The Nineteenth Byte

Leaky Nun

12:01 PM

@Adnan how is it?

@ReleasingHeliumNuclei yes, you really missed that

TùxCräftîñg

>_>

the dictionary i use dont have world

so the hello world only print Hello, W!

Leaky Nun

@Adnan halp inconsistency: no multiple digits at the end but yes in the beginning

Adnan

@LeakyNun yes, that was on purpose

Leaky Nun

@Adnan add stack operators please

Adnan

@LeakyNun Added

Leaky Nun

12:16 PM

@Adnan Also, I had a CMC which is abs(n-1) which I did in 3 bytes

TùxCräftîñg

vim-help how to replace every uppercase letter to lowercase in a file?

DJMcMayhem

@TùxCräftîñg guG

Adnan

@LeakyNun Hmm

TùxCräftîñg

thx

Releasing Helium Nuclei

@TùxCräftîñg :%s/[A-Z]/[a-z]/g lel

TùxCräftîñg

12:19 PM

nvm it doubled it i am stupid

so now the hello world is small yay

Adnan

@LeakyNun I have no idea how

What is the answer?

Leaky Nun

@Adnan you give up so fast

it is your own language

22 hours ago, by Fatalize

pls halp @LeakyNun is better than me at my own language

DJMcMayhem

@ReleasingHeliumNuclei that's very wrong. You mean :%s/\v([A-Z])/\l\1/g

Or maybe \L I'm not sure

Oh it's either

Adnan

@LeakyNun Does it also work for negative numbers?

Leaky Nun

@Adnan no

feersum

12:26 PM

So is the break already over, or it didn't start yet?

Adnan

Hahahaha

@LeakyNun Ahh, it's <01.

Leaky Nun

0

A: Catalan Numbers

Oasis, 9 bytes nxx«*n>÷1 Try it online! Oasis is a language designed by Adnan which is specialized in sequences. Here, we shall use the following relationship kindly provided by Stefano Sanfilippo: Currently, this language can do recursion and closed form. To specify that a(0)=1 is simpl...

Bald Bantha

@MartinEnder my teacher went on a rant yesterday about how some students were calling the pythagorean theorem the "theorem thingy".

Leaky Nun

@Adnan you meant >

Adnan

Yes, sorry

Leaky Nun

12:28 PM

@Adnan now, n%4 without the built-in

TùxCräftîñg

halp

ruby Fixnum#chr dont support unicode chars

Adnan

@LeakyNun Oh, nice

Leaky Nun

@Adnan Feature request: if an A2 operator is at the beginning, let the second argument be a(n-2) instead of a(n-1)

Currently it is useless, since + became equivalent to x, and * to ²

- became N, ÷ became 1

(then Fibonacci would be +T)

Adnan

Oh, that is clever

n%4 is 4e32T.

Leaky Nun

@Adnan nice

so n%2 is only 2 bytes

10 hours ago, by Leaky Nun

@Adnan n%4 is 4e32T

Adnan

12:32 PM

@LeakyNun hahahaha

Leaky Nun

and n%3 is 3 bytes

1

A: 4, 8, 15, 16, 23, 42

The following snippets will print 4, 8, 15, 16, 23, 42 infinitely often: Python OASIS import urllib2 response = urllib2.urlopen('https://oeis.org/search?q=id:A104101&fmt=text') html = response.read().split("\n") while True: print(html[6][-15:]) Char-Codes: four = ord('') eight = ord("\n...

Why is OASIS already a reference to OEIS here? @Adnan

Adnan

Hahahaha, must be a mistake

What a coincidence

Leaky Nun

@Adnan When is W used? (Sorry for many pings)

Adnan

@LeakyNun For big boring sequences

Leaky Nun

@Adnan like?

