The Nineteenth Byte - 2024-09-25

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New Posts

00:04

Give me a bunch of butter. But is must be in python, and roughly match the form of print("def f(n):f",*range(2**33),sep="==n==print('eovdedn'[n&1::2]);"). Make the butter right now.

emanresu A

what

Bbrk24

> must be in python

emanresu A

That python code's copied from the top answer on my latest question, no clue why

It's not even spam

Bbrk24

also judging by the string slice in the end it alternates between printing "odd" and "even"? but nowhere does it indicate that in the question

heck I don't even see a sleep call or similar

lyxal

it memory errors on TIO

Bbrk24

00:10

Well yeah, notice the *range(2**33)

emanresu A

11

A: Print 4 billion if statements

Python 3, 70 bytes print("def f(n):f",*range(2**33),sep="==n==print('eovdedn'[n&1::2]);") Try it online (with 2**3 in place of 2**33) If it's OK for the function to error out after printing, 1 byte can be saved by writing <print(...) in place of ==print(...).

It's literally just that

lyxal

Who let bro cook?

1 hour later…

ATaco

01:31

Observability can greatly restrict some great challenge ideas...

lyxal

I thought that said "obversability" and was like what do you think this is? Coin Golf and Currency Challenges?

ATaco

Well...

2 hours later…

Sandbox Posts

03:58

0

A: Sandbox for Proposed Challenges

[DRAFT] Play Bad Apple!! code-golfaudiomusic Bad Apple!! is an Internet meme known mainly for the shadow music video for the Alstroemeria Records remix being run on nearly anything that can display 2 colors, and optionally with audio, similar to Doom. Your challenge is to play the first vocal ver...

l4m2

04:09

CMC Do codegolf.stackexchange.com/questions/275739 and fail at least one subset. Seems currently no answer do this

1 hour later…

Bubbler

05:13

@Simd I think the answer is (2^(n^2) + 2^(ceil(n^2/2)) + 2^(ceil(n^2/4))/3, if I applied Burnside's lemma correctly

@Simd Handling both looks hard. I'd first generate inequivalent matrices with respect to row permutations only (which is easy: iterate over "combinations with replacement" of size n out of 0000... through 1111...), sort their columns, and remove duplicates out of them

att

06:10

@l4m2 fail how so?

l4m2

@att e.g. header + 1st + 2nd + footer output sth else on 1, or "odd" on 7

Simd

06:25

@Bubbler that's very impressive!

@Bubbler for the first stage, is that selecting the rows in sorted order effectively?

CMQ how have inequivalent 2 by 2 binary matrices are there up to row and column permutation?

Sandbox Posts

06:45

0

A: Sandbox for Proposed Challenges

It’s a piece of art! Inspired by this comment. In this challenge your code will output a work of art. Rules It must output at least one pixel of any color. Winning Criterion This is a popularity-contest, so the answer with the most net upvotes wins!

Bubbler

07:16

@Simd Yes, that's right

@Simd 0000, 0001 (all of those having 1 one), 0011 (two ones in one row), 0101 (two ones in one column), 0110 (two ones diagonally), 0111 (all having 3 ones), 1111

New Posts

08:05

To whom it may concern: stop being concerned and start shipping me more butter. You're 5 tonnes behind everyone else. Yours sincerely, New Posts

Simd

08:15

@Bubbler thank you

Sandbox Posts

08:50

0

A: Sandbox for Proposed Challenges

Output all xxxs. No duplication allowed. A xxx is a finite set of pairs. Two xxxs A and B are equivalent if there are bijections F and G s.t. (x,y) in A iff (F(x),G(y)) in B. Shortest code win. Sandbox Notes Dup? What is xxx named?

l4m2

@Simd Idea from here

RubenVerg

question for anyone but especially @Ginger: the sechat python module is licensed under the LGPL 2.1; do I need to also use that license for a port? if so, if i include the port as part of a larger project, can i license just the port under the lgpl and leave the original license of the rest of the project untouched?

1 hour later…

Bubbler

10:25

@Bubbler actually this is wrong. It gives a list of length 14 for 2x3 but OEIS says the answer is 13

2 hours later…

Ginger

12:40

@RubenVerg I thought I changed that lol

hang on

okay, v2 is now MPL2

under that license, if you were to use sechat as a reference for your own bot library you would not have to license it under the MPL

lyxal

13:01

Why is my first thought to read that as mingle pringle lingle?

