skysight-inc/HackerNews huggingface dataset:
This is one of the most fascinating groups I've seen in quite a long time. Check out their YouTube channel too where they show details on the turbopump https://www.youtube.com/watch?v=p6BC1QfA0Ug
They have a regular police presence due to historical problems. Not quite an officer stationed there, but pretty close at certain times of day. Helps that there is a police substation next door. Calling wouldn't get an officer there any quicker, when one walks thru or past every ten minutes or so anyway.

There is a big cultural, uh, mismatch where the library requires more police intervention than any of the retail stores or bars or parks... liquor licenses have been lost for consuming far less police budget than the library. The library gets a free pass.

If all the policies were printed out from the web page it would be at least 100 printed pages. It is a very verbose CYA that boils down to anything you do that a librarian doesn't like will get you banned, and being there while banned is a legal trespassing offense, so one strike and you're out. If the librarians like you, you won't be banned no matter what you do. I can photocopy copyrighted materials, take pictures or videos of my kids, talk (whisper) on my phone, hang out for an hour while my kids take a class ... folks of a different race or economic group may have a somewhat different experience when they break any of those rules.

I was unable to find a minimum age, but I think you'd have to be at least upper grade school to survive not violating at least one of the hundreds of rules for more than a minute or two.

I did find that they define loitering as being in an area for longer than 15 minutes other than defined study desks, so no need for crayons or tagging. I've violated that rule a few dozen times, but I'm in no danger of being punished...

Given the sheer workload of homeless people and child day care, the librarians show quite a bit of restraint and can't enforce all the rules.
Axler's book is much more of a pure math book, in the spirit of an abstract algebra or analysis book. Strang's book is more applied, applications oriented, more mechanical in nature. Both approaches have their place, Strang is more suitable for engineers. I find Axler far more elegant, and his arguments generalize much more readily to infinite dimensions. I would recommend Axler for budding mathematicians and people wanting to study functional analysis and operator theory later on.
There are also billions of people that will never fly.
Depends on your goal.

If you want to learn a lot about development, write a lot of code, you can use flat files and treat them as a small database. Implement simple SQL analogues of WHERE, etc. It could definitely be fun to implement! A lot of educational value. You would learn more about designing APIs consumed by other applications, etc.

But if you just want something that would run on r-pi, you would be better off by using a standard database. Some of them are around for over a decade, written in C and thousands of men hours were spent on optimizing them. As long as you are not doing something a bit crazy (e.g. 3 fields in WHERE statement, non of them are indices), you will be just fine.
My understanding was that ANGLE was done so that DX9, 10, 11 could be used underneath for rendering while doing OpenGL -> DX translation, main reason being unstable GL drivers.

Nowadays, NVIDIA provides GLES2/3 apis, but not sure about AMD/Intel.
Do you people realize you don't need to have this debate from first principles? There's a LOT of interesting (and depressing) cost analysis on providing Sana'a with water vs. trying to relocate.

Not everything has to be a Fermi thought experiment.
I take it you've never been in a similar situation?

If you've ever dealt with an officer of the law in an adversarial situation where you believe you've done nothing wrong, it can be an unnerving or even terrifying experience. The power imbalance is immediately and palpably felt (what I think the author was trying to convey by mentioning the clearly-visible gun). If the officer had wanted to arrest the citizen (who, if he was doing something wrong, was doing it in good faith with the belief and understanding that his actions were not only legal but encouraged by the governor -- an unnaturally well-informed citizen for being a temporary visitor to the state), he would have been well within his rights to do so.

Is this some rogue cop enacting some personal vendetta against alternative hirecar arrangements? Probably not. But did the officer act unprofessionally? Entirely. Not answering the questions, throwing the license back at the passenger, offering a free ride to the airport (which may very well be inciting breach of contract)...and what will happen to him? Possibly a slap on the wrist.

