The Nineteenth Byte - 2021-07-12 (page 1 of 2)

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12:02 AM

@xash and make sure to check out the other 10k+ tools as well as this for more info

caird coinheringaahing

ಠ_ಠ

:)

caird coinheringaahing

Actual page with more info

We haven't had anything with outstanding VTDs for ages, the mod tools page is so boring :(

The new-answers-to-old-questions is a neat thing. The second link is not a neat thing. :-P

caird coinheringaahing

Huh. When hyper migrated this to SO (got rejected), that was the first migration off the site (ignoring meta) since 2017

Jun 3 '17 at 18:33, by MD XF

I figured if it got undeleted, it could then get re-deleted, and have no undelete votes

Anyone else (10k+ only, sorry) think that this UI is awful?

12:15 AM

It's rather annoying that I can see posts only if I have my browser in fullscreen mode.

Uh, reading them without scrolling that is.

btw. is there a way to really delete an answer that I wrote, so that even 10k users cannot see it? I remember at least one case where I wished for that.

caird coinheringaahing

No

Unless you include personal information in a post, it's visible forever

(if you do ever include personal information, flag for a mod and they'll redact the revision)

Someone_who_likes_SE

12:34 AM

@cairdcoinheringaahing no going back when hitting Post Your Question

12:56 AM

Any feedback?

OldSandboxPosts

Sandbox posts last active a week ago: Blinking Lighthouses, Generate off-by-one regex for a string

1:37 AM

I really liked this answer codegolf.stackexchange.com/a/231199/105030 which taught me a fancier form of Wilson's theorem avoiding problems with -1 and testing n=4 for primality. Would it be appropriate to suggest a comment or edit mentioning Wilson's theorem as a spoiler to save people time in figuring out 'how does this code work?'

love how avocad has 18 bookmarks

why is it even called avocad? the post never says avocad, it includes advacado and avocado - was avocad part of alex's original message?

@cairdcoinheringaahing what the hell that is so bad

the user cards float off the right side into the page margins :/

also TIL that page existed

caird coinheringaahing

@Alwin You could leave a comment asking the OP to explain their answer a bit more

@cairdcoinheringaahing i cannot since im new with 30 rep

caird coinheringaahing

@hyper-neutrino Yeah, I think avocad was originally a TNB joke, then someone spiralled it out onto main

Alwin left a message in chat with a bit of a spoiler as to how this works, as well as a request for a more in-depth explanation of the specific mathematical trick used here (I'm being deliberately vague, their chat message should make it clearer) — caird coinheringaahing 17 secs ago

Left a comment for you :)

1:52 AM

Thank you!

@cairdcoinheringaahing i wonder if it was a real user on an alt to troll cuz they thought it'd be funny

tbh seems more likely than some random non-user or spam-only user :\

caird coinheringaahing

@hyper-neutrino I seem to remember that was a conspiracy theory

yeah sounds familiar

caird coinheringaahing

From memory, zyabin and TuxCrafting were the common suspects, but I don't think anyone was actually "accused"

Clearly it was Geobits - how else did he managed to VTC and comment so quickly hmmm????

:thinking:

caird coinheringaahing

1:58 AM

Everyone knows that when you VTC something within 30 seconds, you posted the thing through a sock :P

That's clearly how you're able to beat Charcoal :P

yep :P

caird coinheringaahing

Speaking of, we haven't had any spam in a while

Can you see when the last spam flag was raised?

This was my last spam flag, on June 29th

@hyper-neutrino because many peopl want know how juic advacod

There was one a week ago, wasn’t there

2:15 AM

@hyper-neutrino I like how you can bookmark deleted questions too

caird coinheringaahing

@user 9 days ago

2:41 AM

0

Q: Who can optimize this problem the most

Given A and B and T, every second, A, B change according to the following rule: if (A < B) A = 2 * A, B = B - A; else B = 2 * B, A = A - B; Find A,B after T seconds. (0 ≤ A, B ≤ 2 * 10 ^ 9; 0 ≤ T ≤ 10^18)

python fastest-algorithm c++ algorithm

1 hour later…

4:01 AM

CMC: Make a GUI window and draw a circle on it. The circle can be anywhere (and any size) on the window.

Define a circle :p

related

Redwolf Programs

@PyGamer0 Is a single pixel acceptable?

@RedwolfPrograms okay???

