skysight-inc/HackerNews huggingface dataset:
He's just saying its more impressive to make a ball from scratch and get it rolling than it is to keep a ball rolling. Extra-ordinarily hard to do either one imo.
Fullstack Academy, top-ranked coding school, is hiring devs to teach code in NYC
Do they really need to invent that much? It's true that the current situation is maybe the worst they ever faced. But there are a lot of places where water is even more valuable as a resource. Are they also looking into what people in the desert do to keep their water sources alive, etc?
Ask HN: What are the best non-American Linux media/blogs?
That's also what I was wondering. Touching something wet, being warmed by the sun, and all that, can't be good for the black plastic.
black is best suitable color to deflect UV rays.
Yes it's a double edged sword, in most cases I would favor the ability to update and fix the application without having to force users to manually install an update.
Was the article edited after you read it?

> And the primary reason for deploying the hollow balls is more to protect the quality of the water rather than to simply stop it evaporating. In the reservoir water, the naturally occurring bromide was mixing with sunlight and chlorine (added to disinfect drinking water) to create dangerous levels of the the carcinogen bromate. Shade balls should stop that harmful chemical reaction from happening at a large scale, and of course by deflecting the Sun's rays, they also keep more of the water in liquid form.
The article says all of that:

> And the primary reason for deploying the hollow balls is more to protect the quality of the water rather than to simply stop it evaporating
Senate committee seeks email facts from Clinton’s tech company
When they built 7km of the A4 highway in the Netherlands it ended up costing about 900 million euros, so that's what I based the numbers on. Not sure what's causing the massive difference. Maybe the 4 million dollars is per lane? Maybe a different construction technique? Cost of lights, safety rails, etc.? Dry soil vs wet soil? Maybe urban vs rural? Bridges? Bridges are insanely expensive, an 800 meter bridge ended up costing 1.2 billion euros.
Now you just said the opposite of what intuition suggests without any evidence, or even argument. Please elaborate and don't just heat up the discussion!
How to Promote a Culture of Innovation
Then the first derivative comes into play: some days you manage to keep it simple, other days you overcomplicate things. And there's no sure way of telling what kind of day you'll get next.

This tends to affect future work rather than the current sprint.
Totally agree with this. As a dev it might sound like a cool thing, but as a user it sucks. Many, many times I found myself not updating an app because I won't agree with the changes (UI, new features, etc) or new permissions that were required.
You could start doing contract/consulting work just to get a feel for how you work together.
Nice one. However, VirtualBox's shared-folder support is so god-awfully slow, that here at work we all swapped out the regular boot2docker setup for boot2docker-xhyve[0] which is so much faster at nearly everything that it's not even a comparison.

Now, with ailispaw's dockeroot-xhyve you can even get a VM root image that can be grown on the fly, so you never run out of space on your VM when building large Docker images.

In addition, I'd never recommend Docker Compose to web developers that rely on databases, as quirks with it have caused many a volume-only container to be destroyed and rebuilt, thus defeating the purpose.

[0] https://github.com/ailispaw/boot2docker-xhyve
I'm playing around PredictionIO, MeteorJS... Posted ;-)
Because a lot of people here are "quiet failures".
Black is the best colour to absorb UV. You want the UV to not reach the water, so you want whatever is on top of the water to not allow UV past.
According to a chemist on /r/askscience, the plastics probably contain carbon black [0] as a UV protectant. So it might not be deliberate.

(/u/Platypuskeeper) Although I have not seen a specification of what
the balls are made of, what I know from polymer chemistry is that the
black is quite likely from carbon black (essentially soot), which is
used as an additive/filler in polymers (e.g. tire rubber) for multiple
reasons but not least UV protection. Carbon black is one of the most
(if not the most) effective UV-protective additives, precisely because
it absorbs the UV and prevents it from penetrating deeply into the
plastic. Plastic without some UV protective additive would degrade
pretty quickly in the California sun, not least HDPE which has pretty
bad UV resistance.

https://www.reddit.com/r/askscience/comments/3gpu6x/why_are_...

