skysight-inc/HackerNews huggingface dataset:
64 LA subway cars cost $176 million [1]. That seems really high to me, at about $3 million per subway car.

Also people per hour is not really the metric the average person cares about. It's travel time to destination.

[1] http://www.lamag.com/driver/l-s-subway-cars-will-definitely-...
Can anybody in China comment on how popular Didi is? Is it as universal (young to old people) and popular as Uber (don't want to hear the political commentary). What about average ride price per KM (Renminbi or dollars)?

Seems like Apple's $1 billion investment last year (May) in Didi might pay off huge.
Easier to ask forgiveness than permission!
Moses wasn't a horrible person. He was an ambitious, unscrupulous, and effective person with a singular view --- one not totally out of step with the elite of his time --- that happened to be (in the opinion of many, including me) very harmful to the long-term health of New York.

I think it's your rebuttal that's facile here, not the comparison in the Twitter thread, but, like you, I might be wrong.
Yeah, they added like Mount Joy and Linconville on the Stouffville line. I think they are almost ready for two-way service on that line as well. Then all they need to do is figure out how to do it for less than $20/day.
My bet: it's all about the lithium. The Gigafactory (located near a large domestic lithium cache) will soon consume a large fraction of the world's lithium output, and currently, Tesla is completely dependent on other companies to mine it.

My question: will the debris Musk will need to transport away from the next "beta-test" city happen to contain large quantities of lithium? Or will his current suppliers have a new source of (too-good-to-refuse) industrial machinery?
> now I know. I also know the reasons.

Good for you. Now you can make informed decisions.

> matter worse.

What do you mean by "worse"? Your comment sounds like having issues in a software product is something embarrassing, something worth of hiding. I always assumed that it is a good thing to have an open discussion about problems in your own software, no?
Because that’s hugely inefficient compared to a subway network.

I live in Paris, France. 100% of its inhabitants have at least one of the 300+ subway stations under 1 km (0.6 miles) of their home. The subway system transports 5M people every single day. That’s twice the city population. That’s also 1.9B per year. During the peak hours you can have up to one train every 90 seconds for a capacity of 700 people each.
This is fun, but here's the actual, less snarky, response from Postgres developers, as previously discussed: https://news.ycombinator.com/item?id=12201353
The issue is that it's rude to quote someone and then respond with an emoji. If what they're saying is relevant then it merits a proper response. If it isn't relevant, or you don't have anything to say in response, then you shouldn't quote it in the first place.

You're welcome to come up with your own theories of what the emojis mean, but I don't see any point in doing so.
I feel as though a large scale privatization of roads would see an explosion in toll roads, which I don't believe is a sustainable solution to infrastructure problems.
3 global climate scares - none of which have come to pass. Please, fact-less nonsense. Global warming is coming to pass. That is a fact. The arctic is warming significantly. A fact. Not a scare story. The consequences are scary and uncertain. Have you ever heard of positive feedback effects? They can happen, we don't know. The release of methane in the arctic leading to runaway global warming - can we be sure it won't happen?
References:
https://en.wikipedia.org/wiki/Clathrate_gun_hypothesis
https://www.nasa.gov/feature/goddard/2016/climate-trends-con...
broadly, a generic hole is doable, it's been done many places.

just like software is doable. :)

sometimes you can't do it. but generally... you can. :)
Does this signal that Didi will likely enter an existing Uber market?
who wants to buy these domain names
tunnelrider.com
tunnelriders.com
Hi, I'm the author of the article :)

Honestly I just wrote this for fun to play devil's advocate and see how convincing an argument I could make. It was intended to be more creative writing than a serious market prediction. (The title used to be "How Google Collapsed" -- Startup Grind changed it and added the subtitle when they published it on their blog).

I don't think it's likely that Google is going to collapse any time soon. I just wanted to imagine a world where they had, and try to work backwards from there with current data.

It's my first article, and I'm only 21 so I definitely got a lot of things wrong and oversimplified/combined others. But I do have almost 2 years of work experience in online advertising, so I have /some/ idea of how things work.

