Search found 5533 matches

by Xanthir
Fri Nov 17, 2017 10:11 pm UTC
Forum: Mathematics
Topic: Assassin Problem over the Internet
Replies: 40
Views: 6380

Re: Assassin Problem over the Internet

but there is a bigger problem with the solution as you describe it: If the cards are offset by an even number, you don't have a single cycle at all. If it shifted by two, you get: 1 has card 3 2 has card 4 3 has card 5 4 has card 6 5 has card 7 6 has card 8 7 has card 1 8 has card 2 So you have...
by Xanthir
Thu Nov 16, 2017 11:43 pm UTC
Forum: Mathematics
Topic: Assassin Problem over the Internet
Replies: 40
Views: 6380

Re: Assassin Problem over the Internet

Hmm, watching the videos, I don't like the solutions presented. The originating person's proposal is, with the extraneous stuff removed: 1. Number all the people 1-8. 2. Get cards numbered 1-8, in order. Cycle the deck (move top card to bottom) a random number of times. 3. Give the first car...
by Xanthir
Mon Nov 06, 2017 7:38 pm UTC
Forum: Mathematics
Topic: What is a Euclidean Number
Replies: 13
Views: 3548

Re: What is a Euclidean Number

Yeah, near the end it starts explicitly depending on you knowing some funky geometry proofs on your own; some of them are *not* reasonable to figure out on your own.

But the rest of the game is great!
by Xanthir
Wed Nov 01, 2017 3:18 pm UTC
Forum: Science
Topic: Is meditation just relaxation?
Replies: 15
Views: 2249

Re: Is meditation just relaxation?

People these days are too quick to dismiss things that aren't proven by study... if mediation makes you feel better, then it works. I get great results from meditation, and know a lot of other people who do. That those results aren't adequately explained or described by a study don't change that th...
by Xanthir
Tue Oct 31, 2017 4:56 am UTC
Forum: Coding
Topic: Coding: Fleeting Thoughts
Replies: 9853
Views: 1749643

Re: Coding: Fleeting Thoughts

↶ Possible confounding factor here being that 30 Jan 1918 on the Gregorian calendar was a Thursday... but, 30 Jan 1918 on the Julian calendar was a Wednesday, so Russia had a Wednesday followed by a Thursday, nothing unusual there, just the actual date did weird things. Ah, indeed. I just did a cal...
by Xanthir
Sat Oct 28, 2017 4:08 pm UTC
Forum: Gaming
Topic: I need a Game Recommendation
Replies: 1533
Views: 338064

Re: I need a Game Recommendation

Doki Doki Literature Club is free and easily available on Steam, and is much better than you'd immediately think from the name and presentation and apparent genre.
by Xanthir
Sat Oct 28, 2017 3:45 pm UTC
Forum: Coding
Topic: Coding: Fleeting Thoughts
Replies: 9853
Views: 1749643

Re: Coding: Fleeting Thoughts

Tub wrote:
And weeks are surprisingly regular - there has not been an instance where, say, a wednesday was skipped or where two wednesdays followed each other.

Russia in 1918 would like to have a word with you. (If I'm reading the calendar right, they had two thursdays in a row.)

(But I'm being a pedant.)
by Xanthir
Thu Oct 19, 2017 8:00 pm UTC
Forum: Science
Topic: Bad science jokes!
Replies: 100
Views: 32962

Re: Bad science jokes!

These are supposed to be bad jokes.
by Xanthir
Wed Oct 04, 2017 10:35 pm UTC
Forum: Mathematics
Topic: Estimating Max with Only Definite Integrals
Replies: 14
Views: 4712

Re: Estimating Max with Only Definite Integrals

@arbiteroftruth: Ah, didn't think of the fact that you didn't need to repeat the finer-grained calls, that's clever and would indeed work.
by Xanthir
Mon Oct 02, 2017 5:12 pm UTC
Forum: Mathematics
Topic: Estimating Max with Only Definite Integrals
Replies: 14
Views: 4712

