The Nineteenth Byte

Mr. Xcoder

2:00 PM

@cairdcoinheringaahing I have no idea what you are talking about, TBH

Erik the Outgolfer

@Shaggy don't messenger services have audio/video calls?

Shaggy

Speaking of potential challenges, I'm still looking for feedback on this before I post it - the last question at the top of the page, in particular.

5

A: Sandbox for Proposed Challenges

Coat of Many Colours code-golf array-manipulation Sandbox Anything not clear enough? Tag suggestions? Suggestions for test cases? Is it close enough to this to be considered a dupe? I need a better song title! It doesn't necessarily need to be from Joseph. I'm an idiot! Sho...

@EriktheOutgolfer They do?

Mr. Xcoder

Ok, Leaky helped me shave off a staggering 11 bytes

Helka Homba

So this is weird, shred your comments live: youtube.com/watch?v=vXwb_7DdZeQ

caird coinheringaahing

@Mr.Xcoder Ok, I've changed it, could you take a look at it?

Mr. Xcoder

2:05 PM

@cairdcoinheringaahing Let me finish explaining the new Pyth approach, and will take a look

caird coinheringaahing

@HelkaHomba +1 for the speed of comments being posted :)

Mr. Xcoder

@cairdcoinheringaahing So now it's kolmo-complexity?

caird coinheringaahing

@Mr.Xcoder Yes.

I think the inclusion of a multibyte character might mess things up for charcoal :p

Mr. Xcoder

What multi-byte?

caird coinheringaahing

> For reference, the characters used are

_-.,/()='`´

The ´ is a multibyte character, hence the scoring

Mr. Xcoder

2:12 PM

@cairdcoinheringaahing I think it's a tiny bit messed up. Can I edit to show you where I think it's messed up and then you rollback if it was correct?

caird coinheringaahing

@Mr.Xcoder Yeah, sure. Are you sure it isn't your browser?

Mr. Xcoder

Yes, sure

Erik the Outgolfer

@HelkaHomba doesn't work for me

Mr. Xcoder

And I am pretty sure I am right, because it is inconsistent

@cairdcoinheringaahing Please take a look (and maybe rollback accordingly if I was wrong)

BTW, look at the tip of the shoes

caird coinheringaahing

@Mr.Xcoder @caird ಠ_ಠ How did I miss that?

Mr. Xcoder

2:14 PM

So I was right?

caird coinheringaahing

@Mr.Xcoder Yes, there was an extra space, right?

Mr. Xcoder

yes

The structure is quite hard to generate

(I don't think Charcoal will win)

@cairdcoinheringaahing Maybe you should post the one with the special types of numbers

The first one

I have solved Germain, Perfect and Mersenne already

caird coinheringaahing

@EriktheOutgolfer you had to ask while I'm removing the sandbox specific parts of the question. And yes.

Mr. Xcoder

Now to solve Vampire

Felix Palmen

finally, "findclique" for the C64 :D (unfortunately quite large....)

Mr. Xcoder

2:24 PM

@cairdcoinheringaahing About the vampire... Split in two numbers (without repetitions, that might not use all of the digits)?

caird coinheringaahing

@Mr.Xcoder all digits used (no leading 0s), split into 2 equal length numbers

Mr. Xcoder

@cairdcoinheringaahing Much easier now

@cairdcoinheringaahing Might want to clarify that bit

caird coinheringaahing

Yay! I haz a question that people like! /s

Mr. Xcoder

@cairdcoinheringaahing Wait... What if the length is odd... What' happens to the vampire?

caird coinheringaahing

@Mr.Xcoder If the length of the original is odd, it isn't a vampire number

Mr. Xcoder

2:28 PM

What a relief

caird coinheringaahing

12 rep to being able to protect questions :P

Mr. Xcoder

You won't use that anyway

caird coinheringaahing

@Mr.Xcoder I'll have to constantly unprotect the OEIS one

New Main Posts

6

Q: Perfect, Germain, Vampire, Mersenne! (Don't forget narcissistic)

Six is a number perfect in itself, and not because God created all things in six days; rather, the converse is true. God created all things in six days because the number six is perfect. I am fascinated by numbers. As were Sophie Germain and Marin Mersenne. To be more specific, these two we...