I was honestly expecting 12 views and a mean comment about how stupid I was -- I didn't expect the article to pick up traction. The editor in chief of Startup Grind reached out to me and asked if I would like to have it published on their blog, and I said sure.

In response to a few of your points:

> * Random claim that google lost a major portion of its audience already?

All the comments about losing an audience and revenue drying up are all in hypothetical retrospective :)

> * Google already missed its chance to pivot" with literally no explanation or justification at all.

This point was about how if Google didn't have search, it would need to pivot. I was using AI as the example pivot, based on Sundar Pichai's comments about how he sees the future of computing.

> * Alexa has clear monetization strategy, but google home doesn't?

There was a link in the article showing that investors were worried about Google Home's monetization strategy, and Sundar Pichai basically said "Don't worry about it." They also briefly tried to play audio ads with the Google Home, showing that they were at the very least unsure about how they were going to monetize it.

> Come on guy, you can do better than this.

Thanks. You're right. I appreciate the criticisms :)
I really like that. Thank-you.
who wants to buy these domains
tunnelrider.com
tunnelriders.com
I consider myself a true fan of liberty and a flat tax is so regressive it seems an obvious attempt to stew hate for all taxes. It's so rare I meet such unreasonable people in my day-to-day (though I did yesterday).
This is going to vary massively city to city, just as it does for Uber/Lyft/Grab in other countries.
Ouch. Harsh, but true. I'll keep practicing :)
Their pitch is probably "we will become the WeChat (transaction platform) for all transportation and freight related needs"?

Would make sense considering their user base has already been trained to expect a one stop shop ecosystem from an app, as opposed to Western markets which expect siloed special purpose experiences.
Also: according to the video, entry is quite free. How will they prevent some terrorist asshole from causing major damage with a car full of explosives?
We know how to live on another planet like Mars. The issue is getting there, and getting there at scale.
Sure but there are reports and research. Here is a site that aggregates this data.

http://uberestimate.com/prices/San-Francisco/
That is totally how you are going to fly his rockets :-) So much easier if you just put on a helmet and now you can use your thoughts to control the switches and inputs.
When I'm on vacation or at family gatherings, I rarely take photos too. So many photos taken nowadays that I don't need to take any unless I see something that others aren't paying attention to. People are always very willing to share given the tech these days.
What are the odds, that a potential scam would be proposed at an SEO conference?
Not "exactly" the same recipe, but close.

I remember that I let it rise 3 times and punched it down and re-kneaded (not just the stretch-and-fold), separated by maybe 45 minutes each time.

I seem to recall that I used King Arthur brand flour (no GMO's) and used bread flour with a smaller amount of thoroughly mixed in whole wheat flour.

Using the oven, I pre-heated to 375F and used a spray bottle to mist water onto all sides of the oven. Another suggestion of putting a cup of water into a cast iron skillet placed on the bottom rung of the oven, would probably work also. The purpose is not to dry out the crust so much that it becomes uncomfortably hard.

http://www.tastebook.com/blog/recipes/2699447-Pain-l-Ancienn...
this ? http://newworldeconomics.com/corbusier-nouveau-3-really-narr...
The canonical source to learn is The Book: https://doc.rust-lang.org/book/

However, a second edition of the book is in the works and a lot of people have said good things about it. I think enough of it is filled out to be a good starting point: https://doc.rust-lang.org/nightly/book/second-edition/
Transparency doesn't require that you be able to read its memory directly, just that it is able to sufficiently justify the decisions that it makes.
Grow using the double bucket method. They are easy to move around and don't take up a lot of space. That's what I do now and it's been fairly successful for peppers (super hots) and tomatoes each year.
I have kept count.
You need viable solutions and cost/benefit analysis for how much warming is too much warming.

There is little to no consensus on all of that. There isn't a consensus on how sensitive the climate is to carbon and to what feedback loops exist. Even the IPCC ranges are fairly broad.

