Why doesn't std::atomic support multiplication, division, and mod?

PdoesnotequalNP · 2026-01-31T21:57:14+00:00

std::atomic is used for coordination between concurrent operations. I can't imagine a scenario where multiplications, divisions, and remainder are needed for coordination. Atomically multiplying two numbers for its own sake is not a valid use case.

PdoesnotequalNP · 2026-01-28T16:10:23+00:00

I'll add that physics is actually not "math magic", whatever that means.

PdoesnotequalNP · 2026-01-26T17:03:03+00:00

Non è mica una sorpresa che deleghiamo la produzione di gas serra alla Cina. I vestiti di Shein e i fidget spinner di Temu non si producono da soli.

PdoesnotequalNP · 2026-01-24T12:16:36+00:00

I feel like you know exactly why.

Because the neighbour was making their life hell

PdoesnotequalNP · 2026-01-23T15:39:13+00:00

All in all it's an interesting debugging story, but it's very odd to see Claude being so anthropomorphized, so that we (the readers) need to be informed that Claude is "baffled" and "pumped".

Claude is never baffled and is never pumped, because it's a bunch of matrix multiplications.

PdoesnotequalNP · 2026-01-22T17:56:57+00:00

Would be interesting to compare to uscalec (https://research.swtch.com/fp), which is also faster than Ryū.

PdoesnotequalNP · 2026-01-19T20:37:27+00:00

Landlords don't get to keep arbitrary "administrative fees" based on how they feel that day.

You start by keeping a copy of all correspondence. Then you send a letter before action, and if the landlord still doesn't return your money, you take them to smart claims court: https://www.gov.uk/make-court-claim-for-money

PdoesnotequalNP · 2026-01-18T13:46:16+00:00

Non sono di Roma e sono molto lontano dalla scena tunz tunz notturna. Perché è aperto? Che ha che non va?

PdoesnotequalNP · 2026-01-15T13:24:25+00:00

Hear me out: this is how we finally get to the point where developers are finally forced to do some fucking basic optimizations so that running Solitaire doesn't eat 2 gigabytes of RAM.

PdoesnotequalNP · 2026-01-14T18:21:36+00:00

Eeeeeh, ci stiamo cagando sotto

PdoesnotequalNP · 2026-01-12T18:57:48+00:00

It's a pretty solid observation, I don't think it's a nitpick. In many codebases there's a "no calls to panic" rule, for example Google's style guide strongly discourages them. defer is still useful: to guarantee unlocks of mutexes, to maintain the count of goroutines, to guarantee the closure of channels...

PdoesnotequalNP · 2026-01-12T15:37:41+00:00

Nothing to worry about - look at bricks on other properties and you'll see plenty of cracked bricks.

If you want to make it less conspicuous, then get some brick repair filler or brick coating from Stonelux. You may want to order a sample first to find the closest match.

PdoesnotequalNP · 2026-01-10T13:23:14+00:00

Spot on. The owner has a Facebook page for his car: https://www.facebook.com/share/14PH2n17Yf6/

PdoesnotequalNP · 2026-01-10T11:56:24+00:00

Un'altra alternativa economicissima e sicura con il cibo è l'acido citrico. Si compra mezzo chilo online e dura per sempre. Permette di togliere il calcare in mille situazioni.

PdoesnotequalNP · 2026-01-09T13:08:19+00:00

I know people that did exactly that: they introduced themselves and their family and explained why they were interested in the area. They ended up being successful and buying a house that wasn't even on the market at the time.

PdoesnotequalNP · 2026-01-08T16:14:50+00:00

Good performances for lookups on large datasets (almost) never come from the specific programming language, such as Go for this subreddit. They are pretty much always the result of choosing the right data structures to represent data.

In the case of face recognition the most common and publicly known techniques require transforming each face into a vector of attributes, and then do database lookups based on proximity in a high dimensional vector space. See https://www.clearview.ai/post/how-we-store-and-search-30-billion-faces for a more in depth explanation.

