The Nineteenth Byte

New Main Posts

00:34

1

Prompt: You are given two sets of XY coordinates along with two angles (all are floats): X1 Y1 A1 X2 Y2 A2. The angles are relative to world coordinates: 0 being straight up or north and going clockwise. Your program or function has to return a set of two floats of the XY coordinates the two angl...

Redwolf Programs

00:52

Ugh, spent 10 minutes golfing an answer from 2015 by 17 bytes than realized it failed half the testcases

Actually make that 24 bytes

Unrelated String

:'(

Redwolf Programs

I'm considering writing a working answer, but it'll probably just end up like my xxd answer and nobody'll even see it.

caird coinheringaahing

02:02

Foolproof way to guarantee you triple check the test cases: Dennis has a 4 byte Jelly answer and your Jelly answer is 3 bytes and doesn't use any features added since he posted

Unrelated String

works even when it's kolmogorov-complexity

Razetime

02:46

morning

@RedwolfPrograms so how did the bet go

New Main Posts

03:03

-1

Q: Python if statement not working

I am following a YouTube tutorial: https://youtu.be/1PDyuk84icQ trying to make a math game. The code i copied from the video is not working, if I get the multiplication problem correct I get the "else" trigger. I have tried a different IDE, and reinstalling python. import time import functools ...

python

Redwolf Programs

@Razetime I'll probably never know because my teacher ended up having to quarantine so we did virtual school the whole time. I got a 90% for my grade, so she must have thought it sounded at least a little humanlike :/

Razetime

03:29

so wait

what did I bet on

the teacher discovering it, or not?

Redwolf Programs

I honestly don't even remember :p

Razetime

lemme check

hmm so my winning criterion was that the teacher would notice

Dec 2 at 2:50, by Redwolf Programs

Just suspect that I didn't write it :p

so you win it lol

Redwolf Programs

Probably wouldn't have had the same result if I used the next result I'd gotten, "Swindle this man's despot eye thee, and the ivory saws others came too heavy cannon whale" :p

Razetime

cool

which answer do you want a bounty on

Redwolf Programs

03:44

This one

We'd agreed on 50 rep, right?

Razetime

it was 100

done!

Redwolf Programs

Thanks!

I think that's one of the more entertaining bounty messages I've seen :p

Razetime

SE should allow adding bounty messages to answers

like when you hover over the +100 it should show the message

maybe I'll request that in codidact

Redwolf Programs

I wonder if SE stores the bounty messages. Maybe it'd be possible to make a userscript

Razetime

checking api

Redwolf Programs

03:56

Odd, the bounty message doesn't show up in the timeline, seems like the "comment" field to the right would be the perfect place for it

It's not in SEDE either

Razetime

It only seems to have a featured questions thing

but no bounty message thing

Redwolf Programs

Might be worth suggesting in meta, that would be a pretty cool feature

Razetime

@sporeball still looking for the coordinates question?

sporeball

haven't heard that sound in so long that it scared me

yes, i'm still looking for it

Razetime

oh the twang sound when you get mentioned

Newly Featured Questions

04:06

15

Q: Reversible hex dump utility (aka `xxd`)

xxd is a utility, bundled with vim, that has been used to encode answers to code golf problems on this site. It converts a binary file into a hex dump and back again. Implement the xxd and xxd -r commands in the programming language(s) of your choice. Scoring is based on the character/byte lengt...

code-golf

Razetime

there's so many coordinates questions

time to learn SEDE

Redwolf Programs

04:21

This has the most fascinating google trends region map I've ever seen...from the numbers one to five, there seem to be certain regions with more interest in one of them than normal.

One = Southeast Asia
Two = South Asia
Three = Ireland/UK
Four = West Europe
Five = Africa

Bubbler

04:41

@Razetime Learning SEDE is essentially learning SQL with a couple extra features.

pppery

It's very useful

In fact, SEDE queries are the primary way I find invalid answers to flag.

Bubbler

It's a primary way to find old questions to answer in certain languages for me

Redwolf Programs

10:00 to AoC #5!

9

pppery

8

7

Redwolf Programs

6

Lyxal

04:54

6

dang it

Redwolf Programs

lol

pppery

5

Lyxal

wow way to screw me over se chat

i had "posted" 5 and it said "unexpected error"

Redwolf Programs

I'll let you have the next one

Lyxal

4

finally lol

Redwolf Programs

04:56

What's the little drawing by the numbers?

pppery

what?

