The Nineteenth Byte

i think it just rerenders the post md to comment md and any mangling that happens just happens

in BMG Drafts, 2 hours ago, by DLosc

Draft: Given two positive numbers h and w, output the first w numbers in the following pattern: 1, 2, ..., h-1, h, h-1, ..., 2, 1, 2, ..., h-1, h, ...

in BMG Drafts, 2 hours ago, by caird coinheringaahing

Draft: Output all pandigital numbers

oh hey a BMG that i am actually here for

Same

@cairdcoinheringaahing Jelly, 6 bytes: RŒB⁹¡ḣ (Try It Online!)

it is really inefficient tho but idc. also there is probably a better method anyway

12:03 AM

ಠ_ಠ why doesn't ŒB cast to range

Is Vyxal down?

Then ŒB¡ḣ would work

Oh no

Maybe it was lyxal

running something

@emanresuA you're gonna have to be more specific than that

nvm

@hyper-neutrino It's working now, maybe someone was using T or running something else time-intensive

12:05 AM

@emanresuA looks at screen nervously

What did you do...

@cairdcoinheringaahing 13 bytes

@cairdcoinheringaahing Jelly, 9 bytes (warning: will not terminate :P)

@emanresuA Uh… nothing? Definitely not 1234567890Ṗ

@cairdcoinheringaahing Vyxal: kdṖ (Don't run plz)

@AaronMiller smh use kd

@cairdcoinheringaahing I am dumb :/

12:08 AM

lol

@emanresuA All permutations? Got to filter out those that begin with 0

@cairdcoinheringaahing no, you're caird.

Fine, kdṖ'hI

@emanresuA I was testing how the command worked with numbers before actually golfing it. Probably should’ve used 123 or smth instead

@cairdcoinheringaahing Scala, 28 bytes: h=>1.to(h)++h.to(1,-1)take _

12:10 AM

@cairdcoinheringaahing Jelly, 8 bytes

@emanresuA That outputs numbers right, not lists of digits? :P

in BMG Drafts, 2 hours ago, by DLosc

Draft: Given a nonnegative integer h, outputting its "bouncing" sequence: h, h-1, ..., 1, 0, 1, ..., h-2, h-1, h-2, ..., 1, 0, 1, ..., h-3, h-2, h-3, ....., 1, 0, 1, 2, 1, 0, 1, 0

@cairdcoinheringaahing List of strings

Which is perfectly valid

'hI filters numbers by the parseint of their first char

So no 0

@cairdcoinheringaahing python 3.8, 65bytes Try it online!

@emanresuA do you need the I?

Is '0' falsy

@Niko Congrats on 1111 rep :P

12:12 AM

One moment

@cairdcoinheringaahing thx :D

@AaronMiller lyxal.pythonanywhere.com?flags=&code=%5C0%E1%B8%83&inpu… Nope

OIC, I thought kd returned a number, not a string

@Niko Your next goal is 11111

@cairdcoinheringaahing Jelly, 10 bytes: (Try It Online!)

12:14 AM

@emanresuA that's 10k from 1111

hmmmm

62 bytes now Try it online!

in BMG Drafts, 41 mins ago, by user

Draft: Given two vectors in any number of dimensions, find another vector that is orthogonal to both

61 bytes, gonna keep working on it

in BMG Drafts, 41 mins ago, by caird coinheringaahing

Draft: Dot product of two vectors

@cairdcoinheringaahing Vyxal, *∑

@cairdcoinheringaahing APL, 3 bytes: +/× :P

12:19 AM

@Niko 55 bytes

Imagine using list() when you can use [...]

52 bytes :P

@cairdcoinheringaahing Oh wait, i didn't realize this repeated more than twice

Oh right, Python uses *

still don't understand *

but looks useful

@lyxal imagine using ∑ instead of s flag smh

12:22 AM

@user I'm an idiot, that should be h=>w=>1 to w flatMap(_=>1.to(h)++h.to(1,-1))take w instead

@AaronMiller But that would only enrage the flag haters

@cairdcoinheringaahing This one could work on main. If two vectors are parallel then the answer is 90 deg rotation of one of the inputs, otherwise the cross product of first 3 dimensions with zero padding works

@user Good. /s

@cairdcoinheringaahing python 30 bytes Try it online!

