skysight-inc/HackerNews huggingface dataset:
I'd say it's more for big city to big city. NYC to London, Tokyo to Paris, SF to Hong Kong... There are already dozens of flights per days between those.

For that flights, a huge airplane makes sense.
> It stays a walled garden as long as it's under central control.

Can you provide an example of someone who does this right in your book? All instances are hosted by someone -- unless I'm reading you wrong it seems like the only thing that would satisfy you is a chat platform built on the blockchain.
Zulip rocks. Streams + topics are great when I can’t check chat constantly and need to later skim a large amount of activity.
We're using Avro + Kafka's Registry. We try to append to our messages to keep backwards compatibility.

That being said, there are things we intentionally do to ensure we can support this. e.g, Allow for nullable properties.

We pass in the message type, version, and additional headers. It's fairly common to create an envelope around the actual message. I would also suggest consider doing this for a few reasons. Skipping the obvious benefits, there's one powerful benefit in adding meta data to messages without having to alter the actual event. e.g, security tokens, time to live, and more.

I'm sure this might be also fairly commonly known, but I would highly recommend adding information like request correlation information.
The article is a bit incomplete. The space shuttle main engine already had two main turbopumps. IIRC this is because the optimal pump speed is different for pumping hydrogen and oxygen. They have very different densities. You want to avoid gearing as much as possible.

And the main problem problem in the staged combustion cycle - in feeding the gas generator exhaust to the main chamber is not that it's fuel rich or oxidizer rich - it's that it's usually much lower pressure than in the main combustion chamber, because it had to go through the turbine, which causes the pressure to lower.

That's why engines like NK-33 have a separate boost pump for the gas generator.
RD-180 has more pump stages for the fuel entering the gas generator (all oxidizer passes through the gas generator).

Full flow staged combustion is another way to solve this - put all the propellants through the gas generators and turbines.

I realize it's hard to write popular technical articles about medium complexity subjects and sometimes you have to take some shortcuts.

https://en.wikipedia.org/wiki/Space_Shuttle_main_engine#/med...
FYI: This article is 18 years old
I'm skeptical they will run for decades, two early model a380 which were on a ten year lease to Singapore were recently returned to the lessor. They tried to find buyers for them and couldn't. They're being scrapped for spare parts now.
I want to believe, but I'm skeptical. Without any actual metric to measure how amazing the lights look, you have to rely on people's subjective opinions. One person's "amazing" light show could just be faint wisps to someone else.

I also think that pretty much any photo is going to look more intense that what anyone can see in real life. Look at the main photo in the article. The lights are so bright that the ground is illuminated green. Really? I doubt the lights can be such a strong light source. They are also very sharply defined as a result of the longer exposure, a human would probably see something blurrier and more ethereal.

I could perhaps believe that under the right conditions and dark adaption a human could see the lights a bit more colorful instead of just white, but I don't see how the sky could dance with clear and crisp ribbons of green and purple for miles unless the solar activity was so strong all our electronic hardware was being fried. (A long time ago there was an event so strong the lights could be seen all the way down near the equator, luckily before we had computers)
> "so it's actually something not that non-special."

That is not totally true, This is a mix of 2 things, using the JVM (which like you said is being tuned and optimized for heavy loads) + using a true asynchronous and reactive programming (and IO) model built on great technologies such as (in this specific case: Kotlin, Eclipse Vert.x and Netty).

As an experiment if you would pick another random set of libraries (imagine a servlet container) achieving the same results would not be so trivial, see for example:

https://www.techempower.com/benchmarks/#section=data-r17&hw=...

And observe that Eclipse Vert.x is on the top for these reasons while other JVM frameworks are far behind.
This should be a warning for everyone not to fly Lufthansa.

The fake '5 Star' award they bought from Skytrax (and milked in Marketing till the cows came home) was bad enough. [1]

Last thing I'd ever want to do is fly an airline who would SUE me for not flying them. That's just beyond ridiculous in so many ways.

