The Nineteenth Byte

New Posts

00:59

0

Inspired by this Mathematica.SE post Given two positive integers \$n, k\$ with \$n > k \ge 1\$, output a binary \$n\times n\$ matrix such that every row and column contains exactly \$k\$ 1s, and the leading diagonal is all zero. This is the adjacency matrix of a regular graph. You may output any ...

caird coinheringaahing

@NewPosts I may be very sleep deprived, but I genuinely couldn't get a Jelly answer to this, so no target to aim for to get brownie points

lyxal

Yowch

caird coinheringaahing

01:14

Guess I'm very sleep deprived :P

hyper-neutrino

i don't like my solution

Unrelated String

understandable

lyxal

@hyper-neutrino yeah okay I think I see what you mean

caird coinheringaahing

Any solution with ¤ and superscripts feels bleh

Unrelated String

yeah

hyper-neutrino

01:16

yeah

tbh idk why my solution works

oh wait it's cuz of the special-case 220

Unrelated String

wait that's a special case

are you sure it's not just a 2,20

hyper-neutrino

yeah 2,2,[LCC] is a special case

well like

it's a standard 2,2,0 but 2,2,0 itself is a bit of a minor exception

caird coinheringaahing

I kept trying to construct an nxn matrix then work from there

Had some horribly cursed half-solutions

Unrelated String

is Ḷ<UṙⱮ⁸ valid

not going to actually think about that because the chaining still feels bad

wait of course it's not valid

caird coinheringaahing

Looks like it might be valid

Unrelated String

01:20

well uh

caird coinheringaahing

I only tested it on 5,3 but idk

Unrelated String

@cairdcoinheringaahing diagonal

second element of the diagonal is 1 for 5,3

caird coinheringaahing

Right yes

That is also a requirement

Unrelated String

Ḷ<UṙⱮ⁸U ties hyper's with the same output ofc

caird coinheringaahing

Slightly less cursed than HN's

Unrelated String

01:22

only slightly

hyper-neutrino

i really wish we had a rotate right

caird coinheringaahing

How is it that all Jelly falls under either "elegant" or "cursed"?

Limiting to non-trivial programs, basically all Jelly code is either super elegant and clever, or very cursed and hacked together

Unrelated String

Ḷ<¥ṙN€{ is another dubious 7-byter with the same output

hyper-neutrino

anyway i'm just waiting for lynn to beat us all with a 4-byte pure linalg or base conversion solution

or bubbler

Unrelated String

this really does feel like it should have a 4 byte solution

caird coinheringaahing

01:27

Turns out there's a super obscure Jelly builtin that does this as Œ<something> :P

hyper-neutrino

o_O

caird coinheringaahing

(There isn't, btw)

hyper-neutrino

ಠ_ಠ

Unrelated String

reversed arguments, <Ɱ¬UṙⱮU

still 7

hyper-neutrino

unfortunately i don't think ŒṬ quite helps here

Sandbox Posts

01:39

0

A: Sandbox for Proposed Challenges

Mirror an integer... in NDos' way NDos' Numeral System NDos' numeral system is a numeral system invented by me. It represents every nonnegative integer by a binary tree. Given a nonnegative integer \$n\$: If \$n=0\$, it is represented as the empty tree. Otherwise, the tree has a root. With the ...

Unrelated String

01:55

i... really could not have thought of using ` the way jonathan allan just suggested for you

wow

hyper-neutrino

wow that is very clever

-1 as well cuz the Mhook is redundant

Redwolf Programs

04:43

tfw you're bored of spanish and try russian

Unrelated String

ayy

lyxal

Too many ants.

I do not like that many ants

I do not like that there are too many ants on the wall

Redwolf Programs

Indeed. You should be in seek of a more positive number of ants.

lyxal

Less ants are desirable

Less ants are obtained with water

Apparently ants can't swim on vertical water

And that deters other ants

Redwolf Programs

You should crush the ants in a lip sync battle

lyxal

04:57

It's Tuesday

Can't be funking until Friday night

Redwolf Programs

Ah frick, you are correct.

