex stands for "oh the humanity "

news.ycombinator.com Jp Camara 2026-01-14 00:37:51

Your code using the /o modifier Source: wikipedia Hi there! Do you like Regex? Do you like performance? Do you like creating confounding bugs for yourself rooted in the mechanics of the Ruby VM itself? If you said yes to all of the above, have I got a feature for you! But first, let’s start with a story. The cliffs of insanity I was recently reviewing some code, and part of the functionality was about matching. A class took an array of strings, and you could call a method to see if an input

Topics: code end regex ruby run

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Coverage.py Regex Pragmas

news.ycombinator.com Unknown 2026-01-24 16:30:47

Coverage.py uses regexes to define pragma syntax. This is surprisingly powerful. Coverage.py lets you indicate code to exclude from measurement by adding comments to your Python files. But coverage implements them differently than other similar tools. Rather than having fixed syntax for these comments, they are defined using regexes that you can change or add to. This has been surprisingly powerful. The basic behavior: coverage finds lines in your source files that match the regexes. These lin

Topics: def file line match regexes

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Adding lookbehinds to rust-lang/regex

news.ycombinator.com Robin Hänni 2026-02-20 05:37:15

In a previous blogpost, Erik wrote about how he implemented the linear time matching algorithm from [RegElk+PLDI24] in the popular regex engine RE2. In this one, we're looking at how to do the same thing for the official regex engine from the Rust language. Namely, we add support for unbounded captureless lookbehinds. First, let's discover the newly supported feature and its limitations. Lookbehinds allow regexes to make assertions about things preceding some part of the regex pattern without c

Topics: engine lookbehind lookbehinds match regex

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More than 1 in 5 Show HN posts are now AI-related, get > half the votes/comments

news.ycombinator.com Unknown 2026-03-06 18:35:04

More than 1 in 5 Show HN posts are now AI-related, but get less than half the votes or comments. _ The idea for this article didn't exist in my brain before this morning. But there I was, scrolling the New page and even more tired of all the AI-related Show HN posts than usual. I was confident that their numbers were multiplying and wanted proof. Exactly how much more AI crap is on my lawn compared to last year? Full disclosure: I'm not a data guy. Everything below was off the top of my head. N

Topics: ai hn posts regexp_contains year

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Changing one gene can restore some tissue regeneration to mice

arstechnica.com Unknown 2026-03-23 06:09:26

Regeneration is a trick many animals, including lizards, starfish, and octopuses, have mastered. Axolotls, a salamander species originating in Mexico, can regrow pretty much everything from severed limbs, through eyes and parts of brain, to the spinal cord. Mammals, though, have mostly lost this ability somewhere along their evolutionary path. Regeneration persisted, in a limited number of tissues, in just a few mammalian species like rabbits or goats. “We were trying to learn how certain anima

Topics: mice rabbits regenerating regeneration wang

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Christopher Eccleston’s ‘Doctor Who’ Regeneration Remains One of the Show’s Best

gizmodo.com James Whitbrook 2026-04-05 02:00:53

Twenty years ago this week, the first season of the revived era of Doctor Who came to an end with “The Parting of the Ways,” as did the tenure of Christopher Eccleston’s Ninth Doctor. Ready to sacrifice it all to stop the Daleks, the Ninth Doctor’s final moments remain a vital moment in Doctor Who history. It was the first time in decades since Doctor Who had asked its audience to trust in the magic of the series’ defining trick to survival and re-invention: the magic of regeneration itself. Ec

Topics: doctor final ninth regeneration series

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Scientists Discover the Key to Axolotls’ Ability to Regenerate Limbs

wired.com Anna Lagos 2026-04-10 06:00:00

The axolotl seems like something out of science fiction. This perpetually youthful-looking Mexican salamander possesses a superpower that defies biology as we know it: the ability to regenerate entire limbs, parts of its heart, and even its spinal cord. But how does an amputated limb know whether to regenerate an entire arm from the shoulder down or just a hand from the wrist? This mystery of “positional identity” has fascinated scientists for decades. A team at Northeastern University, led by

Topics: axolotls know lab monaghan regenerate

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23andMe founder Anne Wojcicki will regain control of embattled DNA company after all

engadget.com Unknown 2026-04-12 18:45:34

In a surprise twist, 23andMe founder and former CEO Anne Wojcicki is set to regain control of the DNA company's assets, according to a press release from 23andMe. In May, a company called Regeneron bought 23andMe for $256 million in a bankruptcy auction, but Wojcicki's nonprofit, TTAM Research Institute, was able to reopen bidding with an "unsolicited offer" of $305 million, The Wall Street Journal reports. A bankruptcy judge agreed to reopen bidding on 23andMe under the condition that Regenero

Topics: 23andme company data regeneron wojcicki

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The fastest way to detect a vowel in a string

news.ycombinator.com Austin Z. Henley 2026-04-13 06:04:07

Austin Z. Henley Associate Teaching Professor Carnegie Mellon University [email protected] @austinzhenley github/AZHenley The fastest way to detect a vowel in a string 6/13/2025 I was nerdsniped recently: What is the best way to detect if a string has a vowel in it? This is trivial, right? But as I started getting into it, I realized there is much more to this. I challenged myself to come up with as many ways to detect a vowel as possible. I even asked a few friends to give it a go. Whi

Topics: length method regex return string

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Congress Demands Answers on Data Privacy Ahead of 23andMe Sale

wired.com Emily Mullin 2026-04-15 22:08:34

US Reps. Alexandria Ocasio-Cortez and Jan Schakowsky on Thursday sent letters to the two potential buyers of troubled genetic testing firm 23andMe demanding details about consumer data privacy should either of them acquire the company. Signed by 20 other Democratic members of Congress, the letters were sent to Regeneron Pharmaceuticals and TTAM Research Institute, which have put forth separate bids to buy 23andMe. In the letters, they ask Regeneron and TTAM if they will continue to give custome

Topics: 23andme company data genetic regeneron

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Latest Tech News

DoorDash unveils Dot, its autonomous robot built to deliver your food

Show HN: Regolith – Regex library that prevents ReDoS CVEs in TypeScript

The /o in Ruby regex stands for "oh the humanity "

Coverage.py Regex Pragmas

Adding lookbehinds to rust-lang/regex

More than 1 in 5 Show HN posts are now AI-related, get > half the votes/comments

Changing one gene can restore some tissue regeneration to mice

Christopher Eccleston’s ‘Doctor Who’ Regeneration Remains One of the Show’s Best

Scientists Discover the Key to Axolotls’ Ability to Regenerate Limbs

23andMe founder Anne Wojcicki will regain control of embattled DNA company after all

The fastest way to detect a vowel in a string

Congress Demands Answers on Data Privacy Ahead of 23andMe Sale

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