skysight-inc/HackerNews huggingface dataset:
If the code has been optimized to the point of being illegible/difficult for others to maintain then, assuming you’d like to update that code at some point, you’ll need to pay for that too.
1. They never say what they are actually growing, other than fruits and veg.

2. No comparison is made to similar efforts in the last few years.

3. No mention of disease and pest issues in confined spaces.

Let’s run the numbers.

100M is capital costs for 150 acres/60 hectares. Just building costs.

https://www.thebalancesmb.com/what-you-should-know-about-ver...

Water use to be saved. 1.5 acre ft for irrigated crops in West

https://www.ers.usda.gov/topics/farm-practices-management/ir...

So, 250 acre-ft for 60 hectare crop annually.

Acre-ft water cost: let’s say 2K per acre-ft

https://waterinthewest.stanford.edu/groundwater/charts/cost-...

Water was going for as high as 10K/acre-ft.

100M can buy 10K to 50K acre-ft.

That’s the water use equivalent of 40 to 200 40 hectare farms.

Say vertical farms save 50% on water.

Vertical farms need to be 100 to 500 times more productive per acre to cover building costs alone with water savings.

Quite a goal.

Let’s consider land efficiency.

Ag land costs about 3K/acre US

https://www.ers.usda.gov/topics/farm-economy/land-use-land-v...

40 hectare - 500K

So 100M buys 200 40 hectare farms. And that doesn’t depreciate...it’s land.

So 200 times more productive to pay for the conventional land equivalent.

Together, you are still in the two orders of magnitude more efficient just to cover building costs for vertical.

And it just goes up from there.

The US has a lot of very productive ag land...
If non-uniqueness means "there are others that look like you", it is clear that giving them less identifying clues makes things harder.

The question is how to do it tho, because some things might actually be useful: if your browser tells the site you prefer dark themes the site can react and display your prefered color scheme. If the browser tells the site how big your viewport is it can give you a site that fills that viewport neatly — and if the site can do these useful things it can also track you using that info.
One in x browsers have this value:290162.0

for me – that one alone is probably enough to make me unique. I got the exact same number for system fonts.

I guess it's near-impossible to get the features of accept-language without fingerprinting you :-/ but why does js need to know what fonts I have?
Interesting! I did not yet! will take a look. I remember swift was working on something similar to seamlessly call Python.
HLS seem to be the more popular format these days and browsers seem to start supporting it natively. I said hls/dash because both formats offers mostly the same benefit compared to just simply embedding mp4 files directly. You can use hls.js for hls and dash.js for dash, or video.js for both.
Thanks, just one site was having trouble. Fixed it.
We have our LTSS -> Long term support at SUSE. Just in case you're a big government that wants to throw us lots of money.
MRNA Vaccines – A Perspective from a Software Developer
This reminds me of a cartoon I saw a long time ago. Wile E. Coyote had finally caught and eaten the road runner. Now his life had no meaning, and he was slowly drinking himself to death. Don’t end up like Wile.
A more formal treatment can be found in "Elementary Number Theory and its Applications", Kenneth H. Rosen, 3rd Ed, specifically Chapter 4, "Applications of Congruences".

The 7 * 11 * 13 = 1001 development in particular appears just after example 4.4 and is then generalized to arbitrary bases by theorem 4.3. For example to divide by five in octal, do the alternating sum trick on digits grouped in pairs, because 5 divides 8^2+1.

Though it quickly stops being useful for manual checks, Fermat's Little Theorem is a fun gizmo. It says for any prime `p` (say, 17) and base `a` not divisible by it (10), we have that `a^(p-1) % p == 1`. Put another way, so long as we meet the criteria (prime, doesn't divide base), we can form a divisibility test by summing blocks of `p-1` (16) digits and testing the result, just like the `3` case.

Further, since `p-1` is even we can take the square root of both sides (`a^((p-1)/2) % p == +/-1`) and use either the sum or alternating sum tricks with blocks half that size, depending on the sign of the final `1`.
You sir, must have never played the IT guy to this teacher you speak of in our public school system. I challenge the “easy” assertion with great confidence.