Adnan

12:35 PM

Let me see if I can find one

TùxCräftîñg

””×÷…‘’αβωτπφ≈←→¿¬əḑç
 !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~⻵⻶⻷⻸⻹⻺⻻⻼⻽⻾⻿⼀⼁⼂⼃⼄⼅⼆⼇⼈⼉⼊⼋⼌⼍⼎⼏⼐⼑⼒⼓⼔⼕⼖⼗⼘⼙⼚⼛⼜⼝⼞⼟⼠⼡⼢⼣⼤⼥⼦⼧⼨⼩⼪⼫⼬⼭⼮⼯⼰⼱⼲⼳⼴⼵⼶⼷⼸⼹⼺⼻⼼⼽⼾⼿⽀⽁⽂⽃⽄⽅⽆⽇⽈⽉⽊⽋⽌⽍⽎⽏⽐⽑⽒⽓⽔⽕⽖⽗⽘⽙⽚⽛⽜⽝⽞⽟⽠⽡⽢⽣⽤⽥⽦⽧⽨⽩⽪⽫⽬⽭⽮⽯⽰⽱⽲⽳⽴⽵⽶⽷⽸⽹⽺⽻⽼⽽⽾⽿

(temporary) codepage of Ru

Adnan

Damn, is it just me or is OEIS very slow

TùxCräftîñg

OEIS is very slow

Adnan

@LeakyNun Hmm, I can't find it anymore

Leaky Nun

@Adnan Will you do this?

25

Q: Hofstadter Q-sequence

Definition a(1) = 1 a(2) = 1 a(n) = a(n-a(n-1)) + a(n-a(n-2)) for n > 2 where n is an integer Task Given positive integer n, generate a(n). Testcases n a(n) 1 1 2 1 3 2 4 3 5 3 6 4 7 5 8 5 9 6 10 6 11 6 12 8 13 8 14 8 15 10 16 9 17 10 18 11 19 11 20 12 Reference Obligatory OE...

Adnan

12:41 PM

Okay

Leaky Nun

@Adnan OEIS is going to be very slow if you input 0,0,0 as search query

OEIS search likes big numbers

Adnan

I just searched with google using "a(0)=0" "a(1)=0" "a(2)=0" oeis.

Leaky Nun

so is google slow or oeis slow?

Business Cat

OEIS is slow

Leaky Nun

oeis.org/A000332

Adnan

12:42 PM

When I tried to click an OEIS link, it was slow

Leaky Nun

google works fine for me

Adnan

But the problem seems to be solved now

Business Cat

@TùxCräftîñg Golfing language?

TùxCräftîñg

yes

the codepage is padded with CJK but now i am filling it with meaningful[citation-needed] characters

Business Cat

Cool I'm doing one too >_>

Codepage is too much work though, I just picked some random encoding

TùxCräftîñg

12:44 PM

cool thing: Ru is infix \o/

Business Cat

Infix is best fix

TùxCräftîñg

and the shitty parser allow a lot of wtf constructs

like ++ == α+:α+β;

Leaky Nun

@Adnan Feature request: if a recursion does not specify a(0), default it to either 0 or 1

I'm still struggling which is more appropriate

Adnan

I think a(0) = 0 is a lot more used

Leaky Nun

@Adnan Submitted two feature requests

Adnan

12:49 PM

0

A: Hofstadter Q-sequence

Oasis, 9 bytes (non-competing) Non-competing, since the language postdates the challenge. Code: n-anc-a+V Expanded form (V is short for 11): a(n) = n-anc-a+ a(0) = 1 a(1) = 1 Code: n # Push n - # Subtract a(n - 1) from n a # Calculate a(n - a(n - 1)) n ...

Leaky Nun

@Adnan e = Pops x, pushes a(n - x) (A 1)

22 hours ago, by Fatalize

pls halp @LeakyNun is better than me at my own language

Adnan

@LeakyNun holy shit, I didn't even know that was possible

Leaky Nun

@Adnan you don't know your language...

Adnan

@LeakyNun Get that nasty transcript out of my face!

Leaky Nun

22 hours ago, by Fatalize

pls halp @LeakyNun is better than me at my own language

Adnan

12:52 PM

how do I do the owl face thingy

Leaky Nun

You can't now, for whatever reason

We used to type @ and then that username would appear

TùxCräftîñg

@Adnan ಠ_ಠ

@ಠ_ಠ plz

come back

Rohan Jhunjhunwala

It's a great geeling when someone is better than you at your own language

Adnan

@RohanJhunjhunwala ಠ_ಠ

@LeakyNun ಠ_ಠ

Rohan Jhunjhunwala

I'm not being sarcastic. I think its good> Its a poweful part of this community

Leaky Nun

12:57 PM

@Adnan How do you know my real name :o

Adnan

@LeakyNun You used it as your first username here?