Re: Estimating Max with Only Definite Integrals

The "use the second thread multiple times" thing was factored into their cost equation already. Depending on how the data is shaped, multiple sweeps at different resolution may or may not be useful. If things are usually broad and smooth, then yeah, but if the maxes happen in relatively na...
by Xanthir
Wed Sep 27, 2017 9:55 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1882: "Color Models"
Replies: 81
Views: 10686

Re: 1882: "Color Models"

↶ Jumping to browsers for a moment, it's actually CSS that says everything is sRGB by default. spec Images are meant to respect their embedded profile if specified; otherwise we assume the colors are in sRGB. J is right in all the details - color management has been such a shitshow for so long that...
by Xanthir
Mon Sep 25, 2017 6:31 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1882: "Color Models"
Replies: 81
Views: 10686

Re: 1882: "Color Models"

Jumping to browsers for a moment, it's actually CSS that says everything is sRGB by default. spec Images are meant to respect their embedded profile if specified; otherwise we assume the colors are in sRGB. J is right in all the details - color management has been such a shitshow for so long that pe...
by Xanthir
Mon Sep 18, 2017 4:11 pm UTC
Forum: Coding
Topic: Manufactoria - Make Turing Machines with Conveyor Belts
Replies: 350
Views: 92007

Re: Manufactoria - Make Turing Machines with Conveyor Belts

This is the least rude thing you could possibly do, PF.
by Xanthir
Fri Sep 15, 2017 9:02 pm UTC
Forum: The Help Desk
Topic: Why is my internet connection insecure?
Replies: 2
Views: 1870

Re: Why is my internet connection insecure?

I'm guessing that Firefox is having trouble loading something it's using as a canary (maybe related to the page's HTTPS certificate, maybe something about DNS), so it assumes your connection is being jacked.
by Xanthir
Fri Sep 15, 2017 8:56 pm UTC
Forum: Science
Topic: What exactly does unification mean in physics?
Replies: 6
Views: 1873

Re: What exactly does unification mean in physics?

Ah, yeah, that helped a *ton*; I was laughing to myself at how eSOANEM’s "simpler" second explanation flew right over my head as well. ^_^
by Xanthir
Wed Sep 13, 2017 9:16 pm UTC
Forum: Science
Topic: Why is there red on both sides of digital rainbow images?
Replies: 25
Views: 4234

Re: Why is there red on both sides of digital rainbow images?

Color vision *is* quite variable, and can have significant, if subtle, effects that are hard to diagnose unless you're very careful. I didn't know I was moderately deuteranopic until a high school physics class about light, where one of the teacher's slides had a blue/green-dots colorblindness test ...
by Xanthir
Mon Sep 11, 2017 9:09 pm UTC
Forum: Science
Topic: Stupid Science Q&A
Replies: 34
Views: 3969

Re: Stupid Science Q&A

More moon = more tides, everyone knows that.
by Xanthir
Sat Sep 09, 2017 9:07 pm UTC
Forum: Science
Topic: Why is there red on both sides of digital rainbow images?
Replies: 25
Views: 4234

Re: Why is there red on both sides of digital rainbow images?

@Flumble: Ugh, yeah, I noticed that, but the image doesn't appear to be on Wikipedia at all anymore. And the current response-curve image I could find doesn't have the little uptick in red response out past blue, which is key to the whole damn thing. Ughhhhhhhh. Why does the digital image of the rai...
by Xanthir
Wed Aug 30, 2017 5:36 pm UTC
Forum: The Help Desk
Topic: Windows 10 Automatic Update
Replies: 11
Views: 5358

Re: Windows 10 Automatic Update

Please don't stop your Win10 updates. Those are important to prevent your device from getting pwned. Days sometimes matter when a new exploit comes out that's easy to weaponize into a worm. Yes, it's annoying when your PC restarts, and sometimes updates come with other stuff that you don't care abou...
by Xanthir
Wed Aug 23, 2017 7:39 pm UTC
Forum: Science
Topic: American solar eclipse
Replies: 44
Views: 5566