@Niko foo(*[bar, baz, xyzzy]) == foo(bar, baz, xyzzy)

@user ooooooh

12:23 AM

@Niko That only works for 2d vectors

That is, assuming zero vectors are not valid answers and the two inputs are also nonzero

@cairdcoinheringaahing oh

@cairdcoinheringaahing What, don't you live in a 2d universe? :P

gonna fix that real quick

I keep mistaking Niko for Bubbler because their pfps look the same

12:24 AM

36 bytes to work for any length :P

<del>I am a 3D being now</del>

Ooh, int.__mul__

---strikethrough--- ~~strikethrough~~

your local del do not work here

markdown failed me again

I was going to go with lambda a,b:sum(a*b for a,b in zip(a,b)), didn't know you could do that

12:25 AM

gtg class is on :P

@Niko HTML doesn't work here, this isn't Markdown

in BMG Drafts, 34 mins ago, by Bubbler

Draft: Given two vectors (not necessarily same length) a, b, and a number c, pad the shorter one with c and compute their dot product

Markdown is only for posts, it doesn't even work in comments

@user How is that possible lol

@cairdcoinheringaahing if only c could always be 0 ;p

12:26 AM

Orange

All orange is the same to me

But I have some pink too

and less orange

My eyes do not discriminate over such small things

Plus, I can barely see the pink, and it looks like orange anyway

Bubler and Niko are both catgirls, so they're essentially the same person :P

5

Okay, time to write every message over three lines /s

how
about
five
its
better

12:28 AM

@cairdcoinheringaahing Wait, if all catgirls are equal, if we convert one into a doggirl, will all be converted?

@emanresuA how / about / four / instead

that
is
one
not
four

Eh

One, four, what's the difference, right? They all pale in comparison to the greatness of 14

The human brain struggles to comprehend a number that large

@cairdcoinheringaahing The fact that either a or b could be the shortest is annoying :/

@cairdcoinheringaahing may we please assume all positive integers?

@Bubbler ^

12:33 AM

I'll allow that

@cairdcoinheringaahing Python 3, 84 bytes

because itertools

in BMG Drafts, 40 mins ago, by caird coinheringaahing

CMC: Given a string as an input, output ┬─┬ ノ( ゜-゜ノ) if the input equals (ノ°Д°）ノ︵ ┻━┻, otherwise output nothing

@lyxal y l no work?

@AaronMiller wdym

@cairdcoinheringaahing Scala: Map("(ノ°Д°）ノ︵ ┻━┻"->"┬─┬ ノ( ゜-゜ノ)"). Not sure if this is valid, since it throws an error on other inputs

@lyxal l should do len(a) == len(b), but it doesn’t work: Try it Online!

12:36 AM

FIRE!!!

APL, 71 bytes unicode:{⍵≡'(ノ°Д°）ノ︵ ┻━┻':'┬─┬ ノ( ゜-゜ノ)'}⍞, TIO

@cairdcoinheringaahing Jelly, 12 bytes LÞẈIẋ@;@"⁸ḋ/

@AaronMiller you can do it without l

@cairdcoinheringaahing Vyxal, 8 bytes: Zƛ⁰v⟇Π;∑

@cairdcoinheringaahing Can we error on non-flip inputs?

Sure

12:38 AM

Yay

@lyxal Yes, but l could be useful in challenges like this, if it worked

@AaronMiller that'll be fixed in 2.6

👍

@cairdcoinheringaahing Jelly, 11 bytes LÞẈI⁹ẋ⁸;"ḋ/

18 mins ago, by Aaron Miller

@lyxal imagine using ∑ instead of s flag smh

12:40 AM

in BMG Drafts, 42 mins ago, by Bubbler

Draft: Given a vector of integers, test if it is all zeros

Scala: _ forall 0.==

@Bubbler Can we output a falsey value if yes, truthy if no?