Mr. Xcoder

I have 8 bytes for each type except vampire, which requires 30 bytes

Now to join the parts...

caird coinheringaahing

2:34 PM

@Mr.Xcoder Lol, Pyth?

Mr. Xcoder

Yes

@cairdcoinheringaahing May we output as [True,, False, False, False, False], [False, False, False, False, True], [True, True, False, False, False] (ouputting which satisfy the conditions)?

caird coinheringaahing

@Mr.Xcoder is there a builtin in Pyth to get the first truth element in an array?

Mr. Xcoder

@cairdcoinheringaahing x<blahblah>1

Two bytes

But it would waste 4 in my case.

caird coinheringaahing

@Mr.Xcoder I'm going to say no, as it isn't 6 distinct values

Mr. Xcoder

ok

@cairdcoinheringaahing How is 28 perfect?

Oh

caird coinheringaahing

2:40 PM

@Mr.Xcoder 28 = 1 + 2 + 4 + 7 + 14

Mr. Xcoder

NVM

Sh** my answer is invalid

Riker

@flawr yes ikr saw that yesterday

have you seen r/emuwarflashbacks?

caird coinheringaahing

@Riker wait seriously? I'm not sure what is weirder, reddit or OEIS

Riker

def reddit

Helka Homba

Mr. Xcoder

2:47 PM

@cairdcoinheringaahing 74 bytes... UGH

Helka Homba

^^ well then Google...

Riker

lol ok then

caird coinheringaahing

@HelkaHomba Clearly, the FBI hacked Google, just to add that Easter Egg.

Erik the Outgolfer

@Mr.Xcoder if pyth shocks you, look at jelly

Mr. Xcoder

@EriktheOutgolfer It's ok, I have 72 bytes

caird coinheringaahing

2:51 PM

@EriktheOutgolfer holy mother of angry birds, that is the longest Jelly program I've seen that wasn't mainly compressed data

Mr. Xcoder

Posted

@EriktheOutgolfer I now feel really good. 18 bytes away from jelly in a classification challenge is really good.

Erik the Outgolfer

@Mr.Xcoder 17

Mr. Xcoder

I thought you had 54

Erik the Outgolfer

@cairdcoinheringaahing can we return a list of classes instead of returning one class?

Mr. Xcoder

@EriktheOutgolfer No.

18 mins ago, by Mr. Xcoder

@cairdcoinheringaahing May we output as [True,, False, False, False, False], [False, False, False, False, True], [True, True, False, False, False] (ouputting which satisfy the conditions)?

Erik the Outgolfer

2:55 PM

oh

my jelly answer is now a one-liner :p

caird coinheringaahing

@EriktheOutgolfer V/v with strings?

Mr. Xcoder

Should I risk adding an explanation when I'm not sure I can golf it further?

Erik the Outgolfer

@cairdcoinheringaahing yep

v also takes an argument

caird coinheringaahing

@Mr.Xcoder Give it 30 mins of golfing, and if you can't save any bytes, add an explanation

Mr. Xcoder

@cairdcoinheringaahing I will add a generic explanation, I think. I really don't see golfing ways rn (of course a master like Erik or Leaky would though)

Erik the Outgolfer

2:59 PM

> master

Mr. Xcoder

In fact, I think my answer is pretty well golfed

Erik the Outgolfer

hehe thanks :)

Mr. Xcoder

@EriktheOutgolfer Yes, you do deserve that denomination

Erik the Outgolfer

well, it's just that I don't want to brag about it much :p

Mr. Xcoder

Oh. come one. you. are. too modest.

Mayube

3:02 PM

speaking of leaky, where's he been lately?

Erik the Outgolfer

or dennis

lately he hasn't posted many answers

Mr. Xcoder

@Mayube In the mathematics chat room.