[1] https://worldairlinenews.com/tag/5-starhansa/
Unfortunately not all carriers give more space to economy passengers in an A380. Qatar Airways for example, pack the seats in just as tight. I actively choose against A380s for my long flights because the aircraft feels like a flying city as opposed to a flying village. An A350 or 787 provide a far superior passenger experience in my opinion.
Would you mind elaborating on why you dislike GDPR?

I, as a German, like GDPR.

Sure it isn’t perfect but it’s better than what we had before. Now when I request the deletion of my data for example a company has to and will nearly always comply. Before GDPR it was way harder.

I tried unsuccessfully to delete my data from some services before GDPR and it often went nowhere. Sometimes I didn’t even get a reply. Now it’s just a matter of sending a single email. I hadn’t had a single company that didn’t comply within the required time frame.
Unfortunately, I've rarely seen such a simple thing as file saving implemented correctly by many developers. Missing fsync(), missing checking of errors on close(), in-place non-atomic data overwrites. One of the good things about using SQLite/Postgres/MySQL is that at least they save your data correctly.
What Do You Think About Immutable Data?
The whole point of NoSQL was scaling to tons of writes. If you don't have "big data" or it can't handle it, then what's the whole real reason of existence for these things?!? :)
It's not just finland. I'd guess that it's much less of a problem anywhere in europe. As a german I can't remember when I had my last spam call (from a real person), probably multiple years back. An automatic robo-call, however, I have never received.
Yes, the A380 will never make 1 euro.

The project is financially a complete disaster and it's now with Brexit (hard or soft) that sponsoring from the UK will drop so they had to halt the A380
Longer body, I believe.
Pandas for the NBA Lover
I think the law is the opposite in the US. You legally can’t refuse the things. Or at least the mail carriers are absolutely required to deliver it to you.
I giggled.
>So provide a field labelled "Age" but named "email", and simply check it contains digits. If it's got an email address in it, it's a bot.

Or a blind user who might actually rely on both labels and names. That's a bit like what arxiv does, they have hidden links that ban your ip when you crawl, but the links aren't hidden for AT users. I got myself banned that way once.
Motivation Over Discipline
For hearts you only get one call and a few minutes to decide whether you are ready. If you don't pick up they go straight to the next person. My friend used a basic Nokia phone with a heart-wrenching message on it to prevent theft. (I'm not in the US)
Usually if its a 'someone', then its going to be a walled garden.

Take for example podcasting: podcasts generally speaking aren't walled gardens - its a completely open protocol based on RSS. No locking. Spotify Podcasts, is a walled garden.
I like to think of projects like this when a team of "engineers" have trouble scaling their cloud service to support more then one simultaneous user.
Are there rules against selling to robots? I mean, a great portion of the stock exchange is just that, essentially, no?
very long text,,,is there TDLR?
I've read a few posts on here about people getting off their A380 flights feeling better sans dry throats, chapped lips, etc. I find that a bit odd, as the A380 still uses bleed air systems, unlike the A350 and 787 which use filtered air. All other factors being equal, there should be no difference between air quality on a 777 and A380. Perhaps I'm missing something?
Where capacity allows, serving a route multiple times with small planes is preferred by airlines and customers. And even if slots are restricted, offering less capacity than demand (driving up prices) can be more profitable than trying to offer service to anyone who's willing to book.