Then we don't know how much the warming will affect the actual climate and what the effects will be. What does earth at +5 degrees C even look like?

What if in 20 years solar, wind and battery tech is so cheap that natural gas and coal plants shut down. Everyone goes to electric cars, and carbon output plummets?
>taking out mechanics from Broodwar being equivalent to taking out athleticism from Football was particularly insightful.

It's interesting that lots more people play video game football than actual football.
About 400 miles to the north, there used to be a palindromic bakery (the Yreka Bakery):

https://en.wikipedia.org/wiki/Yreka,_California#Palindromes
https://en.m.wikipedia.org/wiki/Tokyo_subway_sarin_attack
This is a slide deck from a presentation at Percona Live 2017.

https://www.percona.com/live/17/sessions/postgresql-response...

We're missing everything that was said by the presenter. I would strongly suspect that the presenter said something about the slide.
Fair, and 'opprobrium' was a bit heavy.

I don't think there is a one sentence description. It's a very, very rich book - a rare thing, with no easy summary possible. I have no philosophy training so I'm not qualified to discuss whether those aspects of the book make sense or not, but there is an involved (and unresolved) discussion on the nature of 'quality' which is alone worth reading it for. There is a narrative. There are questions of mental illness, of family, of interpersonal relationships, all of which are a pleasure to immerse oneself in. It is a difficult book, but ultimately I felt myself the better for expending the effort. I think you might find the experience worthwhile too, given what your comments suggest about the perspective you'd read it through. You might not agree with it but you may enjoy the argument.

A good weekend to you!
Happy Engineers Ship Better Code More Quickly
As others have said here, you really need to understand the needs of your users and build accordingly. Also, do not get bogged down by technology, start with shared google sheets/forms if that gets your work done while still meeting the needs of your users.
Any constructive criticism as to why? I was thinking no because of the availability of keyboard. I don't see any Dvorak keyboard in my country ever but then again I was being biased.
If anyone's looking for a good source of information on transportation costs, I highly recommend http://twitter.com/MarketUrbanism and http://twitter.com/2AveSagas. They cut through the BS of the mainstream media and politicians on transportation policy and give really intelligent opinions, particularly on zoning/land use and on the US's ridiculous transit costs.

(A lot of it is complaining about the ridiculous cost of New York's Second Avenue Subway, and complaining about how the media won't even mention that its cost was 3-5 times more per km than similar routes in London, Paris, and elsewhere in Europe. @MarketUrbanism also has a few other ticks:

* He aggressively argues that train systems in the US should save money by getting rid of conductors.

* Also, he argues that US buses should use Europe-style fare policing (with ticket inspectors) rather than requiring people to swipe as they board the bus.)

They're snarky and a bit hard to undeedia won't even mention that its cost was 3-5 times more per km than similar routes in London, Paris, and elsewhere in Europe. @MarketUrbanisrstand to the uninitiated, but they grow on you. I've learned a lot from them.
Is it possible to make a huge nuclear explosion/reaction that produces the same atmosphere we have on earth?
I wouldn't at all blame the VC's for this. Yak killed their own app overnight by taking the main feature that made it popular - the fact that it was anonymous - and making an about-face to suddenly require usernames (and strongly encourage social media integration). The fact that they thought that was a good idea in the first place, along with the fact that they didn't think that maybe they should A B test the change in a smaller market first, clearly demonstrates to me that the founders didn't know what they were doing and didn't have what it would have taken to be successful.

Before they shot themselves in the foot, they had a huge following among college students because the app was one of the best ways to get and share info on campus. You can't tell me that couldn't have been monetized. Hell, Durex could have made millions by offering $.50 off coupons on the app every night!

It's not that it couldn't have made money, the founders just didn't seem to have a realistic vision for how they were going to do so.
It got filled by Facebook.
That disagrees with the Twitter thread you linked to, which claims:

> Robert Moses weaponized Civil Engineering and Urban Planning to suppress marginalized communities. Engineering is always political.