[0] https://en.wikipedia.org/wiki/Carbon_black
You missed the recursion:

Hofstadter's Law: It always takes longer than you expect, even when you take into account Hofstadter's Law.
It reminds me of the game World of Goo - those uncanny black blobs floating around.

As the site says, the device can only withstand a few months of sustained use - which is a pity.
In all honesty this is what Java was designed to tackle.
Hey! No Windows version unfortunately.
http://arstechnica.co.uk/
Cool!

The designer (http://zelfkoelman.com/) is Dutch, and the name is actually a pun in Dutch. The word 'Ferrolic' is pronounced almost the same as the Dutch word 'vrolijk', which means 'happy' or 'joyful'.
I gave up setting up my mac for Docker.
It's just way easier to set up another dev machine with Linux since it can be used as dev machine these days.
Wouldn't it make more sense to add the chlorine after the water is drawn from the reservoir?

Doesn't that fix the bromate problem at the root?
Seeing this, I just can't stop thinking of why they choose to create an entertaining device and if this fluid has any practical applications.
By way of comparison, the single-threaded numbers for PageRank on the `twitter_rv` graph on my laptop are 1.5B edges in 5s, which is about 300M edges per second per core.

PageRank isn't doing much other than a load, a few += operations, and a store. The main reason it is slow is because memory is far away, but if you lay out the edges intelligently your rank data is usually in the L3 and then computers go fast.
Ask HN: Testing new market with landing pages, what % conversion to look for?
We've been developing a product for the last few months which has a large but saturated market.

We've decided that with a small twist, we can be in a completely blue sky environment.

We've shown our designs to a few potential customers, and they love the new idea (though they also loved the old idea, just didn't know all he other options that existed, so I'm taking their feedback with a grain of salt).

I want to test the market and get a feel for how large the market may be and how much customers may be willing to spend.

I'll be creating a few different landing pages, focusing on a few different customer types, as well as buying adwords to direct traffic to these pages.

However, I'm not really sure I know what I'm looking for. What would be a good click-through rate? As we'll be asking for a potential customers email address, what percent of visitors should we expect will give us their e-mail address?

Is there anything else you'd recommend we do? Am I going about this all wrong?

I've been searching online, but everything just says "setup a landing page and drive traffic via adwords", but once you've done that, how do you know if you were successful?
Interesting, thanks for sharing! I agree that the shared folder situation is catastrophic. Doing anything significant with the mounted folders, like doing builds or simply watching for changes is unbearably slow. What I generally do is have a 'rsync' container and attach its volume (--volumes-from) to all containers that depend on the folders. Then, I watch on local file changes and rsync to the container. Builds etc. are all done within containers and this seems to work great!
Oh I am aware, I just did not want to get in to the OSI and GNU spectrum of licensing.

I was going to say Debianesque, but I kept deleting whatever I wrote in its place because I just thought it would lead to off-topic trolling.

In short: I wanna build my own Arch Linux, and Arch User Repository, but using Guix. We shall see if I ever do that as I promised myself in the next 5-10 years. Haha.
A bit OT but it would have been automatic if docker used a content-addressable filesystem to store the image content. Unfortunately `docker commit` is nothing like `git commit` as it creates a differential snapshot of the filesystem. It unfortunate because now the user has to be careful not to insert a lot of data between steps in his Dockerfile or they will be shipped with the container even if removed by subsequent tests.
Sadly no support for Parallels.
I totally agree. I run a Saas from my home office and have some large customers (as in multinational corporations). They completely focused on features and service. There were questions about myself and my company but in the end it was the product that impressed[1] them.

[1] Their words.
Black absorbs more light (and, yes, heat), which means less light penetrates through it to heat the water directly. If you block one bright light with a sheet of thin white plastic, and another with a sheet of thin black plastic, you'll see a lot more light shining through the former. And do remember that the primary purpose is to block UV, not heat, so you want maximum light absorption even if it means greater heat transfer.