Long range versions of single-aisle planes also change the dynamics a bit, putting less focus on hubs.
What’s the memory model for captured variables being mutated by multiple threads?
Marketing Case Study: Choosing Traction Channels to Test at Palazzo Interiors
I think "jvm is a hog" misattribution is actually part of the cause of "jvm being a hog". It implies that you don't need to worry about your memory management and efficiency in Java, because any hoggyness is the jvm's fault. With GC, you can just get away with having memory leaks everywhere and allocate millions of objects per second without any catastropic consequences. JVM software written with knowledge of memory management and that allocation isn't free can perform just as well as any other platform. As Bryan Cantrill loves to say in ever single talk: "gc is not your problem, allocation is your problem, GC just defers the cost".
There are random dudes on youtube who are virtuoso guitar players. So many in fact that they will never get signed because it's not a differentiating or marketable factor.
Some of the highest passenger counts per year are between Osaka-Tokyo or Sapporo-Tokyo or Seoul-Jeju or Shanghai-Beijing. And yet I don't see 380s on those routes...
At the risk of getting downvoted too, I'll second this. Reddit is already a great platform to read fun comments on any possible subject, let's try to keep them differentiated.
It won't make back the 25bn euro development costs, but there's an argument that its beneficial effect on the prestige of Airbus as a manufacturer will eventually make back those costs through increased sales of other aircraft.
If I'm in 5 chat rooms, does it make that much of a difference if they're on one platform or 3? Messaging and social networks have much bigger network effects than slack and spectrum.
I'm so out of date with Satellite server that my first reaction was: Wow it took this long to get oracle out!
It's not like the word 'fire hydrant' exists in those countries either, so some kind of knowledge/learning/look-up is involved anyway, no?
Just saying. I thought it was an FOSS project by the description in the post.
Yeah MariaDB got 'dynamic columns' first, which iirc supported key values but not arrays, and then MySQL added a more complete 'json' data type, so the exact functionality differs by flavour and version.

The postgres support is simply nicer to use and more powerful, e.g. the indexing.

But if your RDBMS is any fairly-recent version of MariaDB or MySQL, you can use JSON too.

Of the top of my head, the thing I find most griping about the MySQL syntax is you have to do

thing->>"$.key"

instead of postgres-style

thing->>'key'

Whereas what I really want to be able to do is

thing.key

But most of the consumers of these modern 'dynamic columns' are apps and then it all really matters less if you don't spend all your days at the sql prompt writing stuff by hand.
Don't they still use your phone number you give them for 2FA for advertising? https://techcrunch.com/2018/09/27/yes-facebook-is-using-your...
It was just a discovery phase.
I never got the usp of slack its a searchable private irc server is that it?
See you in a month (or 2592B microseconds)
I would have sent them a photo of a robot.
Diversity in medical training data is important, through it is much more complex than getting "US, Europe, Asia and Latin America". A EU citizen in the south will have complete different set of environment to a citizen of the far north. Using climate zone classification, EU has both Temperate (mesothermal) climate and on the opposite end Polar and alpine (montane) climates. One place where the sun never goes up for part of the year, and an other where people go to beaches for vacations in the sun. Medicine that involve D-vitamin, sleep, cancer risks and a lot more is greatly effected by the latitude, which is part of the combination that is genes and environment. In the end you need a multidimensional matrix with everything from environment to genes, such as ethnic groups, gender, climate, culture and so on. If you are doing something which is similar to scientific studies then there is also an error margin in the data collection, such as in ancestry, and the error rate differ from country to country. Treating EU as a single group is plain terrible from a representation perspective.

https://upload.wikimedia.org/wikipedia/commons/d/d5/K%C3%B6p...
Very pricy, the Renault Twizzy is only 9000 euro's..
But what do you mean by local?

This is designed for local chat, exactly like slack. It is designed to chat with a community (an open source project, or maybe a company).
In slack you need to register to every "team" you want to join, so how is it exactly the same to self hosted spectrum and ask users to register on your instance.

So it is a public garden, but you can take all your plants and plant then to your own backyard. It is not walled.
interesting. on another note am i just not getting the pun or something? "Nav gadgets will be Gah" can someone tell me what "Gah" is?
Grown men using emojis... Now that's something I will never understand.
My core issue isn't along the lines of centralized vs. decentralized. It's about things like:

- Do I own the data? Can I get all the data back easily, in usable format?

