skysight-inc/HackerNews huggingface dataset:
The glory days are definitely over both in terms of creativity, talent and motivation. But there's been a bump in the past 1/1.5 year so with the more frequent jailbreaks coming out, which is quite nice.

Drama, yes there is a lot I guess. But I've been an active developer since 2012 and I think it is easy to not involve yourself in it.
Klopp told to activate clause, leave Man United fuming and land £65M ace
I see a version of the QR code check already in Sams Club. A person at the exit scans your bill and it tells them what to check for. Otherwise they will randomly scan an item and it will cross-check with the bill.
My best advice for you is to write modular functions that can be tested separately rather than integrated stuff that can't be disentangled.

A unit test should test the functionality of a single chunk of code. What kind of stuff are you writing?

I write webservers most of the time. So what I do is, at the top level of the request, immediately pull data off of the request so that I can access to the data in native python types that are easy to mock for testing. Each layer of my webserver does only one thing which could be gluing the auth+services together, but is still easy to mock.
You do, but you're talking about self-isolating. Here's the scenario we're discussing: the US decides that Assange has Diphtheria and tells him to stay home and not talk to anybody. Does he? Cambodia decides that the opposition party conference is full of dirty politicians and cancels it. Do they still try to meet?

In the first case, Assange would be protected by due process and a public hearing (that is the present US law for quarantine orders). In the second case, there might be a problem. You do not want the government using an emergency as an excuse to grab unlimited and unchecked power.
Hannah Arendt and the hierarchy of human activity
UK ones have baskets you put stuff in, but they appear to be using multiple barcode scanners, at least for low value items. I'm guessing there is a cost-benefit trade-off at some point, as well as a potential functional impact problem (hard to put an RFID tag in a solid lump of plastic!). The combination seems to work well though, and is certainly faster than most supermarkets.
I believe it's true for the other direction as well, it's just pretty rare to see a 7% upward move in a single day. I mean, it's rare to see it on the downside too, but not as rare.

Limit up/down rules are not discretionary. They're circuit breakers that fire deterministicly.
Fear will cause more damage than the disaster itself. I don't agree with your priorities, I think your behavior is just as destructive as you must think mine is, and none of that is likely to change.
Well let me think of something.

Maybe they know something about the virus and what happens when it mutates, comes back, and reinfects you? (Or maybe someone who thinks the know something told 'em that.)

I mean I know nothing so that's just a wild guess, but I think it is equally naive to think that looking at the current stats is enough to extrapolate and say anything and everything that needs to be said.
"They" don't do anything - this is called a circuit breaker, and is automatically triggered. There are three breakers:

L1 - 7% down before 3:25pm - 15 minute halt

L2 - 13% down before 3:25pm - 15 minute halt

L3 - 20% down - halted for the remainder of the day

Only a single L1 and a single L2 breaker can occur in a single day, e.g. the market falling below 7%, rising, then falling again will not trigger a second L1 breaker, but falling to 7%, up to 5%, then down to 13% would trigger an L2.

FYI this is the kind of thing you have to know to become registered as a securities representative.
Consider the alternative.
Just use Google Spanner
Obviously you don't run off to your favorite bar, but it all depends. If the government won't pay you to skip work and your workplace won't give you PTO, you might not have a choice if you want to make rent.

And I would certainly flee the area if it were couched as an order rather than a request; I will not put myself in a position where I am essentially under arbitrary arrest by a capricious authority which changes its response every few hours, and I am shocked that anybody would.
correction: it's not fermentation, it's an enzymatic process referred to as "oxydation", as I was reminded while fact-checking for another reply.

There is fermented tea, but the tea you drink is probably not.
IRL makes sense. My [clearly wrong] assumption was that we're referring to online discussions.
Pros and cons of a new Coronavirus Crisis (1998,2008 2020?)
Market conditions are one of the important things for a startup. As you know, Uber and Airbnb launched during the last financial crisis.

According to common knowledge, people would like to make some extra cash, would like to save as much as possible, and would like to spend money on entertainment during the crisis periods.

The question is, who is going to survive, and what kind of startups do people need if a new crisis is coming?

Pros for a startup:

a new market opportunity;
less expensive office rent;
less expensive software employees;
less competitive market

Cons for a startup:

less money for fundraising;
bad time for an IPO;
no moon shot startups;

What else do you see?
I think relying on the good will of the masses as volunteers is like bringing a knife to a gun-fight. The opposing side does disinformation for profit[1] and has a budget for it.