Erik the Outgolfer

@Mr.Xcoder tell dennis that, who deleted the meta post which actually had a meme honoring him

caird coinheringaahing

@EriktheOutgolfer to quote Dennis, it wasn't a unilateral decision by Dennis. For all we know, the other 3 mods overruled his choice to keep the memes

Erik the Outgolfer

his choice? he was the one to delete them (although it's true they weren't historically significant)

caird coinheringaahing

3:07 PM

@EriktheOutgolfer Yes, but in their discussion on whether to delete them, Dennis could have voted to keep them. Just because he deleted them didn't mean he wanted to. We have a badge for deleting a post when people tell you to.

Mr. Xcoder

Golfed it by 1 byte >_>

... And I think I just shaved off 3

O no, it's longer :(

Erik the Outgolfer

1 hour ago, by Mr. Xcoder

Thinks they golfed their answer... Adds 5 bytes

Mr. Xcoder

yes, it's exactly that case

caird coinheringaahing

Q: Do ‚ and , look different?

Mr. Xcoder

No, not at all.

Uhm, you don't like upvoting answers on your questions?

Just asking

Erik the Outgolfer

3:17 PM

@cairdcoinheringaahing knowing 05ab1e, only in some fonts

caird coinheringaahing

@Mr.Xcoder asking for a friend? I'm a little distracted at the moment, working on 2Deorstv. I tend to upvote after checking they work, but didn't get round to it this time.

Lol, check the next sequence for the OEIS question.

Mr. Xcoder

@cairdcoinheringaahing Ok, just asking. I am writing a very solid explanation rn

caird coinheringaahing

oeis.org/A000796

@Mr.Xcoder Plus, its not like you need the rep :P

AdmBorkBork

@EriktheOutgolfer Yeah, quite different. The other challenge didn't mention Unicode at all, called it a Boolean array instead of a Boolean matrix, etc. Everything that I searched on came back empty. :-/

Mr. Xcoder

Yes, it's just a number

Erik the Outgolfer

3:20 PM

@AdmBorkBork and the sandbox is kinda failing a bit

(if you used it, that is :p)

AdmBorkBork

48+ hours in the Sandbox

Erik the Outgolfer

not enough

it should be 72+ hours (new advice, 48+ hours is old from the time sandbox wasn't failing so muck)

Poke

I imagine OCR is difficult even with the use of external libraries. Thoughts?

caird coinheringaahing

@EriktheOutgolfer I have questions in the sandbox from the start of april

Poke

I have a challenge idea that involves parsing text from a picture but that might be too much

caird coinheringaahing

3:23 PM

@Mr.Xcoder Try it online!

Poke

It would be in a font and not handwriting so that would make it a little easier i guess

Mr. Xcoder

Finally Added an explanation!

Mr. Xcoder

3:36 PM

ugh, finally fixed it

@EriktheOutgolfer I think Okx beat you in 05AB1E

Erik the Outgolfer

@Mr.Xcoder let's say my algo wasn't the best :p

Mr. Xcoder

Now I feel I'll get outgolfed in Pyth too

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

Add n to your source code This is a second iteration of a much harder question (now deleted) Your task is to create a program which outputs all printable ASCII characters it doesn't have. You are to also choose an integer n to go along with this. Don't just choose randomly, as n is very importa...

caird coinheringaahing

CMC: Given n, output the first n odd numbers.

I have 4 bytes for Jelly

Erik the Outgolfer

@cairdcoinheringaahing jelly, 3 bytes: ḶḤ‘

H.PWiz

3:49 PM

@cairdcoinheringaahing Husk 3 bytes ↑İ1

Leaky Nun

@EriktheOutgolfer REKT4LIFE

caird coinheringaahing

@EriktheOutgolfer I used # ಠ_ಠ

Erik the Outgolfer

Ḃ#

that may actually be shorter...nah 1Ḃ# still 3 bytes and 1Ḃ⁸# (working version) 4 bytes

Mayube

Braingolf, 7 bytes 1[!_2+]

caird coinheringaahing

@EriktheOutgolfer Try it online! is 3 bytes

Okx

3:52 PM

@cairdcoinheringaahing Neim, 2 bytes: Δᚫ

caird coinheringaahing

@Okx Another infinte list?