Words like "weaponized" and "suppress" suggest that Emily thinks Moses was ill-intentioned, not merely an ambitious guy who in his monomania happened to overlook some of the more sinister side-effects of his work.
This is what happens when you kowtow to special interests who think they know what's best for 'civility'.
I bet that a number of Brood War AI developers could still learn tricks from the Pros. Here's another Day[9] video about some of the intricacies in Brood War's mechanics, and how they came to be exploited in pro play: https://www.youtube.com/watch?v=rWvoMrYCQBU
How do you plan on curbing harassment? I think, after Twitter, it's just plain irresponsible to not have some kind of plan for that.
Yes, feet are dragging from around 10.000 items in a folder. A mild annoyance at worst.
Hey there - incidentally, I'm the one that requested the piece. Totally respect you keeping the post where it is - especially if your reasoning is for personal brand benefits.

If your intention is to maximize its visibility, then we think we can help. Our publishers see 4-10x increased readership on their pieces once they move it from a small or no publication to Startup Grind, and without tooting our own horn too much, the brand does hold credibility with founders/investors, though admittedly less so with developers than, say, FreeCodeCamp, which is awesome too.

You won't lose our on your Google rankings as Medium is very good about giving canonical URL denomination as your piece moves around the site, and they also prevent links from breaking with elegant redirects.

When it comes to money, the standard on Medium has thus far been a free exchange: writers focus on creating great content, publications focus on promoting it. You benefit is sharing your idea, our benefit is folks seeing our brand supporting great ideas like yours. You can trust we're not making ad money on the piece, if that's a concern, and we don't plan on editing the content.

Anyway, if this is something you have more questions on, I'll track this thread, but if not, you've still got a reader & fan here!
Ah, that's interesting. That is a big fuck-up then.
Hackers would not go after Spotify to get free Spotify premium. If they are breached, what's happening to you has nothing to do with it.
Or how fast massive sudden un-employment results in riots. Fast change like this is bound to have side-effects.

> But mining accounts for a minimal portion of their economies and jobs, a recent study by various NGOs showed.

Which of course is great when you're sitting in your NGO provided air-conditioned office. But a few tens of thousands of miners might disagree with the definition of 'minimal'. For them it likely was all of their income.

I'm all for change like this but I would prefer a more gradual approach. Such as 'no new people are allowed to be hired for mining' or other more or less automatic mechanisms.
The Gardiner Expressway is managed by the city, as is the DVP. So not all expressways are provincial.
This approach is geared at telephone banking. It means no single employee will learn the entire secret during a call. You generally have a regular password in addition to this step.
It is not 'concealing its actions' if it is taking control of infrastructure and military power.

Just like I'm not 'concealing my actions' by putting a blindfold over your eyes. My action is "putting a blindfold over your eyes", which must be very apparent for the entire action to have any value. Now if I hide that action by putting on an invisible blindfold, then you've got nothing to complain about anyway.
It's a great video, but one of the most impractical ideas I've ever seen. It would be cheaper to buy more buses and install congestion charges (fees to drive in cities during peak times).
I think for it to work we have to assume that Smallville's factory can dump output onto an efficient delivery system and pick up raw materials (perhaps subassemblies) from that same system. Whether it is rail, or dirigibles, or automated trucks.

As for "Why Smallville's factory?", if I understand your question you are asking why anyone would contract with the Smallville plant for their parts over say Central City's factory? My assumption is that if all capacity is nearly equivalent (like machines are nearly equivalent in AWS) that factory choices would be based on available capacity and perhaps some risk avoidance (not have all your factories in the midwest in tornado season for example).
For investors, Yik Yak was a travesty. The fact that is raised nearly 9 figures along the way is yet another terrible indictment of the herd behavior found in private equity.

One thing I find interesting about this turn of events is that the person shutting the app down is Jack Dorsey. If I was an ecommerce player like Shopify or Square, disrupting social would be at the top of my list of strategic things to do. But Jack Dorsey can't really do that, can he?
We were a little naive
> turns you into Tim Leary

Or Doug Engelbart, or Steve Jobs, or any number of the other pioneers of personal computing who cited their psychedelic use as formative or informative.