I suppose you should collect the ants and deposit them in a freezer.

lyxal

But then they might eat the bread in the freezer

I don't want ants in the bread

It's bad enough that they're already existing

Redwolf Programs

Then replace the bread with cabbage

lyxal

Don't got cabbage

Cabbagen't

Redwolf Programs

Of course, because of the ants

lyxal

04:59

No because I just don't have cabbage

Never did have

Redwolf Programs

No, it is the ants. Everyone has cabbage until something causes them not to.

lyxal

Not everyone

I'm that one exception

Redwolf Programs

I find that surprising, but I am willing to accept it

lyxal

Cabbage is on the short list of vegetals I don't like

Or at least I think it is

It's too hard to tell

Redwolf Programs

Ants are very similar to tanks

lyxal

05:01

So I should get some anti-ant landmines?

hyper-neutrino

That leaves only one explanation.

Lyxal is an ant and so he has never had cabbage.

Redwolf Programs

Lyxal, how could you have lied to us for all of this time

lyxal

I swear I didn't mean to

hyper-neutrino

I've seen right through your ant-ics.

lyxal

I'm only learning this now

Redwolf Programs

05:02

Hyper, get the water. Ants cannot swim vertically.

hyper-neutrino

I never would've ant-icipated this outcome.

Redwolf Programs

Wait, we've done a pun-chain with ant before :p

hyper-neutrino

💧

lyxal

@RedwolfPrograms I can barely swim horizontally on a good day

Redwolf Programs

Same, I just dog-paddle lol

lyxal

05:03

I just walk

For backyard pools, I'm tall enough that it doesn't matter about swimming

Redwolf Programs

Well the last time I was in a pool was when I was young enough I couldn't touch the bottom of most of a pool

Unrelated String

i haven't swum in like three years but... how incapable of swimming horizontally are we talking

Redwolf Programs

I just don't see what people like about being half submerged in other people's diluted sweat for an hour or two

lyxal

@UnrelatedString kind of

Like don't expect me to be able to do the whole 50m lol

Unrelated String

oh like by that standard

lyxal

05:05

@RedwolfPrograms haha you're short.

Unrelated String

i always forget swimming as a sport even exists

Redwolf Programs

No, I just haven't been in a pool like like 7 years lol

@UnrelatedString I could probably make it from one end of a large pool to the other once or twice, that's it

lyxal

@RedwolfPrograms would you like to?

Redwolf Programs

No

lyxal

Oh

Okay then

Glad you told me before I committed to bringing a swimming pool to you

Redwolf Programs

05:06

Brining?

Oh that makes more sense

lyxal

Yeah

Brining

Redwolf Programs

I was going to comment on how ingenious it is to replace the water with brine so swimming is easier

lyxal

Just add salt to the pool and make a sweat-urine soup

Unrelated String

i think those do exist

lyxal

@UnrelatedString it's called the ocean I think

Redwolf Programs

05:08

We should make a pool of maple syrup so you feel all sticky and gross for months after

lyxal

That's just what pools in Canada are filled with

@hyper-neutrino how accurate is ^

Redwolf Programs

Let's make a clock whose hands only move when you look at them

lyxal

It'd always be midnight

Redwolf Programs

And a fridge that keeps things consistently lukewarm

lyxal

Then it's not a fridge

It's a blidge

Redwolf Programs

05:11

A fridge is simply a social construct

Unrelated String

it is in texas

consider who you're talking to

lyxal

Because the fr in fridge stands for "Frick it's cold in here"

The bl in blidge stands for "bleh it's lukewarm"

@RedwolfPrograms you're a social construct.

Redwolf Programs

I am also a clock and a fridge

lyxal

So you're a Samsung fridge?

If so can I tweet from you?

Redwolf Programs

I feel like I'm asleep in a dream but I'm awake and not in a dream

I should probably sleep and be in a real dream

So I will goodbye

Unrelated String

05:14

same

Redwolf Programs

Goodbye o/

lyxal

@RedwolfPrograms Ooh I've always wanted to be the construct of someone's subconscious

Y'all sleep and rest well

Redwolf Programs

You to

lyxal

Dumbass it's 4pm here

Not sleep time yet

Unrelated String

i am kept up by repeatedly looking at the second image from my new steganography cop zoomed in at like 500%

it's beautiful

Redwolf Programs

05:15

i am sleep /o/

Unrelated String

/o/

[ɔ]

lyxal

@UnrelatedString Get it out of my head Get it out of my head Get it out of my head Get it out of my head Get it out of my head Get it out of my head Get it out of my head Get it out of my head Get it out of my head