@cairdcoinheringaahing Vyxal, 3 bytes: 0J≈

@cairdcoinheringaahing Fine

@cairdcoinheringaahing Vyxal, 3 bytes: 0J≈

12:42 AM

@cairdcoinheringaahing Pip -x, 11 bytes: $*_MS@<gZDc

@AaronMiller ninja'd

But then I guess the answer is 1 byte in Jelly

@cairdcoinheringaahing APL: ∨/× (inverted)

Ninja’d

Jelly, 2 bytes ḟS

12:42 AM

crap double ninja’d

@Bubbler 1 byte?

Any

....

:P

@cairdcoinheringaahing a¬ in vyxal with normal output

12:43 AM

2 bytes in Jelly, going by the standard truthy/falsey :P

Jelly, 2 bytes ¬Ạ

@cairdcoinheringaahing Vyxal G, 0 bytes. Returns 0 if all zeros, or a positive int otherwise. :P

@lyxal Does Vyxal have a way to apply a function to the stack without popping anything off of it? (like some kind of smart duplicate that duplicates as many items as needed)

@AaronMiller What does G do?

In fact, why wouldn't s as a flag work?

@user no

@user maybe ~?

@cairdcoinheringaahing maximum

12:45 AM

@AaronMiller that's what I was about to suggest to make work

:P

Ah

@user for dyadic and triadic elements, yes

More interesting:

in BMG Drafts, 47 mins ago, by Bubbler

Draft: Given a vector of integers, test if it is all ones

@cairdcoinheringaahing Scala: _ forall 1.== (sorry, same answer as before)

12:46 AM

@cairdcoinheringaahing 1J≈ in Vyxal

If I can output en empty list for "yes" and a non-empty list for no, I get Jelly, 2 bytes ḟE

@cairdcoinheringaahing ₌∑L= or 1=A

@cairdcoinheringaahing Pip, 6 bytes: $=gPU1

@cairdcoinheringaahing Same here, 'ċ

Append a 1 to the arglist and check for equality

12:47 AM

What about "sum equals length"?

Won't work

Counterexample: [0, 2]

Argh ninja'd

Ah yeah. Damn identity elements ಠ_ಠ

"Product is 1" works if limited to non-negative integers

12:48 AM

Imagine working with a group that includes an identity element :P

@cairdcoinheringaahing ikr, I wish 0 had an identity crisis sometime and just went away

@cairdcoinheringaahing Made by the (ℕ, +) gang :P

@cairdcoinheringaahing Imagine working with structures

@cairdcoinheringaahing Is that natural numbers without 0, then?

Of course :P

I hate the ambiguity of N

Why can't mathematicians just agree on notation like rational people?

12:50 AM

@cairdcoinheringaahing it would work, but I don’t ever get to use G :p

@cairdcoinheringaahing Supporters of Peano arithmetic disagree with you :P

@cairdcoinheringaahing Also 6 bytes: JUQgQ1 (remove duplicates, join as string, assert string-equal to 1)

Math: Making life miserable for everyone since 1000 BCE

N without 0 is nice in number theory, but N with 0 is nice in formal proof theory, that's all

@Bubbler Supporters of Peano arithmetic were probably dropped on their heads as babies :P

12:52 AM

@user There's some rebuttal joke here about Bayesian statistics, but I can't find it

@Bubbler Anyone who supports N with zero is wrong :P

N with zero is literally 𝕎 :P

@Bubbler (This includes me after having studied Coq and Lean)

@DLosc You Peano people are too naive

@cairdcoinheringaahing Reference?

we literally have a different symbol for 𝕎, why would you use ℕ for 𝕎

12:54 AM

Or is it literally a joke?

i say getting ℕ from the brachylog bookmarklet

I've seen 𝕎 be used to represent the "whole numbers" (aka, non-negatives)

Oh right, I do remember whole numbers

@UnrelatedString ikr, it's like mathematicians want to confuse the heck out of innocent civilians

but didn't know there's a notation for that. I think I saw more like N ∪ {0}

12:56 AM

Ah, so you do admit N doesn't contain 0!

~~the best argument for ℕ excluding 0 is doing a search for ℕ₁ in the brachylog corpus~~

@Bubbler There's a joke about that article about image browsers here, but I can't find it

Yeah, I agree N starts with 1. The problem is with the plain English term "natural numbers"

0 is unnatural.

