skysight-inc/HackerNews huggingface dataset:
I've been using BetterExplained to review concepts I thought I mastered (based on great test scores and grades) but years later realized I had zero intuition on. It has been, by far, the most useful single source of math content I've found on the internet. The world needs more people like you.

Two Questions:

1) What are your thoughts on interactive content like ExplainedVisually? I've been thinking about doing something similar for data structures / algorithm topics. How much of learning math concepts is exploratory vs learn-by-doing?

2) Are you running BetterExplained as a side business, or full-time? And if you're willing to share techniques and numbers for the entrepreneurial HN community, what are some things you've done to market it, monetize, etc and what were the results?

Thanks!
Ride sharing in aviation is perfectly legal, the FAA isn't interested in the commercialization of ride sharing in aviation. However there have been websites offering that for many years, none are popular. Whoever thought of suing the FAA for something that is already legal... probably listening to an investor who didn't want to invest unless if it was given the FAA seal of approval...

http://www.risingup.com/fars/info/part61-113-FAR.shtml
Sec. 61.113(1)(c)

This is a good article on this http://speednews.com/article/6966 (2011) essentially two people have to be intending to go to the same destination, the passenger can only pay half the costs and the pilot has to pay the other half since he/she is going to the same destination anyway.
I would love to have a job where I got to try to break through all the TSA's nonsense security.

If I believed any of it was making us safer I'd happily comply, but the whole process is so ham-handed it's embarrassing.

I brought a small radio transceiver with some coils of wire through recently and the look on the agent's face when he removed it from my bag was "oh shit I've found an explosive device". He looked extremely relieved when I told him it was a radio (but didn't inspect it further), then he proceeded to lecture me about the importance of putting my toiletries into a zip lock bag (they were in a similarly sized see-through bag with a zipper)...
> REST style routing interface

I'm fairly certain there is no such thing, and parsing parameters out of the URL path has nothing to do with REST either.
Ask HN: If we had Einsteins browsing history
If Einstein had used the Internet and if we had his browsing history, would it be studied & publicly released?
Zero based budgeting is good for so many reasons... And this is one of them.
> After going through the article I would have really liked to see what the average prices for these companies are

Seeing as how the services they provide will be so different, would it really be a relevant number?

Even then, how would you calculate it? The average of each company's lowest price plan, or the average of the average of each company's plans, or the average per-user price, or…?
Well who am i to doubt? I have never attempted contemporary tactics nor seen them in action. What i have seen is what has worked in the past because we are still animals (including myself) despite all the incredible tools and knowledge we have. Do you have use cases? I think this an incredible thing to explore.

I can tell you think im insensitive. I appreciate you punishing my behaviour with stern talking. Clearly even you see the benefit
Hot real estate and design inspiration
Bitbucket. Free unlimited private repos.
Not sure how you're getting that from what I said. I didn't mention evangelism at all?

Why would you not include that in the "being good enough" part?

I wasn't just saying that "being good enough" isn't enough. I was saying that no one (except Christ) is good enough. That one cannot, of oneself, earn or achieve justification, but that one is given justification, that one cannot deserve, as a gift.
A library to standardize job board API access and data in PHP
I've always wondered about this: is the machine physically incapable of blasting you with a stronger dose than it's supposed to, or is that software controlled? Because there is no way I'd believe the software on that thing doesn't have a bug.
True. He's the one we truly worship now. We have for decades. God bless our favored corporations that enable consumerism. Merry Christmas! And to all, a good night!
Definitely. But this was a quick fix due to its nature. It's possible that they know their original values are good, and this is therefore the smallest change to quickly get this out of the hands of... whoever had it. Of course, I think we'd all like to see it ripped out entirely, but that is a larger change that would need some time and care taken over it. Hopefully this is what's going on...
http://research.microsoft.com/pubs/259290/GraphView%20User%2...:

CREATE TABLE EmployeeNode
(
[ColumnRole:”NodeId”]
WorkId varchar(32),
[ColumnRole:”Property”]
Name varchar(32),
[ColumnRole:”Edge”, Reference:”EmployeeNode”]
Colleagues VARBINARY,
[ColumnRole:”Edge”, Reference:”ClientNode”, Attributes: {credit:”int”, note:”string”}]
Clients VARBINARY
)

=> they also appear to replace "many rows each with key and a single referenced value" by "row for each unique key with packed values for that key" (possibly with multiple rows for a key if the packed data doesn't fit in a VARBINARY(MAX))

So, the database structure looks a bit like an inverse index. That could speed up some queries.