Re: American solar eclipse

Yeah, there's a reason several of my friends who traveled to see totality turned it into a multi-day vacation - it led them avoid the post-eclipse traffic!
by Xanthir
Mon Aug 21, 2017 10:42 pm UTC
Forum: Fictional Science
Topic: Universe with different laws of physics
Replies: 6
Views: 3487

Re: Universe with different laws of physics

A really nice one is the Orthogonal series by Egan - a trilogy of sci-fi novels exploring a universe with Euclidean spacetime (rather than Minkowskian, as ours is). They're interesting in their own right, with recapitulations of modern social struggles in a pretty alien species, but they're also a b...
by Xanthir
Mon Aug 21, 2017 9:30 pm UTC
Forum: Science
Topic: American solar eclipse
Replies: 44
Views: 5566

Re: American solar eclipse

My wife accidentally took a great shot - the sun itself is flared out, but the lens flare got a really sharp rendition of the eclipse: https://twitter.com/tabatkins/status/899685444081770496
by Xanthir
Mon Aug 21, 2017 9:27 pm UTC
Forum: Science
Topic: best way to store matter on a large scale
Replies: 13
Views: 1955

Re: best way to store matter on a large scale

↶ Stars are what you get when you store hydrogen. In the same sense that a runaway reaction is what you get when you store enriched uranium: only if you're fucking it up . If you store hydrogen in sufficiently small clumps, you don't get uncontrolled ignition. That's probably all you need to do - s...
by Xanthir
Mon Aug 14, 2017 7:33 pm UTC
Forum: Fictional Science
Topic: Alien Species with 2 Independent Pairs of Sexes
Replies: 3
Views: 2195

Re: Alien Species with 2 Independent Pairs of Sexes

Mating schemes distilled into an easier list: MM+MF = B-mate for MM MM+FM = A-mate for MM MM+FF = A-mate for MF, B-mate for FM MF+FM = A-mate for FM, B-mate for MF MF+FF = A-mate for FF FM+FF = B-mate for FF As you note, the mix sexes are viable on their own, and have the interesting social dynamic ...
by Xanthir
Wed Aug 09, 2017 9:58 pm UTC
Forum: Mathematics
Topic: Foolish question debunked. Move on, nothing to see.
Replies: 80
Views: 11013

Re: Does the Banach–Tarski Paradox prove that you can't see the edge of the universe?

B-T has nothing to do with viewpoints, or translations of viewpoints. It's just a funny example of a non-intuitive result of the Axiom of Choice.
by Xanthir
Wed Aug 09, 2017 4:50 pm UTC
Forum: Mathematics
Topic: Foolish question debunked. Move on, nothing to see.
Replies: 80
Views: 11013

Re: Does the Banach–Tarski Paradox prove that you can't see the edge of the universe?

Yeah, either there's an edge, or it's closed (wraparound), or it's infinite. As people repeatedly say, none of those involve B-T.
by Xanthir
Tue Aug 08, 2017 11:22 pm UTC
Forum: Coding
Topic: var == 'value' vs 'value' == var
Replies: 20
Views: 8303

Re: var == 'value' vs 'value' == var

Hmm, yeah, "tainting" the result of an assignment such that it can't be used directly as a boolean would work even better. The tautology operator (!!) is always there for you.
by Xanthir
Tue Aug 08, 2017 10:24 pm UTC
Forum: Coding
Topic: var == 'value' vs 'value' == var
Replies: 20
Views: 8303

Re: var == 'value' vs 'value' == var

Yeah, that's a reasonable retort. Anyone who does "foo() == true" is making a mistake in the first place. ^_^ So, make the following fixes: 1. if() (and loops) *only* accepts actual bools. 2. == and != does *not* accept bools (instead it throws an error saying to just use the value itself,...
by Xanthir
Mon Aug 07, 2017 8:13 pm UTC
Forum: Coding
Topic: var == 'value' vs 'value' == var
Replies: 20
Views: 8303

Re: var == 'value' vs 'value' == var

No, you get the problem even if you throw away the concept of "truthy/falsey", if the accidental assignment was of a boolean value.
by Xanthir
Tue Aug 01, 2017 9:54 am UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 622
Views: 82169

Re: Science-based what-if questions

The singularity is absolute minimum entropy; there's a single possible arrangement of things in a singularity. (Rather, our models fail at singularity, but at an ε afterwards, entropy is still exceedingly small and rapidly increasing.) Heat death is maximal entropy; the *density* of entropy asymptot...
by Xanthir
Mon Jul 24, 2017 10:31 pm UTC
Forum: Gaming
Topic: My Pokemanz, let me show you them...
Replies: 543
Views: 122760

Re: My Pokemanz, let me show you them...