Chrome-mirrored balls would certainly be even better, but the whole reason they're using plastic balls is because they're dirt cheap. If you have enough money to fill your reservoir with disco balls, you'd be better off just building a gigantic awning.
Looks like it's coming to Chrome: https://groups.google.com/a/chromium.org/forum/#!topic/blink...

But agree iOS Safari would be a great addition for this.
Just a guess, but maybe chlorine needs a good amount of time to be effective, and the transit time from reservoir to tap might not be enough
Thanks for making a bit of sense of this!
I have a question:
Can genetic information be zipped ? As in a library of words, that restores condensed information to its full density?
But Vagrant uses boot2docker underneath. Do you use docker provider or a linux image with docker installed ?

Also how do they compare ? Ignoring the boot2docker image vs base image with docker.
I honestly didn't know! Thanks for the pointers!
I wonder if floating solar PV was considered as an alternative/complementary solution that might pay for itself over time:

http://www.eastgreenenergy.co.uk/for-business/products/float...
Is there any reason why you guys don't have your reservoirs underground? It seems to me that that would solve a lot of problems.
I would guess that having loads of dead algae in your drinking water is not much better than live algae. You want to keep assorted gunk from having a chance to grow in the first place.
> Lenovo reported revenue of $10.7 billion, up three percent on the same period last year

And yet they fire people.

I really hate these MBAs with the politic that "Oh well we didn't achieved our continuous growth, let's sack some people".

Back in the day, companies would be happy to have any profit at all.

EDIT: Being downvoted by MBAs it seems.
Google sees its first post-Alphabet spin-off
Thats pretty amazing!
Current-gen consoles (PS4 an Xbox One).
I kind of cover it in my other comment, but the issue is that now all char pointers are nullable, so you _have_ to assume that all "char* " are Maybe'd.

But it could just as well be that only some of your strings are nullable, and so you could get rid of certain code paths.
Another Salvo in the Second Crypto War (of Words)
"laying off 3,200 employees"

"in a move that should trim its wage bill by an estimated $1.35 billion per year."

$1,350,000,000 / 3,200 = $421,875

I need a payrise.
> Covering the reservoir with a tarp is too expensive (costing over $300 million) and plastic balls are a much cheaper option.

This is what I don't get in this story. How on Earth are plastic balls cheaper than just covering the thing? One would think that a tarp would use less material and be easier to manufacture than the equivalent number of plastic balls.

EDIT: Thanks for all your answers. I guess the heatwaves we have right now in Poland are negatively affecting my imagination :(.
I've recently started using gridFS for a proof-of-concept project (mainly because I wanted to leaarn more about it), and was wondering about your choice of S3 over something like this (or an equivalent).

In my case, were this project to go into production, I'd probably recommend using S3. Given you have 8TB of assets, I was wondering if, at that scale, S3 still represents a lower TCO, or if you had other reasons for using it? Obviously you are using Dynamo for your metadata and SNS/SQS, and hence have a pretty AWS-oriented stack to begin with.

Anyway, just asking out of interest.
This looks cool, although for the Windows install I'd have hoped that there would be an option to integrate Hyper-V with it instead of Virtualbox, seeing as Hyper-V is available on all Windows 8.1/10 pro/enterprise systems, and having multiple virtualization platforms active on a system is generally a bad idea...
That's what I thought, too. Shiny silver balls would reflect even more light, and look super-cool!
Since it's LA, they could have recycled millions of silicon breast implants instead of using plastic balls. ;)
I wonder what the long game is here. High end replacement batteries for existing cars seems like a beachhead attempt rather than the real target.

Apart from the environmentals (see sandworm101), are debatable and the main tradeoffs is weight vs capacity.

Sports car enthusiasts seems like the most likely market. Some of these guys will drill holes into foot pedals to save grams. You'd need to look at what's available to them to see if this would sell. Comparing to average lead batteries is not much use.

Anyway, this probably isn't the long game.
Tencent invests in Scottish indoor mapping technology company Sensewhere
Angry Birds 2 hits 30M downloads in two weeks (1/3 from China)
Can I ask a silly question? How did you get all the apps? Did you have to buy them all and download them? Or do you have a special deal?
Maybe because most GNU/Linux developers seem to be happy using it as a PDP-11 with a VT100?