Redwolf Programs

3

Lyxal

3

pppery

3

Lyxal

dang

Redwolf Programs

04:57

The ASCII art by the countdown

pppery

3 3s. Isn't that magical

Lyxal

@RedwolfPrograms it's usually some sort of image that you see completed at the end

like one year it was a tree

2

pppery

Hey! You were several seconds early!

Lyxal

1.5

@pppery you gotta be quick to survive in these parts

Redwolf Programs

I like how competitive this has gotten :p

1

Bubbler

04:59

I won't be surprised if a chat mod kicks in and moves all these countdown chat to trash

Lyxal

@RedwolfPrograms now y'see, I woulda won if not for my internet temporarily dropping out

Redwolf Programs

.5

pppery

@Bubbler Why?

0

Redwolf Programs

502

nvm

Unrelated String

I choked so hard on part 1

Bubbler

05:07

Yessssssss

249/211

Unrelated String

and then had server issues on part 2

Lyxal

Okay I ain't getting top 100

Unrelated String

feels good

Lyxal

@Lyxal I sent that 6 minutes ago

Unrelated String

I got R and L backwards on part 1 lmao

Bubbler

05:08

I tried to make the FBLR right while my test case was loading

ASCII-only

:D

Bubbler

and it was big success

ASCII-only

i got 11th and 20th

the funny thing is im not even on pc rn

@UnrelatedString its ok i choked hard too

Unrelated String

deadass kinda wish i'd used a golflang for once
because binary is a biiiit easier in a golflang

ASCII-only

i got f aand b mixed up

Redwolf Programs

05:09

Done

ASCII-only

bruh i had to use devtools

try doing that

Unrelated String

okay wait it's not just server issues because my message there just failed to send lmao

ASCII-only

on mobile data too :( not being at home kinda sucks

Redwolf Programs

519/402 :/

Unrelated String

something went wrong with my internet the moment i hit submit on par 2

t

ASCII-only

05:10

anyway i came here cuz i tied with hyperneutrino

where'd he go anywya

pppery

same thing happened to me

Unrelated String

oh oh you know what i could have done instead of four fucking replaces

pppery

no, it's just AOC being slow

ASCII-only

oh yknow what

Unrelated String

i could have used join lmao

with str

ASCII-only

05:11

i completely messed up part 2 the first time

Redwolf Programs

I used f=(s,n=0)=>(s[0]=="B"&&(n+=2**(s.length-1)),s.length==1?n:f(s.slice(1),n)); to find the row/column numbers

ASCII-only

fun.

Unrelated String

@ASCII-only same

pppery

same as well

ASCII-only

lul

Unrelated String

05:11

i did not catch that yours is not on the pass

ASCII-only

ya same

pppery

228 on part 1, 629 in part 2

Bubbler

Python has str.translate, no?

pppery

It does

but it was easier to do 2 replaces than futz around with translate.

Lyxal

wait a minute

just hang on a second

ASCII-only

05:12

hey, i did 2 replaces too

Lyxal

i can just convert the strings from a bijective binary?

Unrelated String

it's not bijective binary

it's just binary

Lyxal

frick

ASCII-only

lmao

Bubbler

not even bijective, it's simple binary

Redwolf Programs

05:12

What...

I wasted SO much time

Lyxal

and everyone else it doing it the easy way

fml

Here's me trynna do it with lists

Unrelated String

lol

ASCII-only

lol

Redwolf Programs

I used a recursive function and thought I was doing it the smart way :/

Bubbler

The entire wall of text is vaguely but gradually indicating that

pppery

05:13

I fell from 2nd to 3rd on the private leaderboard

Unrelated String

if python had nice functional support then you could just use a fold to convert

ASCII-only

i wonder how i got so high today tho

Unrelated String

but no

Bubbler

I'd do str.translate then int(xxx,2) if I'm on Python

Unrelated String

wait there's a str.translate method

i used four replaces

pppery

05:14

me too

ASCII-only

i used js like a normal person

so i used two replaces

reduce and map would probs work too

Bubbler

For JS I'd do one pass of reduce, yeah

Unrelated String

hell i might have gone faster in haskell

Bubbler

This time I'm pretty sure many novices are failing to see it's binary

ASCII-only

but are there that many novices on the leaderboards

Bubbler

05:16

(and we're all smart in that respect)