I also just want to note that there are at least three earnest, substantial responses to your vitriol (I do not count this among them), and no attempts yet from you to respond to any of them. Perhaps you are just in a different time zone and will get to them later.
Thanks for the info. I asked because I didn't know, didn't mean to say that it was a piece of cake or anything like that.
The implication that the stated reasons are wrong and that Uber had some ulterior motive for switching is weird. They didn't have to say anything. They instead gave a rather detailed accounting of their reason. What's the motivation to lie? Nobody would have even known they switched if they hadn't said anything.
besides google, what are the best sites for learning about the challenges of underground mapping and the current state-of-the-art?
Not from my experience and not from what I've seen on glassdoor. Can you cite? I found amazon engineers universally having low self esteem. Which makes sense, why w ould you want to work for a company that treats you so poorly?
If the system doesn't move your car, then you need two cars and parking for both of them. Park your first car, use the system, then get into another car that you have previously left waiting for you.

Unless there is a stop at every home and business, you'll be needing cars. You might as well transport them.
Now that's a useful comment.

Here's Crossrail's video explaning how their TBMs work. This gives enough detail that you can get an understanding of what's going on.[1]

There's so much variation in geology. The Seikan tunnel to Hokkaido had huge variations in soil and the project went very slowly. Eurotunnel is mostly through chalk, and went well. The Gotthard Base Tunnel in Switzerland was a long grind through hard rock well above water level. That's a slow process, but was reasonably uniform. SF's BART tunnel, unusually, was built onshore in sections and lowered into a dredged trench. NYC's Water Tunnel #3 was in hard rock, and that project went very slowly.

Many things can go wrong. Hard rock may not be competent rock capable of supporting itself. The Tom Lantos tunnels south of San Francisco were through a small mountain of loose shale. One tunneling project in Japan hit an underground river.

The most advanced underground rail project today is probably the Tokyo-Osaka maglev line.[2] 43 kilometers of this is already operating, and most of the route is in tunnel. Tokyo to Nagoya is scheduled to open in 2027. The connection through to Osaka was scheduled for 2045, but the Government has decided to accelerate the program and get it done sooner. Here's what the ride looks like.[3] 500km/h. Working now.

[1] https://en.wikipedia.org/wiki/Ch%C5%AB%C5%8D_Shinkansen

[2] https://www.youtube.com/watch?v=z38JIqGDZVU

[3] https://www.youtube.com/watch?v=ltqp4McM2wY
I was thinking the exact same thing. In my suburban part of the east bay area, the nearest real parks are about a 45 minute walk away, through bland boring suburban streets, the nearest schools would require a car to reach, the closest supermarket is about a 20 minute walk away and there's essentially zero public transit (slow buses about once an hour).

The small town my wife is from in the North Caucasus region of Russia has green everywhere. It also has schools, kindergartens, small grocery stores and parks within ~5-10 min walking distance of pretty much the entire city and public transit everywhere, roughly one bus per route every 5 minutes.

Sure the buildings are arguably uglier but the area as a whole is beautiful and far more livable.
FTA: "But mining accounts for a minimal portion of their economies and jobs, a recent study by various NGOs showed."
Yeah that's a fair point. I’d suggest that’s a reason to think carefully before posting a slide deck, though. If essential points are left off the slides entirely, then it may not be such a good idea to post the slides by themselves.
I remember reading that dairy-based "antidotes" such as milk or yoghurt aren't ideal, especially as you get spicier, and that a better option is sugary water. Unfortunately, I don't quite remember the chemical/physical justification for this; something along the lines of the fats in dairy products just coating the spices in your mouth temporarily, while sugar actually absorbs and washes it away.
Why bring a bottle of earth with us everywhere we go? Why not adapt ourselves to the environments rather than the environments to us?