skysight-inc/HackerNews huggingface dataset:
> How do you tell if a calculator is 8 bit or 16 bit.

As someone who has reverse-engineered calculators, that question has me curious. You could implement the same external behavior regardless of what processor a calculator uses. So I can't see any way to determine the bit width. Is there an answer I'm missing? (Also the question ignores the many 4-bit calculators.)

(Of course you could open up the chip and take a look with a microscope, which I've done. But I don't think that's the answer they are looking for.)
>Last year, Trump reportedly had an iPhone with just one app on it: Twitter.

Can someone with more knowledge explain how is this a security nightmare? If he's not using it for email, if it's just for him posting his opinions onto Twitter, I'm not sure I follow why it's so bad?
No idea. The "good" news is that you'll rarely be able to choose who you work with in any case.
Yes I tend to agree, however engineers generally need to arrange a mutually suitable time to, on a daily basis, interact with other engineers. And hence the work day was born.
Totally disagree. I was a mac user for 10 years before finally making the switch this year to Arch, and Gnome is definitely the most polished DE option I found. All software has warts, but I haven't come across anything in Gnome other than the memory leak (which is already fixed and awaiting release) - even that doesn't bother me too much.
It's hiring committee's job to read the resume, not the interviewer's.
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FreeBSD builds on the common sense. Using the latest ideas true to it's motto serving the community.

While try Linux, where is the peg of idealism in it. GPL 2/3/Affero. What substantial progress has that given us, except fancy technical names.

Apparently I can't reply for the honest checkmark in the HN system tells me “You're posting too fast. Please slow down. Thanks.”

-1 => Freedom of expression
+1 => Freedom of speech
Interestingly, today's NASA Earth Observatory image of the day is "Smog Smothers Solar Energy in China" https://earthobservatory.nasa.gov/IOTD/view.php?id=92054

A quote from the article: "The researchers found that in the most polluted areas, available solar energy decreased as much as 35 percent, or 1.5 kilowatt-hours per square meter per day. That is enough energy to power a vacuum cleaner for one hour, wash twelve pounds of laundry, or run a laptop for five to 10 hours."
I agree, but I still wouldn't call a nursery an abstraction; its an indirection, and a mutable one at that. I also disagree with the goto analogy; concurrency and control flow are two distinct things, they have much more differences than similarities.

Implementing a promise as a monad will yield all the same benefits while also keeping the ability to compose and be immutable; and then you have an abstraction and the result is simple.

I agree restrictions make the code better, this just isn't one of these cases to me.
in the meanwhile English schools are replacing analog clocks with digital ones because reading the two handles is too complicated for pupils these days... https://www.theguardian.com/commentisfree/2018/apr/26/analog...
Works for me. I only use other search engines in like 10% or searches.
I had a phone screen recently, and got asked some of the questions on this post. However, rather than that sigterm question, I got "What signal does the linux kill command emit by default?", (with the answer obviously being sigterm (I totally blanked out and got it wrong though :P)).

Anyway, I strongly suspect they're just misremembering that question.
Document repeated negative performance or toxic behavior and then act on it.

There are plenty of people in non-vulnerable classes who regularly do indefensible things because they know their companies won't act on it.
That sentence should probably be "with just one third party app on it". The phone probably has the standard set of Apple apps as well, including Mail.
Whoops! Thanks for the heads up.
The Celeron 300 could hit 450MHz and barely break a sweat. Of course I discovered that after splashing big cash on a P2 450. 50% OCs are unheard of today.
Check out this great REM sleep calculator

www.sleepyti.me
I'm not sure we need another thread of Apple-Bashing but I don't see why this in particular is an issue.

It makes sense to me for them to sell the power adapter and cable separately in case you want to replace just one.

I've bought several power adapters from Apple in the past and in my opinion they make it pretty clear that you're just getting the power adapter.

It seems like people are very happy to jump on any small thing they don't like about an Apple product and act like it's a huge deal.
The recruiters tell you if they want you to ask questions about specific topics and realistically I'm only going to get to ask one question anyway. The main bias that I'm trying to avoid is knowing what school the candidate went to.
I didn't say they have talent (which they might have anyway). I said they should compete, which means they should find needed talent obviously if they don't have it.
Well, I think the politicized muddle might be on the other side of this fence here. This reads to me like you perceive political implications, and work backwards to cast doubt on the data.