Leaky Nun

@Adnan :o you remember

@Adnan Look at my sample program here

TùxCräftîñg

good symbol for power except ^?

Leaky Nun

@TùxCräftîñg ? and * are used by some languages

Business Cat

feature-request: Add ಠ_ಠ in the room description so we can copy-paste

TùxCräftîñg

1:02 PM

good idea for *

Business Cat

Typically it's **

Rohan Jhunjhunwala

You can copy paste from the chatiguette ironically where it says not to use it

6

Business Cat

But if your language uses the multiplication sign for multiply you can probably use * for power

TùxCräftîñg

Ru use × to multiply

so go for *

yay

Business Cat

I think ^ is more readable

TùxCräftîñg

1:04 PM

ruby have **

@BusinessCat it's already used for XOR

Business Cat

I use ¦ for XOR because I want to watch the world burn

5

TùxCräftîñg

wat

:/

i have no idea how to type the borked bar with my compose key

Rohan Jhunjhunwala

@BusinessCat you monster

Leaky Nun

@Adnan Feature request: recursion check

TùxCräftîñg

because its not in my settings LOL ROFL XD

Adnan

1:10 PM

@LeakyNun I think you are missing an initial starting point?

Or is that what you meant

Leaky Nun

@Adnan yes, but recursion check?

like, stop before it exceeds the limit

then you won't need the limit at all

you can check if it is referencing itself

Adnan

Oh, you mean that

Business Cat

Can anyone help me combine the first two replace stage into one in this Retina program? I really feel like they could be 1 stage =/

zyabin101

I'm finally on my new Windows XP computer! Hello! :D

TùxCräftîñg

»  echo '“H i”¦… „…a' | ./ru c
Hai

Business Cat

1:12 PM

WTF

Rohan Jhunjhunwala

seems like the only reasonalbe way to print Hai in any language

^

@BusinessCat ftfy

Oh nice, thanks!

it split (¦) H i (“H i”) with a space (… ) and join it („) with a (…a)

Leaky Nun

1:15 PM

@BusinessCat ftfy again

Business Cat

Wat

you're too good at this >_<

Leaky Nun

0

A: Swap bits with their neighbours

Oasis, 17 bytes n4÷axxn4÷xxe+3120 Try it online! Oasis is a language designed by Adnan which is specialized in sequences. Currently, this language can do recursion and closed form. We use this formula: a(4n+k) = 4a(n) + a(k), 0 <= k <= 3 To specify the base case is simple: the 3120 at the ...

@Adnan ^

Business Cat

Got it down to 38

Adnan

@LeakyNun Nice one

Leaky Nun

@BusinessCat you're a genius

Adnan

1:21 PM

@LeakyNun I already fixed the issue: github.com/Adriandmen/Oasis/issues/2

Leaky Nun

@Adnan I saw it, thanks

DJMcMayhem

CMC: Print a pyramid of height N. 1 is `/\`

Leaky Nun

@Adnan Now what should a(1) default to?

@DJMcMayhem very clear thanks

Business Cat

VTC as unclear

DJMcMayhem

I can't draw 2 on my phone. :(

Leaky Nun

1:21 PM

if you just want to give one testcase, at least give n=3

TùxCräftîñg

^^^

Adnan

@DJMcMayhem You mean something like this

  /\
 /  \

crap

DJMcMayhem

Here's two: v.tryitonline.net/#code=&input=IC9cCi8gIFw

Geobits

7

DJMcMayhem

v.tryitonline.net/#code=&input=ICAvXAogLyAgXAovICAgIFw

3 etc.

Is that clear enough?

Leaky Nun

1:23 PM

Yes

Business Cat

Trailing spaces allowed?