The only way the police can justify the power they are given is by wielding it appropriately and heavily penalizing its abuses. I don't expect the former to happen 100% of the time -- we are fallible humans -- but when it doesn't, I do expect the latter. And I rarely see it.
You could have ended this comment at word #6
Of the roughly 750 million people who caught a plane in the US in the 12 months to April 2014[1], many of them will have paid a driver to get them to and from the airport.

Arguing that they shouldn't complain about crappy service or being harassed by authorities, because billions of others can't even afford a taxi is a pretty bad argument.

Person A: "We should be demanding that our authorities look more closely at the quality of water in our town. Having it contain high amounts of flammable gasses is not ok."

Person B: "But there's billions of people in the world who don't even have clean drinking water"

It doesn't invalidate person A's argument - yes, there's lots of people without drinking water or without the $100 to spend on two taxis. Yes, we need to do something about it.

We don't, however, need to completely disregard everything else until that problem is fixed. We're capable, as a society, of dealing with multiple issues concurrently.

[1] = http://apps.bts.gov/xml/air_traffic/src/index.xml
I don’t think the markup for `<video autoplay muted loop>` is an issue. These attributes exist for this use case.

That being said, video in CSS background is a legit feature request.
I don't know about now since I don't visit 4chan anymore, but the imageboards very clearly used a DB - during periods of high load one of the most common error messages was "MySQL connection error" which became a sort of minor meme for a while (this was several years ago.)

On the other hand the textboards do appear to not use a traditional RDBMS - they were running a modified version of Shiichan (http://wakaba.c3.cx/shii/shiichan ); Kareha (http://wakaba.c3.cx/s/web/wakaba_kareha ) is another popular textboard script that doesn't need a database.
Didn't know that as I only use one internal drive, no externals.
What is the purpose of this line of argument?

"Most people in the world can't afford taxi rides like this so don't complain about how the police treat it"?
I was confused about that term for a few moments. We should have a standard shorthand for animated GIF. How about aGIF or AGIF?
This.

Trains are faster than planes for short-ish inter-city journeys in many other places because (i) you can use public transport to get to the stations, (ii) you avoid the time spent on check-in and security check and (iii) trains are more frequent than planes to the same destination.

None of these is the case in Beijing. I don't know about other cities. I've taken inter-city trains from Beijing a few times. Each time, I've found the experience of getting to the station, and finding the right spot, more arduous than for international flights.
> Of course, in a perfect world, an officer would know everything about Colorado law. But that is clearly unrealistic.

Citizens of Colorado are supposed to know and obey the law and apparently citizens of Washington state are expected to as well, if they are visiting. Why is it unrealistic to expect a Colorado police officer to know the law?
+1 power imbalance. I had to listen to a cop tell me how shitty his day had been for 10 minutes once while pulled over for no reason.

To be fair, he had had a really shitty day, and was 23 hours into a work shift, but there was nothing I could do to exit the situation without causing a serious problem aside from listen and wait.

I listened and wait, comforted him, and then I was allowed to leave.
I'm in agreement that the author's words are a bit dramatic, but I can sympathize with his disposition. Police often use their power as leverage to put citizens in a stressful, fearful state (as to draw out a confession). It's part of their training. Some use it judiciously; others, unnecessarily.

In other words -- Better watch out, Colorado! The cops are out tonight, and they're giving you the shakedown to make sure your ride to the airport is 100% legal.

>>> The officer was just doing his job

Seems to me he was just trying to play detective.
> The results were presented at a one-day conference at ESA's European Space and Technology Research Centre (ESTEC), in the Netherlands, 21 March 2006.

It's not clear that this result was later published in a peer reviewed journal. The Wikipedia page about Eugene_Podkletnov ( http://en.wikipedia.org/wiki/Eugene_Podkletnov ) don't mention this work, and says that all this research field is very "controversial".
It's kind of weird that one of the most logical answers to the first question is not in the answer sheets. I bet that if it was there 100% of non-programmers would tick it, and not be wrong.

The question:

a = 10;
b = 20;

a=b;

The logical answer of course being that the computer should throw an error or return false, because a does not equal b. 14 years of schooling should have hammered that in quite thoroughly.