Do you think we understand muscles at the level of detail we'd need to understand neurons to build AI? They are much simpler, but there's a lot of crazy stuff about how myosin works we don't understand. And it doesn't matter, Victorians with stopwatches could correctly gather data about runners & swimmers & wrestlers, and notice what predicts what. Science at this level can be valid too.

And what I'm trying to tell you is that intelligence research is not all bunk as you imagine. There is lots of data. Lots of people have tried to shoot holes in it, for a century, and we keep the bits which survived that. Yes we use words which had everyday meanings before, because we always do that... I mean "energy" and "power" still have wooly everyday meanings, but are used precisely on your electricity bill.
This comment deserves to be its own blogpost. This paragraph in particular is key:

> The obsession in making Redux, a functional event sourcing like-thing into something palatable to the average developer is just trying to fit a square peg in a round hole. There's nothing unique about Redux to make it appeal to those use cases and sub community. What if we looked at Redux, and instead of only focusing on that, we pushed what makes it unique to it's limits?
I was working on an weather app. My wife use that app personally to track her health.

The app has some fun social activity and itself is very rewarding to use. The app itself maybe simple and the social interaction and a focus community make it very fun to use.

Beside that, I was trusted by the founders and given time to do many experiment: I have implement some really cool stuff in Go/Elixir.

It also open my mind. I used to hate MongoDB but through repeatedly learning I discover MongoDB was a way different in 2011.

In the end, I think the freedom of technologies decision, trust, and see the work you do affect your close relative are very rewarding.
This is not an awfully constructive or relevant comment, and moreover, the article challenges the very perspective of judgment that you take up on the issue
He had a blackberry.
> because reading the two handles is too complicated for pupils these days...

No, it's because they're not exposed to them before reaching school or anywhere else afterward. So the school then has to teach how to read them.

The fact of the matter is that the world is moving to digital clocks. You can argue about the merits of each, you can blame the generation that is being raised without them for not learning something they have no access to, or you can accept that the world is changing.
I'm guessing this is about the A7s - the sensor really is phenomenal. But it's also large and way too expensive for a vehicle (although the dynamic range problem would be somewhat solved with good hdr)
Continuing the analogy:

It has been patched, you just have to be willing to install the hotfix. It will temporarily make the bug more manageable, but won't fully patch it until you perform a full reboot.
I think that's what pomodoro time management techniques aim to address?

https://en.m.wikipedia.org/wiki/Pomodoro_Technique
Not that I know of, sorry. I would just check StackOverflow jobs and AngelList for the jobs with salary ranges listed
I didn't get that all from GP's comment. What makes you think they advocate that?
Yeah but I'm not the person making the hiring decision, I'm just the interviewer. The way this works at companies like Google is that the interviewers submit feedback to the hiring committee and the hiring committee decides.
Thank you for the recommendation. The weakness in the privacy fight is not only the size of the corporate coalition, but it's correlation. They're all in the same industry. When one weakens, the others tend to as well.

What does Dr. Olson recommend in terms of broadening coalitions?
It's how it is. Chinese/Japanese regardless of it's character hasn't stopped them from carving our respect or economic might the world. So liberalization on an idea for the sake of liberalization is deem to go nowhere.
Keeping computation open for interpretation – Ethnographers step right in please
If I had to guess I'd say, young dad plays with toddler while mom watches.
Yea, seriously.

>or the fortuity of foreign agencies not knowing his personal cell number

I find it incredibly difficult to believe that professional intelligence services don’t have his cell phone number already.
I'm not making a hiring decision, I'm just an interviewer.
An hypothesis: There are idea bubbles, just like there are financial bubbles. In fact, arguably a financial bubble is just one application of idea bubble - for example, 'real estate always goes up'; 'tulips are worth more than gold', 'crypto-currency doesn't need regulation', etc. That is, the evidence for idea bubbles seems obvious: they are widely known in finance, technology (hot trends, etc.), angry mobs, and elsewhere. I'm just classifying them as a way of thinking about them.

More specifically, I hypothesize that there is a bubble right now in political thinking: It doesn't matter what evil, incompetent, or highly risky things we do, as long as our side 'wins' in the immediate term. We can safely ignore the longer term consequences. A successful businessperson who relies heavily on international trade told me recently: 'Trump is vile, but I voted for him and I'd vote for him again - because I'm a businessperson and business is good.' In that statement they believe there is a problem but choose to ignore its consequences, even the ones that will directly affect their business (e.g., trade problems).

