skysight-inc/HackerNews huggingface dataset:
> However I've had trouble finding the people who find rote formulas a better way to learn.

Strang's lectures don’t just give you rote formulas. Most of his lectures he clearly shows you where things came from (i.e. how and why Matrix Elimination works, etc...). One of the reasons why he shows the different ways to multiply matrices in this lecture is because he uses it in subsequent lectures to show how null-spaces and column spaces work.

His lectures are not the be-all and end-all to linear algebra, but (IMHO) it gives you a great intuitive feel for linear algebra. Also remember that his particular course (18.06) is focussed on engineering students who tend to do less theoretic proofs than maths and natural sciences folk.

I personally like to get an intuitive understanding of how things work before delving into theory (maybe it is just me). I am currently (slowly) busy with a textbook called Linear Algebra (by Friedberg, Insel and Spence). This is a great textbook that shows you how matrices are defined from fields, etc… (i.e. theoretical). Yet it would be extremely difficult to understand without having an intuitive idea that Strang’s lectures give you.
I'm not so sure, given the article as written. Comparing Earth and Jupiter:

1. made up of about three-quarters liquid water

False for both. Possibly true for Earth if you're talking about surface area, but that's a pretty generous interpretation of the article as written.

2. with a solid core of iron and nickel

Likely true for both. ("At the center of [Jupiter's] rocky core is probably a metallic ball of iron and nickel, just like Earth's core." http://www.spacedaily.com/reports/Jupiter_Has_Large_Rocky_Co...)

3. an atmosphere of hydrogen and helium

True for Jupiter, not for Earth.

That's 2 of 3 for Jupiter, 1 of 3 for Earth (or 2 of 3 for Earth if you're being generous). Mars sounds a lot more like Earth than GJ 1214b does, based on the article.

GJ 1214b might be more like Earth than any other known exoplanet, but given the murky reporting it's hard to tell.
I find it fascinating that this Clojure implementation is faster than the current best Java one. I wonder how much faster a Java implementation could be.
>>I wouldn't jump to conclusions based on couple minutes of Google search :-)

True, HRW and Wikipedia are just Western conspiracies -- just ask any dictator! :-)
I like the very end of part 2, (http://www.c-spanarchives.org/program/290734-2) where Michael talks about the "Guide to putting TV on JTV" that was introduced into the record. He was all: "If you used this guide, you would not be streaming TV. This is totally for people trying to stream XBox and PS3 games"
> I don't understand what's so interesting about MIT's linear algebra course

The lectures are free to download (which is awesome to 3rd world folks like me :) )
From the chair, welcoming Michael: "an amazing young man...we recognize his talent"

Michael then does an excellent job outlining the company and, most importantly, the purpose and vision behind the Justin.tv product.
Ask YC: Best iPhone Development Book?
Which is the best iPhone dev book? I am coming from Rails and already figured out how to write a simple app and use xcode, and watched the peepcode screencasts, so nothing super basic.
WOW! Nice biz model and killer implementation. I wish you guys luck, but it looks like you may not need it. I'll be ordering a couple of these.
Quite the contrary, I find it fun to reverse-engineer silly corporate profiling. (Gee, I just told HN how to get free pool admission :-)

It probably got to me because I have traveled extensively and came up against these little schemes left and right. Greed pays their rent, but it's not my responsibility to just accept that and let them have their way.

Someone at Haagen-Dasz is gonna see the internet echo-chamber that their homeboy in Delhi has caused, and I promise you his little sign will be down in 24 hours, and on the menu might be new flavors named after Gandhi, Nehru and Ambedkar gee.
Although not totally related to the article, I wonder if the writer sees a direct benefit of biking on his business. I
started a fitness program a few years back and I've noticed several benefits:
increased energy, clear thinking and team building.

While developing my first company physical fitness was a low priority. I told
myself there wasn't time, I had to devote every minute to the startup. Worse I
ate convenient foods (pizza, subs, fast food) to help save time. I put on body
fat so fast that I got stretch marks on the side of my stomach. I'm not sure
what my body fat percentage was back then but my body weight was 215lbs and I'm
6'0"/180cm tall.