@Bubbler github.com/cairdcoinheringaahing/Whispers/blob/master/…

12:58 AM

2

Whispers says 𝕎 is whole numbers, therefore it is :P

in BMG Drafts, 1 hour ago, by Bubbler

Draft: Given a vector of integers, test if it is a continuous range [a, a+1, a+2, ..., a+b] for some integers a and b

i feel like i was taught the distinction between wholes and naturals in elementary school, so we might hope that it catches on from there, but i also don't recall it being brought up again for years afterwards if ever so most people probably just forget

@cairdcoinheringaahing Hmm, this "caird coinheringaahing" looks totally legit, definitely no relation to the CGCC user by the same name

^^ We had a Venn diagram showing them and everything

@user I've ssen that before

I think I confused natural numbers with the digits for a long time though lol

12:59 AM

That's the last of the BMG drafts that were starred, so we'll say that's the end of the event. Feel free to keep solving the posted challenges, and to solve the ones that weren't starred

@emanresuA Yeah, I copied someone else's image

@user i remember that exactly

@user Like here

OldSandboxPosts

Sandbox posts last active a week ago: Fastest untyped lambda calculus evaluator [fastest-code] [functional-programming] [lambda-calculus] [interpreter]

Someone posted it befor

1:00 AM

That was me IIRC :P

CMC: Given a string as an input, output ┬─┬ ノ( ゜-゜ノ) if the input equals (ノ°Д°）ノ︵ ┻━┻ and vice versa, otherwise output nothing

@OldSandboxPosts Have you revised your opinion of sand?

@OldSandboxPosts I thought you were dead, you hadn't posted anything in 3 days :P

@emanresuA Yes, I searched for christianity and found it :P

Oops, time to unignore Old Sandbox Posts

@UnrelatedString I saw it for the very first time in a uni-level number theory textbook. "Whole numbers" doesn't simply have a translation in my language, we just literally call them "nonnegative integers"

1:01 AM

makes sense

@cairdcoinheringaahing Pip, 7 bytes: g=a+,#g

What language is that?

@user i think it went as far as complex ⊃ reals ⊃ rationals ⊃ integers ⊃ wholes ⊃ naturals

What about primes?

@user Korean, correct?

1:02 AM

@UnrelatedString Oh, we didn't learn about complex and real numbers in elementary school lol

Does Korean have no way of saying whole/full/any other synonyms? @Bubbler

i didn't either

@user @emanresuA Yes

they just mentioned them with no further explanation

lol

OldSandboxPosts

@emanresuA I think caird coinheringaahing is a Sith Lord!

1:03 AM

didn't stop me from feeling smug about looking quaternions up on wikipedia

My school tried to shield us from "advanced math" such as negative numbers and decimals, so 3/4 and 4-10 were considered to just not exist

@OldSandboxPosts I agree.

lmao

i think i remember something to that effect too

@user Lol

Were there conspiracies?

Not sure what you mean

1:04 AM

@user Just "numbers" in informal terms

Huh

The formal terms only include "positive integers" = "natural numbers", "negative integers", "nonnegative integers". No specific word for "whole numbers"

Were there people wondering what those could be? Maybe they were powerful weapons...

OldSandboxPosts

@emanresuA Have you heard the story of Darth Dennis the Jelly? I thought not. It's not a story the Vyxal golfers would tell you. Darth Dennis had the ability to manipulate the bytes themselves to create... golf. The Jelly side of code golf is a pathway to abilities some consider... unnatural.

Until, an apprentice, Darth Bubbler, outgolfed him while he rested. Ironic. He could outgolf others, but couldn't save himself from being outgolfed

@emanresuA Well, a bunch of us had learned about negative numbers already thanks to another teacher, so it was weird when the teacher marked stuff like 3-4=-1 wrong because 3-4=impossible ⍨

@OldSandboxPosts wtf

Is that you, Redwolf?

1:08 AM

Yes. It's Redwolf. Definitely.

@user No, caird has the login details

Ah

Wait, so you admit that Jelly is the Dark Side and that Vyxalers are the good guys/the Jedi?