I have been playing with something similar in pure T-SQL, using a cross apply over a table-valued function to get from this packed format back to the normalized table, but wasn't impressed with its performance. Using CLR was next on my list, but I haven't come around it because I don't have high hopes that it will perform, but I may try this.
A monument larger than any other except those in Egypt and Babylon
This is not something that can be "proven" in the sense that all early calendars had drifts that had to be "manually" fixed over time. But we know that the Roman year started officially at the Spring equinox, so that was a calibration point [1]. The first serious attempt to fix the calendar was done by Julio Cesar, but by then he was stuck with the Winter Equinox at Dec 25th (our traditional date for Xmas). When the church introduced the Gregorian calendar their goal was to go back to the dates established for Easter around the year 300 CE, that's why they decided to jump ~10 days in the calendar.

[1] https://en.wikipedia.org/wiki/Roman_calendar#Calendar_of_Rom...
I don't agree with your assertion.

Background checks ( of the TSA's depth ) don't reveal if a candidate is susceptible to blackmail or coercion, so physical checks are always a good idea.

After all it's not who you are but what you possess that constitutes a threat.

So what is the point of pre-"clearance"? Revenue, I suspect.
I found that Zite did an incredible job of presenting high-signal content for me. I became so reliant on it that I would have paid a significant amount to subscribe, probably on the order of a spotify subscription. But that was after years of use and training; I can't imagine anybody selling me on a curation service at any price without that experience.
Thanks aestetix and crymer11, I actually saw that part but the title makes it sound like TSA can force everyone to do AIT screening. The text doesn't support that, though.

> "... TSA will nonetheless mandate AIT screening for some passengers ..."

Okay, so some passengers ...

> " ... as warranted by security considerations ..."

... assuming they have a reason to, basically.

Don't get me wrong. I loathe the TSA, think that the imaging stuff is bullshit and a violation, and I "opt out" every time I fly. The title, though, makes it sound as if everyone will be subjected to the screening everytime they fly. I don't think this document supports that claim.
> surely there’s got to be more in our future than just chasing incrementalism — walking the incremental iPhone walk, two steps behind.

You wait for something you see a lot on here a "paradigm shift".

Incremental improvements over the incumbent rarely displace the incumbent (unless they do something crazy).

If the desktop had stayed the primary computing device most people interacted with Microsoft would still have a complete lock on the entire thing, Smartphones and Tablets as mass market consumer devices disrupted Microsoft's monopoly by forcing them to compete in a world with devices not running their OS.

I doubt anyone will beat Apple at making a better smartphone in the short-medium term (I use a Nexus 4 but that was purely a cost/good enough decision) but I wouldn't bet against something coming out that creates a window, if I had to hazard a guess I'd say something like VR/AR in a consumer friendly package at an affordable price but you'd still need some kind of hardware to run the unit and I think a Smartphone is the natural fit for that so maybe the phone will stay central longer than I expect.

What I'd really like is something about the weight of the specs I wear for screen work, that has intelligent feeds that I can customise for what I'm doing, if you could overlay video and such on top of that you'd really have something.

I regulary repair my roadbike and sometimes end up using youtube videos for instruction, having a small "HD" screen I could have in vision while I'm doing that would be incredibly useful, or the ability to pull up a shell and view some text wherever I am (server misbehaving or whatever).