Redwolf Programs

I can't tell if that's a yes or a request for clarification :p

4:16 AM

@RedwolfPrograms ok

i said ok

Redwolf Programs

In that case, document.body.appendChild(document.createElement("canvas")).getContext("2d").fillRect(0,0,1,1) works for JS (makes a canvas since that's the closest thing to a separate GUI window)

this answer has a wonky circle

I was inspired by this and hoping to make a challenge related to it. You're given n representing an n-sided regular polygon and have to output the length of the chord (from one vertex to another, skipping the one in between)

user image

So it's a chord skipping the adjacent vertex, from one to another that's two away

But I can't find any info on the formula for length of a chord in a polygon. Can you guys?

just use cosine law

I mean, I guess I can calculate it, since there's a formula for the length of the sides of a polygon

@hyper-neutrino ?

4:24 AM

you know the internal angle

Oh, that too

so you have a triangle with two known edges and a known angle beteween them

Nice

True

Does that sound like a worthwhile challenge? I'm thinking so

I mainly just like that a polygon gives you phi, tbh

Otherwise I wouldn't have cared

specifically, the length of the chord is $\sqrt{2-2\cos(\pi\times\frac{i-2}i)}$

Jelly, 12 bytes: _2÷×ØPÆẠḤ2_½ but I'm sure it could be shorter

or sqrt(2-2sin(2pi/n))

4:27 AM

oh, nice

Wow... that's a lot of math built-ins

And not actually all that interesting...

@Bubbler wait, does it?

(am i entering it wrong)

uhh...wait

Apparently I suck at trigs

jht.hyper-neutrino.xyz

LIGHT MODE?!?!?!?

cos(x)=sin(pi/2-x) right?

@AviFS i don't like dark mode for sites like these

4:31 AM

What is this sorcery?!

but i can add one if you want

my yuno interpreter is dark because it's just an interpreter site - i like dark for coding but light for reading things usually

Fixed: sqrt(2+2cos(2pi/n))

Redwolf Programs

Just use my cursed dark mode snippet :p

or rather, i strongly prefer dark for coding and find both fine for reading

One of will be happy to pull-request a dark mode, I'm sure

Redwolf Programs

4:31 AM

document.body.parentNode.style.filter = "invert(1)";

:p

No need to worry!

@RedwolfPrograms -←1

@AviFS just use a dark mode extension

huh, no tau built-in

So Jelly version would be Pi divide half cos increment double sqrt which is 9 bytes

why divide half

4:32 AM

You don't need tau

@lyxal Any you recommend? I feel like those are way lamer than built-in

is 2pi/n not tau/n? would be shorter

pi/(n/2) == 2pi/n

right but 0,2,1 doesn't chain that way

@AviFS dark reader

let me get the extension link

darkreader.org

4:33 AM

:/

doesn't change the byte count tho: Jelly, 9 bytes: ØP÷ḤÆẠ‘Ḥ½

((pi divide) double cosine increment double sqrt)

Ah, okay

@lyxal Not sure how I'm feeling about this...

Do you use it?

Then having tau would indeed save a byte

@AviFS yes

that's how I got the link

user image

user image

4:35 AM

yeah - if it did 2,1 chain then you'd need the monad to stop the cosine from chaining with it which wouldn't save a byte.

Hmmm... I'll think about it :p

@lyxal i don't like that

i'd rather just roll my own dark theme

Turning it off for now, but thanks. I'll try it again later!

cmq - what color should I use for dark theme, and how should I track preferences?

@lyxal bitwarden user pog

imo, dark themese are waaaay harder to make look good than light themese

4:37 AM

@hyper-neutrino I used to use LastPass but then they got bad

same

bitwarden is way cooler

or at least there's just way more options

gray/black/navy/purplish

i always just use flat grey - i don't like tinted dark themes

what's the best way to remember a user's light/dark theme preference?

cookies?

4:38 AM

i do not use cookies and I'd rather not if I don't absolutely have to; localStorage? how does that relate to internet rules/security/whatever

oh...

@hyper-neutrino #2b353a blue-grey lighten-4

i feel like anything else is way more evil and dangerous security-wise than cookies are

cough floc cough

floc is the main reason i finally moved to ff lol

4:40 AM

Vivaldi is a temporary bridge while I wait for DDG

wait wdym wait for ddg

they say they are releasing a desktop browser later this year

> Before the end of the year, we also plan to release a brand-new desktop version of our existing mobile app which people can use as a primary browser.

ooh, that's cool

source

I already have the android app, so when desktop comes out, I'll be fully using ddg

what's the legality for cookies again

if i store data in a cookie, i must prompt for opt-in?