If you really want to test non-programmers native skill for working with computer, you should at least briefly explain how the computer will read this statements. i.e. the computer interprets the statements sequentially, and reads the '=' symbol as 'becomes', not as 'equals'.
I think it's always weird how multi-dimensional arrays are implemented in most C programming books. Do you guys really use a pointer-pointer approach to represent them? Because nowadays I always allocate a flat array and just calculate the indices. E.g.

struct dmatrix {
size_t rows, cols;
double *data;
}

and then a simple

double dmatrix_get(struct dmatrix *m, size_t r, size_t c) {
return m->data[r * m->cols + c];
}

is all you need? In particular I find explicit array sizes in function headers very contrived and I have never used them in serious code. Normally it's just a pointer and a length argument similar to e.g. read/write functions in the standard library.
Packed Pixels – An extra monitor for your laptop
>>> Not answering the questions, throwing the license back at the passenger

At the end of the day, cops are people. They get tired, frustrated, etc. I don't expect them to act like my personal servants.

>>> I take it you've never been in a similar situation?

I have, more than once. Actually, in a very similar situation.

I took a bus for the first time in that country, got the ticket, and didn't know that I need to get a stamp on it. No one told me. The bus gets stopped, tickets check. I am told "get off the bus, I will teach you how to use public transportation". OK. "Get in this van" "why?" "do it". okay, a bit odd, but will do. Feeling nervous, but didn't act like a dick self taught lawyer. Explained the situation, stayed nice and cool, I was told that it's my first day here, got $10 fine and took the next bus. Other passengers were acting like dicks and no one was nice to them.

Other situation. I got letter that I must come to police station, to explain some things. It was because I was writing a blog about poker and someone perceived it as illegal. I had to go to 'economic crimes division'. Again, nervous but staying cool. I told everything, I said that I'm just translating from Wikipedia, I am not getting anything back from it and I'm not promoting anything, stayed nice all the time, didn't question anything about law, etc. A month later I get a letter, that everything's dropped, I did nothing wrong.

Would I have questioned the law and etc, probably wouldn't have been so easy. But people were just doing their jobs and I didn't obstruct them.
Don't have any connection to these people. I don't know who they are and I wasn't interested in promoting their Kickstarter. I thought the idea of hacking a dumpster into a tiny house was a cool idea that's why I submitted the article.
There is no my or someone else's logic. There's logic. If you say it's ok that taxation not only sponsored the development of weapons that killed all those people, but they also provided some good things, then it's exactly equal to saying "my husband beats me sometimes, but he's also a provider for my family, so it's okay and we're working on the beating thing". No. Just no.

The alternative is free market and free enterprise, of course. I don't propose it though. I know people are very stubborn with the old ways. My only hope is that we are going to see no-state and free market in some places on earth and when people are going to see it's good, they're gonna copy that.
And the wrong way: https://www.youtube.com/watch?v=0_HUNQIAAR0

Starts at 1:10
The purpose of a headline is to attract the reader's attention so yours is not better. But you already proved that yourself by clicking on on title and reading the article.
> Is this some rogue cop enacting some personal vendetta against alternative hirecar arrangements?

The worst action movie plot line ever ...
18.06! Not 16.02. Sorry!
Happiness Revisited: A Household Income of $75K?
You shouldn't start a sentence with "no" when it confirms the sentence it's responding to.
Didn't the nuremberg trials teach people that 'just doing their jobs' does not exempt them from ethical decisions? So you have a shitty job. That doesn't mean you need to be a shitty person, prioritizing victimless crimes over actual crimes.
The Pickpocket’s Tale
Is it possible uber paid for this story? It seems to promote uber more than one would expect.

(After joining r/hailcorporate on reddit I'm seeing this stuff everywhere...)
I was about to say that, myself. The irony of asking this question on HN made me smile.