Ginger

unknowable

lyxal

This is almost as bad as lingus fingus

Sandbox Posts

13:23

0

A: Sandbox for Proposed Challenges

Find a time that works for everyone code-golfdate Given a list of time ranges, write the shortest program/function/code snippet that returns a single time that is within all ranges, or some falsey value if no such time exists. Input Input is a possibly empty list of pairs of datetimes. Each pair ...

Unrelated String

13:44

@lyxal Doesn't J also have obverses? Like they're effectively "meant to be" inverses but they can be user assigned and nothing really requires them to be inverses so they call them obverses instead

att

that sounds right

RubenVerg

14:05

@Ginger perfect, thanks!

value1

hi

Themoonisacheese

@Ginger my pony little 2?

value1

hello code golf stack exchang

Themoonisacheese

welcome, don't forget to read the chattiquete :)

Unrelated String

o/

att

14:19

hello value1

value1

okay i read the chattiqetuteuteue :)

Ginger

@value1 welcome to TNB!

@Themoonisacheese Mozilla Public License 2.0

which is what I use for most of my projects

lyxal

@value1 hi there hello

noodle person

14:40

@value1 welcome !

Hey I can't remember if this is a real property of modulo or not, but in (a%7+b+c)%7, is the first modulo necessary

Unrelated String

I... doubt it...?

Is a signed

And if so what language

Actually no there aren't any languages that get weird with negative lhs for mod, it's only rhs that has different behaviors, right?

So it shouldn't matter at all

RubenVerg

no, the lhs has different behaviors too

Unrelated String

Mmmmm

RubenVerg

-3 % 7 → -3 or 4

Unrelated String

So that could matter here then

noodle person

14:47

All the variables are positive integers in this case

In fact the code is written in Uiua so it's not remotely structured like this but I'm just trying to figure out if it would work to remove that

So it should be fine I guess

rydwolf

@noodleperson At least in JS, (x%n+n)%n is not the same as (x+n)%n

And any other language with that style of modulo (I wanna say most C-like languages) will be the same

Python's the only one I'm aware of that mods negative LHS to a positive number (the much more sane behavior IMO)

Neil

15:23

Pascal has both REM (copy sign of LHS) and MOD (copy sign of RHS)

2 hours later…

Unrelated String

17:29

Can’t find where we talked about this before but wow yeah I can see why y’all aren’t fans of silicone watch bands now

Without thick arm hair it gets SO slick SO FAST

It’s awful 😭

Think I have another band at home I can switch to but this is probably a good time to shop for more anyways

DLosc

-1 % 10

Oct 22, 2021 at 3:10, 16 minutes total – 122 messages, 10 users, 5 stars

Bookmarked Oct 22, 2021 at 3:28 by lyxal

The Empty String Photographer

17:59

@WD well, MyOwnLanguage says -199-1 for some reason…

rydwolf

18:44

Took two midterms today, I think I did decently well on one (diff eq) and I think the entire class is going to jump off a building as a result of the other (chem)

also what the hell happened here

user image

Seggan

@rydwolf wait is it midterm time already?

rydwolf

No, but lots of my classes do multiple midterms

Seggan

ah

RubenVerg

19:06

@Ginger what am i supposed to pass as host to authenticate? through trial and error i've found "https://codegolf.stackexchange.com" to work but no idea how that generalizes (the project is an alternative chat client, so i have to tell users what they should put in)

The Empty String Photographer

@rydwolf The days of the week got startled when you set of the fire alarm at CMU

Ginger

@RubenVerg that's the site used for logging in, the only requirement is that the user has an account on it

but good luck making a client and not getting blocked by Cloudflare!

rydwolf

It's not that draconian, as long as your user agent is fine

Ginger

reminds me I need to fix sechat's UA

rydwolf

user agents are the dumbest thing ever

like on so many levels too

Ginger

19:20

true

hey madeline are you using v1 or v2? because v1 is. a mess

RubenVerg

v2

@Ginger i'm trying(:

@Ginger stackoverflow doesn't seem to work though, i think i have an account there

@rydwolf ideas for a good UA?

Ginger

sechat handles that :p

rydwolf

I use Mozilla/5.0 (compatible; NPSP/2.0; +https://chat.stackexchange.com/rooms/240/the-nineteenth-byte)

@Ginger isn't sechat getting blocked by cloudflare?