- Can I interoperate with it with my own tools? I have my preferences that generally fly in the face of modern UX trends, and being forced to use the officially sanctioned app is inherently limiting.

- What's the migration path? If the current gardener gets bored with the service, can the garden be "restarted" under someone's else control, with all the data migrated?

Decentralization is inherently inefficient, so I don't mind if some things are centralized. It's how they're centralized, how the ownership and control is distributed, that matters.
Correct, I'm in Kagoshima, so it's 285 km / about 3 hours. I should have put that in my post. The train only takes half the time (1h30m)
>A DB schema cannot fully validate stored data against the logic.

Postgres actually lets you run triggers and similar that can validate data arbitrarily. You can even do web requests with the right extension.

If that is not enough, you can run Python code in your database instead and do the same thing with a slightly more powerful language for general purpose computation.

You could write the entire logic of any business app in a PG database and only use the app as a shiny view layer.
I wonder how much optimization will it bring to compared to existing JS runtimes such as V8.

Thanks to competing world for web browsers, JS runtimes not only efficiently parse to optimized native code but also provide really good JIT compilation benefits.

Speculative optimization for V8 - https://ponyfoo.com/articles/an-introduction-to-speculative-...

Parallel and Concurrent GC - https://v8.dev/blog/trash-talk

Good summary on 10 years of V8 - https://v8.dev/blog/10-years
> hackernews.reddit.com -> reddit.com/r/hackernews

> Why does this subreddit exist?

Considering the prevalence of the rebuke "HN is not reddit" on HN, probably for people who want to talk in a more reddit-like style.
Speaking of your little e-book, I just sent you an e-mail with some thoughts on it, as promised.

(I may have forgotten to set the Title on that e-mail, sorry about that.)
With enough capacity, airlines would rather fly 10x A350/B787 between two major cities rather than 5x A380. Offers more choice to the customers (as already for JFK-LAX where you often have a flight every 30 min), saves fuel and makes airlines less vulnerable to idiosyncratic events (e.g. crew sickness or technical fault).
10 Years of V8 (JS Engine)
Acres of Chinese construction land for sale (permanent property)
$1.48 million ，
Need to contact me
email：brettcaomail@gmail.com
Just save the intermediate assembly files, with all helpful annotations, and analyze those. Much easier!
What I remember reading about the decision to launch the A380 is that at the time where the B747 was in hot demand, Boeing had no competitor for the jumbo jet, and used that as a point of pressure on airlines: you’d better order Boeing for smaller jets if you want a nice price and place in the queue for the B747. So that likely weighted on the decision to launch the A380. But I remember at that time, it wasn’t an obvious decision to make (not the least because airports had to redesign their gates to accomodate such a large plane).
Emirates used the A380 for short-haul traffic but rotated planes so that they would only fly short-haul occasionally. Wear and tear would otherwise be too high.
Because stealing is immoral but benefitting from your parent's earnings is not.
Kernel-space FLASH player.
It might be logical for FuckJerry to try to exploit the situation that they have already exploited once. It's not logical for Netflix to do business with them. From Netflix's point of view: It's reputational risk - you know these people were involved int he fraud and now you're going to publish their 'investigation' into it. Maybe FJ could have sold the footage and maybe sold the interviews, but anything involving them in a editorial role is propaganda. It has to be. They're not going to expose their business for the sake of one documentary.
Agreed, but traffic doesn't typically flow like that. Maybe for a live event stream's chat?
Cilium also does Service IP routing, ala the kube-router feature you're referring to.
Not mine, maxxxxx, nope, my code is TIMELESS. ;-D
I actually feel the difference most for B787, less exhausted and not as dehydrated after 8+ hour flights. A reason for me to book B787 wherever possible. I believe the A350 should be similar but wasn't able to test it yet on long-haul.