Note that they are (or did? or might be?) moving to a DB format in the end, but for at least the first several years of Startup/Hacker News, it was S-expressions written to files.
This clickbait was flagged off the site last night. Now it's back.
Viewers of Die Hard With a Vengeance have several opportunities for learning:

http://en.wikipedia.org/wiki/New_York_City_Water_Tunnel_No._...

50 years and $6 billion for a tunnel 60 miles long. The city owns lots of land around the source waters, but I think that is their only expense in acquiring the water, and the tunnel flows downhill to the city.

Also, the 21st President of the United States was Chester A. Arthur.
Besides, the police shouldn't try to enforce particular laws until they are confident about their understanding of them.
Show HN: Sense.js, a library for gestures on mobile browsers
> At the end of the day, cops are people. They get tired, frustrated, etc. I don't expect them to act like my personal servants.

You shouldn't expect a cop to act as your servant, but you sure as shit have an expectation that they will act professionally and courteously towards you. You also should expect them to not abuse their power. I don't give a shit if your dog died and your wife left you, if you are given a position of essentially unchecked power over me, you better use it judiciously.
I believe a new version based on JavaScript and iframes (sigh) is either out now or being deployed as we speak. Of course it sucks too (just less), but for different reasons: Recent posts on various forums have indicated that it uses something like 1MiB of JavaScript for what is basically a series of forms. The use of iframes is also kind of insane these days unless it's for branding/familiary-for-casual-users. The really weird thing is that official spokespeople have claimed that the iframe thing is for security reasons, which has me worried about what kind of security they imagine they can achieve in a compromised client. Hopefully(?!) it was just a spokesperson being ill-formed about the technical details.
A wonderful project. Thank you. I have forked it and hope I am time to contribute to it.
Phew! I thought for a moment I'd spent my weekend watching his second-best lecture series!
Yes but perhaps it should also be accurate?
Chemical Calligraphy [pdf]
More information about you? The contest? The teams? The idea? Shoot me an email mkremer90@gmail.com
Where in this article did the officer try to enforce whatever law it was he thought Uber was violating?
Did you just compare massive genocide to a police officer being rude?
>>> nuremberg trials

Himmler and a traffic cop is a pretty wild comparison, if you ask me :)
Yeah, but turning down a police officer's request for information is a good way to encourage him to find something illegal about what you're doing. There's a law that isn't on any books but is the easiest way to get in trouble by breaking it: Contempt of Cop.
Responding with "false" as the result seems logically incoherent, as it assumes that the first two lines of the the three-line program are "true" when there is no reason to assume that is the case.

Without any previous understanding of what computer programming is, what it does, or how it works, and relying solely on elementary mathematical learnings, is there a particular reason that one would assume that the first two lines are directives and the third line is what we are being asked to validate? I am too far down the rabbit hole to intuitively know if that is the case, can someone else suggest whether this is a plausible conjecture?
You can just assume that most muslims in the US are on special watch lists.
Computer Models Show What Exactly Would Happen To Earth After A Nuclear War
As far as SQLite is concerned, a Raspberry Pi is a very
powerful machine. There's no reason why you sholdn't be
able to enjoy all the benefits of flat files together
with all the benefits of a relational database.

Yes. There are reasons to avoid databases, but saving resources usually isn't one of them. Definitely not on a RaspberryPi where you have 256MB or 512MB of memory which is plenty for a lightweight database like SQLite.

By the time you're done reinventing all the things a storage engine like SQLite or one of the NoSQL storage engines would give you, you'd be hard-pressed to do it more efficiently than they do.
Refreshing to hear somebody talking about too much dead space filling entertainment. Contrast vs reality-TV and game shows where the pace is deliberately dragged down to a crawl.
How To Install Clash of Clans on PC Without Bluestacks
I think saw a couple of differentiators from Google's prediction engine. Would someone happen to have a more comprehensive view of how this is different from Google Prediction API?
Well, that's why it's confusing.
The breakdown (at 4:28) for each component of the turbo pump is fascinating. They do a great job explaining how each part works and how it contributes to the pump. Thank you for linking this.
Are the usage credits for YC startups only? We're in the BizSpark program and were planning to use Google Prediction API.
The formula for a viral headline is to start with an absolutely minimal description of the facts, and then add a bit of subjective/emotional language (like "things got really weird") so that the reader will have to read it to confirm if the subjective part applies to them or not.
Very nice writeup!

