skysight-inc/HackerNews huggingface dataset:
Whilst I can see the reason why people baulk at giving Apple a cut, what doesn't ever seem to be widely discussed are the reasons why that cut might be justified or even well worth it.

The user experience of in-app purchasing on iOS is very good. Compared to the myriad online purchasing systems I've experienced in over a decade of buying things online, it's easily the most reliable and satisfying I've encountered. Case in point: I've had two separate third-party apps crash or stall during in-app purchase (one because of a loss of network connectivity, another where the app just crashed). Upon relaunching, iOS was able to work out where I'd gotten to with the in-app purchase and reassure me that I wouldn't end up paying twice.

This kind of reassurance is invaluable to consumers who aren't tech-savvy, and will almost certainly lead to higher conversion rates. In fact, it means that the user experience of a customer buying in-app purchase with a completely different product makes them more likely to use in-app purchase with your product! Where else can you benefit from this kind of self-reinforcing behaviour? Apple realises that providing this seamless experience is important, and so does what it can to discourage alternatives where a worse experience (an experience which might lead a customer to erroneously blame Apple or the device) might be the result.

Another important point to remember is that Apple targets the iTunes store to run at break-even (http://www.appleinsider.com/articles/12/02/23/tim_cook_addre...), so accusations that this is motivated primarily by profit are wide of the mark. Yes, that 30% cut helps run at break-even, but let's not forget what other benefits you're getting as part of the deal. And if you're certain those benefits aren't worth it, go try the Android Marketplace, and let us know how that works out for you.
This is a new version of the Samsung i8520 [1], announced/released in 2009/10, but with a lower resolution camera and projector (although that says little about quality).

[1]: http://www.gsmarena.com/samsung_i8520_beam-3150.php
Sum of first n natural numbers is n(n+1)/2. The sum of the array, represented by s, is n(n+1)/2 - x + y (subtract x - the missing number and add y - the duplicated number) gives:

1: n(n+1)/2 - x + y = s

Product of first n natural numbers is represented as: n! The product of the numbers in array is p.

2: p x / y = n!

(multiply by x - add missing number to product and divide by y - remove duplicated number from product).
If a is duplicated and b missing, computing the sum and the product of all the numbers can give you a-b and a/b, from which you can deduce a and b.
Probably easier to get the dogs running on a treadmill and power the lights that way.
There will be a huge market for this, especially among the younger generations and when combined with access to video services like YouTube. Projectors in phones will become a standard feature just like cameras imo. They just need to make the pico projector unit smaller.
Measuring the speed of web page loading on mobile networks is something that we wrestle with weekly (we make a TCP accelerator product for mobile operators), so I always love reading about new approaches and results. Unfortunately this particular one seems to have particularly dodgy methodology.

Most importantly, they did in fact not measure anything on mobile networks or even simulations of mobile networks. Instead it was a just a crudely throttled wired connection, which is a poor approximation for how a 3G network behaves. The right way to deal with changing network conditions is to actually do lots of measurements. This is particularly problematic since one effect of parallel HTTP connections is to isolate the congestion control effect of a random network event to just one of the 6 connections to a server.

Second, they are not fetching the actual web pages, but getting all the copies from a local cache. This totally removes the point of testing against multiple web sites. In the real world there's huge variability in things like web servers and TCP stacks / options.

Also, if I understand the replay tool correctly, it's not accounting for the network latency on the inet side of the test setup at all. I'm not completely sure whether this is benefiting SPDY or HTTP though (on one hand SPDY suffers from the latency at the start since it can't accelerate the single flow as quickly during slow start, while HTTP suffers from the latency). But it certainly removes the very common effect of there being a one or two outlier resources being loaded from slow servers.

Removing DNS overhead completely is a bit strange too, and would have the effect of magnifying any relative speedups / slowdowns.
How about one that you adjust your prices by whatever so that 70% is the old 100%?

If your competitors can offer lower prices and still give away 70%, then you're not competitive enough.
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The one place I'd see being used is mostly precluded by the "youthful" design (which I think looks like shit, by the way): impromptu meetings or small demos, replacing a dedicated pico-projector.
It also requires one to assume n! can be computed. Factorials get huge very quickly.
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Thank you. Are there slides of "Hammock Driven Development"?
I'm not sure that's it. I do 100% consulting, and so end up working with lots of programmers.