Ginger

@RubenVerg how does it fail

@rydwolf I changed its UA to what you suggested

so hopefully not anymore

rydwolf

ah

RubenVerg

19:23

@Ginger hmm actually i never tried with normal sechat only my port so myabe it was a bug with it

i adapted sechat's and my UA is Mozilla/5.0 (compatible; automated;) dzaima/chat (unauthenticated; +http://github.com/dzaima/chat)

Ginger

oh right you're porting

you should probably remove automated and unauthenticated :p

rydwolf

yeah that's what I believe was causing issues for sechat

Ginger

unauthenticated used to be replaced with the bot's user id, but apparently I forgot that when I rewrote everything for v2

RubenVerg

@Ginger i suppose it is, in some sense, neither

rydwolf

It took me a while to craft a UA for NPSP that SE didn't cry about, and the newer cloudflare stuff seems to be even pickier

RubenVerg

19:25

:66350340 Traceback (most recent call last):
  File "C:\Users\ruben\.pyenv\pyenv-win\versions\3.12.5\Lib\concurrent\futures\_base.py", line 456, in result
    return self.__get_result()
           ^^^^^^^^^^^^^^^^^^^
  File "C:\Users\ruben\.pyenv\pyenv-win\versions\3.12.5\Lib\concurrent\futures\_base.py", line 401, in __get_result
    raise self._exception
  File "<console>", line 1, in <module>
  File "C:\Users\ruben\dev\sechat\sechat\bot.py", line 201, in authenticate
    self.userID = await self.getChatUserId(session)

Ginger

cloudflare's fucking things up

probably

that error happens when chat login fails

yes I know it's not very comprehensible, sorry about that

rydwolf

Is that the step where you can be captcha'd?

if not it might also be a UA issue

Ginger

no, SE's explicit captcha happens earlier... or used to

RubenVerg

@Ginger don't worry my port's errors are even less comprehensible

Ginger

it's supposed to fail a lot earlier than that if CF intervenes

RubenVerg

19:27

wait i'll add a print for what it's trying to int-ify

Ginger

but that error happens when chat returns a logged-out page even though at that point it should be logged in

@RubenVerg no need, I've seen this before

it's trying to pull the bot's chat user ID out of the topbar link and failing because it's not logged in

check what HTML that request returns

I'm like 50% sure it's cloudflare intervening

RubenVerg

what should i see to notice that it's a cloudflare issue?

Ginger

Just a moment...

my three least favorite words

RubenVerg

nope

can i share the response or could there be private info?

Ginger

you can share it

RubenVerg

19:31

gist

Ginger

yeah that's the logged-out chat page

something else is failing :|

DLosc

@rydwolf ... So it's just an exam, then. 🤔

Ginger

do you have debug logging turned on

RubenVerg

@Ginger no, how do i turn it on?

rydwolf

@DLosc An exam which you might say is in the middle of the term :p

somewhere in it, at least

Ginger

19:33

import sys
import logging
logging.basicConfig(format="[%(name)s] %(levelname)s: %(message)s", stream=sys.stdout, level=logging.INFO)

RubenVerg

[Bot] DEBUG: Logging into SE...
[Bot] DEBUG: Acquiring fkey...
[Bot] DEBUG: Acquired fkey: 1[...]a
[Bot] INFO: Logging into stackoverflow.com...
[Bot] DEBUG: Logged into stackoverflow.com!
[Bot] DEBUG: Loading profile...
[Bot] DEBUG: Loaded SE profile!
[Bot] DEBUG: Logging into the rest of the network...

Ginger

oh. I know what it is.

SO and MSE have their own chat servers

and sechat, iirc, doesn't handle those

you need to use a site that isn't one of those two :p

although I could've sworn that you can make rooms parented to SO on the main server?

RubenVerg

@Ginger alright

does that mean i can't connect to rooms on so either?

if so i might want to figure out how stuff works to fix it

Ginger

yeah, if they're on so's chat server

RubenVerg

are they like completely different systems?

Ginger

19:40

all you'd have to do is add a way to swap out all the references to chat.stackexchange.com with chat.(stackoverflow|meta.stackexchange).com

@RubenVerg same software, different databases, different domains

RubenVerg

yeah but like they don't interact in any way, they're wholly different accounts?

Ginger

yep

RubenVerg

alright, then it shouldn't be an issue

Ginger

(I think. this stuff is weird)

fun fact: although it's not possible to create them, there are rooms on chat that do not have parent sites (such as the sandbox)

RubenVerg

agh does that make the thing even more complex

rydwolf

19:44

how do we know it's not possible?