The legendary raids started yesterday in Pokemon Go (Lugia and Articuno only, right now), and Googlers have been organizing raid parties all day today. Gotten pretty lucky with my catches - caught a Lugia immediately, then did 3 raids before catching my Articuno (and then caught another on the fourt...
by Xanthir
Thu Jul 20, 2017 5:07 am UTC
Forum: Mathematics
Topic: Determining line of sight over time
Replies: 30
Views: 5615

Re: Determining line of sight over time

You can trace the path of each object individually, seeing when, if at all, it intersects the line going between the two target points. Do this for every object, and you'll have a list of precisely when the line-of-sight is blocked, and thus can easily tell if there are any clear periods where nothi...
by Xanthir
Thu Jul 20, 2017 2:48 am UTC
Forum: Coding
Topic: Coding: Fleeting Thoughts
Replies: 9853
Views: 1749643

Re: Coding: Fleeting Thoughts

The specific dialect I was using at the time (Corman Common Lisp) didn't require the # in some circumstances - you could just pass the quoted symbol. It was kinda confusing.
by Xanthir
Wed Jul 19, 2017 1:19 am UTC
Forum: Coding
Topic: Coding: Fleeting Thoughts
Replies: 9853
Views: 1749643

Re: Coding: Fleeting Thoughts

First print it out, take a picture with your digital camera against a wooden table, *then* import into a Word doc, screenshot it, and attach it to an email.
by Xanthir
Tue Jul 18, 2017 3:04 am UTC
Forum: Coding
Topic: Coding: Fleeting Thoughts
Replies: 9853
Views: 1749643

Re: Coding: Fleeting Thoughts

That's part of it, yeah. It's difficult to create a *less* efficient form of video than GIF.
by Xanthir
Mon Jul 17, 2017 3:31 pm UTC
Forum: Coding
Topic: Coding: Fleeting Thoughts
Replies: 9853
Views: 1749643

Re: Coding: Fleeting Thoughts

I feel like it might have been suggested in the past, but I don't recall anything specific coming of it. Feel free to open an issue about it in csswg-drafts, with the usage examples you're citing (which are why Twitter doesn't actually do gifs; it transcodes them to videos so it can pause them >_<).
by Xanthir
Wed Jul 12, 2017 6:26 pm UTC
Forum: Coding
Topic: Coding: Fleeting Thoughts
Replies: 9853
Views: 1749643

Re: Coding: Fleeting Thoughts

Yeah, push notifications are opt-in, and repeated-sync will probably be opt-in as well. It depends on how our security and UX people figure it; for example, we might figure that someone who visits a news site every morning is okay to silently opt-in to auto-sync in the morning. This is similar to th...
by Xanthir
Tue Jul 11, 2017 9:24 pm UTC
Forum: Coding
Topic: Coding: Fleeting Thoughts
Replies: 9853
Views: 1749643

Re: Coding: Fleeting Thoughts

Good thing 24 hours isn't nearly enough time for a malicious actor to do any real damage. I'll make myself more explicit here: If your server is hijacked by a malicious actor, they can send a malicious page to your users with *enormous* cache times, effectively sticking your user to the malicious p...
by Xanthir
Tue Jul 11, 2017 9:20 pm UTC
Forum: Coding
Topic: Coding: Fleeting Thoughts
Replies: 9853
Views: 1749643

Re: Coding: Fleeting Thoughts

↶ Is the idea that the following scenarios would prevent this from being a threat? ⋅ User visits malicious site; site installs a SW ⋅ While the user remains online, the site can continue to request sync notifications but they will continue to succeed immediately, same as the pag...

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