Okx

nop

Erik the Outgolfer

@Okx invalid

Okx

Δ creates an implicit inclusive range because the input isn't a list

oh wait

invalid

Erik the Outgolfer

should be Δᚫ<

Okx

3:53 PM

yeah did it the wrong way

caird coinheringaahing

@LeakyNun ಠ_ಠ What? Why?

hahahahahahaha

> 3298 messages found

Leaky Nun

CMC: odd numbers smaller than input

(inclusive or exclusive)

Okx

@LeakyNun 05AB1E, 2 bytes: ÅÉ

Leaky Nun

oooh my message has been deflagged :D

Erik the Outgolfer

@LeakyNun "REKT4LIFE" means "**** you forever"

Okx

3:58 PM

@LeakyNun Neim, 2 bytes: Λᛄ (exclusive)

Leaky Nun

@EriktheOutgolfer how

Erik the Outgolfer

@LeakyNun "REKT" = "**** (you)", "4LIFE" = "as long as you live (i.e. forever)"

of course it might have meant something else too, but this is what I perceived

"REKT" actually means "wrecked", but it's generally a synonym as both words wish you get destroyed

Leaky Nun

y so serious ;_;

Erik the Outgolfer

it can be taken that you were insulting me because of solving a cmc in jelly

caird coinheringaahing

@EriktheOutgolfer How dare you use Jelly! 'Tis a great crime.

Erik the Outgolfer

4:05 PM

@cairdcoinheringaahing it depends on what I put into the jelly

Leaky Nun

@EriktheOutgolfer ;_; you don't need to interpret everything in the worst possible way

Helka Homba

I don't think Leaky meant anything. Just used an internet phrase.

Erik the Outgolfer

@HelkaHomba well you don't normally get a reply with text "REKT4LIFE" out of nowhere

and I didn't interpret it specially, it just came to me as such

Helka Homba

While we're talking internet stuff, does the smiley guy here have an official name/meme status?

Okx

is there some sort of PPCG discord server?

TuxCopter

4:11 PM

yes

there's a discord server

Helka Homba

(found it)

Mr. Xcoder

@LeakyNun f%T2U (the language is obvious)

Leaky Nun

@Mr.Xcoder as is the fact that it can be golfed

Mr. Xcoder

@LeakyNun Uh lol

@LeakyNun %2S?

Leaky Nun

@Mr.Xcoder right

TuxCopter

4:17 PM

oops wrong discord

Okx

i found it anyway

Mr. Xcoder

CMC: Even numbers up to the input (exclusive or inclusive). You may include or exclude 0.

Okx

@Mr.Xcoder exclusive, includes 0

Mr. Xcoder

Dang, Pyth is still 3 bytes

dzaima

@Mr.Xcoder SOGL, 4 bytes

H.PWiz

4:20 PM

What do you guys think of this? codegolf.stackexchange.com/a/141302/71256

Leaky Nun

@H.PWiz Sierpinski triangle :P

Mr. Xcoder

CMC: Given a number, determine if it is mersenne.

Helka Homba

@H.PWiz But the goal is 2 inputs and fewest gates..?

muddyfish

I don't think that's a valid NAND gate and at the very least it's not seriously competing

dzaima

@HelkaHomba it does have 2 inputs

Helka Homba

4:26 PM

Ah. Hard to see in the image

Mr. Xcoder

For the Mersenne CMC, 4 bytes in Pyth (with consistent values): !.&h

Erik the Outgolfer

@Mr.Xcoder i.e. it can be represented as 2**n-1?