And that property seems to apply to all idea bubbles in all areas: Ignore the consequences. I can see how bubbles work up close: The mechanism seems to be that when everyone joins the bubble, 1) it's exciting and engaging, and 2) nobody is making us think about the consequences; the social pressure to exercise judgment band behave is gone, because nobody will judge you for it. The parents are gone - let's party! Pick up your pitchforks and torches! This is gonna be Awesome!!!

Reality is that which, when you stop believing in it, doesn't go away. - Philip K. Dick[0]

[0] Attributed; I don't have time to find the source.
What's almost more amazing is that the developer spent 1.5 years planning and 3 years developing.

I find it absurd but also inspiring that someone can devote that much time and energy to a hobby or unfunded personal research project.
I see this, as well as Hillary Clinton's use of a personal email server, as a manifestation of a problem with the way we do security: when IT security restrictions are a pain in the butt to comply with, people are going to try to get around them.

A trivial example: IT requires users to change their passwords every N days. So users start with "password", and when they are required to change it, they use "password1", then "password2", and so on.

A non-trivial example: someone in a high government position is told they have to use a crappy, outdated, locked-down Blackberry device to access their official email, so they start using a personal email account or a personal phone for official business.

Security doesn't work if it's hard to use, because people will find a way around it, and some of those people will have enough power that you can't force them to comply.
How the Nintendo Switch prevents firmware downgrades
Deadbolts and chains don't help if you're not in the room, since you can't lock those on the way out. I suppose this is why many rooms have safes as well, although I'm sure those are riddled with security defects too, like everything else.
Eastern China is not that great for solar anyways even without the smog: it would at least be foggy and cloudy even if the air was clean. Looking at the picture and reading the article, that capacity is mostly being installed out in western China where pollution (and densities) are much less of a problem. On the other hand, without super grid support, it isn’t going to help much in solving the east’s problems.
An extension of the idea behind the article here, if maximizing share holder value is the goal: https://www.newyorker.com/cartoon/a16995
I find that the solution to a lot of these trick interview questions is to use a hash table or some kind of a look up table. Even the famous google mock interview video uses a hash table in the solution.

The solution to this question is to use a 256bit lookup table.
You'd need to precompute the lookup table that will give you the bit count of every possible bit combination in a byte. Then traverse your 10,000 long array, use your lookup table to count the bits and add them to your total.
Storytelling and Cities
Something that scares me here--where is the awareness of emergent security errors arising from multi-threaded cryptography?

As an example, consider a multithreaded streaming crypto API which consumes a symmetrically-encrypted data stream with an HMAC at the end. If multiple threads are simultaneously decrypting this stream, then how do they synchronize and verify their respective HMACs (let alone one shared one)? Frequently, in my experience, the answer is never--they just pass results blindly to an application thread which then operates on this data. By the time some last thread has belatedly realized that the entire stream was forged,the attacker has already been able to force the application to run malicious code.
Almost everyone should build their own framework on top of existing frameworks for their own domain. At work, we have a common look and feel for all our applications so that's build into the framework. We have specific domain specific data types -- those would never go into someone else's generic framework but they are in ours.

I find this idea of building your own framework to be pretty rare -- I do it because I've actually had to build frameworks for platforms that didn't have them -- but most programmers are content to use what they're given but never think of extending it.
Think of universe as a reinforcement learning system. A system where its creatures are subject to a cost-function, the output of which is pain and suffering. You'll see how important it is for this world to evolve.
Sending bulk emails with Mailgun lists
I think that died when people realized that email is inherently insecure unless you jump through a LOT of hoops (e.g. pgp)
https://en.wikipedia.org/wiki/Black_bag_operation
1) Why do you need to go to a private institution? Is there evidence to suggest that it's superior to a public institution?

2) Affordability of housing is definitely a problem, but it's not just isolated to the upper middle class. Look at teachers, for instance, many of whom can not afford to live in the wealthy districts that they teach in. Or look at teachers in Oklahoma and WV and AZ, they can't afford their cheaper locales.

3) The upper middle class have it much, much better than low-wage workers, many of whom may be fired if they need to take a day or two off for an emergency. Nevermind paid time off, that's a rarity for many below the upper middle.

4) Yes, costs do scale with higher salary. It's not true to say that ownership vs rent is definitely "net losing", it's entirely situational based on interest rates, property taxes, local rents, and many other factors.

Overall: The larger problem is this: everyone outside of the corporate top echelons is getting squeezed. It's less about which non-top-tier you're in, but if you're not a millionaire or billionaire, you're getting a much less good deal. To say the upper middle class have it particularly bad is not fair at all to everyone below them, who have it far worse.