Adnan

@LeakyNun I don't think it should default to anything

DJMcMayhem

@BusinessCat sure

Leaky Nun

@Adnan uh, I mean, if it is accessed without being defined

just like a(0)=0

Adnan

How about 1

Leaky Nun

1:24 PM

@Adnan that's the question i'm asking you....

zyabin101

@ΛεγίωνΜάμμαλϠΨΠʹ Return to the Game of Life room, we're missing you.

exempt

installing programs on his new machine

Leaky Nun

@DJMcMayhem Pyth, 18 bytes: VQ+X_JX*QdN\\\\\/J

DJMcMayhem

V, 16 bytes: v.tryitonline.net/…

quartata

@Geobits this lets me draw two cards from my deck

Leaky Nun

@DJMcMayhem how does it work?

Fatalize

1:28 PM

Just got an idea on how to rename PPCG from my last challenge

“pregromming pezzlos & coda gulf”

quartata

@LeakyNun Are there any docs for Oasis yet?

Leaky Nun

@quartata ask me or @Adnan if you have any question

Command list: github.com/Adriandmen/Oasis/blob/master/info.txt

DJMcMayhem

@LeakyNun I don't feel like explaining it from my phone, but basically it enters n-1 spaces + `/\`, then recursively extends it down until the left side hits the first column

Leaky Nun

@DJMcMayhem alright

quartata

I was in fact working on something similar but I've been squarely beaten to the punch >_>

Leaky Nun

1:30 PM

@quartata on which question?

Geobits

@quartata Most people would say it forces you to draw two cards from the deck, but your phrasing is fine, too :P

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@quartata what do cursed wands do?

Leaky Nun

@Adnan pull request

quartata

No I mean a language like this

Fatalize

So Oasis is basically 05AB1E v3?

Geobits

1:31 PM

0A515

7

quartata

No. It's for sequences

DJMcMayhem

I usually write CMC's I know V can compete at.

quartata

@Geobits pot of greed allows me to take two cards from my deck and add them to my hand

Ugh weak joke shouldn't have required followup joke

Adnan

@Fatalize No, apart from having a stack, it's nothing like it

@Geobits Hahahaha

Leaky Nun

@Adnan So have you decided on a(1)?

Fatalize

1:33 PM

What's the difference?

(besides the built-ins)

Business Cat

@DJMcMayhem CJam, how the hell did I make this work: q~,_,f{\_@(@-S*'/+\2*S*+'\+N+}

Geobits

@quartata I prefer Divination for that.

Leaky Nun

@Fatalize Let's use Fibonacci as an example

The program for it is +T, or +10 (since T is shorthand for 10)

The 10 means that a(0)=0 and a(1)=1

to add more basecases just append directly

Adnan

@LeakyNun I'm still struggling on how to implement that

Leaky Nun

@Adnan I wrote a sample program

@Fatalize The + is a stack operator, and since stack is empty, it takes a(n-1) and a(n-2) as argument

Adnan

1:35 PM

@LeakyNun I meant in the source code of oasis.py

Leaky Nun

this language is highly specialized for sequences

@Adnan I wrote a program to detect. You just need to find the arities

@Fatalize In fact there are one-byte built-ins for a(n-1), a(n-2), and a(n-3).

Fatalize

@LeakyNun If T pushes 1 and 0, how the hell do you push 10?

Leaky Nun

@Fatalize The basecases can only be single-digit

But the program can have multi-digit numeral literals

Fatalize

@LeakyNun That's… way too restrictive?

Leaky Nun

so T+0 would mean a(0)=0 and a(n)=10+a(n-1)

@Fatalize his rationale is that you won't have a sequence with a base case more than 9

Fatalize

1:36 PM

what if I want a sequence where a(0) is 42

DJMcMayhem

@LeakyNun Do the pyramid challenge in brain-flak? :P

Leaky Nun

@Fatalize rip

Fatalize

That's… dumb, sorry

Leaky Nun

@DJMcMayhem SyntaxError: not a chance

@Fatalize cc @Adnan

Adnan

@Fatalize How is that dumb

DJMcMayhem

1:37 PM

Hahaha

Adnan

It's better than wasting 100 bytes for multidigit numbers

Fatalize

@Adnan You make a language for sequences where almost all sequences are not inputable

zyabin101

I can now ably post answers :)

Leaky Nun

@Adnan that said, you can use an extra byte for multi-digit

TùxCräftîñg

idk how to implement 2d indexing operator for Ru

Fatalize

1:38 PM

now sure in most PPCG challenges the base cases are single digits

TùxCräftîñg

array₂xy or array₂[x;y]

Leaky Nun

@Fatalize almost all sequences have a basecase larger than 9?