Having used a multiple of desktop systems since the mid-80's, and lots of their main IDE systems, I could never grasp this attitude. And yes, I do my way around Emacs and Elisp (but it comes from MIT Lisp culture).
WatchTower – A Sample App for the Google Proximity Beacon API
Who invested in companies that were happy to have any profit at all, back in the days? I mean, we are talking about days when inflation was >4% ...
TIFU by getting Reddit banned in Russia
A lucid-dreamer's guide to controlling the sleeping mind
I'm guessing the problem is managing a tarp that big.
I'm thinking that IPFS (http://ipfs.io/) has more of an opportunity to fill the distributed-filesystem role de jeur, alas .. Seaweed-FS seems flakey and not quite ready for primetime. Poor conclusion?
Well after taxes I take home ~1300GBP(~2000USD)/month.
The cost of living is higher,but then - I'm in the North East of England, which is comparatively cheap. I do get 25 days of paid holidays + unlimited sick leave. Other companies over here pay a lot more, but then...I love what I'm doing. It's a hard decision man.
> One would think that a tarp would use less material and be easier to manufacture than the equivalent number of plastic balls.

How do you suspend the tarp? What about when it rains on the tarp, increasing its weight substantially? Repair the tarp when sections get damaged? UV resistance over its lifetime?

Using barges/boats and dragging it from shore-to-shore is very slow going, and any suitably durable tarp (i.e. waxed canvas or some plastic) is going to be HEAVY.
They can still exist. Its not always in your own code.
I find all the recent discussions about how we are past the tipping point pretty scary. However, let's hope it will help to raise the awareness globally and help us take more decisive actions (whatever it can be, including geoengineering)
Which ones?
How would you make a lake-sized tarp? How would you deploy it, repair tears, etc. You can just make balls with a press and dump some more if they get damaged.
UV + Chlorine = Bromide
You know, I would. My partner is also a programmer, works in the same city, is the same age as me, and makes $15k more than I do. But then again...I absolutely love what I'm doing. I work on a AAA project that is going to be one of the major releases of 2015/2016 and that millions of people are going to play. The work is great, the people are fantastic...I love it. It's only the pay that is shit. But do I really want to be doing something that I won't enjoy just to have more money? Probably not.
They don't care that much about heat, they care more about sunlight not reaching the water, which black balls are more effective at.
Just delve into the Xerox PARC archives of Smalltalk, Interlisp-D and Mesa/Cedar and you will see how much catch-up is still left.

It is really a pity that those ideas didn't spread as they should have been.
Weirdly, UI interfaces are also a problem in the game world. Where we want to have a designer or artist design and implement something in a game in a fast way we often resort to using Scaleform[1]. It is flash based tool for games, within the industry it is notorious for how slow and inefficient it is. A simple UI element can often be more costly than a major in-game 3D object.

We are willing to pay this extra cost for these elements because they are often required to be quickly put together and then iterated on over a long period of time in a very dynamic and changing system. Some elements may be moved from Scaleform into a more native implementation but for the most part it is left to be slowly parsed and inefficiently rendered.

Basically, where we need fast changing interfaces that arent necessarily implemented by high skill programmers then we are going to take a performance hit to get the same level of visuals we could get if we had the time and manpower to approach it better.

[1]http://gameware.autodesk.com/scaleform
Will tarp be a single piece or multiple pieces? What's the weight of the tarp? how do you make sure it's on the surface? Or do you need a support structure to keep it above the surface (say a meter etc.)? Will it have holes to drain? Will holes be sturdy enough in the long run? etc...
I played it up to level 8 a couple of years ago, and gave up once I hit 8.

My problem was that I thought the core gameplay was really flawed: there was (there may be now, I haven't played for a while) no benefit to holding territory, only taking territory... which means you have a vested interest in letting the other team capture your portals so you can take them back. So after a while each team takes turns capturing the portal and sticking cheap and crappy level 1 resonators on it. You don't want to make the portal hard to recapture. That's not fun.

