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nwjtkjn

118 karma · joined November 21, 2015

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nwjtkjn··on The Wikipedia Zero program will end in 2018
> AT&T does have a plan where any provider can sign up to pay for their customers' data use, which is different from waiving costs for certain large, established sites.

Wait, how is that different?

nwjtkjn··on Panza’s Paradox
I always thought Russell's paradox was basically just a formulation of the Liar's paradox in the language of set theory at the time, and that this was no secret. Its significance was not that it shed light on fundamental questions of philosophy, but rather that it poked a hole in what was supposed to be a foundation to all of mathematics.
nwjtkjn··on How many reversible integer operations do you know?
Is there a formal theorem making this precise?
nwjtkjn··on LAPD arrests man on suspicion of making deadly swatting call to Wichita police
Fair enough. The horrifying part to me was not the moment the shots were fired, but the escalation and screaming of inconsistent instructions by an unmistakably bloodthirsty officer to a man who was clearly scared out of his mind and literally begging for his life.
nwjtkjn··on LAPD arrests man on suspicion of making deadly swatting call to Wichita police
That video is sickening. That man was murdered.
nwjtkjn··on Settling Video Game Arguments, Part 1: Game Reviews
Alternatively, do the same thing with Twitch.

I watched some random streamer with 3 viewers play Skyrim an hour or so a day for several days, asking him what he liked/disliked about it, before purchasing it.

nwjtkjn··on China's New Wave of Internet Censorship: Name Verification for Online Commenting
I feel like this is a very recent change; I've definitely created "burner" gmail accounts in the past and I don't remember providing my cell phone number.
nwjtkjn··on Using Hilbert Curves to 100% Zelda
d
nwjtkjn··on Using Hilbert Curves to 100% Zelda
Good point, though I'm not convinced Hilbert really avoids this. For example, look at n=3 here:

http://www.texample.net/media/tikz/examples/PNG/hilbert-curv...

This might lead to say

. . . . . . . .

1 . . . . . . 2

4 . . . . . . 3

. . . . . . . .

when

. . . . . . . .

1 . . . . . . 4

2 . . . . . . 3

. . . . . . . .

is more efficient.

Generally speaking, it seems this is basically TSP.

nwjtkjn··on Using Hilbert Curves to 100% Zelda
Yeah sorry I meant like snaking back and forth, which you're right is not the same as pure lexicographic.
nwjtkjn··on Using Hilbert Curves to 100% Zelda
Yeah, sorry I meant like lexicographic on x, then swapping between lexi and reverse-lexi on y. Basically snaking back and forth.
nwjtkjn··on Using Hilbert Curves to 100% Zelda
Why is the Hilbert Curve any better in this situation than say lexicographical order on (x,y)?
nwjtkjn··on The New Firefox and Ridiculous Numbers of Tabs
Is there an extension that can display tab history as an actual tree?
nwjtkjn··on Ask HN: Are social games, such as Farmville, “dead”?
Perhaps for now, but the ubiquity of smartphones could also bring them back in new and interesting ways. The most recent runaway hit was Pokemon Go, and though it was clearly a fad, it may have had more staying power if the social aspects were stronger, e.g. direct PvP battling.

Caveat: Take what I say with a grain of salt; I've never built a game in my life.

nwjtkjn··on What the brain's wiring looks like
This might be naive, but I wonder if the essential part of mouse data could be compressed if only we understood it better.
nwjtkjn··on How to Interview Engineers
Yeah I was thinking each appointment had a start time and end time.
nwjtkjn··on How to Interview Engineers
Sounds like an effective filter to me. Where I work, this would be the first part of one of the interviews, with the second part being something more like "Given a list of calendar appointments, what is the maximum number which can be attended without conflicts?"
nwjtkjn··on Show HN: Build live location sharing in your app with HyperTrack
The blog post claims ~5% per hour.
nwjtkjn··on Snap Inc. Reports First Quarter 2017 Results
Physical stores are being replaced by digital stores, which are better equipped to measure precisely how effective an ad is.
nwjtkjn··on A monoid is a category, a category is a monad, a monad is a monoid
FWIW, I always thought giving the concept of "magma" its own word was a bit silly.
nwjtkjn··on A monoid is a category, a category is a monad, a monad is a monoid
The natural numbers {0, 1, 2, ...} under addition are an example of a monoid which is not a group. Another example is natural numbers under multiplication.

An example which may speak to a programmer more: the set of functions which take a 32-bit int as argument and return a 32-bit int, where the operation is composition of functions. The identity is the identity function. Since not all functions are invertible, this monoid is not a group.

nwjtkjn··on A monoid is a category, a category is a monad, a monad is a monoid
I would argue the concepts of monoid objects and the category of endofunctors on an object are simpler than that of monads, so this description does help. I come from a math background and had never seen this quote before, and I think it has given me a definition of (mathematical) monads that I can remember.

Haskell, unfortunately, is still quite opaque to me.

nwjtkjn··on Anger as US internet privacy law scrapped
There isn't much competition among ISP's in large cities, either.
nwjtkjn··on Don’t prematurely obsess on a single “big problem” or “big theory”
The post is nearly 10 years old, not sure if you count that as modern.
nwjtkjn··on Don’t prematurely obsess on a single “big problem” or “big theory”
Tenured at Princeton, had already solved some fairly big problems in the field, and it helped that FLT had recently been "reduced" to proving a conjecture about elliptic curves which were already very much in Wiles's wheelhouse.

Not to take away from his achievement, but I think it is not stressed enough how much the proof depends on work from previous decades that a priori had nothing to do with Fermat.

nwjtkjn··on This AI Boom Will Also Bust
FWIW, one does not accrue debt doing a PhD in something like Machine Learning.
nwjtkjn··on Barak Obama wants to solve robocar "Trolley Problems"
Nobody jaywalks in Los Angeles
nwjtkjn··on The decline of Stack Overflow (2015)
I have asked 0 questions, given 0 answers, and reached 0 people, giving an overall Reputation of 101 (the 100 bonus coming from activity on MathOverflow).

That being said, I probably hit StackOverflow at least once a month for my job, and if I'm working on a personal side project it's probably more like once an hour.

nwjtkjn··on Snapchat Releases First Hardware Product, Spectacles
These are the same teenagers/college-age persons who own $600+ iPhones.
nwjtkjn··on How to Tell a Mother Her Child Is Dead
I always figured this was because when it's cold out, people simply go outside less.
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