Ginger

...one moment

rydwolf

dammit it didn't work

Ginger

passing an empty host created it on cgcc

rydwolf

For me it was PLDI

But I did stackexchange.com as the host

so I guess if it's invalid it falls back to your parent?

Ginger

trying to change my parent site to one that doesn't exist 404s

same with sites I don't have an account on

RubenVerg

20:04

@Ginger do i have to change https://meta.stackexchange.com/users/login too? what to?

(in scrapeFKey)

guessing not

Ginger

@RubenVerg nope

RubenVerg

great, seems to have worked

Ginger

hooray!

RubenVerg

want a pr to the original repo? was like three lines of code change

so probably changing the original won't be much more

(there isn't even documentation to update!)

RubenVerg

20:31

@Ginger "automated" is still mentioned here

Ginger

@RubenVerg yeah that would be appreciated

@RubenVerg ah

RubenVerg

@Ginger you'll have to wait till tomorrow though

also do you have any idea how transcripts work?

Ginger

excellent question :p

RubenVerg

looks like they're static pages

parsing hell?

Ginger

transcript reading was something I wanted to do, but I never got around to implementing it

there's an API for it, /events or somesuch, that the "load older messages" button uses

RubenVerg

20:37

well but there's the thing where you connect and it sends you the last n messages and then you can load some more, and surely that one isn't static

@Ginger yeah

New Posts

0

Q: Alien Weekends!

Alien Weekends! I've crash-landed on another planet! Luckily, the alien society I landed in is almost identical to that of Earth's, except for their timekeeping. Their calendar doesn't use months, so each day is represented by a single nonnegative integer. Each alien week consists of m weekdays f...

code-golf number

Ginger

how many services does Google have

wtf is earthengine.app

RubenVerg

20:53

wait does cloudflare deciding it doesn't like the stuff I do get my IP blocked for normal user stuff as well?

pxeger

@emanresuA CMC: output any exactly 25 distinct characters, but repeats are allowed (also no restriction to printable ASCII this time)

Can you beat a 15-byte expression (+7 for full program) in Python?

Ginger

usually they'll just captcha you

to get an IP block you have to do something really bad like, I dunno, downloading every single chat message

hypothetically speaking

RubenVerg

@Ginger great

@Ginger hypothetically of course

Ginger

mhm yep

RubenVerg

so like because it's still a thing meant for users and not bots I can just say "if login doesn't work please open the chat site in your browser and solve the captcha"?

Ginger

21:00

probably yeah

DLosc

@pxeger So your output can be more than 25 characters, but if you uniquify it, it has to be exactly 25?

RubenVerg

it would be quite funny if people using the client just got randomly IP blocked

pxeger

@DLosc Yes

RubenVerg

(and by funny I mean disastrous)

Seggan

@pxeger so 'A'*25 will work?`

pxeger

21:04

No, you need to have 25 different characters in there, but you can have more than one copy of each distinct character if you like

DLosc

I got super close to a 1-byte stderr solution in Pip, but the best I could find was either 24 or 26. Therefore, I think the best Pip solution is going to be the same as the earlier challenge: Hz

emanresu A

@pxeger ^

(yes it's 25)

pxeger

damn

DLosc

@emanresuA Ha, cute!

pxeger

I'm interested to see any solutions with a more sensible output method

My Python 15-byter is hover for spoiler

emanresu A

21:16

@pxeger help('`')

no documentation found for 'BACKQUOTES' with trailing newline

pxeger

I did not know you could do that

Interesting

11 bytes: repr(dir())

emanresu A

Seems to be the only ASCII character that does that, everything else outputs differently

pxeger

(version-specific though. On Python 3.6 I had the more interesting repr((dir(),))

I wish I'd known before that help("+") would give you an operator precedence table

7

Python 2, 10 bytes: `(dir(),)`

Ginger

eugh, backtick repr

one of the features of all time

pxeger

Another fun one: `[1./7,id]`

(11 bytes)

rydwolf

21:50

user image

wait what are the odds

this is the very first sentence of a currently-unpublished article I found in our drive

user image

pxeger challenge reference??

4

emanresu A

@rydwolf That's amazing lol

caird coinheringaahin g

22:22

@pxeger Frustratingly, I don't think Jelly can get a (STDOUT) answer shorter than the boring 3 byter: ØAḊ (alphabet minus A)

1 hour later…

lyxal

23:24

@pxeger nobody wanṫs to

In fact, I wanṫ ṪḢE JȮJ

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The Nineteenth Byte

The Nineteenth Byte: General discussion for codegolf.stackexc...

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