That's something I'd pay £300 for.
Before I opted out of body scanners, I thought of this whenever I was in one:

https://en.wikipedia.org/wiki/Therac-25
Hmm, Medtronic says my wife shouldn't go through the scanner with her insulin pump ... http://www.medtronicdiabetes.com/customer-support/traveling-...
Now you can do it yourself haha ;) I still have to cleanup the code a bit. Thinking of creating a class which allows you to create such image by just writing a multidimensional array, so less code to write. But I couldn't wait to share this already so... But updates are coming soon.
Not storing the images was the promise at the beginning. Thanks Obama for these scanners, by the way. IT was bad enough that Bush made the TSA, Obama made it worse.
I don't understand why Cascading is missing. It's by far one the easiest batch flow controllers on the platform. You can test it is memory locally. When you deploy to a real cluster, you know it will just work.
The original article has the correct images:

$ curl -s http://www.fishtrap.co.uk/black.jpg.coll | md5
b69dd1fd1254868b6e0bb8ed9fe7ecad
$ curl -s http://www.fishtrap.co.uk/brown.jpg.coll | md5
b69dd1fd1254868b6e0bb8ed9fe7ecad
$ curl -s http://www.fishtrap.co.uk/white.jpg.coll | md5
b69dd1fd1254868b6e0bb8ed9fe7ecad
A number of states, including California, require accrued vacation to be paid out in the final paycheck: http://www.nolo.com/legal-encyclopedia/layoffs-plant-closing...

Unemployment is covered by taxes paid by the employer. You should absolutely collect it if legally allowed: https://www.irs.gov/Individuals/International-Taxpayers/Fede...

Additionally, California has additional protections for workers, such as requiring immediate payment for all wages, including accrued vacation, upon termination: http://www.dir.ca.gov/dlse/faq_paydays.htm
Many people cook with creativity, just as many people program without creativity.
My favorite subject is mathematical modeling. But that's require a lot of code and I quite enjoy programming.
Dreamcast 2 Reportedly Under Development, to Be PC-Console Hybrid
I know, especially the full screen shortcut.
Buffet no, but Paul Allen has invests in space (SpaceshipOne, and Vulkan)
Re: your disclaimer: thank you for posting this. We need to leave room for people who are cautious in reasonable ways, as you are describing.

When our child was born in 2002, there was a lot of 'buzz' about the dangers of vaccinations. Most of it we were quickly able to filter out, but there was a body of research that had strong correlations between lower incidents of a whole variety of early childhood problems in '1st world' countries that didn't vaccinate as early and aggressively as the United States, such as Japan and some part of northern Europe.

We decided to not vaccinate until our son was five years old, an age when he was getting into more crowded social situations. And he has been current ever since.

We weren't 100% convinced that the broad spectrum and very early age vaccinations in the United States were a problem, but we weren't convinced otherwise. At the same time, we knew that vaccinations are an absolutely critical part of modern society.

Like you, we made some conservative BUT WELL REASONED decisions regarding our child.

That kind of middle of the road thinking needs to be way more commonplace.

Sorry for totally hijacking your post. :)
Common ground for independent workers
Consenting people, using private property in compliance with the law. Why exactly is this banned, other than it cutting into the pocketbooks of carriers?
Back when I ran a consulting/web dev biz I had a client who came to me with an idea like this. I didn't like the sounds of it and didn't pursue it. Glad I didn't. There's a myriad of technical legal issues to go through. Uber ("rideshare") vs taxis are majorly different from Flytenow ("flightshare") vs commercial airlines.

The FAA will never allow "flightsharing" on the commercialism that Uber is at. It's simply too dangerous.
How to Create the Perfect Cofounder Agreement with Your Business Partner
My recommendations...

For automated cluster building - https://ambari.apache.org/

For analysing your data, dynamically building queries and sharing this with other people in your company - https://zeppelin.incubator.apache.org/

And coming soon - https://www.zeppelinhub.com/
Calling it "AnalProbe Data Collector" might have reduced sales.
What level of physical checks are you willing to be subjected to in the name of fake safety to travel freely?
> After all it's not who you are but what you possess that constitutes a threat.

Then why have a background check if it's ineffective?
In October, I also triggered the machine for having a suspicious back.

The cause? I was in Hawaii, wearing a backpack. If you didn't know, their airports are mostly open-air. Of course, Hawaii is pretty warm and it was humid, so I was sweaty on my shoulders where the straps were.