Unrelated String

i'm on a voice call with one

pppery

@Bubbler That's ridiculous. It's even in the title of the day

> Day 5: Binary Boarding

Unrelated String

he actually started at midnight for once

and he's still on star 1

ASCII-only

funny thing is i only read the spec till im sure enough that i get it right

Lyxal

"Binary Space Paritioning" doesn't exactly lead one in the right direction

ASCII-only

05:17

for me it was the 8 seats per row that confirmed it

oh wait

Unrelated String

he was about to do slices until i pointed out how the id is determined

ASCII-only

today was enough to get me onto all time leaderboard???

Unrelated String

nice

~~day 2 was enough to get me there~~

ASCII-only

@Lyxal ok sure "Binary Space Paritioning" doesn't, but 128 rows and 8 seats per row is a bit more of a giveaway

Bubbler

Ooh, I'm slowly rising in the private leaderboard

ASCII-only

05:21

tbh i forgot this leaderboard even existed

Lyxal

I was more focused on the idea of binary searches than binary bases

@ASCII-only "keeping rows 0 through 63" doesn't exactly lead to the thought of binary either

Redwolf Programs

Yeah, I didn't even think about it

Bubbler

: seatcode ( string -- value )
  "FBLR" "0101" zip substitute bin> ;

: day5-silver ( strings -- highest )
  [ seatcode ] map supremum ;

: day5-gold ( x -- y )
  [ seatcode ] map dup minmax [a,b] swap diff ;

unfactored code for today

ASCII-only

@Lyxal hey i mean binary search is binary base

Lyxal

@ASCII-only not the way I learnt it

ASCII-only

05:22

@Bubbler what's this

Lyxal

I know it as: cutting a list in half until the needle is found

Bubbler

Factor

Unrelated String

1509 people have completed star 1 but not star 2

ASCII-only

bruh

how though

Lyxal

they're probably mentally thrown/discouraged from part 1

Bubbler

05:24

"cheated" star 2 by creating a range of [min,max] and set diffing

ASCII-only

i literally used the most naive way

Redwolf Programs

Not everyone's rushing to be on the leaderboards, and not everyone's fast at typing and/or problem solving

pppery

True

ASCII-only

ah well

either that or i guess they didn't make a seat -> id conversion in part 1

Redwolf Programs

For part 2 I just got the min and max, made an array for each value in between, and then did a .find for the the one that didn't exist in the input

ASCII-only

05:26

for part 2 i messed up and found the max was 860

Lyxal

ugh finally done

ASCII-only

(since that was where the console.logs ended)... and i just set max to that, changed to a doesn't contain search instead of a contains i - 1, i and i + 1 search

Lyxal

with about 5 internet dropouts, 2813/3344

Redwolf Programs

Every time I loaded a page it took like 20 secs

Lyxal

It's like they're trying to screw up people's boilerplates

I haven't use parts from other days at all

The inputs have all been formatted differently

Unrelated String

05:29

what kind of boilerplate are you trying to use

it's always like this

ASCII-only

i have boilerplate to split by line but

Unrelated String

except for yesterday those empty lines threw me for a loop lmao

ASCII-only

im not on pc so didn't have any boilerplate

at all xd

Lyxal

@ASCII-only that's my setup too

pppery

when I did AOC in 2019 the only parts I ended up reusing on two or more days was the intcode interpreter and a BFS algorithm.

ASCII-only

05:30

@Lyxal then it's fine here, no?

Unrelated String

my boilerplate is the one line ls = [l for l in iter(input,'')] which is a comprehension so i can stick somrthing else in there on the fly lmao

ASCII-only

i have the most cursed boilerplate ever

i can link to past days' solutions but idk what stance is on linking spoilers here

Unrelated String

@pppery and even then, half the time you weren't just feeding the input straight to the intcode interpreter

Lyxal

My crappy first attempt at part 1

Unrelated String

there is no such thing as a spoiler here
we are all Fast™️

ASCII-only

05:32

cursed solutions here

Unrelated String

@Lyxal cringe.py is an appropriate filename

Lyxal

@UnrelatedString that's why I named it so

Redwolf Programs

My speaker has just given up on producing the twang noise for every comment at this point

Unrelated String

lol

@ASCII-only are you making a point of not using newlines or is the website just eating them

ASCII-only

i dont use newlines

Bubbler

05:34

The only valid boilerplate is the one that reads a file in full, two solution function skeletons, and a script that runs them on the file

ASCII-only

cuz im cursed

heres day 5 guys remember not to cheat

Redwolf Programs

I just do even more cursed ES6 one liners

ASCII-only

thats my entire console history lol

Unrelated String

lmao

ASCII-only

@RedwolfPrograms you dont understand did you not see the one letter function names

oh also look at like the day 1 solutions

eval ftw

Redwolf Programs

05:36

.map(Number)? Isn't .map(n=>+n) shorter?

