skysight-inc/HackerNews huggingface dataset:
> You're right, but the tricky part is, how do you explain that to children who are just being introduced to the concept of adding fractions, without leading them off track? That's hard!

I think it's the opposite: if you are taught the procedure for adding fractions without understanding what's going wrong here, then you just know a procedure, not a concept. Taking the detour into the detailed discussion of what 'the whole' is takes longer, but cements that crucial idea, and so lays the foundation for understanding addition of fractions more generally.
Show HN: Hacker News, but with 3 sections of Top, Best, New Stories in 1 view
I appreciate that there’s probably a lot I don’t know or understand about the national security aspects of this but it seems wrong to not share as much information as possible with as many researchers as possible in order to help as many as people as possible. Protecting security interests is one thing but this press release specifically mentions protecting intellectual property and that seems kind of tone deaf.

I also wish they would explain how treatment options are jeopardized, even at a high level:

> The potential theft of this information jeopardizes the delivery of secure, effective, and efficient treatment options.
Which of these are scandalous, exactly?

If the OP is aggrieved by the operation of cpp, perhaps they could have explained in each of their points what cpp is doing wrong, and how they would improve the standard. Instead, they just list 'odd' behaviour, with no comment about why it is wrong and how it could be better.
Right - it gives the illusion that you're 'getting an amazing deal and wow these people are great' when it reality you're probably getting gouged without the consulting and have to opt in for fair prices.
> Is this communication style a function of being involved in FSF, or does FSF just naturally attract very angry people?

I agree that the article was poorly written. But you seem to be implying here that people involved with the FSF, as a whole, tend to be angry. I’m not at all sure that that’s true.

> It's not unreasonable that people should be compensated for work that they've spent months or years of their life working on.

Sure, agreed. And downloading unauthorized copies of ebooks from shady web sites, like the one mentioned in the article, isn’t a fair solution. But, for example, buying only ebooks without DRM from legitimate sources, and otherwise buying paper books, is one possible fair solution without DRM where writers and publishers do get paid.
I've run into the situation where I want to buy an e-reader. I like the Amazon paperwhite product but my public library doesn't support it (they support Kobo). So if I want to get books from the library I need to buy a Kobo.
What are you talking about? EU is tightening the screw on manufacturers so hard that they are literally panicking right now, as there is literally no way they can meet the regulations as is. Currently there is a requirement that fleet averages have to be below 100g/km for CO2, soon that falls down to 75g/km and then 50g/km - with every car sold above that threshold incurring heavy penalties. We're seeing literally every manufacturer rapidly moving towards hybrids and pure EVs, because there is no way to meet those targets otherwise - VW has completely axed all ICE versions of the Up(and their Skoda and Seat equivalents) going full electric, just to bring their averages down. Even Fiat, whose market was always low-end, cheapest of the cheap vehicles, axed ICE Fiat 500, and has gone full electric. Panda(!!!) is now a hybrid! Even Dacia, which is literally bottom-bin of cars, is introducing a hybrid and potentially a full EV soon.

All of this is only happening because of the pressure from EU regulators.
See how animals HELP each other when they are in Danger.TheRavenSavesTheHedgehog
Well there's been a lot of heat/hate for hCaptcha too since Cloudflare adopted it once Google decided to start charging it's biggest users of reCaptcha.

People where ggetting hit mostly on Firefox, and mainly when non being identifiable as using a google account/service so captcha wouldn't even show.

So the answer is maybe I guess, if you think you will need the scale at which point google might wanna charge you for using it's service.
> So under a lot of legislations you wouldn't even have to pay taxes on that.

lol. try that in the USA. I dare you.
Yup, the similarities are profound. They both confront the limit of consciousness and what counts as knowledge.
The place where e-books leave me lacking when they have DRM is the ability to loan them or transfer them. It is a lot easier to get a friend to read an important book than to get them to buy it. But I can’t lend the kindle copy, which is the format I can read best.
Following Conway's Law, the problem with the internet is not so much the internet but the destruction of IRC and the centralization of email. The stagnation in open-source email software and security, the embrace-extend-extinguish of AMP for email, and the decline in quality independent email providers. Fix email (and revive IRC) and we can start fixing the internet.
>Therefore, with IPv6, telcos could disable the tethering function of the phones / charge extras, just by suitably configuring their network.

Most carriers count tethering traffic from packets received with a TTL decremented by 1, whether or not you NAT it is irrelevent. This was the case for ipv4 and looks to be the case for ipv6 thanks to this very recent commit: https://github.com/aosp-mirror/platform_frameworks_base/comm...
Paper: E2E Encryption for Zoom Meetings [pdf]
As you say, the artistic use of cross-object synthesis and analogy definitely distinguishes the advanced students from the mechanical. Advanced students develop a sort of dialect that harmonizes the mathematical objects they encounter in a way that illuminates them all.