(by GDPR at least; doubt i really need to care for such an insignificant site, but it'd be nice to know even if for the future)

or is that only if my cookies store anything useful rather than just a light/dark switch

Redwolf Programs

4:44 AM

@hyper-neutrino I think so, but nobody would care

I'd just use localstorage

That's not sent to the server

ah okay

loading server-side allows me to just serve the appropriate stylesheet/whatever via jinja2 but then switching themes requires a reload

Redwolf Programs

You could do both

Have it load the right one server side but have the front end JS capable of switching it

That does require a cookie rather than localstorage though

yeah, i think i will just use pure localstorage

> There is an exception to the requirement to provide information about cookies and obtain consent where the use of the cookie is:

(a) for the sole purpose of carrying out the transmission of a communication over an electronic communications network; or

(b) where such storage or access is strictly necessary for the provision of an information society service requested by the subscriber or user.

Redwolf Programs

Oh nice

well technically, storage of this data is strictly necessary for the provision of a service requested by the user, if they choose to dark theme :p

thing is i'd just rather leave my site totally clear of any need to write a privacy policy or tos or whatever

if i really cared i could make my site fully static by just pre-rendering all like 500 pages

725 pages as of right now, apparently

5:13 AM

Don't aim for speed when golfing in Jelly

lol, nice

5:51 AM

My favourite Jelly solutions don't complete within the theoretical heat-death of the universe.

@Bubbler please keep em coming we love your fast answers

Any consensus on passing test cases? Like it has to pass the test cases on TIO? I know it uses two different servers, but it is not about using TIO to time the fastest solution. Just saying hey, code must output the results of the test cases without timing out

yep you can state that in the question

but you need restricted-time tag

Yeye, makes sense =) I know it is not the default

I am slowly trying to trick another community to get into golfing reddit.com/r/vim/comments/oi3dh6/… lol

@N3buchadnezzar well,vim golf is already a thing :)

there's a full website dedicated to competing in it

5:56 AM

Yeah, I need to get into that. However, it seems more focused on replacing text

6:10 AM

CMQ: I have { and } for if statement. What character should i use of the else statement

Use { and }

Embrace the chaos

@N3buchadnezzar no

else should be a single char like :

but i am trying to reserve :

.

ด้้้้้็็็็็้้้้้็็็็็้้้้้้้้็็็็็้้้้้็็็็็้้้้้้้้็็็็็้้้้้็็็็็้้้้้้้้็็็็็้้้้้็็็็็

@RedwolfPrograms ok TNB Looks so bad with this

@N3buchadnezzar what on earth

@PyGamer0 Use that one

6:15 AM

@N3buchadnezzar no

somehting easy totype on a keyboard

@PyGamer0 Æ

I got it on on my keyboard as a letter :)

@N3buchadnezzar bruh that doesnt look like an else

ælse

@N3buchadnezzar ok lets say i have reserved it

how exactly do you structure an if statement with {}

6:21 AM

|?

@hyper-neutrino Like Vyxal I guess

@hyper-neutrino like vyxal

ninjad

@Ausername but wat about bitwise or

true

idk

well vyxal uses [truthy|falsy] so i don't see how pygamer's language would use that if a) it uses {} and b) it doesn't have | available

6:22 AM

Maybe everything is always true

@hyper-neutrino is | used for somethingelse in vyxal?

{truthyæfalsy}?

@PyGamer0 No

| is the structural separator for vyxal

@Ausername maybe

then i would have to remove comments then

no problem though

wait what are you using for comments

also if this is a golfing language comments probably aren't too important anyway

6:24 AM

@hyper-neutrino #

ah

wait why would you have to remove comments then

@hyper-neutrino How do you comment in Jelly

@hyper-neutrino i will change it to an arrow symbol

Vyxal has # for comments, osabie wraps in strings and pops

@N3buchadnezzar you don't really; you can insert no-ops and insert string literals into your code or write stuff and then delete the chain via undefined behavior, but it doesn't have real comments

unlike stack langs you can't really just push/pop so how you insert it depends on structure

or you can just put a string on its own link lol

6:25 AM

ok now comments are ⯈

@hyper-neutrino This is a madman talking

@PyGamer0 Uh...

@Ausername whats wrong

i saw it in a book

Ok....

does this language have a specific design philosophy / unique component? (to be clear it doesn't have to in order to be a good language, i'm just curious)

6:30 AM

@hyper-neutrino i dont know actually

before i started i though of a weird kind of language then i stripped of some hard parts and it turned out to be stack based

for example ī[i+1ṭ]i²ṭ

which translates to take input as integer then for loop, add the input to 1 and print it then after the for loop is over square the input and print it.