A380 is relatively quiet but air quality isn't really comparable with the Dreamliner.
"I don't think a bicycle is a replacement of a horse. There lots of people who are using a horse and satisfied with its features."
It is, it's licensed under the BSD 3 clause license.
> How do I store it? To me, NoSQL seemed like the choice in the past.

If you're using postgres, you could use a column of type jsonb. Postgres comes with many operators and functions (https://www.postgresql.org/docs/11/functions-json.html) to query into jsonb typed columns and many of them even allow index usage for very quick access.

However, the other option would be to use proper SQL tables and normalization to store your data. Then you can query very easily for your data and by making use of a real typed schema, you get free validation of your input and protection against corrupted data later down the line.

And aggregating your information to produce reports over various documents becomes very easy too.

Here's above schema in SQL DDL, Postgres dialect. I'm not sure about nullability and types of your values, but by making use of database types and constraints, you can describe the shape of your data much better which further helps you preventing invalid data from being stored due to bugs

create table things (
id bigserial primary key,
a text not null
);

create table c_things (
thing_id bigint not null
primary key
references things (id) on delete cascade,
ca text not null,
cd text not null
);

create table d_things(
thing_id bigint not null
primary key
references things (id) on delete cascade
-- ...
)
My true advice after leaving my job in Strategy Consulting to build a Startup
This is the first article of the history of Arex. I will narrate every month our key steps, failures and successes in order to help other entrepreneurs.

I hope this helps founders and people thinking about launching a new business to avoid some of the pitfalls. I will keep on writing brief monthly recaps to bring our experience and help society build successful companies that create value.

In the future sections the rest of the Arex team will be invited to write and share their ideas (CEO/CTO/CMO's point of view, Investor point of view, Intern point of view, etc...).

Thank you for taking the time to read, and thank you to the Arex Real Estate Exchange team for all the hard work that you put into this family every day.
Well, laser guided bombs have replaced the need for carpet-bombing a city, so that seems like a net improvement.
Scott McNealy's one-sentence summary of Sun is truly something we should all want in our obituaries:

> kicked butt, had fun, didn't cheat, loved our customers and changed computing forever
What I don’t get is that traffic will only increase. In many large cities you just can’t really expand airports. So even direct links using the B787 and A350 will become saturated at one point. So I would expect we will need jumbojets again in the future.
Somehow the codebase I recently took over has managed to mess this up. Every time any part of the state tree anywhere changes, the whole app re-renders.

I’m trying to track down why this is an issue, but so far I haven’t had much luck. Do you know of any tools that can assist with this specific kind of debugging?
> by exclusively targeting the enterprise market, Slack is leaving money on the table

No. By targeting the enterprise market, Slack is not leaving money on the table, it's not losing money. The claim that there's money in targeting regular users needs proof.
This is awesome. Now I am wondering if you could do effectively the same thing in Conway’s game of life, where if you zoomed out far enough you would see the game’s graphics.
Sounds like astronomy photos, always shown in super-saturated color. As compared to looking at the same thing with the naked eye, which looks close to black and white.
Does this mean you are categorically opposed to the idea of a company hosting a discussion service for users of the the product that said company provides?
I think the entire story will be lost on some future generation, unless you add to the end: "but perfectly human-like robots didn't even exist back then!"
Does someone know how this is so different in Europe, are there some technical measures perhaps? As far as I remember, I haven't received a single spam call in ten years. Apart from a couple of calls from weird countries that I didn't answer, but that's it.
That's a splendid response, thanks!
IRC is annoying to use on mobile even with bouncers or services like irccloud, in addition file uploads, easy third party integrations with mostly everything, and given a pretty sane ui/ux it makes it an easy choice for many companies/projects.

Yes, you could do most of these with irc's v3 protocol, but no one seems to be investing time and money to do that.

Matrix bridges for irc are also interesting as you get some of these benefits, but to the dismay of the IRC users that will see links for messages longer than what their server allows, and weird usernames that include [m].