In my experience, younger programmers who are otherwise competent tend to create the most complicated, generalized systems imaginable.

It's only when you get older, and have done enough systems, that you start to favor the "simple" approach Rich is talking about.

If I had to guess, I'd say that younger, more inexperienced programmers know there is a problem with complexity, and believe that "general", non-simple solutions are the way to tackle that complexity.

A similar thing happens with college students introduced to a new topic. They'll write these elaborate, complicated papers about the simplest of topics -- because they don't understand it well, and don't want to miss anything. It looks and feels very similar to what inexperienced developers do.
Check out co-up, a bunch of startups and community meetups happening there. The people there are quite well connected to berlin startups too.

http://co-up.de/events.html
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>In the long run the open market always wins.

I've never seen an open market in the wild, much less it "always winning".

You mean an open market like the "$1 trillion bailout not to collapse the whole economy" open market? Or an open market like "we enforce strict copyright laws to artificially limit each copyrighted product to one maker and it's pricing at his whims"? Or an open market with patents, for the same purpose? Or an open market with frequent cartels, to everything from dairy products to RAM? Last, but not least, an open market where a country with a military advantage has several army units deployed and several wars to secure resources and keep their prices down?
Most companies do not need to hire the 'smartest people in the world'. They also don't need the 'hardest working people in the world' or the 'most creative people in the world'.

Sometimes a company needs the very best people -- and they can try to define what this means to themselves and then filter for it. However, generally they need people that can solve the problems that they face to an above market-rate level of quality, and that are willing work for the least amount of money.

Unless your companies selling point is solving hard mathematical problems, or designing the most beautiful/elegant interfaces you should probably hire for 'good value', and a few people that you believe to be 'multipliers'.
Another open source (Java-based) alternative is Gitblit http://gitblit.com/ .
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If consumers face substantial barriers in switching to a rival then there might be an antitrust case. From the point of view of competition policy, the idea of "market for this" vs. "market for that" can be misleading
I would be interested in talking to you about 3G TCP performance and CloudFlare. If you are interested my email address is in my profile.
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The last problem seems trivial enough, and I'm no mathematician. The trick lies in that you get to pick the starting point.

Imagine you have a circular track, and four segments of the circle, each representing the gas station's distance potential (the left edge shall be the gas station's location, the right edge shall be how far that station's gas will carry you). Place the segments any way you like on the track (though they may not overlap; overlap is double-burning gas. We 'compensate' for that by placing them adjacent, representing the total distance travellable on the gas in those two stations). You have a 5th segment representing the initial tank. All 5 segments form a complete circle.

In order for the trip to be impossible, you would have to arrange the 4 pieces in such a way that it would not be possible to cut up the 5th piece and fit it into the track without space left over. Since we know that the sum of the 5 segments (no matter what their division or arrangement) always equals a full circle, we can conclude that the trip must be possible.

We can then conclude that after placing the first 4 station pieces, any empty space in the track before the station with the most gas is a valid starting point that will enable you to complete the full trip.

In the edge case where your initial tank is empty (that is, your 5th segment is null-sized), you may start at the station with the most gas and complete the trip.
>Lets say (patent issues not withstanding), you created an exact clone of the iPad and iOS and sold it at the same price but without the 30% 'apple tax' on purchases.

What "Apple tax"? Haven't you noticed that competitors have struggled to offer the same prices for their tablets for example? The iPad/iPhone is one of the cheapest products on their market segment.

Just consider that when everybody expected the iPad to be like $999 or $799 on introduction, it came out at $499 -- and the mostly useless copies (now forgotten) that appeared of it, where in the range of $700.

Apple has their margin's with huge economies of scale and huge massive pre-orders of RAM, solid state storage and screen panels.
1) Momentum!

2) The implication of the question is not "can you complete the trip with gas left over", but rather "can you complete the trip". If the requirement is that you must have gas left over, then barring a trick answer, the problem is trivially answerable as "false".
They didn't classify Opera Mini as a browser since it doesn't interpret HTML or Javascript on the phone, that's done on a server. Opera Mobile is still banned.