/meant humorously but also seriously serious.
I mean, he is infamous for "breaking" Gyllenhaal on Zodiac, after 80 takes
> Are sector writes atomic? And if so, for what size sectors?

As a PostgreSQL hacker I have the same question, and I know the MySQL people do too, and I wrote some more specific questions and backgound, over here: https://wiki.postgresql.org/wiki/FreeBSD/AtomicIO
And after you know each instruction boundary, now you have to do a massive mux from positions in the cache line to separate decoders. As I understand, that's a big part of the problem, and essentially costs more than a single pipeline stage.
Not the OP, but I can answer some of your questions. I made enough about 15 years ago to never have to work again. It didn't take long to learn the following lessons:

1. Not working gets boring fast. In less than six months I was casting about for something to do. I still work, not because I have to, but because it gives me a reason to get up in the morning. It's not working that sucks, it's having to work that sucks.

2. You can get used to anything, and hardly anything is as nice in reality as it is in your imagination. The trappings commonly associated with money -- houses, cars, private jets -- the charm wears off shockingly quickly and it starts to feel like a burden and a PITA. The houses all need to be furnished and maintained. The cars get old and need to be maintained. Even private jet travel is not all it's cracked up to be. Today we have one house, we drive old, boring, but incredibly reliable Japanese cars, and we fly commercial (though I have to admit that being able to go business class is awfully nice).

Money is just a lever. If you focus all your mental energy into acquiring the leverage without ever giving any thought to where you want to pry, you can end up badly lost.
It is pretty amazing for what it is, but it definitely is not "beating _desktop_ top end AMD chips in single core performance"
Roblox is really culturally interesting for kids. So much of my TikTok audience plays Roblox and I tried making some games in there but the tooling and UX has a lot of friction. I loved reading this post though and feel happy that things will improve in the future. Roblox is huge!
> The new Macbooks were on the horizon, but I figured I'd wait for v2 of whatever came out.
SpintronicsーControlling Magnetization Direction of Magnetite at Room Temperature
>how can your accuracy on the error bars themselves be 4 significant figures

They aren't, but that's still the number you got. Chopping off the digits means you're slightly changing the result. It's like Tic Tac and their "0g of sugar" label, despite being 90% sugar.
> If you are in the business of charging complex prices per bits over the network, then docker seems to be quite a good investment and making it as popular as possible is a good strategy to print money. /s

True, that.

To be fair, at least it allows me to avoid lots of the brokenness of Python packaging.
For the exam. After that most of us will quickly forget it.
It’s possibly much more. http://www.frankmcsherry.org/assets/COST.pdf Demonstrates, and it is totally in line with my experience, that using common scaling mechanisms has an immediate x10-x100 cost before you start to realize the (almost linear) scale in the number of machines.

Just adding Hadoop costs you x10; to go 100 times faster (compared to one machine properly written without Hadoop) you need 1000.

Common web app scaling is not quite as bad, but it is quite bad. Philip Greenspan had shown back in 1997 with the original arsDigita system that one machine hosting db+web could do better than the then-prevalent multi-machine deployment. That’s still correct (and still mostly ignored in scalability discussions cause it is boring and requires thinking ahead).
This video by Every Frame a Painting is a really good introduction to Fincher's style:

https://www.youtube.com/watch?v=QPAloq5MCUA
It is just a way to hide the definition of local compactness of a topological space with a mistake (should be U included in K).
> How does one actually become not unique?

Actually, let's look at a different solution up the same vein, how does someone become NOT themselves? I think that right now it's less about how to blend in, and more about how to swap identifying features.

What about a pool of users, like a vpn, except the pool exercises identifiable information swapping!
Monthly salaries across the world (avg disposable income after tax and rent)
This misses that some pre-internet content looked different in Asia as well. You can see the high column count and small adverts with fancy text graphics on things like newspapers.