[1] https://news.ycombinator.com/item?id=22526530
As a student I frequently will end up putting items in my backpack. It is way more convinient to just stuff stuff into my backpack than it is to get a cart and go through the grueling check out line that takes forever because someone has to scan every item, and a lot of people still don't use contactless payment. I hate this process so much now that I only get my groceries delivered now, but if there were a local convinience store with this technology then I would totally go there.
The Kolmogorov complexity of the program, eh?

Alan Kay' VPRI's STEPS project used PEG parsers to create math-like DSLs to in their attempt to go "from the desktop to the metal in 20,000 lines of code."
It's still at the ~8cents per item pricerange. Metal cans require a different kind of more expensive tag.

Thats still to much for groceries where items are typically only ~$2.50, and the staff time to scan a barcode is ~$0.01
Serious question, is anyone watching this carefully and trying to determine when things will bottom out (perhaps in a week or two), to buy stocks, ETFs, and such at the bottom of the dip?

Hindsight is 20:20 of course, but there's a number of equities that one could have purchased shortly after the 2008 financial crisis that proceeded to make significant gains between 2009 and 2019.
Okay thats fine, but who implements/decides these circuit breakers ? And what purpose to they serve only to limit a mass sell off ?

Nice point about only 2 daily. But still seems crazy.
Days with a large pre-market drops often follow this pattern. As the end of the day approaches the selling often becomes panicked again.
Show HN: Rebuilt from Memories – 3D environments of Aleppo before the war
Pretty sure they're no longer manufactured by Samsung. It's been TSMC since the A8 [0].

[0] https://en.m.wikipedia.org/wiki/Apple_A8
For context, you are being downvoted for being smug and not adding anything to this conversation.
What it's like managing 10M users as a solo developer
Both this article and your comment are interesting to hear because in my experience of talking to those in anti-malware detection companies, the number that they care about more than anything is reducing their false positive detection.

This is completely anecdotal, of course, but "The first time you prevent an executive from sending e-mails because you think Outlook is malware, is the last time they run your software."
My suggestions are things that a lot of people could start doing without the government being involved.
The Evolution of Ember.js at Intercom
I believe its something along the lines that when there is more moister in the air, the water droplets grab the floating particles and fall to the ground. Thus higher humidity often slows the impact of airborne virus, hence we have a flu season.
El Capitan Supercomputer: AMD CPUs and GPUs to Drive 2 Exaflops of Compute
No one will be able to time this. We don't even know if this is the start of a [global?] recession or depression.

If you haven't already, put your retirement into bonds and hold on. Honestly it might be a good idea to grab some cash from the bank to keep at home - bank runs are not outside the realm of possibility, although we have credit cards and other internet based payment methods now so it's probably less of a concern now.

Edit: let me just preface my advice by saying if you have extremely high risk tolerance, now is a good time to buy, but be prepared to lose. If you are near retirement, now is probably the time to pull all of your funds out of the markets and into something safer. Based on the 100 year history of the DJIA, and the fact that the virus is just starting to spread in the U.S., the floor could be much lower.
Lots of companies didn't care about skills and talent in 2008, they laid off engineers making the highest salaries at my company, pretty much top to bottom in order. Except for one who was good friends with the CEO but even he was let go a few rounds later.
Would they also circuit break on 7% increase, in order to give people time to come back from positive feelings?
> 9,058,741 times,

This says nothing about the number of human users.

> This is a very different picture from a tiny isolated community of a few thousand developers that you seem to be painting.

https://opencollective.com/lambda-island#section-contributor...

They have 13 contributors.
Not all flus are alike. Some, like H5N1 or Swine Flu were investigated and tracked in great detail, to the point of individual transmission chains.
> Twitter is awesome because it doesn't operate under the growth for growths sake mentality plaguing many other companies.

Is that really true though? They've been a huge beneficiary of fake news, astroturfing and bots. They've only relatively recently started to do something resembling policing of these things.
Don't you know it's not good to be racist? That it's bad? That we shouldn't discriminate racially, it's bad. Judging people on their religion is bad. It's bad to judge people by their skin color, their social background, or their nationality.
I'm sure huge numbers of people are watching for exactly that opportunity, but if it was easy to reliably spot the tops and bottoms of markets, there'd be a lot more rich day-traders out there :)
Everyone loves free markets until they don't.
I saw that thread as well and there were so many comments about how he cannot be trusted and that they are an institution bought by the Chinese.

I don't know. I might just be horribly, horribly naive. That is not meant to be sarcastic, but an actual possibility. But I really do feel like if we cannot trust institutions like the WHO, then we have zero facts and everyone can just come up with their own facts/form their own beliefs about this disease. I guess the one thing everyone is on the same page about is that we should wash our hands more frequently ...
yes, but since we are talking about size, a hello world Clojurescript is going to be at least 80KB or greater.
Article lists multiple leading experts working round the clock on this, all saying they're not sure why the virus is so contagious.