You might counter that these people do not have the skills the upper-middle does. But developing those skills is probabilistic and is aided by a good home life, strong schools, and an environment conducive to learning. Many poor individuals simply do not have the life setup they need to gain top level skills over the years.

I taught in public schools in Chicago's warzones, the South and far-West sides. It's hard for a kid to pick up a STEM career when their cousin just got gunned down, when they need to join a gang based on what block they are on, lest they be jumped by a rival block's gang on the walk to school. It's hard for them to skill up and get ahead when their father is incarcerated and their single mother is struggling to pay the bills. If their classmates and cousins are getting gunned down due to some cycle of pointless violence, how likely are they to learn their way to the top 95%?
Still dont understand why people can just say "i born a man but i like othet men". Do we really need to create a new gender stuff? People shouldn't get offendes by other people opinion
> You can buy, using real money, a virtual ticket for a virtual item. Then that virtual item can in turn often be sold to others for real money.

This exactly describes cryptocurrency.
I don't think that's true. I worked in Health Insurance for three years during the height of the ACA debates. I had high hopes for the ACA, but most of the positive provisions where crippled and the ACA varies heavily from state to state.

Had everyone been forced to buy from the marketpalce, we would have seen a more significant difference. After living outside the US and returning, I wrote about this last year:

https://fightthefuture.org/article/returning-to-america-and-...
Yeah, I see no cheating here. IIRC, as soon as you brought a water pipe to the border, you were offered a deal from your neighbors to buy/sell water. Same for electricity, roads... The guy just exploited something that was already there.
Ask HN: How to deal with opportunity costs and long time horizons?
Hi HN,

Background: I’m a 28 year old Front End Engineer for a small startup in SF.

I’m having a strange dilemma and I’d like to hear your thoughts / advice.

How do all of you deal with projects / endeavors that have uncertainty and take a long time to uncover the uncertainty? Recently, I’ve been thinking about diving into VR development in my nights and weekends, which are largely spent distracting myself with social media and other “infotainment” (Reddit). The time burns by painfully and I’ve been thinking about spending it better.

I've always been interested in games and startups and so I was thinking this would be an interesting path. VR seems nascent enough for participants to enter who don’t have a lot of capital. A solo venture may be too difficult but a small team may be able to do some damage?

Here’s my question: Is this something worth considering, due to how long it will take to validate? The fashionable approach to starting a company or a side project seems to be: Test it for 90 days and then pivot, continue, or quit. The problem with VR is that it will take me far longer to validate whether I’m even competent at it, since I’m starting from scratch and an “MVP” game requires a lot of moving parts (models, animations, gameplay, etc.) Is it worthwhile to spend, let’s say, 2-3 years experimenting and learning something only to find out that your efforts were fruitless? I find this especially worrisome because of the opportunity cost: I could likely start a different type of company, study to get a better job, or even spend my free time taking up a physical hobby like martial arts.

As an aside: the startup I work for could go out of business within the year as well, which stresses me out. I ask myself if I should be spending my spare time prepping for interviews and sending out resumes...

There is unfortunately only so much time in a day, and I struggle a lot with wondering how best to spend it. Any advice or thoughts are welcome. Thanks.
Got a grudge? Police just shut down biggest hackers-for-hire platform
Will China be the first regime to have carbon neutral high-tech mass surveillance?

With their newfound riches, imagine what futuristic, renewables-powered dystopia will flourish there.
I remember when he got elected in 08 he didn't want to give up his "Crackberry"
Our only discernible purpose is to propagate our genetic material (we are in fact 'machines' for doing so). Everything else is just something you or someone else has made up. So pick something that you can live with (:D).
Entirely missed my point, but other comments here summarize it way better than I did. The point is that this is nothing new, these types of attack vectors have been actively exploited for a very long time. If you are a thief, undercover agent, assassin, etc, you aren't going to disclose your methods. The people who know how, and do hack security measures like this keep it under wraps. I'm all for responsible disclosure, but that term only exists in the realm of ethical security. People who use these methods for malicious reasons are under no obligation to disclose what they do. So in turn, while the article makes it out to seem like this one company has hit a groundbreaking discovery, it's really not. Props to the guys at F-secure, but they are late to the game compared to the unethical realm of physical security hacking.
Neither did the temperature changes they thought would happen, happen in fact the never reports tone down the temperature not up.
Zero. I am already 100% on DDG or Bing