TùxCräftîñg

or any other syntax

Fatalize

@LeakyNun Theoretically yes, there are only 10 digits

Leaky Nun

@Fatalize demonstrate it

Adnan

1:39 PM

So, first you say that almost all sequences are not inputable, and a minute after that you say that most PPCG challenges only use 1-digit basecases

Leaky Nun

@Adnan Maybe you could have ß42ß for a basecase of 42

Adnan

I feel like there's something wrong here

Fatalize

I just don't like the idea of building a language which is solely fitting to PPCG challenges

Leaky Nun

@Fatalize jelly?

isn't brachylog for golfing?

Fatalize

if you make a language for sequences it should be good for sequences

Adnan

1:39 PM

@LeakyNun I was thinking of something like ßz, which converts z from base 214

TùxCräftîñg

^^

Fatalize

not a subset of sequences

Leaky Nun

@Adnan nice

@Fatalize calm down, this issue is being addressed atm

@Adnan In other news, RIP your own challenge

15

Q: Alternating Sign Sequence

Introduction The sign of a number is either a +, or a - for every non-zero integer. Zero itself is signless (+0 is the same as -0). In the following sequence, we are going to alternate between the positive sign, the zero and the negative sign. The sequence starts with 1, so we write 1 with a pos...

code-golf math number sequence

TùxCräftîñg

@Adnan why 214? if you want a big base a good ol b256 is better

Adnan

@TùxCräftîñg CP1252 encoding has only 215 printable characters iirc

TùxCräftîñg

1:41 PM

:O

zyabin101

4

A: Sandbox for Proposed Challenges

Peter Piper and the Peck of Pickled Peppers tags: code-golf kolmogorov-complexity Without an introduction, output the following tongue twister: Peter Piper picked a peck of pickled peppers. A peck of pickled peppers Peter Piper picked. If Peter Piper picked a peck of pickled peppers, Where's...

TùxCräftîñg

it have 215 chars

it's enormous

Adnan

@LeakyNun rip oasis for the 100th time haha

zyabin101

Gotta post ^^^^ someday ;(

Adnan

@TùxCräftîñg It's 41 less than the Jelly encoding

Fatalize

1:42 PM

@LeakyNun I'm just pointing out that it's pretty arbitrary to have that limitation just because it's true in most PPCG challenges. Sure Jelly is short and good at PPCG challenges but I don't think it has such specific limitations to save 1 byte

βετѧ Λєҫαγ

Hey @Dennis how does TIO supply the interpreter with the code? I'm trying to work out how, in Python, to take multi-line code as input.

Leaky Nun

@Fatalize I see, thanks

DJMcMayhem

@βετѧΛєҫαγ python isn't on TIO though

TùxCräftîñg

._.

i am stupid

Rainbolt

Hi stupid. I'm Rainbolt.

7

TùxCräftîñg

1:45 PM

¿ used @last for :func but it need to use self.terminal

Rainbolt

I missed the MTG chatter :(

Geobits

There wasn't much really.

Leaky Nun

0

A: Alternating Sign Sequence

Oasis, 12 bytes (non-competing) n3÷>n3÷y>n-* Try it online! Oasis is a language designed by Adnan which is specialized in sequences. Currently, this language can do recursion and closed form. This answer can only demonstrate closed form. For recursion, see for example this answer. We use t...

@Adnan

Rainbolt

There's a Grand Prix in November in Dallas, TX. Format is Modern. I'll be there for sure, along with half of my store (like 30 regulars).

zyabin101

brb restarting computer

Geobits

1:48 PM

Nice. Good luck with it :)

Leaky Nun

@Adnan Have you implemented it yet?