More than any of that, though, I think what you can see (even here in this thread!) is that, while we pretend that mathematics is a single cultural practice of rational humans communicating with other rational humans, it's really many smaller communities of mathematicians, all of varying skills trying to communicate with each other. My mathematical language as a teacher of 12-18 year olds is very different from my mathematical language when I did computational geometry for a living.

Because you have many communities of mathematicians producing new notation, you end up with dialects that all sort of meld together in the same way that reading Shakespeare is very different from reading Hemingway or Eco (in translation).

The closest programming analogue would be C++, where you have several mutually unintelligible dialects spoken by different communities of programmers with different concerns.
Putting the shared files inside the Linux instance is a non-starter for me.

What requirement do you have that has to be managed without going over to the Linux side of the system?
Machine learning is AI.
How the frick did they build up such a paying audience so quickly? A quick google search of his/her username doesn't bring up much info...
"The majority of HIV researchers agree that HIV evolved at some point from the closely related simian immunodeficiency virus (SIV), and that SIV or HIV (post mutation) was transferred from non-human primates to humans in the recent past (as a type of zoonosis).[citation needed] Research in this area is conducted using molecular phylogenetics, comparing viral genomic sequences to determine relatedness. "

from wikipedia. Matches what I understand. So, not originating in a slum then.
I'm not really disagreeing with you, but I don't think it's because they're not good at it, I think they genuinely just don't care about stifling competition. They consciously target their products at the high end, professional and affluent customers. They're a premium brand. They have no more interest in chasing market share on the desktop or mobile than Gucci has in chasing market share in handbags.
A lot of people?

Relevantly, a lot of developers and ops folks who need overlaps with US hours.
Had to check. +1 works like a charm. You win.
And just the increased insecurity, job loss, and upheaval, will probably have bad effects for years to come.

I feel we know enough about the virus now and how it spreads that many things can re-open, and governments/courts should affrim the rights of businesses to require masks and enforce limiting the number of people in the store, etc. They could also make sure masks--proper surgical masks (for people at low risk) and N-95 ventilators (for people at high risk) are available.
"+" is the wrong mathematical operation for combining fractions of distinct sets.

The right operation is a weighted sum:

1/3×1/2 + 1/3×1/2 = 1/3

The "1/2" is there because each of the two sets that we are combining is the same size.
The neck collars link brings me to a weird scam website.
Thanks for your suggestion, I will explore the package.
Yep that is post C++20.

I am hardly a C++ user nowadays, but such stuff interests me, because the Windows Development team managed to push C++/WinRT as replacement for C++/CX, but are declining any improvement to Visual Studio support (at least comparable to C++/CX) until ISO C++ gets similar capabilities to C++/CX.

So given that some C++ usage is required depending on which APIs you want to access from .NET, you can imagine there are many WinDevs not very happy with the downgrade in tooling support.

Back to your point, in what cases might such distinction be relevant?
It is kinda funny and heartwarming when you use Google to search for one of Google’s cloud products and the first result is some competitor.
I guess this were Hollywood like holographic screen less display start coming into reality.
> Join us on Slack to be a part of the Builders community.

I know it's a bit petty, but I find it quite odd that Mozilla is promoting (or at least using) Slack, when Slack has a large feature—video conferencing—which only works in Chrome due to using non-standards-compliant WebRTC. And when asked by Mozilla, Slack reportedly stated they weren't interested in fixing it.
Here is my fast io "library": https://github.com/bjourne/c-examples/blob/master/libraries/... It is very (very!) limited, but also very fast. :) Think I got about 20-50x compared to scanf.
Well, regular intelligence isn't but so useful in business either. There are so many factors in business success, intelligence is just one, and usually not a very big one.
One Million Unhappy Amazon Shoppers
*Raytrix/Former Lytro employees who now work for Google
https://lookingglassfactory.com/product/8k
This reminded me of the quote "Any science well done, is as good as magic."
> Lightsail - Amazon’s hosting provider (vps, dns, storage)

> Kinesis - Collect massive amount of data so you can do analytics (like ELK?)

Based on some of these that I'm already familiar with, I don't think I would rely on these descriptions for the ones I'm not already familiar with.
There is a very important difference between types and quantities.

For example, 1/3 + 1/3 = 1 is true, if I mean 1/3 of 3 + 1/3 of 0. 1/3 + 1/3 = 2/6 can only be true if we add some quantities, we can't make it true by choosing the right types (we could fix it by choosing a different definition of +, or =, though).
My husband's emotional return
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The Tesla thinks dangling testicles are a traffic cone
There's an interesting story about this.