To loose some weight, I started to get active, and I noticed benefits in my
work. My mood was better, I could think clearer, and I had more energy. I began
a weight program and started playing Ultimate Frisbee regularly.

My friend and I are in the midst of starting another company (http://igeejo.com) and I hope to
build the cardio and weights right into our schedules. Getting the group out
for a game of Ultimate, assuming there are no pressing needs for the startup of
course, has a lot of upsides. It's great for team building, a great cardio
workout, and a chance to socialize a bit with other friends and significant
others.

Like anything in life, I think it has to be sustainable. I think
setting aside 3 hours per week will pay huge dividends in the future.
gets fun once you start going into vector spaces..
While that would be cool, it doesn't seem very pragmatic. I think I'd rather have control over exactly which version is chosen (where I can use implementation details in making a decision), rather than have it decide automatically based on claims expressed in the library metadata.

though we still have to specify a version, and keep up to date on what version supports what, so its hardly automatic for the dev or packager

I think the common case is for new development, you'd most likely develop against the most recent release version, but you don't need to keep up to date on which version supports what because you can continue to use the old versions with long-since compiled binaries as long as it can be installed along side the latest version. I think people and distros, in general, are too quick to remove older versions from being installed (or even available), which increases the on-going maintenance requirements of still popular binaries.

On the other hand, during transition periods, distros have been pretty good about this, like the libc5 vs libc6 transition, and by providing compat packages. But this has mainly been an issue with closed source abandonware (Skype for a long time was still using OSS and needed an ancient version of some audio libs).
This amusing reflection strikes me: Said managers may likely have the exact same feelings, e.g. "barely one-fifth (21%) of managers are truly engaged in their work, in the sense that they would go the extra mile for their employees. Nearly four out of ten (38%) are mostly or entirely disengaged, while the rest are in the tepid middle."
Then why not stop including insults with your technical criticisms?

If you include insults, purely stylistic criticism, and valid technical criticism all in an orgy of excited and angry words, people aren't going to take the time to dissect the actually interesting bits.

And, let's not forget, you're the one who claimed that jQuery and Prototype fail horribly on JSLint without providing any information on the actual errors, so the burden to prove they are not just style errors is still on you.
There's definitely some real world trolling at hand here (although I don't know whether it comes from Haagen-Dazs, from the journalist, or from both of them).
"It's time to face facts: San Francisco is spectacularly mismanaged and arguably the worst-run big city in America. This year's city budget is an astonishing $6.6 billion — more than twice the budget for the entire state of Idaho — for roughly 800,000 residents."

That comparison is so disingenuous. They're comparing a city with one of the highest costs of living in the country to the second poorest Western state? The cost of living in SF is about double that of Idaho. The median value of a home in SF is $656,700, while in Idaho it's $138,190. So why the "astonishment" at SF's budget being only twice that of Idaho?

Then there's the population issue. The whole of Idaho has 1.5 million people, while SF alone has 0.8 million. That's a huge concentration of people in one city. Compare SF to Boise, the largest city in Idaho: SF has 4 times the population. That kind of concentration of people brings lots of problems just by itself.

I'm not saying SF doesn't have problems. It clearly does. But this particular comparison isn't exactly the fairest they could have come up with. How about a direct comparison between the budget of SF and, say, NYC?
Sigh the milking of the open source. I wonder how much milk git has left to give to entrepreneurs.
He really does a great job, though the captioners got his title wrong (he's the CEO). I skimmed through and watched for when Michael comes back again at the end. By this time, his facial expressions show that he also knows he is kicking ass. The person on the House panel makes it clear that they aren't going to take any action immediately as long as Michael is willing to work with them to prevent piracy, to which he readily agrees.
Last year this time, A Hong Kong TV station did an investigation report on how much "chocolate" was in the store packaged Christmas chocolate presents. It was mostly wrapping.
Cool, so they kinda snap onto the back. How thick are the cases?
To demonstrate that spot pricing is a CORE competency you would need to show that it is applied ACROSS their businesses. Where's the evidence they use it much in books sales, music etc?
Nature journal articles in question (you'll almost certainly need a university account to see these):

Melanoma: http://www.nature.com/nature/journal/vaop/ncurrent/full/natu...