But some random person of uncertain credentials says "It's really not hard to grasp why it would spread quickly".

If you have some kind of expert credentials with serious evidence, then it would be great to hear it. Otherwise your opinions are just unhelpful, potentially dangerous noise - and the internet has no shortage of those already.
> Only a single L1 or L2 breaker can occur in a single day.

Then why does L2 exist? It seems redundant, L1 would get triggered before L2, and only one can occur in a single day, so why have L2 at all? What am I missing here?

Edit: Also, anyone who downvoted me for posting the same question as someone at the same minute, you know what to do.
Any kind of censorship can, and will be abused. Today it's the "bad actors" tomorrow it's the enemy of the state (you).
>You will be jailed... in the Western world for questioning holocaust evidence

The context defining claims related to the US and China, not Germany. You will not be jailed in the US for questioning the Holocaust.

> harassed, ridiculed

Ok, but still not relevant to the conversation

> Killed

I hesitate to go further off topic, but do you have a citation for this claim?
Right, and some APIs let you write your own. Getting a custom one to hand out actionable error messages is a bit tricky but quite worth it.
Exactly, consider Apple Retail employees, who need to be searched [1] every time their shift ends due to suspected theft. Having automated cameras that can better track products could significantly alter this check.

[1]: https://www.theverge.com/2020/2/14/21137580/apple-store-reta...
It's important to note that limit up/limit down (LULD) is not the same thing as the circuit breakers. They have a very specific meaning and operate independently (with much more complicated rules as well). You probably know this, but others reading your comment will probably not!

There is also no automatic upside circuit breaker.
Without going into too much detail, short answer is yes. Most people don't seem to know how far away current setup is from 'free market' touted in school.

It is weird given that this information is not hidden. It is just not widely spread.
> Only a single L1 or L2 breaker can occur in a single day.

I don't follow. You'd hit 7% before 13%, so how would L2 ever execute?
But it's an external database with its code and its optimizations. In this case it seemed that it was just doing a binary search, but it was using an already sorted dataset that the OP of that comment wasn't using.

I again point to the C standard library. Modern standard-compliant C can do almost nothing without it. I don't even think it can handle IO without it.

The language is cryptic and the variable names are even more cryptic.

You're thinking of it in a light that doesn't help you understand; don't think of it as a variable, think of it as a definition. "jk is defined as..."
These are well documented rules. They have been built up over years of experience. Not to say its perfect. But they are established and understood by the participants. Further refinements may happen based on today's experience.
The Colors of National Geographic
There is always someone buying multiple lottery tickets/scratch cards in UK local stores and, yes, it does bring everything to a standstill.

Other regular delays seem to come from staff being perplexed by the complexity of the checkout system.

Also, mostly middle aged women being taken by complete surprise they are being asked to pay for stuff which leads to much fumbling around looking for purses and wallets and then they'll insist on counting out the exact change.

Then the constant 'Do you need a bag?', 'Do you want a receipt?' 'Do you have a stupid loyalty card?' routine.

Bring on automation please and make the world a much more happier place!
How does this reconcile with the current system for more established firms where employers typically contribute a substantial amount towards subsidizing employee healthcare plans?

Not to be a downer, but this feels like an offramp from our current system down to an even worse one, one where employers can now substantially cut back on employer contributions towards health insurance. It may be great for your success, but it just feels like it may prove to be a net-negative on US healthcare coverage generally because of the loss of collective bargaining by employers on behalf of employees, assuming the model takes off.
Are you seriously bringing that up again? He won the election. The number of votes is irrelevant. Maybe that's why he won: he actually understands this simple fact about how the Constitution works, and people like you either don't, or simply refuse to.
Or they don't know what they are talking about and have an agenda.
Also because of algorithmic trading. You don't want to get into an accelerated get-out-now spiral.
> I often find refactoring in the spirit of functionalisation more powerful, because then what I do becomes less about implementing a specific piece of logic, and more about creating a robust library of combinators that can be puzzled together to implement the desired business logic.

The problem here is that your state is almost always transient and non-inspectable. Almost all the complexity in any non-trivial program is in the state, whereas the transformations are usually trivial and things like combinators don't really matter one way or another.
US population is about 330,000,000 so 1% would be 3.3 million, not 30 million https://www.census.gov/popclock/
AFAIK people can still trade in private, just not on the NYSE.