What's optimum has a lot to do with what people are already used to. No newspaper reader is going to be confused by a news website with the same layout as the print edition.
Accessibility issue: The “Logo” image link at the top should have alt text that describes the link destination, not the image itself.
They are most likely shipping bigger SSDs :-) Bigger the disk bigger the TBW despite P/E going to shits with every node shrink/bits per cell jump.
You needn't join in. You are free to segregate yourself.
A log cabin birthplace building kit for prospective politicians
This seems completely contrary to the point of HN. Every great post on HN can be construed as market research. Show HN is a whole category dedicated to the subject, No?
I rent a virtual server with IPv6 connectivity. Like you, I use WireGuard to uplift[1] any machine I use into the same data center as the virtual server.

All my machines now have static public addresses. All my containers too. The firewalls are simple. It’s refreshing doing this in 2020. It also brings a sense of freedom (but not mobility) that might explain why I’m happy without a laptop.

What’s old is new. I must have had an unrequited nostalgia for 1990s Novell Windows NT Workstations, but with Linux. (Come to think of it, when I was using WinNT at University we had so much IPv4 space that they too all had routable IP addresses. When I were a lad...)

[1] Ha, I used the word uplift before remembering https://en.m.wikipedia.org/wiki/Uplift_(science_fiction)
That’s assuming that the OCSP is hosted by Apple, which doesn’t have to be the case. It sounds shitty from an app developer perspective, but app developers would have an incentive to host endpoints that make their apps runnable on macOS. This improves privacy, by distributing ocsp traffic across organizations, but also puts the burden of verification on app developers. Not sure if this would harm or help the app ecosystem
Show HN: Desktop App Without Bloat
The more movies I watch the more I agree with this philosophy. Either the movie works or it doesn’t. If continuity helps the movie work, then great. Otherwise who cares?

If you went up to Herzog about a continuity error, he’d probably tell you to get a life.
Aren't they? Look at the Epic vs Apple opinions online, people with iPhones say they actually want to be locked down to just one app store without any consumer choice.
From my experience its almost always the database. On any sufficiently complex web app with a ORM its easy to trigger literally 100 queries by loading a single page if you don't make a specific effort to avoid it.
Arguably, freight trains in North America are more advanced than Europe. They’ve had automatic couplers for a long time, they have a huge loading gauge allowing double stack freight, they have trains that can be miles long (compared to Europe which is working on a sub-network allowing 700m).

The big difference is really the infrastructure and the ownership structure. Since the infrastructure is private and being competed on, it’s not shared across operators. It’s not a public utility and consequently in a sort of optimal state of minimal spending.

Anyway, the story is much more complicated than „early adopters“.
Thanks, Werner. I'll be sure to ask your opinion at the next boat show.

For now, your quote belongs quite neatly in the list of stupid shit uninformed people have said while informed people are making things happen...

“[Regarding stars,] We can never learn their internal constitution, nor, in regard to some of them, how heat is absorbed by their atmosphere… [Regarding planets,] We can never know anything of their chemical or mineralogical structure; and, much less, that of organized beings living on their surface.”
–Auguste Comte, French philosopher, 1842

“Heavier-than-air flying machines are impossible.”
–Lord Kelvin, President of the Royal Society, 1895

“I think there is a world market for maybe five computers.”
–IBM Chairman Thomas Watson, 1943

“Television won’t be able to hold onto any market it captures after the first six months. People will soon get tired of staring at a plywood box every night.”
–Daryl Zanuck, co-founder of 20th Century Fox, 1946

“There is practically no chance communications space satellites will be used to provide better telephone, telegraph, television, or radio service inside the United States.”
–FCC Commissioner T. Craven, 1961

“There is no reason for any individual to have a computer in their home.”
–Ken Olson, President of Digital Equipment Corporation, 1977
How much can we save if we relocate?
I am happy to hopefully see the decline of amp. Remeber this is not all happening in a vacuum. Remeber google has been pushing to do things like remove the url bar from browsers too. It is pretty obvious what the end game is.
Back in 1987 I worked in adult education. One day we received PCs with Windows 1.3 (if I recall correctly). We were supposed to develop education software, but I was not too much impressed with Windows at that time. And we received no training at all on Windows programming. I looked at a famed book of the time on Windows (Petzold) and it it looked far more complicated to program on Windows than to program on DOS. And there was competition, for example GEM the Graphics Environment Manager looked much more polished than Windows.

And it seemed to my younger self that the perspective of writing software like a monk, on an subpar platform, was not very attractive.