Also, this also shows you can't change the http link association in iOS.
YQL and The Pirate Bay
I always beware of the "we want the best of the best" companies. Usually they are looking for the "best that don't show it if they are smarter than the boss". That's a shame ...
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Yes I understand that, but if SQL would become oracle expensive I think you will see a lot of companies/projects switching to one of the many nosql options that don't infringe IBM's patented API.
You forget the value of people who work well together as a team. Individually they might not be anything special but together they can produce great results.

Personally, I hate the idea of abstracting people out to fungible goods that a company buys in because it's a cop-out and an over-simplification. Putting together a group of people in a team is as much a social challenge as it is ticking technical requirements.
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> Indeed, Amazon’s curated (read walled-off) app store and fragmented version of Android could push developers away. “The further they go out on their own branch of Android, the tougher it gets for developers,” Ask says.

As a developer, the idea of a very well selling Kindle Phone device from Amazon would make me far more likely to develop for it exclusively.

My company is already limiting its Android tablet development efforts to the Kindle Fire, for similar reasons.
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Mark Kofman, CEO and Co-Founder of 300mg is talking about what his company is focusing these days
What are some popular myths in software development?
Umm.. well obviously some disagreed with that.

Here's how I see it:

Logging isn't ideal in traditional databases, because then you have to scale writes. Scaling reads is fairly easy in a traditional database, but scaling writes is much harder compared to something like HBase or Cassandra

Image storage in a traditional database will always suffer compared to other options. Filesystems are faster and easier to use, and things like S3 match requirements better in some cases.

I'm not really seeing anyone argue that ephemeral data is better in a Database than something like redis.
This is a real attempt to go after a market that has been trying to exist for a while.

Back in the late 90's i laughed at Salesforce pitch people coming in dragging two carry-ons on wheels - one for the laptop one for the projector.

Now they can slip them into pockets.

Its a real market, and the next step is I put down my phone as a projector, you control the projector from your phone.
Ideally companies would be making it harder or impossible to comply with sealed warrants.
>C# is largely effectively proprietary because Microsoft rattles the patent sabre at non-Windows implementations.

C# is an open standard, submitted to ISO and ECMA (at least for versions < latest). MS also signed a legally binding patent pledge to not sue anyone for the language and runtime IIRC.

There exist at least two C# open source implementations that I know of, Mono and some GNU project.
Are "big data" and data analysis practically distinct in the Silicon Valley?
The title text on "weight" says "Occurrence of search term weighted by field (name, summary, keywords, description, author, maintainer)". So, not popularity/freshness, just a rough metric for how well it matches your search.

Indeed, PyPI might not be the right place for a community rating system -- perhaps a site could be built on top of it to provide that sort of functionality.
Microsoft's relative power over the computing industry has been in decline for several years now.
SortaSQL
You could probably use it in more impromptu ways - e.g. by holding it above a sheet of A4 paper in a suitably dark pub, to allow an entire table to view a photo or video rather than having to pass a phone around. It wouldn't be stable at all, but being able to just beam a photo onto a random surface is pretty cool (although: cool enough to buy a phone solely for that feature? I'm not sure.)
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> People serious about projection will must likely have a real one.

Sure, but that leaves out all those not serious about projection, and even for the rest, they don't have a projector that fits in their pockets.

Compare with cameras: Before smartphones came with decent cameras, most people would just get out their good, regular camera. Less than ten years later, Instagram sells for ~$1bln.
That's not the case.

Sun wanted to charge Google for the license, but also wanted there to be a per-handset license fee. That per-handset fee was what Google couldn't agree on.
1. Not constant space. Not linear time.

2. Not constant space. Not linear time.

3. Looks correct.
Actually we had nosql databases for far more than we have had SQL databases (by definition, for one). They were quite popular in the seventies / early eighties. So, those too could have lots of old patents and prior art.
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so was it her friend or her son?
I very much doubt that the OP can solve either problem 1 or problem 2 with constant space. Hint: even storing an additional integer N requires \Omega(log(N)) space.

Edit: For the down voter: I searched around and found a discussion of the puzzle [1]. Please go ahead and read it.

[1] http://books.google.de/books?id=415loiMd_c0C&lpg=PP1&...
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Opera report says Internet getting PC-less
Reminds me of Sixth Sense [1] as demoed on TED, but the projector is placed in a bad location for this kind of application.