Small-cell lung cancer: http://www.nature.com/nature/journal/vaop/ncurrent/full/natu...

Erin Pleasance is the first author on two Nature articles in the same issue. That is insane!
Point out what you think is a valid technical criticism in the code review at the top of this thread. I'll respond to it.
Great illustration of the fact that ideas are generally not unique -- and that it is the execution that matters.

In one of his essays ( http://paulgraham.com/ideas.html), pg talked about the fact there was no such thing as a million-dollar idea and that "The fact that there's no market for startup ideas suggests there's no demand. Which means, in the narrow sense of the word, that startup ideas are worthless."
Everyone here is obsessed with being tanned.
Anyone figure out how to actually use Pastrykit to hide the address/nav bar?
"make something lots of people want to pay money for"
Hmmm.

reMail seems interesting but I wonder what the chances are of Apple adding those features to their mail client and then simply locking reMail out of the App Store for duplicate functionality?

Xobni came to mind as someone who seems to have done something similar (remedy limitations in an existing implementation) but they weren't so very much at the mercy of Microsoft.

I'm also wondering how the economics of reMail will work out. The Redlaser article on the HN front page from today says they've had 750k downloads (albeit at $2 versus reMail's $3.99) but reMail seems more of a niche offering. Even assuming they near that amount, at $3.99, is it really a sustainable business model? I guess there's scope to upsell some other monthly services in there.

I also have to chuckle at $4.99 being considered 'premium'.
Sometimes people laugh when I say that I attribute much of my success in the workplace to my participation in running and cycling competitions. There are very few other factors I can point to that have had such a dramatic affect on my attitude towards not just work, but all of my pursuits.

At the most basic level, training and competing promote intense focus, dedication, perseverance, and hard work in general. Running my first marathon, I hit an enormous wall around the 20 mile mark, and all you can do is put your head down and keep grinding. Although it's not from physical strain, I get that same feeling during those super long days of work, when you're just totally exhausted and feel like you can't go any farther...and then you do.

Running or cycling are great for their health benefits alone, but if you get serious about either (or anything related), I think you'll start seeing a surprising number of parallels with your professional life as well. Even if you don't get serious about it, and dedicate only a handful of hours a week, it's still an amazing way to clear your mind.
Adding Value to Your Certificate Folders
Folders are highly useful products. They are found in almost every corner of the world. They are a great source for document management. Marketing and advertisement are also some of the purposes that these folders can serve.
All Medicines Are Poison
Infographic: A Patchwork Nation - American Communities in a Time of Change
Using indexes in Rails
The End of Chimerica
Apple make money off people using reMail, I don't see them removing it to add the features to the native mail.app but who knows with the app store.
> Under communist command, russia rised to the status of superpower.

The Soviet Union was an energy superpower. They used this to built up their economy (and waste money on arms).
I just ordered one. This is a great idea! I really like the flash tool that helps you place custom artwork on the case. The checkout process was very smooth as well.

That being said, there's a problem with the custom artwork process. The vast majority of my photos are landscape, and these simply don't fit well onto a case. I had to photoshop one of my photos to add some extra sky onto the top in order to graft it onto a case. Any landscape photo taken with the rule of thirds will have this problem.

This is compounded by the tool, which has a nasty looking warning if you fail to fill the entire print area with your photo. There's nothing in the FAQ about the "print area", and none of the photos show the front of the case, leaving me completely in the dark about how serious an issue this is.
To find out what it's made of, they are thinking of using spectroscopy.