In Steven Levy's new book (which I really liked), Facebook: The Inside Story, he talks about teenagers in Macedonia pushing fake political news stories to drive traffic to their ad-laden websites so they could make money.

They didn't care about the political content, the incentive was to figure out what would get shared the most/fastest so they could drive traffic. They tried fake news targeting the left, but it wouldn't get very far because people would call it out in comments and then the posters would delete/remove it.

Fake news targeting the right (primarily crazy anti-hillary stories) would spread without any resistance and drive a ton of traffic, so they ended up focusing their attention there.

I think this is pretty good evidence that there's a bigger problem on the right since the Macedonian teenagers didn't care about the politics and just wanted to drive traffic for money.

There are lots of other interesting details in that book - it's good.
Mozilla is in a infinite game. An all-in approach like that could be fatal. They are in this for the long term.

Specially because they can be out-spent massively. If Google, Microsoft, Apple, any of the competitors want, they can outspend Mozilla during their "burn all money" campaign and drown them.

Also, Mozilla doesn't exist to "make Google accountable". Mozilla is there to ensure the web stays open, and it's been doing a damn-fine job at that. Not perfect; but damn good.

Update: Also, how does balance in browser market make Google accountable? Google is far bigger than Chrome.
entitled jerk.
Ask HN: When working towards a goal, how do you find relevant books?
Every time I have a new goal in mind, I spend hours looking for the right books.

The issue seem to be that books are organised by genres, but often books from different genres are relevant. For example, if I am starting a business, I found biographies, history & even fiction books to be very helpful even though they are not "business" genre per say.

Also the timing needs to be right for the book to click. If you read a book about parenting and you don't have a family yet it might not be as impactful read after-all.

How do you typically find books about whatever is important to you at the moment?

Together with friend we came up with an idea related to this topic. To build a service that arranges books around life stages and goals instead of genres. A quick demo about how the idea could look like: https://docs.google.com/spreadsheets/d/14cn8FO7p622Vz9kFnagd8cJWPNqjtdvCbVS534GEKuU/edit#gid=0

Would love to hear how others go around this issue.

P.S: Also feel free to add any book recommendations to the demo list.
I find that a curious attitude; I rather appreciate when I come across a site that uses a serif font. Sans-serifs are so terribly overused.
I wish there was something like this for math blogs. I've tried Jekyll with MathJax but it looks kind of ugly. Any suggestions anyone?
Quite a bit of JS there.
Someone that goes for lunch at 1:00IST?
The archive of pitch decks is really just post hoc confirmation of what were excellent, well-timed, and well-executed business plans. Imagine the thousands of great pitches that didn't end so well. I have seen many excellent teams with great pitches that failed for reasons entirely outside their control and reasonable ability to anticipate.
Omg ! Just when people are planning to throw Trump from Twitter. Damn just for a simple election of 2020 ! C mon really ! Is it finally happening !
Should have used Monero
Agreed, but that is why it has been an ongoing discussion at ISO, many devs are fed up with such approaches, because it is the kind of stuff that prevents C++ to have nice IDE tooling like Java and .NET.
They're already built for it. The '73 Pontiac Bonneville I rode around in as a kid weighed 4300 lbs. And as sibling comment mentions, anything not a car or light truck will outweigh anything with batteries. Our Sprinter-based RV weighs 10K lbs. empty, and it is a small RV.
How's Rust "their" language ? It just started as a side project from one of their dev.
> In China and other emerging markets, downloading apps from app store are just something that many users would rarely do, no matter it is App Store, Play Store, or many other Android App Stores available in China. It is a big obstacle that most US developers never realised.

As someone who's never been to China and has never used a super-app: just curious, what are some of the obstacles faced installing a mobile app? Is it that most people don't trust un-curated apps?
One of the commenters gave a great suggestion:

> I would use bar models to show how the whole changes.
First, draw one bar (table) with 3 students inside; label the bar one whole, star one student and label that student as one third of that whole. Do the same thing beside the first bar model, again showing the bar as one whole, starring one student and labelling that student as one third.
Then, push the two bar models together (I’d use a Smart Board) to show a new whole: the two bars together with 6 students in the one bar is labeled as the new whole.
Point out that this is a NEW whole, with a different # of pieces. Now they would see the 2 starred students in the one new bar made up of 6 total students, so the “old” 1/3 student becomes the “new” 1/6 student once the whole changes. This is like a name change, once the size of the whole changes.
You can also show them that by cutting each “student” in half, you would get an equivalent fraction of 1/3 = 2/6 of the first one whole bar. So 1/3 = 2/6, not two 1/3’s = 2/6.

http://www.marilynburnsmathblog.com/can-1-3-1-3-2-6-it-seeme...
>The Facebook Container is absolutely pointless when you account for fingerprinting and IP address tracking.