So don't worry, it's only us regular guys that get screwed. Big firms can still contact each other to make deals.
That's literally all of this website
Ditto. Intrusion of for-profit entities into online communities have well and truly killed the spirit. I base that on the fact that being exposed on any online destination where people congregate these days such as, Twitter, Reddit, hacker news, Facebook, for even a few minutes a day results in me feeling tired, demotivated, sluggish, angry, confused and just generally down. This is in stark opposition to how hanging around in communities of yester year felt. Further, I'm 27 so it's not like I'm some old veteran that yearns for the 90s or something but the quality has palpably gone down year after year. Sure there are small enclaves within these behemoths that somewhat manage to preserve a pleasant community but they're increasingly hard to find and only a matter of time before they too lose that magic to effects of profit driven actions.

Welp, on we go to the next post to read opinions of a nauseatingly self-assured tech nerd, who makes an above average living, declare everyone beneath as failed experiments of nature based on supreme principles of the free market..
Sorry - I meant that neither L1 nor L2 can trigger twice in a day, E.g. down 8%, up 2%, down 9% does not trigger a second L1 breaker.
It appears that a majority of people my be deficient. The blood serum measure of 25(OH)2D3 that are considered in the 'normal' range is based on how much D you need in order to not have D-deficiency diseases (e.g. rickets), and not based on an amount that may be optimal (and I think those 'normal' ranges are based on epidemiological, not randomized controlled trials). Those values also do not reflect activated D3 -- 25(OH)2D3 is not usable by the body in that form, and much of it goes through the liver, and then the kidneys, to get activated into 1,25(OH)2D3, which is the form that is actually used by the body. Studying tribes in natural settings (Masai warriors, for example), they have 2-4x (maybe more) the amount of D in their blood (25(OH)2D3). Also, it seems it's really difficult to take enough D to induce a toxic response. Yes, it's fat soluble, but that doesn't mean it's being stored in your body fat. You have to reach a level significantly higher than the normal range before any D is available for storage in body fat -- there is a graph in one of the talks, I think the first one, that shows that. Cases of toxicity so far have been of people taking millions of IUs of D3 per day over an extended time period, inadvertently. D has been reduced or eliminated from foods precisely because of the few cases where millions of IUs were being put into bottles of milk which wasn't supposed to happen. Europe banned D in foods IIRC. This was decades ago. Many are now deficient because they stay out of the sun or wear sunscreen. Surprisingly, taking much higher doses of D battles TB -- they now think that sending TB patients to solariums and warmer climates worked because they were getting more sun, and thus making more D. I've been taking 30,000-50,000 IUs a day for about two months now, not because of coronavirus, but because of these three talks by doctors and other evidence I've looked at. I do think, based on these talks, that the majority of individuals in this country and others have suboptimal D levels and D availability:

https://www.youtube.com/watch?v=B9SNfrE7P1s

https://www.youtube.com/watch?v=EP81YMvs4yI&feature=youtu.be...

https://www.youtube.com/watch?v=N20nyUTqiyY

/s.
How would this person in case 1 feel about not knowing what they're being billed for when they walk out ?
These rules are completely in keeping with the free market.
https://www.nasdaq.com/articles/market-wide-circuit-breakers...
I mean expose the ability to write your own. When I first used them, I thought all frameworks allowed this, then bumped into some that didn't, or at least not in the popular version at the time.
I'd guess it's more the "demographic X is not suited to vote because they tend to disagree with my interests", rather than any singular position you aligned with the demographic, that was viewed as disturbing.

I agree. It's not even the innate prejudice that's the problem here. It's the devaluing of another person's experience and opinion. Pretty slippery slope you're arguing for.
This means each execute once, not mutually exclusive.
It's specifically because there are huge numbers of people watching this carefully and trying to do that that it is irrational on the margin to try to do so.
If by "EV" you mean "electric car", then they almost always do (and it's almost always a single fixed reduction, around 10:1).

But a lot of non-car electric vehicles (maybe the majority) use hub motors, where the wheel's angular velocity is the same as the motor's.

That's not the whole story, though, as a more illustrative number is the ratio between wheel radius and the motor's air gap radius, multiplied by whatever reduction gearing is used. I don't think there's a name for this concept, but you could borrow "gain ratio" from bicycles (https://sheldonbrown.com/gain.html).

For a hub motor the wheel pretty much has to be bigger than the motor for ground clearance (unless you're a monorail or something), so the gain ratio is less than one (maybe 0.5 for a skateboard and 0.25 for an ebike).

And practical wheel speeds tend to be a lot lower than even an inexpensive motor's top speed (not surprisingly, by about a 10:1 ratio).

Bottom line is a hub motor tends to be ~10 times larger than it would need to be on a peak torque basis, so fitting more torque into a smaller package (even at the expense of top speed) is a win. On the other hand solving the peak torque issue doesn't magically solve other issues that might crop up as you downsize (e.g. heat).
I'm pretty sure these need to be hit consecutively.