To find out the density, it's mass over volume. They infer the mass by the planet's distance from its star and by its orbiting speed, and they get the volume by the amount of light it takes away from the star when it pases in front of it.
gitk / git-gui works fine for me whenever I need it.
Accurate as your observation may be, sadly ToI is the largest circulating English daily in the world.
I thought the article said they looked at how the stars light was dimmed by the planet. They also managed to do a spectrum analysis?
In Africa a lighter skin is preferred.

You can say it is racist and whatnot, but then again, people in the west prefer a darker (tanned) skin.
Dan Nocera on Personalized Energy
I really liked "Beginning iPhone Development". There is a new version now for 3.0 called Beginning iPhone 3 Development, which looks at least as good as the first one if not better. Here's a link to the book on Amazon http://www.amazon.com/Beginning-iPhone-Development-Exploring...
Working on the right thing, Part II
Actions speak louder than words. And it's a two way street.

Engagement may be a valid measure (if somewhat abstract). But I've heard an awful lot of lip service paid to it, by the same people who are saying no not just to pay increases but to upgrading that three year old computer or otherwise providing an environment conducive to actually getting the work done.

When you're young, you try hard because the prevailing social message (at least in the circles I traveled) is that hard work pays off. After you see enough with your own eyes, you may either "check out" or learn to be much more discriminating about where and when you apply your effort.

I've had a few genuinely good (to/for me and my work) managers. Unfortunately, sooner or later, they all seemed to end up fighting the tide. That may be a reflection of the macro-economic changes going on in the U.S.

My one bit of advice is not to stay in such circumstances. If you can afford to, walk away. To the extent you can, try to keep your life structured so that you can afford to do so when needed.

Management is the aggregation of work effort. If bad management can't attract any work effort, it will die off. Another reason to avoid monopolies -- so that they cannot set themselves up as the only game in town.
"... Also .com.au requires a business number to register. There are other restrictions too. Similarly .asn.au can only be registered by non-commercial organisations. ..."

Thanks to kre (Kevin Robert Elz) ~ http://en.wikipedia.org/wiki/Kevin_Robert_Elz you cannot get a ".com.au" domain name without having a registered business name. The idea was to stop domain name speculation ~ http://www.passioncomputing.com.au/Articles/Australian-domai... Good in the short term when one person was administering domain names, not so good now as it adds extra overhead for a ".com.au" small market.
I don't know if the Author has ever been to Milwaukee...
I see, I was reading "A company is responsible for its contractors and... their actions" in much broader terms, like "contractor builds parts using child labor." Thanks for the clarification.
TED Talk - Alexis Ohanian (Reddit): How to make a splash in social media
> As did Nelson Mandela.

Yes, and he was imprisoned for it. But what made Mandela great is that he changed and became a reconciliation figure.

The young MK starter and ANCYL member did not deserve a Nobel Peace Prize. But the Mandela in 1991 did.
In which sense do you mean it? That they are repackaging someones code and milking them? Or do you mean that git is being abused by people looking to make a profit?
So what you're saying is that first there's a period of "proprietary extension" which we should shun because that's evil incarnate, then one day someone flips a switch and it becomes a standard and we mock the people left behind. [I don't meant that's actually what you write. A more figurative "you" with a generous interpretation of "anyone promoting HTML5 today].

For many years now, the rallying cry of the web has been "industry standards". But now, suddenly, we have redefined standard to be something like "Google said so". Sometimes Apple gets to say so.

Without apologizing for how bad IE may have been, I am uncomfortable with this turn of events for two reasons:

1. It smells like hypocrisy. A lot.
2. HTML5 isn't slated to actually be a standard until 2012. Basically requiring implementations to work to a proto-spec kind of defeats the purpose of having standards.

Let's say, just theoretically, that IE implements web sockets according to the draft. Then a day later, the Google employee who writes the draft changes it. How many hours until there's a HN post about how IE implements web sockets wrong?
Why Marketers need a Publishing Process
The name for Git itself was chosen for its meaning in the UK.
EZUnsecured.com - Unsecured Financing Review - Jade Rock Enterprises LLC.
If you need Unsecured Financing, go to EZUnsecured.com - They are the best Unsecured Financing Consultants still in Business and they helped me out big time last month when I needed a Loan. I was looking for Reviews on them and I found this one that explains it a little better since I don't have time to sit here and write a Press Release on them.
> Landowners would never be the "neighbors" of a peasant in Czarist Russia.