The former being something they actively support defending against with privacy.resistFingerprinting?
It won't work on newer books. Kindle has a new DRM and if you try to install older versions of the kindle application you
will get an error.
This is information that can save lives, so I support any nation to hack on COVID research, anywhere in the world. If they patent COVID research, I also support breaking any patent.
B2B CRM space startup. We have somewhat of a middle-ground approach. Our level of isolation for customers is at a schema-level.

What this means is each customer has her own schema. Now, large customers want to be single tenant, so they have a single schema on the entire DB. Smaller (SMB) customers are a bit more price conscious so they can choose to be multitenant i.e multiple schemas on same DB.

Managing this is pushed out to a separate metadata manager component which is just a DB that maps customer to the DB/schema they reside on. Connection pooling is at the DB level (so if you are multitenant then you may have lower perf because some other customer in the DB is hogging the connections)... But this has not happened to us yet.

Large customers are more conscious in terms of data so want things like disc level encryption with their own keys etc, which we can provide since we are encrypting the whole DB for them (KMS is the fave here).

We are not really large scale yet, so dunno what they major gotchas will be once we scale, but this approach has served us well so far.
I wonder if we might see something like this operate on Mars one day, to haul cargo from landing areas to inhabited areas (or mining operations). These were apparently doomed by heavy-lift helicopters, which likely won't be an option in the thinner atmosphere there.
Stop Messing with Time
Exactly this. These are facts that have never changed and were known from day one:

1. Because the virus is spread mainly through droplets, the risk goes down if you keep your distance from other people.

2. Because the virus is spread mainly through droplets, the risk goes down even more if everyone (especially those with symptoms) wears a mask.

Since day one, since before the disease had even left China, the WHO was clear on all these points, the CDC followed shortly after, with one partial exception, which was the mask recommendation. (On masks, the WHO said from day one that anyone who was potentially infected should wear a mask; they initially advised against population-wide mask wearing due to supply.)

Masks and distancing could have and should have been rolled out the day the first COVID-19 case washed up on American shores. Both could have been enforced through stiff penalties on noncompliant businesses (no masks, no distancing, you get shut down for 30 days). They were already in use in South Korea which did a great job of getting the disease under control.

The Korean strategy worked better than the American strategy. Less death, less economic damage. Why did America screw up so badly? Pure hubris and incompetence on the part of Americans, starting with American leaders on both sides of the aisle. The war on COVID-19 was being waged and it was being beaten on the other side of the world, but myopic Americans were too preoccupied with themselves to watch and learn. It's as simple as that. Poor leadership, panic and nationwide myopia.
There is no wechat. Everything is a subsidiary of the CCP
SARS-CoV-2 RNA concentrations in city sewage leading indicator of Covid-19 cases
Not everything should be sans serif.
What do you do to 'get back into the groove' after a weekend away from work?
It looks simple, but isn't technically minimalistic with 77KB .css and loaded fonts. The first page load was actually visibly slow with the fonts repainting in a different typeface.
All these are problems, yes, but my point is they become more manageable when you have more customers. Having Dropbox as a client would be exceedingly difficult if you only have two other customers, but it gets easier as you add more customers and scale up.
Does anyone know a blogging platform that allows you to export your content as a standalone static site and or markdown/csv?
Ask HN: How did your ad income (or spend) change in the past few months?
I've read unfounded speculation in both directions: some claim it will go down, others claim it should go up... What's your experience: Did you earn more? Did your company spent more on ads?
Don’t Abandon Security During a Crisis
eBay Is Portscanning When You Connect to It
The right abstraction for a business rule management system
To add to this, with the argument of fighting terrorism, since a while Governments around the world have been requiring phone numbers to be only given to people who identify themselves by their government issued ID.

And guess what Facebook etc. are requiring at login. Phone numbers. For security they claim, yet they send spam messages to the number.
Tesla built some in California as a test bed
We got scammed out of 200$ on www.mailgun.com
Someone managed to get access to our mailgun account and/or mailgun access key and send 200$ worth of emails in Ukrainian about a crypto IPO (likely a scam).
This also makes me feel like there is not much innovation happening, but rather just copycat playbooks in different marketplaces or niches. It's a missed opportunity because different markets can inspire different solutions or focus on different problems, but not if the cheapest and lowest risk path is to do the same thing everyone else has.
The idea that "when you extend that" is something human beings can do is an absolute revelation to young mathematicians. The idea that our notations are, at least in some sense, choices that we make that come with tradeoffs is a huge point of mathematical maturity for them, and usually causes my students to look back with either deep awe or deep suspicion when they realize that even our choice of base 10 is a choice among many and we can make other choices.

As von Neumann said, very much something to get used to.
How about investing into their own browser in ways that actually improve the internet? Like adding IPFS support? Or PGP encryption?