Thinking about it, I don't think Redwolf does

@user "good guys"

I don't think you were paying attention when you watched Star Wars. It's the story of a teenager becoming radicalised by an ancient religious cult into committing an act of mass terrorism

3

@cairdcoinheringaahing Agreed

@cairdcoinheringaahing sroty

It's like the entire site went into Jelly vs Vyxal competition (faction war?)

1:11 AM

The Jedi aren't the good guys, the Sith are, as they tried to liberate the galaxy from an oppressive religious influence on a democratically elected government :P

@cairdcoinheringaahing Well, yes, I agree. --Wait, you're not talking about the prequels? ;)

@cairdcoinheringaahing Really? I thought it was the story of a wise, powerful old man fighting off puny rebels but finally being betrayed by one of the pupils that was closest to him

@cairdcoinheringaahing Yes, this is the way to interpret it

@user Obi-wan / Kylo?

@Bubbler I am neutral

What drives a man to be neutral? Gold? Power? Or were you just born with a heart of neutrality?

1:14 AM

Desire to refrain from fight, I guess

@DLosc The prequels are about a child, raised as a slave, being freed, only to be indoctrinated by a religious cult. He then begins to notice and understand the problems with that cult and attempts to leave it, only to be viciously attacked and mutilated by high-ranking members of that cult, all while protecting the democratically elected leader of the state he lives in

As for the sequels, I have no idea what's going on there :P

@cairdcoinheringaahing "I am not altogether on anybody’s side, because nobody is altogether on my side, if you understand me."

What makes a man turn neutral?

►

@cairdcoinheringaahing Gold. Definitely gold.

1:46 AM

@cairdcoinheringaahing Well I mean I do have the login details if I care enough to mess with your code and print them before it logs in :p

Which I don't :p

1:58 AM

Related to this meta post, would I be able to use ? in a Vyxal program with no input to be able to push a 0 without it interfering with other numeric literals? For example, doing ?9 to push 0, then 9, instead of 0 9.

@AaronMiller I would think so

it's just the equivalent of a nilad that pushes 0

Noice

Wait, I actually need a 1. :P

Still, good to know for the future

Hey, with the specific circumstances, I can use ! instead, and it’ll push 1 every time! :D

Why doesn't 09 push 0 and 9?

It pushes the number 09, which is 9.

>:|

Why...

2:12 AM

That's bad golfiness :P

@BrowncatPrograms because every other sane language evaluates 09 as 9

Your number regex should be 0|[1-9]\d* :P

@lyxal But...this is a golfing language

Golfiness > doing what other langs do

@lyxal OTOH, 0 9 is wasting a byte

God I hate mobile chat

@BrowncatPrograms with aspects from traditional languages

2:13 AM

Parsing leading 0s as separate numbers isn't even that un-sane

@BrowncatPrograms The way that numbers are parsed, it simply takes all consecutive number chars (0123456789.) and puts them together, then resolves anything where there’re multiple . (it drops everything from the second . on) and pushes that number

~~we just like giving you and Caird things to complain about~~

...

^^

@AaronMiller Ok, normally, I'm fine with Vyxal being weird. This time, I'm going to open a PR to fix that behaviour tomorrow, because that's just wrong

2:15 AM

Ash didn't even combine digits

Because it has a shorter way of representing every number above 9

@cairdcoinheringaahing Hmm… I don’t see any reason that regex shouldn’t work, so I’ll use it in Ｃｕｒｓｅｄ. /s

Use whatever flags you want, have whatever specific builtins you like, fine. Parse numbers like that, in a stack Lang, you're getting corrected :P

@lyxal aspects from traditional languages should mean syntactical structures familiar to people not used to golf lang structures, not that obvious byte save mechanisms should be removed in favor of being how it works in traditional languages

also 09 is a syntax error in python...

just my take

If there is any language construct that works best in stack langs, it's being able to push multiple numbers with no separator

@cairdcoinheringaahing we don't use regex

2:17 AM

...

Do you mind if I just rewrite Vyxal, but as a proper interpreter? :P

One thing that is really nice with the way numbers are parsed is that a lone . pushes 0.5.

@cairdcoinheringaahing We're already doing that

wait we're not transpiling anymore?