If I look back, I am not sure it was a mistake, my colleagues were treated by managers as a cheap disposable resource. From their perspective it was logical, Windows was cheap so people were buying Windows would not invest much, the only business model was to use cheap labor and mass market.
having read the (yes, quite long) whole article, I don't see where the author asserts that Romer was "mostly correct". "Mostly cohesive but critically flawed" would be a more accurate description of the author's conclusion.
I think the lints are on by default, though, so it'll compile but you still get warned.
I generally keep a few things like this on hand as starting points, and then build my own additional CSS rules, and maybe a few purely presentational classes on top in an additional stylesheet. The "Cascading" part of Cascading Style Sheets is a beautiful thing. ;)

@sdan: Thanks much for those links, BTW. Super-helpful stuff right there. https://newcss.net/ is my current favorite, but it's nice to have so many options now to play with. :)
Docker in production is the Dominion voting machine of the IT world. :)
Okay, thanks. And why would it be faster? Optimizing !! in the JS engine seems trivial to me.
Show HN: Searchbot – A powerful search bot for Discord
...and typo minefield ;)
Exactly. You can still use classes all you want. But by including this css you essentially just get good looking defaults.
But OP isn't a newbie going to coding school, he/she already knows JavaScript and webdev in general ! Of course if you don't know programming at all it's harder (even then, 3 months seems like an awful lot - this year I teach programming to graphic design students and in ~15 hours they are already able to do neat things on their own with p5.js).

To give my own experience, I'm almost exclusively a C++ coder but had to do two Web projects earlier this year, a React one and a custom one, and even though both times it felt like eating nails, it didn't take more than a day to "get in" ; I'm confident that it's be the same no matter the language except maybe APL and derivatives :)
Wasn't that part of the intrigue when computers and games had cables and cartridges and you needed to crawl behind the TV to connect it when you wanted to play? The romanticism is lost. I wonder for me, getting involved back then was hardware related.

Thankfully Lego remains.
Aplogies for the meta: does anyone know/how do I find out what component library is used on the site? It looks to me some kind of material design flavor.

Context: I'm after a flexible material-like table component for a personal project.
Ask HN: Tech stack for Tinder-like dating app?
Hi
I am a college student planning to develop a Tinder-like dating app.I have not developed any "production quality" applications before.What tech stack should I go with for back-end?
Based on development speed,less server cost,uptime etc.
I have some rough ideas.Please let me know your suggestions:

1.Python (Django) or golang
2.Python or Erlang for chat
3.Relational or NoSQL

Edit:I am not doing this project for grades.Thanks for the suggestions

Edit2:I want this project to be "well-engineered".I want this to perform well,scale well,etc.I want to do it "right".I am going to spend about an year on this project ( I could take less.But the main purpose is to learn as much as I could and to work on the best tech stack out there for this type of project).So I want the stack to be worth learning.

Thanks for all the suggestions
Yeah, you're absolutely right. I tried to equate typescript adding types to javascript with … all the things C++ adds on top of C (and then some), but the analogy doesn't really stand if you take my words on face value.

But the basic premise holds, I hope.
Don't you have any loved ones to consider? If not, then at least please think of your own life, because there's no more room for you in the hospital any more.

Maddow: We feared Susan's Covid would kill her. Your risks could hurt those you love most.
Rachel Maddow reveals that the reason for her ongoing quarantine is that her partner, Susan, tested positive for Covid-19 and is still recovering from severe symptoms, and implores viewers to consider their loved ones when they calculate their own Covid-19 risk.

https://www.msnbc.com/rachel-maddow/watch/maddow-we-feared-s...
"You wait for months and months"

Yeah, bullshit.

Single-payer public health system, Australia:

I went in for a routine angiogram and was told "Your cardiac artery is very blocked. We're not sure if we'll let you go home tonight. You might need immediate surgery." But in the end, they did let me go home.

So then I was put onto the Waiting List. Some wait. Less than two weeks later, I was given a triple-bypass.