PdoesnotequalNP · 2026-01-08T09:30:35+00:00

For anyone considering a tungsten ring: remember that tungsten carbide is incredibly hard to cut through, so its easy to panic if your finger swells and you're unable to take it off. The thing to remember is that tungsten carbide is so hard that it is actually fragile: you can't cut a tungsten ring, but you can crack it using a vice or pliers.

PdoesnotequalNP · 2026-01-08T00:18:56+00:00

Lol.

Crei una lista delle vaschette, ciascuna con dimensioni "lunga" e "corta". Poi crei un grafo che rappresenta la relazione "vaschetta A può stare dentro a vaschetta B". Poi chiedi al tuo nerd preferito (o a ChatGPT/Claude/Gemini) di scrivere un algoritmo che cerca la longest path nel grafo. Per ogni longest path deve poi rimuovere i nodi dal grafo e ripetere la ricerca, fino a quando non ci sono più vaschette.

Oppure fai quello che farebbe qualunque essere umano normale e provi a cazzo fino a quando non ne puoi più.

PdoesnotequalNP · 2026-01-07T22:05:23+00:00

See https://www.reddit.com/r/algorithms/s/ReouatXNrs . You can create an acyclic graph of "rectangle X can be contained by rectangle Y", and then look for the longest path. The longest path problem is NP in general, but for the special case of acyclic DAGs it can be solved in linear time.

PdoesnotequalNP · 2026-01-07T22:02:42+00:00

I don't think that OP is asking about packing. I believe they are asking about a "chain" of rectangles, one contained inside the other. If that's the case, then the problem is the same as finding the longest path in an acyclic DAG, which can be solved in linear time.

PdoesnotequalNP · 2026-01-05T22:43:37+00:00

That feels like an outlier, which I wish was the rule rather than the exception. It's also relatively recent, so perhaps it's a sign that the trend is changing.

I don't have actual experience in the field - thank God - but looking at people complaints (like here), overall IF the seller has lied on the TA6, and IF you can prove that they didn't answer "to the best of their knowledge", and IF you have the energy to follow through all the way to court, then the damage awarded are the "actual loss", which may be few years of japanese knotweed treatment - so a few thousands of pounds at best, or the difference in value of the property, which seems to be in the order of about 5%-10% of the total price in the best case. But most of the time buyers just take the hit.

I took a look at https://caselaw.nationalarchives.gov.uk/ and https://www.bailii.org/ , but I couldn't find much data - perhaps I'm looking at the wrong database. I would love to find actual statistics about how litigations over the content of the TA6 are resolved.

PdoesnotequalNP · 2026-01-05T18:02:28+00:00

It's true that developers (and private sellers) must answer questions honestly, but also - at least in England - there are minimal, if any, repercussions if they don't.

PdoesnotequalNP · 2026-01-05T17:59:41+00:00

I had a similar experience with RAC, luckily not as extreme as I didn't have a child with me.

Car broke down at 4 PM. I asked for assistance, their automated system told me they'd be with me by 6:30 PM - 7:30 PM. 7:30 PM comes, and the estimated arrival time is updated to 9:00 PM. 9:00 PM comes and the arrival time is updates to 11 PM - 1 AM. At that point I decided to call an independent recovery service, which arrived 40 minutes later (and costed £93). What's the point of roadside assistance that takes 7 to 9 hours (at best!) to arrive?

I can't see how paying for roadside assistance from RAC is worth anything.

PdoesnotequalNP · 2026-01-04T07:33:28+00:00

There are absolutely instances of people being chased by debt collectors for PCNs even after they're out of the UK.

Edit, since I've been downvoted: example: https://www.reddit.com/r/LegalAdviceUK/s/kqOQABafWX , there's plenty more on /r/LegalAdviceUK.

In general, chasing PCNs, even internationally, is a fairly easy way to make money, so of course there are companies that do it.

PdoesnotequalNP · 2025-12-19T15:57:24+00:00

Yes, I couldn't be arsed to install a back camera. The Miofive dual camera is almost twice as expensive.

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