@cairdcoinheringaahing Sure, go ahead! It'll be nice having a break

@hyper-neutrino No

Still transpirekl,

ah

2:18 AM

@BrowncatPrograms (Ash has 10-16 as single byte constants, and a two byte representation for every number up to around 400, then three bytes can be used for everything up to around 67000)

I swear, I'll keep all the weird stuff that makes no sense. To me, that's minor compared to having an actual good interpreter :P

@BrowncatPrograms (Which wasted a lot of code page spaces, don't do that :p)

@hyper-neutrino we are

As in, we're rewriting it already

@cairdcoinheringaahing you missed your chance

hm, ok

@cairdcoinheringaahing Should have said something a few months ago

2:23 AM

I'll just write Ayxal, and write it in Add++ :P

Q: When you should NOT use Regular Expressions?

50

Regular expressions are powerful tool in programmer's arsenal, but - there are some cases when they are not a best choice, or even outright harmful. Simple example #1 is parsing HTML with regexp - a known road to numerous bugs. Probably, this also attributes to parsing in general. But, are th...

regular-expressions

CMQ: Use regex for parsing esolangs?

For things like identifying numbers, sure

Probably don't parse your whole golflang with regexps, but using them to parse things which aren't too complicated is fine IMO

Theoretical point: Perl regex can absolutely parse entire grammar for most esolangs, though I'm not an actual Perl user so I'm not sure how you can actually interpret the code using it

My practical point is the same as ^^

Usually I parse a lang with a parser library from start to the end (down to number and string literals etc) so I don't use regex per se

Just use Retina to parse and tokenise your program, then Charcoal to interpreter those tokens. Also known as "the Neil way" :P

Wut :P

2:31 AM

Neil mainly uses Retina and Charcoal on main :P

@cairdcoinheringaahing Make sure to make custom interpreters for Retina and Charcoal that parse the program with regex :P

Parse regex with regex?

And, given some of those answers, I wouldn't be surprised if you could write a half decent interpreter in Charcoal or Retina

2:46 AM

@BrowncatPrograms Charcoal has regex? :P

retina is regex

Razetime

3:08 AM

@cairdcoinheringaahing would be funny if neil actually made an esolang like this

@cairdcoinheringaahing Charcoal is just a general purpose imperative language with some screen drawing built-ins, so I won't be surprised if you could write an actually good interpreter in it

4:02 AM

This is so sad

Alexa play despacito

Mfers really put a copyright claim on amogus trap remix

We really do live in a susiety

5

4:15 AM

@cairdcoinheringaahing oh thx for the summary

never watched star wars

4:38 AM

Literally every single piece of music gets copyright-claimed these days

^ More logic gates

That's just a 3-way and

it has 2 ands inside it

so its a ~~dyad~~ dyand

Challenge idea: Golf all 256 3-input logic gates (extension of this)

...and apparently we don't have a metagolf challenge for logic gates

Two possible flavors: 1) choose your output language and golf the output 2) output actual circuits and minimize NAND gates

4:57 AM

can i share cmcs in a gist?

AviFS

Why not?!

^

CMC

its a long cmc

5:12 AM

Are you taking some kind of digital logic class right now?

no

The CMC is basically DB+CA in binary, outputting exactly three bits

yes

If I'm allowed to take two arrays [D,B] and [C,A], Extended APL: (3⍴2)⊤+⍥⊥

Vanilla APL: (3⍴2)⊤2⊥+

Try it online!

5:19 AM

@PyGamer0 Doesn't work for small values

You need .zfill(3) or something

@Bubbler it works

its 10 + 01

so 11

But the output should be three bits

so 011

oohhhhhh

> you program should output an array of 3 booleans

@PyGamer0 a probably very cursed 10 byte vyxal answer: +BbṅS3↳ð0V

Try it Online!

5:22 AM

Btw int(x,2) is shorter

New Posts

0

Q: Greedy queens sequence

Challenge Implement the "greedy queens" sequence (OEIS: A065188). Details Taken from the OEIS page. This permutation [of natural numbers] is produced by a simple greedy algorithm: starting from the top left corner, walk along each successive antidiagonal of an infinite chessboard and place a quee...

code-golf sequence chess