[1] - http://en.wikipedia.org/wiki/SixthSense
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>* I hate seeing corporations brainwashing people into believeing they have good intentions. They don't.*

No, man, they don't, they want to make, howyacallit, MONEY... (takes another bong hit), ... that's like hideous man.

Well, joking aside, people aren't exactly taking Google's or Oracle's side, that just note that if Oracle wins it's bad news for everyone else too

--despite whatever Google has done on the "wifi-gate" which is something completely different and beside the point in this discussion.
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Maybe if you are Google

Yes, ad sales is the most pressing issue facing humankind.
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It seems like Samsung are throwing phones out to see what sticks. While I think projectors could be useful, I'd be concerned about battery life and heat, not to mention what was cut out to fit this in. Hopefully they'll come to realise that the experience of using the phone is what wins, not how many widgets you can stick on one.
It isn't just Canadian. The French do it that way too. Interestingly, you can also have a credit card without having a line of credit associated with it, at least in France, I don't know if it's the same in Canada... I personally have an Amex and a Visa card, both linked to the same bank account, which has no line of credit.
An easy way to do the second is to consider the sum and the sum of squares. This gets you a-b and a^2-b^2. Recall that the latter is (a-b)(a+b) and the answer follows immediately.
1. How is this not linear time?
Looking at this from my office in Berlin, I thought "wow, they're even using GeoIP and some clever compositing to adjust the background to wherever I am."
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These techniques are quite sensitive to the distribution of the data under study. For instance, if the numbers being processed by the LogLog counter aren't uniformly distributed, the cardinality estimates you get from it could be arbitrarily biased.
I wish each and every single one of the open source developer who, every day, build amazing tools to make things like instagram possible would receive a tiny portion of that 1 billion dollars.

But that's not how the world works....

The real revolution of this century is not how many sheeps I can throw per day, but how huge a success the open source movement is, and what incredible companies we can build with it.
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And multiplayer gaming? How can you not think of two dudes playing Tekken on a neighborhood alley with their characters projected on a wall - friends cheering all around! Of course the obvious camera input etc. has to work altogether. I've been dreaming this ever since I was kid.
Definitely not a gimmick, and surely good new apps ...
This is actually really neat. Another step along the 'phone is the only device you need' road.

It would be great for quickly sharing stuff like a youtube video. Kids could use it to watch a movie in their room, or at a friend's, or grandma's. Similarly, it could be great for the travelling. I can see some really great augmented reality uses for this, provided there is enough developer interest.

Don't scoff at it because it doesn't match up to your 'real' projector-- it has some cool uses. The specs may not be so great yet (640x360 resolution, 15 Lumens), but it's very impressive that they got this into just 12.5mm thick phone, and specs (particularly resolution) will improve in future products.
I'm not convinced. When I think about kids or my childhood, it tends not to involve hanging out in places with a decent surface to project on and semi darkness to get a good image (or if they are in a place like that they've got access to a TV).

Perhaps when the tech has improved (both sound and vision) this becomes the replacement for the TV in the kids room - just plug it into a charger and project it onto the wall streaming over the net - but it doesn't feel like a mobile thing for them.

Remember, while this tech improves so do other displays. The expected standard will go up and the price of competing products will go down.

When you can have a large screen, hi-def TV in every room that you can wirelessly and effortlessly connect a mobile device to, which comes without the issues associated with projection (shadows, light and so on), why would you want a projector?
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apple do not deserve 30% cut from everything sold through apps. apple can not use a single rule to measure everything. as simple as that.
Oh, you're right! I only wondered because of what I've been reading about the case, since it was mentioned a few times.

Though I guess the same question could be asked of GNU Classpath, which as far as I can see is still actively maintained.
You're on their turf - stop complaining.

I wouldn't invest in app development ever, precisely due to these sorts of issues.
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"Hiring the smartest people" is always great right up until the "paying slightly above market rate!" part.

If you really are hiring the smartest people, what you are paying them should leave average people with their chins on the ground(1). If this is not the case, then I wish they'd quit bragging, because the smartest people aren't working there.

(1) This and/or have about the coolest place to work on the most interesting problems in the world.
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