7:10 AM

oh no

the jelly string compressor tool not only doesn't handle leading spaces even though they are supported

it doesn't even actually work correctly for some inputs

user image

There should be a badge for this.

what, accepted answer with no votes?

it wouldn't work anywhere else on SE

True

How's ATO going?

codegolf.stackexchange.com/help/badges/34/tenacious

codegolf.stackexchange.com/help/badges/35/unsung-hero

it has not been awarded on this site

What does that even mean

7:15 AM

you have more than 5/10 accepted 0-score answers and more than 20/25% of your answers are like that, i think?

Does anyone over the whole network have it?

that doesn't seem right though

i don't have that many 0 score accepted answers on SO

@Ausername not bad, why? I've not worked on it in a few days

Ok

yes, tenacious has 62.7k on SO and 25.2k unsung hero

7:16 AM

How?

tbh i don't even know what the tag requirements are; the description is pretty useless

yegreed.

7:28 AM

Apparently I tortured myself enough to outgolf Jonathan Allan

→ 36 messages moved to Vyxal

7:49 AM

0

A: Sandbox for Proposed Challenges

Which character to change (Cops) Cops, your task is to chose a program that prints (@Sandbox what string would you like?). Although, if you change 1 character in your code, it should print (@Sandbox?). But there's a twist: You should make your code hard to read, so that the robbers can't find your "

1 hour later…

9:06 AM

Any feedback?

2 hours later…

11:36 AM

Anyone else received the silver "Outspoken" badge when they shouldn't have?

Wdym "shouldn't have"?

I haven't met the requirements to have received it.

With all the joking about beer and coffee, someone might've pushed you over....

7 total starred messages here, 3 in the old Japt chat room. Unless it's cumulative across all site rooms but then it would still be bugged as I should have received it a long time ago.

Maybe an old message of yours got starred by someone who hadn't starred you before?

11:48 AM

¯\_(ツ)_/¯

12:40 PM

chat is very dead today

Is it?

@pxeger So dead, I just hiked for 3.5 hours. So dead.

Trying to figure out how to write a vim plugin..

at least there isn't a 1% chance you get banned with each message.

@lyxal ?

@pxeger discord.gg/2Np6YrQM

12:42 PM

@lyxal invalid invite mate

not my invite

looks like invites are closed

well in a nutshell: every time a message is posted, there's a 1% chance someone gets banned

it's by one of the mods from esoserver

someone, or the person who posted it?

But why?

@pxeger anyone

@N3buchadnezzar social experiments ftw

1:22 PM

CMC : Find the number of all prime numbers p such that
p^2-6
p^2+6
are both prime numbers.

2:02 PM

@N3buchadnezzar Imagine using plugins instead of overcomplicated and unnecessary vanilla macro shenanigans smh

@AaronMiller Want to know a secret?

yes very much so

If you look inside a vim plugin it is just overcomplicated and unnecessary vanilla macro shenanigans

lol

They just use a plugin to hide it

caird coinheringaahing

2:34 PM

@Shaggy If a 10th different user recently starred any of those messages, you would get it

As stars are all but anonymous, it's difficult to tell if you erroneously received Outspoken, unless you have fewer than 10 starred messages

2 hours later…

4:20 PM

what

yeah discord's privacy policy AFAIK allows collection of like pretty much everything

Redwolf Programs

Calling it "spyware" is definitely overboard though

yeah fair

caird coinheringaahing

Stack Exchange knows my favourite programming language, it's clearly spyware

> Any program which does not make its source code available is potential spyware.

This is why all AAA game companies should give out the source code for their games; how do we know they're not spyware?!

4:25 PM

@cairdcoinheringaahing how dare you take my typos away! tehy are mine and mine only!

Redwolf Programs

@AaronMiller I can't tell if you're joking or not (since there could be multiple layers of joke) :p

caird coinheringaahing

@flawr I only meant to add the asymmetric tag, but then I noticed and I couldn't help myself :P

Redwolf Programs

The DRM on a lot of AAA games is basically spyware anyway

Runs at kernel level, tracks everything you're doing, has telemetry, etc.

caird coinheringaahing

CMM: What to do with average? Synonymise with statistics, expand to cover more averages, completely remove it?

Redwolf Programs

I'd synonymize with statistics

Maybe the tag excerpt for statistics should be clarified to say that it includes things like averages, currently it only mentions probability and measurements

4:52 PM

I disagree

average is more specific and still holds plenty of value

caird coinheringaahing

Currently, it's so specific as to not really be useful

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The Nineteenth Byte

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