Win for security (theater).
I wanted a "full" CMS and a GUI, and it looks like finally I got one now. I hadn't seen another static generator that had a GUI of any kind (that seemed to be supported.)
That just kept re-directing me to enter my email. I was never able to opt-out
Interestingly, my wife got Pre and I did not but now whenever she books things for the two of us, I also get Pre. I figured they'd kick me out when they scanned the pass, but it has worked now at six different airports.
I'm a huge iPhone fan, but even I have to admit that the core premise here is a bit far-fetched. The other phones are not trailing the iPhone, they're leading it. There's not a single feature (maybe force-touch?) that my Android friends have not crowed about having long before it finally arrived on the next iPhone iteration.

Apple is doing here what Microsoft did when they were in their prime. Let the other guys experiment with a ton of random features, and then wait, and copy the best features from the last batch, but make them a little better.
It's idiomatic style in the K community, e.g. here's a random source file from kdb itself - http://code.kx.com/wsvn/code/kx/kdb%2B/c/c/odbc.c

Some members of that community prefer this style because they find it more readable.
> I have TSA Pre via DHS/CBP Global Entry, as does my wife

So you've explicitly supported this totalitarian theatre. It's never too late to apologize.
It always saddens me when I hear of adults closing off conversations with children (and in this case in such a dismissive manner). Adults really should realise that they are constantly teaching children, or rather, children are constantly learning from them. What did this exchange teach?

A better approach is to keep things open - for example, respond with something along the lines of "how do you know?" (or even just "why?"). The you get to talk about seasons and how they relate to temperature and weather, leaves on the trees, snowmen...
But that's not what parent claimed; parent claimed that US democracy mean the US wasn't a passive polluter.

But since you're here: what's the US GDP per capita, compared to other less polluting countries?
That's just what they claimed. They did, in fact, store the images: http://www.wired.com/2010/01/airport-scanners/
Well, the purpose of the code is to use it in mail clients. And because mail clients don't allow you to use javaScript and such, using an image is the most obvious alternative.
If you download the files to disk, you'll get the right values:

$ curl -s https://blog.cloudflare.com/content/images/2015/08/white.jpg > file && md5 file
MD5 (file) = b69dd1fd1254868b6e0bb8ed9fe7ecad

I've seen this same sort of thing happen with curl in other contexts, but I've never tracked down the details. I assume it has something to do with file stream handling in certain versions of curl. You'll see a discrepancy if you look at the output of piping to 'wc' vs. examining the downloaded file.
Java puts strict naming standards on your files to pull that off, although to be fair they are standards you should normally be following anyway.

IMO the fast performing code is best in the IDE's compiler, since that is even faster than a build in most cases.

Overall I think the .NET whole assembly building is at very least an interesting industry level example of something different that the common per-file build model used.
If the author is present, I recommend putting a clickable TOC at the top that takes you to the relevant section.
Much of this pollution has very little economic benefit in the short term and massive downsides in the long term. The real issue is corruption means it's cheaper for polluters ignore the problem than implement even cheap mitigation strategies.
I'm in Beijing this week. The pollution here has to be seen (and felt, as you breathe) to be believed. I'm not surprised that all sorts of technical solutions are being discussed, just because it's so crazy terrible. Whether such proposals (such as a mist cannon) is a real solution is a good question, but it's worth trying lots of stuff.
It it ever actually faster than https://en.wikipedia.org/wiki/Smoothsort
?
Follow both #space and #astronomy (and related) on Hubski.

https://hubski.com/tag?id=astronomy
https://hubski.com/tag?id=space
Web developers just shouldn't ever try to fight the useragent.

If you find yourself trying to "fix" a UI/UX in the browser itself, stop.

I don't care if you want 300ms faster clicks on mobile, or to force smooth scrolling in chrome, or to hijack right click for your sharing stuff, or whatever.

You are breaking stuff trying to do those things, and it's ruining my experience on your site.
Software "with no upgrade path" that hasn't been proven correct relative to a formal specification and deployed in an appropriate context (sufficient conditions to consider it a "not software" black box) should be considered a mistake and the responsible parties should be held accountable for reparations. Complacency with its continued existence is unsustainable.