TùxCräftîñg

2 mins ago, by TùxCräftîñg

i am stupid

Rainbolt

You're not getting any stars. I stole them from you. Give it up.

Adnan

@LeakyNun Which feature?

Leaky Nun

@Adnan The only feature request atm

Oops, you opened another one

TùxCräftîñg

1:48 PM

TIL using features before they are implemented dont work

Geobits

@Rainbolt sigh As much as I want to star it to spite you, I'll restrain myself.

Rainbolt

It was a calculated gamble. I believed in you and you didn't let me down.

3

Geobits

Yay, somebody believes in me :)

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

Before the Auto-Correct prevailed: Deciphering T9 text You are a spy who needs to obtain some crucial information from the security service M1S. The agents of M1S are well aware that their Wi-Fi signals can be intercepted, their Android/iOS security vulnerabilities exploited etc., so all of them...

zyabin101

Hello

Business Cat

1:52 PM

@Rainbolt GL. I won't make it because I live in Canada

TùxCräftîñg

40 mins ago, by TùxCräftîñg

»  echo '“H i”¦… „…a' | ./ru c
Hai

Business Cat

Hard to get good GPs up here >_< mostly standard and sealed

Leaky Nun

5

A: Swap bits with their neighbours

Oasis, 17 bytes (non-competing) n4÷axxn4÷xxe+3120 Try it online! Oasis is a language designed by Adnan which is specialized in sequences. Currently, this language can do recursion and closed form. We use this formula: a(4n+k) = 4a(n) + a(k), 0 <= k <= 3 To specify the base case is simple: ...

Holy cow how is this getting 5 upvotes

Adnan

@LeakyNun I'm stuggling with the implementation

zyabin101

Last time, I installed Windows, Firefox, VLC, IrfanView, SumatraPDF and ClamWin on it, and now the last one runs a hourly scan for viruses of memory and Drive C:.

Leaky Nun

1:54 PM

@Adnan Should I help you?

Adnan

Okay

βετѧ Λєҫαγ

@DJMcMayhem I'm writing a DNA# interpreter in python. Like hoe Fourier's interpreter is written in python

zyabin101

Not as live checking as commercial antiviruses do, but regular enough.

Fatalize

@LeakyNun Will there be a shorter answer after implementing missing features? Because this seems fairly long for a language aimed at sequences

zyabin101

Posting

Leaky Nun

1:54 PM

@Adnan then what is the default of a(1)?

zyabin101

4

A: Sandbox for Proposed Challenges

Peter Piper and the Peck of Pickled Peppers tags: code-golf kolmogorov-complexity Without an introduction, output the following tongue twister: Peter Piper picked a peck of pickled peppers. A peck of pickled peppers Peter Piper picked. If Peter Piper picked a peck of pickled peppers, Where's...

Adnan

@LeakyNun 1

zyabin101

now, any last feedback?

Leaky Nun

@Fatalize yes, after Dennis has pulled, there will be modulo

@Adnan ok a moment

DJMcMayhem

@βετѧΛєҫαγ Ooh, duh that makes more sense. I've got two languages on TIO, and they both take input from a file rather than STDIN, if that helps at all

Although I think STDIN is possible too

βετѧ Λєҫαγ

1:56 PM

@DJMcMayhem That helps a lot, yeah that'll work

Business Cat

So TIO writes to a file and runs it?

zyabin101

Okay, because everyone has no attention on me, I'll post anyway. Thank you.

DJMcMayhem

@BusinessCat yeah, it writes the source and input to two different files

(At least, that's the only way I've done it before)

Leaky Nun

@Adnan What should a(n) default to?

(Such scenario can occur)

Adnan

@LeakyNun For simplicity, n

Leaky Nun

1:58 PM

@Adnan I won't mess with them

I won't check if a(n) is undefined

I'll just check a(0) and a(1) using my algorithm

Geobits

@zyabin101 I'm not sure what feedback you want that isn't already given in the sandbox. It's very similar to other challenges already, and might be improved by finding another tongue twister, but other than that it's straightforward.

Adnan

@LeakyNun Okay

Geobits

Asking for feedback after receiving some and doing nothing about it tends to not work well.

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