Wandering around cities looking for portals was fun, and got me to find several places in the city where I was living which I wouldn't have found otherwise. (I have since moved city. Maybe I should try it again...)
They're pretty hard to dig. Outside resivour can be made by damming a mountain valley and filling it in.
And which particular empirical dataset is giving you cause for concern?
Congratulations to the team.

I learned Smalltalk with Visual Works back in 1995, it was a great experience.
In terms of throughput, the RAM is great. It's the latency thing. Which is why intelligent scheduling with embarrassingly parallel problems like this makes such a huge difference.
Things I want to see:

* the game of life

* someone blowing smoke rings

* Robert Patrick from Terminator 2

* maybe a waterfall
The on-access scanner intercepts requests to open files, and scans them. Echo just writes to the file and closes it. It doesn't try to open it again once the EICAR string is in there. I'm speculating here, but Vim probably writes the file/buffer, flushes, and then tries to obtain a file handle to it. At that point an on-access scan will occur, and it will find the EICAR string.

A scheduled scan would pick this up eventually.
Nice to see someone has done this finally!
When two implementations look similar, inexperienced coders are unlikely to know which one represents the bigger risk.
And they'd sink
I wouldn't be surprised if the balls increased the evaporation rate, for the simple reason that it will increase the surface area of the water (the balls will rotate in the water, bringing wet surfaces up). Black balls will also heat up more, causing more evaporation.
It does have practical applications, but that doesn't mean you can't use it for entertainment too.
Outsourcing Reinvented
At ~1500 clock cycles, even a relatively conservative 1.2 instructions per clock per core is enough.
I'm so surprised that there are people who actually have a sense of things. I try to tell others all the time that in software having an inexperienced developer you need to multiply with 3x for best hopes and with 10x for common case, sometimes even experienced devs ending up between 2x and 5x.

People often don't believe me, some reason being that some developers really deliver on time and sell it as finished but then having the rest of the team fixing bugs and working around strange APIs for months. Often it's just that they also haven't experienced the pain of developing something of reasonable scale and stability.

No man, these are not tears, I just got something in the eye.
It's also a pun on the English frolic (which derives from the Dutch word, apparently).
Researchers reveal electronic car lock hack after 2year injunction by Volkswagen
I don't know if it is different were Lenovo operates, bu there in Sweden if i get 100 in salary, the company has a cost of 200 because of social taxes, employment tax etc.. I guess also HR will have less to do, which contributes to the cost-save.
You _really_ want to contact YC directly to ask your question, since it will most likely be overlooked on HN, and formally, you're not supposed to use HN for this sort of thing.

https://news.ycombinator.com/newsguidelines.html

> "Please don't post on HN to ask or tell us something (e.g. to ask us questions about Y Combinator, or to ask or complain about moderation). If you want to say something to us, please send it to hn@ycombinator.com."
Repair, weight, suspension and deployment seems like the hardest issues to tackle.

The tarp would ideally need to be reflective, like a white roof on modern buildings. The rain issue is the easiest one to solve, since the tarp could be slightly perforated to allow drainage.

I wonder if a permanent structure over the lake would be easier than a tarp? Like literally building a roof.

Either way the balls seem like a solid approach.
I guess that the area to cover is very wide, and having a tarp that size can be expensive. And then you still have to manage it in order to tolerate the weight of rain water, leaves and sand that would eventually gather upon it.
While you can indeed transform Emacs/Vim to a good IDE, there are lot of (experienced) people who do not. Anecdotally I have seen quite a lot of posts boasting use of 'vanilla' editors without plugins.

Regarding your GDB screenshot, that is certainly good, I would argue though that using pure text (with some images included) is limiting oneself.

This being said, I really hope that NeoVim will go far enough and bring good enough integration of Node.js and javascript in general (my current work uses these technologies). So far I have been quite disappointed by stuff like tern[1]

[1]: http://ternjs.net
Yeah. Employee cost > employee salary. Still... $421,875... Somebody has got their math wrong.
For me, back in the day, means since mankind does business not when MBAs were released into the world.