Out-of-pocket cost to me for a cardiac triple-bypass and six days in hospital, including 2 days in ICU, was ZERO.
You can still be tracked with all your other identifying bits. Especially if your the only one who’s doing this.
Show HN: Practice your pronounciation for any language
We use it as the default at SUSE. In SLES and openSUSE.
not to mention that if we could magically poof 30% of the working age population into KE jobs overnight and still have a significant amount of workers for sticking shelves, because the labor force participation rate is abysmal.
In case anyone else shares my initial confusion, Weinreb's comment on this article is at the very end of the above link:

> I just came across “Symbolics, Inc: A failure of heterogeneous engineering” by Alvin Graylin, Kari Anne Hoir Kjolaas, Jonathan Loflin, and Jimmie D. Walker III (it doesn’t say with whom they are affiliated, and there is no date), at http://www.sts.tu-harburg.de/~r.f.moeller/symbolics-info/Sym...

> This is an excellent paper, and if you are interested in what happened to Symbolics, it’s a must-read.

His comments follow that.
Without Sweet Sugar Coconut, Coconut Rotti Is Incomplete
Green hydrogen costs need to fall over 50% to be viable: S&P Global Ratings
Donald Knuth – The Patron Saint of Yak Shaves (2015)
I'm quite disappointed in the comments I see about this spring wheel. Only a couple commenters seem to be actually thinking... Tsk tsk.
Two powerful groups have entrenched, vested interests in illegals:

- Farmhands and food processing plants in the US are largely manned by illegals.

(One of the deadliest sources of corona deaths in Canada has been farm labor migration this summer.)

- Democrats hope that if they don't build a wall, the illegals will eventually vote for them.

However the EU has discovered what happens when you relax border security - you lose control of who is in your country, and it becomes literally unaffordable to process and deport them.
AWS Re:Invent Con – One-Pagers
ESPlay Micro V2 – Handheld ESP32 Game Console
It really was a good name. Take anyone off the street from the (recent-ish) past and ask them what a 'play store' is. At least the word 'Market' makes a little bit more sense.

Who goes to the store to buy some extra 'play?'
Exploring the relation between parts and the whole
I would love to see a world where your monthly government ethereum check is balanced against some equation like the number of open source PRs merged * repo utilization
You might also like weighted digit sums.

I'll copy the example from german Wikipedia article [0] as you might generalize from that easier as when I would write it down in mathematical notation:

Here are the weights for 7:

1 ≡ 1 (mod 7)
10 ≡ 3 (mod 7)
100 ≡ 2 (mod 7)
1000 ≡ −1 (mod 7)
10000 ≡ −3 (mod 7)
100000 ≡ −2 (mod 7)
1000000 ≡ 1 (mod 7)
...
10^n ≡ a_n (mod 7)

Then multiply the weights with the digit on the respective position and sum up. Repeat if you like. If the resulting number is divisible by 7, you know that the initial number also was.

Example:

853629:

8x (-2) + 5x (-3) + 3x (-1) + 6x 2 + 2x 3 + 9x 1 = -16-15-3+12+6+9 = -7, therefore 853629 is divisible by 7.

[0] https://de.wikipedia.org/wiki/Quersumme#Gewichtete_Quersumme
People that “coin terms” that don’t spend the two seconds required to Google it and then spread around statements like “I coined it” are self-aggrandizing.

It’s worth calling them out and discouraging this behavior because it leads to missing entire fields of previous work for both the author and people who build on the work.
It's surprising to me that all of apples designs this year seem a bit lackluster on the mechanical design front.

Take the fan in the MacBook Pro here for example. It seems highly unlikely that this year's design and last year's design really both needed exactly the same cooling system - they have totally different thermal characteristics. A redesigned thermal system could have been smaller and lighter, leaving more space for a bigger battery or any other new feature.

The plastic spacers in some iPhone models show the same... Was there really no better use for that space, from a company who traditionally would pay big bucks to make a chip 1mm smaller?
I don't know whether artificially increasing the length of telomeres increases the incidence of cancer, but cancer usually upregulates the creation of telomerase. Telomerase is part of an enzyme complex that lengthens telomeres.[0] In other words, most (almost all?) cancers end up lengthening their telomeres themselves.

[0] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4915101/

The background section seemed to give an overview of this, however, I don't know how good this information is.