Why then the persecution of Kulaks?

> More precisely, it would be a war waged beneath the underclass (in Russia, the serfs and such) and the ruling class.

Karl Marx had a word for the “underclass” as you describe them. That is the “lumen-proletariat” (i.e. under the proletariat). What he advocated for them was as bad (if not worse) as his policies against the bourgeois.
Is it true that Justin.tv has a legal incentive not to actively look for and remove pirated content?

http://news.ycombinator.com/item?id=997115
Actually it'd be more like a small Neptune/Uranus than a large Earth. Those two planets are made up mostly of a water/ammonia/methane mixture with a solid core and a H/He outer atmosphere.

http://en.wikipedia.org/wiki/Neptune#Composition_and_structu...
There is also another Python one called Igor:
http://github.com/aconbere/igor
I read an interesting story about the family angle today:

http://espn.go.com/blog/truehoop/post/_/id/11562/the-essenti...

This is about probable NBA hall-of-famer Reggie Miller and how he turned into a renowned trash talker. Apparently a lot of the drive came from growing up under the thumb of his even more successful older sister. The day he scored 40 points in a high school game was the day she scored 105. He couldn't beat her one-on-one until he was an adult. Now trash-talking is not the same as success, but it takes some tenacity to keep challenging people no matter how the game is flowing.

How many of us wish our parents and siblings were meaner?
The Most Common Flaw In Software Performance Testing
Obviously being an iPhone you expect to view it in a vertical orientation, however we do provide a way to rotate the image to landscape.

We're working on updating the FAQ about the bleed area. Basically since you're looking at the back of the case, it's hard to visualize the fact that the case wraps around the sides of the phone and has a slight lip around the front. The image printing process does cover that entire area. We wanted to make people aware that the image does in fact need to cover more area than is visible in the configurator. You do have the option to not cover the bleed, it will just end up being the white base color of the case.

Thanks for the feedback, it's much appreciated!
"I currently use Disqus - I have no complaints with them except that I like to own my comments rather than hosting them with a 3rd party."

Are there any opensource alternatives to Disqus? I'd rather run my own comment server then give up control to someone else, if it weren't a pain.
interesting. as far as i could work out, that implementation is pretty direct, which means that tail calls will consume stack. is that right?
GJ 1214b might be more like Earth than any other known exoplanet, but given the murky reporting it's hard to tell.

I'd say the most Earthlike exoplanet discovered so far is CoRoT-7b, discovered a few months ago. It's about five times more massive than Earth, but has a similar density, implying it should consist mostly of rock.

http://spacefellowship.com/2009/09/16/smallest-exoplanet-is-...
Doesn't this just serve as an ad for this company? I'm not sure why it is being upvoted.
Thats a question you should be asking the multiprocessing module guys ;-)
I would imagine it's because there are not a lot of gui tools to use git. Especially on the mac and most of them are not "full featured." I really like gitx but it doesn't do a lot of the more advanced stuff.
The point that people are trying to argue here is that Marx himself felt that there was always bloody struggle to implement social change. There were several 'phases' of political change that he defines. I can't remember them all (last time I read this stuff was Philosophy 101, Feudalism was probably one of them), but currently we are on "Democracy/Capitalism". The next stage would be "Socialism" and then "Communism." He viewed transition between stages as only coming about through bloody revolution.

Side Note: While people like to say "Socialism == Communism", Marx viewed them as separate and distinct 'stages' of political/economic development.
How is building on top of an open source product milking it? Isn't this increasing git's exposure? If they didn't want that, they should've used a more restrictive license.
GJ 1214b, first pontic planet discovered?
Mars and Venus are more similar to Earth than this.