Unrelated String

maybe slower to type

depending on the typer

Redwolf Programs

At this point I just need to bind my unused keys to map, filter, and =>

Unrelated String

yeah

ASCII-only

yea i type words better than i type complex expressions

don't even need .map(Number) really as any self-respecting js golfer can tell you, just use - rather than +

Redwolf Programs

Wait, would .map(eval) work?

ASCII-only

05:38

yes

Redwolf Programs

Dang, time to go back and golf half my JS answers on the site

ASCII-only

o_o

Bubbler

I usually don't golf my existing answer until someone else points out

Oh, 100k solvers for day1 part2. That's a record

ASCII-only

while on the topic of your js answers... for the reversible xxd one i feel like using ((i,j)=>i.toString(16).padStart(j,0))(i,7) might be shorter. who knows

Redwolf Programs

For what part of it?

ASCII-only

05:47

you use it twice, one with 7, once with 2, not at pc so cant properly test if its shorter

similarly, for l>31&&l<127?String.fromCharCode(l):"." the && can most likely be replaced with &, the String.fromCharCode can maybe be moved outside the ternary: String.fromCharCode(l>31&l<127?l:46)

Redwolf Programs

Already got that golfed, and I think your first idea should save a few bytes

ASCII-only

oh wait

(j=>i=>i.toString(16).padStart(j,0))(7)(i)

then just call it with 2 for the second time, removing the second lambda entirely?

Redwolf Programs

Didn't think about that

Actually it looks like the curried one is the same length since it's called twice and takes an extra byte to call

Wait never mind, I get what you mean with calling it with 2 for the second time

New Main Posts

-1

Q: Formula Manipulation?

I have a formula => a^2 + b^3 = c^2. How would I print the values of a and c, such that it works with the formula above, also the value of b is given. Example: B = 3; 3 ^ 2 + 3 ^ 3 = 9 + 27 = 36 = 6 ^ 2, so we print 3 and 6 [If there are several solutions, print any one of them - doesn't matter.]

c++

Razetime

finished part2 yay

ASCII-only

05:58

:o that took a while

Redwolf Programs

Looks like those changes saved 8 bytes

ASCII-only

~~TIO says 10~~ wait no thats when counting the charcode changes you alr did

Redwolf Programs

And also broke stuff

I must have messed it up

ASCII-only

tio.run/##TU9Nb8IwDL33V6BqQs6apZ/…

Redwolf Programs

Oh, I got the j and i backwards

ASCII-only

06:02

oh the /16 is nasty

Razetime

@ASCII-only had breakfast lol

ASCII-only

tio.run/##TU/…

there

Razetime

Not really competing for ranks anyway

ASCII-only

-8 bytes

Razetime

Nice to meet you @ASCII-only

ASCII-only

06:03

hey

-5

Razetime

charcoal's a fun language

I've used it a little

ASCII-only

abandoned tho. f

Redwolf Programs

@ASCII-only Thanks for all the golfing help, looks like a total of 20 bytes were golfed down

ASCII-only

another -2?

Redwolf Programs

What was the change?