To finish the puzzle, consider the following comment in one open-source mp4 library:
https://github.com/l-smash/l-smash/blob/master/core/box.h

"According to ISO/IEC-14496-5-2001, the difference between Unix time and Mac OS time is 2082758400. However this is wrong and 2082844800 is correct."

MP4 stores timestamps by Mac epochs. The wrong value of the difference between Unix and Mac
epochs is wrong exactly by 24 hours and is hardcoded in the MPEG-4 reference software, from which it made its way into a number of libraries.

(I work for Google and have contacted the right people in the attempt to address this bug soon).
Allocation Styles
Thanks PG, You deserve every bit of success you get
I just wanted to say thank you to Paul Graham, for raising awareness for GAZA on your twitter. Real humanitarian. you deserve bit of success from Reddit to Airbnb and many more.
Fear of this kind of abuse is why everyone should know and exercise their rights in all interactions with law enforcement. If 90+% of people weren't willing to be pushed around, the cops would be forced to learn their legal limitations.
The better argument, I think, is that it is also unrealistic to expect citizens to know all the laws.

The theoretical answer to this is that citizens are expected to know all the major laws that govern everyday activity, and are then expected to educate themselves when they engage in a particular activity or line of business that a reasonable person would expect might be specially regulated about more obscure laws that might apply to that activity. Officers, on the other hand, have no way of knowing what sorts of violations they are about to encounter when they go out on patrol. I don't claim, though, that this is always true of fair in practice -- I'm just relaying the conventional reply.

And I think some perspective is in order: the officer's information was, at most, a few weeks out of date, and he did not attempt to actually enforce any Uber-related law. Also note what I pointed out in my edit: the new law includes regulatory restrictions that the driver may well have been violating.
I wonder if there's a market for online SICP course.
The value added being an instructor and guidance through the course.
The Grand Budapest Hotel on TripAdvisor
but you obviously can't check every domain in the TLD. A preload will still function, that's the whole point: make sure a MITM can't cut off the HSTS header.
I'm looking for some insight here. I read about situations involving poorly behaving police and the victims never think to call police dispatch and call over a staff Sargent or something like that

Sure, there's the 'blue code' thing but this seems to me that you have entered so much 'on-the-record' data and clearly demonstrated a wish for police assistance. What are the reasons that this doesn't happen?
> A country with a lower life expectancy will necessarily have a younger population.

This is not necessarily true. Generally the number for "life expectancy" that is quoted is life expectancy at birth, which is roughly the average age of people at their death. In a lot of poorer countries, this number ends up being driven by infant mortality (to see why, consider a country where, if you survive infancy, you live to be 100 years old, but 50% of all infants die - the "life expectancy at birth" of such a country would be about 50).

Generally, I think it's understood that the "youth" of a population is a sort of measure of adult life expectancy. Though I suppose it can also be a measure of the birth rate (weighted by infant mortality) across countries. I think the two factors end up being fairly intimately tied to one another (likely by a third factor, wealth), so it's not absurd to conflate the two.
I'm pretty sure there's a scope to those agreements.
I went to a lecture with one of the founders. They are indeed fascinating and quite capable people. Not only have they built an actively guided rocket and launched it up to 8km, nearly vertically, but before they started Copenhagen Suborbitals they had already built several submarines (including one that had a toilet _and_ shower) all of which where quite seat-worthy.

They built them using very little money, because they didn't have that much forexample to make the g-test for their rocket they borrowed a free fall attraction in a local amusement park.

Copenhagen Suborbitals truly have the hacker spirit.
There should be a name for this ridiculous argument, so we can just name it and dismiss it.