Mr. Xcoder

4:47 PM

@EriktheOutgolfer Yes, correct

Erik the Outgolfer

pyth, 4 bytes: sIlh

jelly, 3 bytes: BSỊ

DJMcMayhem

5:24 PM

@Mr.Xcoder Brain-flak, 42 bytes: (<>())<>(({}())){{}<>([(({}){})]<>({}))}{}

Outputs N+1 if mersenne (positive number, truthy), and nothing (infinite loop) if it's not

Mr. Xcoder

Nice

DJMcMayhem

Not entirely sure if that's valid

Mr. Xcoder

I'll accept that, given that it's Brain-flak

DJMcMayhem

@Mr.Xcoder Two 6 byte Jelly solutions: ‘l2µ=Ḟ and ‘ÆEL=1

I'm sure there's a 4-5 byte solution though

Oh wait...

Mr. Xcoder

@DJMcMayhem There's a 3 byte one

DJMcMayhem

5:34 PM

Yeah, I just noticed

@Mr.Xcoder @EriktheOutgolfer Jelly, two bytes: BP

H.PWiz

@Mr.Xcoder Husk, 2 bytes Eḋ

Mr. Xcoder

@DJMcMayhem Would also be 2 bytes if inconsistent vals are allowed: &‘

Erik the Outgolfer

5:53 PM

@DJMcMayhem BẠ tbf

DJMcMayhem

@EriktheOutgolfer So we've got 4 1-byte solutions: BE, BẠ, BP, and BȦ

Although it depends on whether 0 is a mersenne or not

Erik the Outgolfer

yeah

DJMcMayhem

Arguably it is because it's 2**0-1

But then BȦ doesn't work

Erik the Outgolfer

I assume BE is the only valid one

DJMcMayhem

Why? BẠ and BP are fine too

Erik the Outgolfer

5:56 PM

no

0B -> [0]

DJMcMayhem

Ooh

Well do we have to handle 0's and return truthy?

@Mr.Xcoder Can we assume the input is positive?

Mr. Xcoder

@DJMcMayhem Yeah

Erik the Outgolfer

well BE assumes the input is non-negative and it still works

DJMcMayhem

True, that's the best solution

Okx

6:38 PM

@DJMcMayhem oeis doesn't think so

DJMcMayhem

6:50 PM

CMC: Remove every odd line from the input

caird coinheringaahing

@DJMcMayhem VTC as "Made for a specific language" /s

totallyhuman

lambda s:'\n'.join(s.split('\n')[1::2])

@cairdcoinheringaahing what?

DJMcMayhem

@cairdcoinheringaahing ... OK?

Which language is that? You are free to participate or not regardless

caird coinheringaahing

@totallyhuman I'm pretty sure that V has a builtin for it. Clearly not fair :D

DJMcMayhem

No

totallyhuman

6:52 PM

:P

caird coinheringaahing

@DJMcMayhem Sorry, forgot the /s

DJMcMayhem

V, 4 bytes: òJDj

totallyhuman

if i/o as list of lines is allowed: lambda s:s[1::2]

DJMcMayhem

It's actually from superuser

caird coinheringaahing

Notepad++:

open replace dialog (CTRL+H)
Select "regular expression"
find what:
.+\r\n(.+(\r\n|$))
replace to:
$1
press "replace all

DLosc

6:56 PM

Pip, 6 bytes: W PqYq

DJMcMayhem

+1 for Lewis Carrol :)

dzaima

@DJMcMayhem SOGL, 6 bytes: ¶Θ2nHJ (could be ▓2nHJ if trailing spaces are allowed)

DLosc

I often use that as example text. :D

Pavel

@DJMcMayhem $><<$<.read.gsub(/(.*)\n.*/,'\1')

DJMcMayhem

o_O Apparently I just posted my 100th answer on SO

caird coinheringaahing

6:59 PM

@dzaima Could you add a link to the SOGL github page from the SOGL interpreter?

Pavel

@cairdcoinheringaahing 0/10 please provide specific keystrokes

caird coinheringaahing

@Pavel does <kbd>kbd</kbd> tags work in chat?

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