ASCII-only

06:14

decode, [^:] -> <space>.

ok so not 100% sure that one works lol (edit: probs doesn't)

Razetime

@ASCII-only happens, still competitive tho

ASCII-only

"competitive" :p

Razetime

anyway, what brings you back here? :P

ASCII-only

just the aoc leaderboard

Razetime

nice

ASCII-only

06:17

i literally tied (same second) with hyperneutrino so i came back here

Razetime

somedbody1234

tckmn is really fast

ASCII-only

kinda is. in my defense, half the time i start a couple mins late

Redwolf Programs

Just found a way to golf another byte but I really don't want to edit the post again :p

ASCII-only

wanted to do some cool matchAll flatMap golf but turns out it's longer :(

Razetime

06:33

@RedwolfPrograms ok I'll edit it lol

Redwolf Programs

It's fine, I'll do it in the morning :p

sporeball

06:49

i was playing Splatoon 2 until 25 minutes in AND i'm a slow problem solver. this is not ideal

i think on this leaderboard i'm going to end up staying in last place, among those of us who continue to solve all the puzzles on time, for the rest of the month

Razetime

@sporeball no I am competing for last place as well

sporeball

i had this tab open waiting for you to respond and the sound STILL scared me

help

Razetime

@sporeball mute all audio

sporeball

what a concept

Razetime

I know

very helpful

Unrelated String

07:10

@sporeball ayy

sporeball

hiya

Lyxal

@sporeball get pinged.

sporeball

this is the most pings i've ever received

Lyxal

@sporeball would you like more?

@sporeball because I can give you more

@sporeball and I've got a friend who can help me give you more

sporeball

depends on if anyone asks you to stop

Lyxal

07:36

@sporeball are you gonna ask me to stop?

sporeball

i really don't care too much, but somebody else may very well call it "too many"

Lyxal

@sporeball well I'm gonna wait until then

Unrelated String

08:15

@Lyxal lol

Lyxal

08:49

Oh lol there's barely anyone here

Nevermind someone just came in

Razetime

hi

Lyxal

Maybe that's how one makes a room more active.

Comment on the emptiness and someone enters

Razetime

maybe

doesn't work on discord somehow

Lyxal

Have you tested it?

Razetime

lot of times

Lyxal

08:54

Ah

Razetime

just makes people wanna be even more quiet

Lyxal

Well maybe it's a StackExchange thing.

Actually maybe it's just a TNB thing

Razetime

hmm who knows

Lyxal

Me

I tested my theory in another chatroom

But nobody came

Razetime

good research

Lyxal

08:57

Yes

Lyxal

10:29

I got the 69th star on the seriously repo

Unrelated String

Nice

Neil

10:59

huh, even Raymond Chen is citing MDN as a source. Does MSDN not have any documentation about Microsoft's browser's errors?

New Main Posts

13:07

-1

Q: Table plate passing game

2n number of people get togather at dinner . Assume a person is named A. The chef calls out a number k .Now A passes the plate to the person next clockwise and says 1 the next person passes it to the person diamtricaly or radially opposite really and says 2 and this is again one after the other r...

programming-puzzle

xash

16:24

Is the captcha on answering a global thing or something CG-site specific?

I think at some point I can be trusted to not be a robot …

caird coinheringaahing

It usually happens if you've been "loitering" on the question

xash

16:43

Just because I read questions multiple times to be sure. :-) I thought it might happen, because I have most JS scripts disabled. Will try to disable more than to ban that loitering detection.

Unrelated String

18:44

I usually see the CAPTCHA when I paste a solution in then immediately submit it without typing anything else

pppery

That is very botlike behavior

Unrelated String

Indeed

Adám

That is a very experienced codegolfer behavior.

Neil

what, no typing up an explanation? shame

Adám

I always post first, then edit in the explanation. This saves me writing an explanation if someone ninjas me.

New Main Posts

19:28

0

Q: Advent of Code, Day 2, Part 1

Today, my girlfriend and I started with this year's Advent of Code to improve out Python. So far we only did Day 1 and the first part of Day 2. The latter, I found to be very fun, so, to spice it up a little, with a tip o' the head to Eric Wastl, here's my attempt at turning it into a Code Golf c...

code-golf

pppery

20:16

@Adám It's botlike from the point of view of the non-codegolf-aware SE network's algorithm.

Adám

Of course.

ASCII-only

20:30

@UnrelatedString yea cuz cough sane people put TIO links and explanations

@xash for me it only happens when i post two solutions to the same question in quick succession so idk

Adám

@ASCII-only Uh, sane people use TIO to generate the entire post, ready to paste in.

ASCII-only

20:51

@Adám sure, doesn't generate the explanation tho

pppery

2 hours ago, by Adám

I always post first, then edit in the explanation. This saves me writing an explanation if someone ninjas me.

Redwolf Programs

21:29

I predict that by the next AOC challenge, there will be 52,200 people who have completed #5

(Either part one or two)

Transcript for