Obviously this is an idealistic "should", but we need to take every available step to move towards this stance because a policy of limiting the networked universe based on the worst common denominator client results in an inescapable black hole of technical debt.

Open-source software plays into this model beautifully because it makes it much easier to propagate improvements across the entire space of systems. There remain some problems such as langauge interoperability ("best implementation of protocol X is in language Y but our system is written in Z and the Y-Z interop story is bad") which I'd like to see people give more attention. We need to address the quadratic workload of porting/binding every library to every language.
> Meaning the sidebar has to follow my finger, at 60fps, as I quickly swipe in and out. If such a thing is as easy you claim then a quick demo should be easy enough.

So what you want to do is to install a touch event handler and adjust a transform. Assume that the sidebar is pre-rasterized to a layer via will-change.

In this case, the DOM manipulation is going to be 1µs or so. Style recalculation, 1ms at most (this is a huge overestimate). Layout is skipped since you are animating a transform. Paint is skipped since you're animating a transform, the element is layerized, and all tile contents are cached. Compositing, 3ms at most (also probably a huge overestimate). Even with the most pessimistic possible numbers, I can't get anywhere near 16ms for this workload.
Sure, but you apparently know nothing about this topic, not even how to vet whether a source is trustworthy or not(Not that there's anything wrong with not being an expert on body builder steroid habits).

Perhaps it should be on you to not just post random statements you find when you have no means of judging the accuracy of the statements.
Sort of... I knew I would get downvoted, mostly because of my failure at SpaceX cheerleading ;)

I actually agree that SpaceX did an awesome thing, and really do understand that its more complicated, and difficult, and challenging, and so on, than what Blue Origin managed to do; yes. My point was more of a "HN loves SpaceX and cannot acknowledge that they might not be the best in the world at everything, ever" thing, rather than any technical breakdown. I would also maintain that the 100km altitude flight is important - it's the internationally recognised boundary of space - and that the 'first' that Blue Shepherd claimed was valid, since the SpaceX Grasshopper did not cross the 100km Karman line.

The important parts are that the flight is of a 1.) reusable, 2.) VTOL, 3.) rocket after a 4.) 100km altitude space flight. Since all four points are valid for SpaceX's Falcon 9 first stage booster, I think it's technically correct to place its landing in the same category as Blue Origin's New Shepherd landing. SpaceX's achievement is more technically interesting and useful, but that should not detract from what Blue Origin managed to do with a much smaller team and budget.
I would pay for a quality printer. Something along the lines of Epson EcoTank, but it's going to take some time to heal my printer wounds.

The printer needs to be well built. The printer needs cheap ink, and no chipped cartridges, the ability to use generic ink, and ink cartridges that don't dry out. Then, and only then will I spend a lot on a printer.

The printer industry seems to have shot themselfs in the foot while being clever with chipped cartridges. People realized they don't need to print? I have a Epson r2400 collecting dust. I just got tired of paying over a hundred dollars for their pricy ink.

I am now so used to not printing; maybe I'll never return?
I don't buy the "dangerous" argument at all. Show me the danger.

edit: I'm referring to the danger of adding a passenger to an already scheduled flight by a private pilot, which is what I thought this flytenow service was about. (Assuming there's not a weight issue and someone isn't trying to intentionally crash the plane...)
It's banned because the general public cannot assess the risk of private flights, and the flight is not under an AOC.

The FAA maybe a lot of things, but they're 100% right about this.
Why on earth would they make the chart at subject a compressed jpeg?
Developed as an educational tool for the
San Francisco Bay Area Renters' Federation

The SF BARF? Seriously?
Thanks for reminding me of SDF community!
I assume the toxic waste catapults aimed at Tibet would be next.
They probably just have a well-planned contract.
It reminds me a lot more of something like Intel's IPP libraries[0]. Except the documentation seems to be quite a bit more opaque than either OpenCV or IPP.

[0] https://software.intel.com/en-us/intel-ipp