It's too sus

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣀⣤⣤⣤⣀⣀⣀⣀⡀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣼⠟⠉⠉⠉⠉⠉⠉⠉⠙⠻⢶⣄⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣾⡏⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠙⣷⡀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣸⡟⠀⣠⣶⠛⠛⠛⠛⠛⠛⠳⣦⡀⠀⠘⣿⡄⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⢠⣿⠁⠀⢹⣿⣦⣀⣀⣀⣀⣀⣠⣼⡇⠀⠀⠸⣷⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⣼⡏⠀⠀⠀⠉⠛⠿⠿⠿⠿⠛⠋⠁⠀⠀⠀⠀⣿⡄⣠
⠀⠀⢀⣀⣀⣀⠀⠀⢠⣿⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢻⡇⠀
⠿⠿⠟⠛⠛⠉⠀⠀⣸⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢸⡇⠀
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⠀⠀⠀⠀⠀⠀⠀⢸⡿⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⣿⠀
⠀⠀⠀⠀⠀⠀⠀⣾⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣿⠀
⠀⠀⠀⠀⠀⠀⠀⣿⠃⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣿⠀
⠀⠀⠀⠀⠀⠀⢰⣿⠀⠀⠀⠀⣠⡶⠶⠿⠿⠿⠿⢷⣦⠀⠀⠀⠀⠀⠀⠀⣿⠀
⠀⠀⣀⣀⣀⠀⣸⡇⠀⠀⠀⠀⣿⡀⠀⠀⠀⠀⠀⠀⣿⡇⠀⠀⠀⠀⠀⠀⣿⠀
⣠⡿⠛⠛⠛⠛⠻⠀⠀⠀⠀⠀⢸⣇⠀⠀⠀⠀⠀⠀⣿⠇⠀⠀⠀⠀⠀⠀⣿⠀
⢻⣇⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣼⡟⠀⠀⢀⣤⣤⣴⣿⠀⠀⠀⠀⠀⠀⠀⣿⠀
⠈⠙⢷⣶⣦⣤⣤⣤⣴⣶⣾⠿⠛⠁⢀⣶⡟⠉⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⡟⠀

Unrelated String

that's the third one

lyxal

I can count.

Why would you even question my counting ability

See I'll prove I can count

1 3 2 5 5 3 8 6 4 9 6

That is how you count right?

Right?

Unrelated String

yep

lyxal

05:18

Phew

emanresu A

06:08

Good job

lyxal

Thank you

emanresu A

07:22

@GingerIndustries z with 2-indexing

Newly Featured Posts

07:39

19

Q: Play the Fruit Box Game

Play the Fruit Box Game Intro Fruit Box is a game consisting of a 10x17 grid of numbers, each between 1 and 9, where the goal is to clear as many numbers as possible in a two-minute time window. In order to clear numbers, one selects a rectangle aligned with the grid, and if the numbers inside of...

code-challenge array grid game puzzle-solver

New Posts

08:05

0

Q: Indices of square numbers that are also pentagonal

First 15 numbers of the A046173: 1, 99, 9701, 950599, 93149001, 9127651499, 894416697901, 87643708742799, 8588189040096401, 841554882220704499, 82463790268588944501, 8080609891439495856599, 791817305570802005002201, 77590015336047156994359099, 7603029685627050583442189501 Your task is simple, ou...

code-golf code-challenge sequence

lyxal

08:42

@NewPosts lol dlosc's (jestful) suggestion to add symbolic algebra to Vyxal came in handy here

emanresu A

How do you flag comments on mobile?

emanresu A

08:59

Can you?

emanresu A

09:10

CMQ: ‘a f’ or ‘an f’?

Adám

an

CMQ: ‘a SQL statement’ or ‘an SQL statement’?

emanresu A

An feels more natural

Fatalize

09:25

@Adám an, an ess queue ell

emanresu A

09:36

o/

PyGamer0

10:07

@NewPosts it got closed, again

New Posts

11:04

0

Q: Slater-Velez permutation

Let's build a sequence of positive integers. The rule will be that the next number will be the smallest number which: Hasn't already appeared in the sequence It's absolute difference from the number preceding it wouldn't be equal to any previous absolute difference between consecutive elements....

code-golf sequence permutations

Adám

11:58

How can can I programmatically detect that help.dyalog.com/latest/#MiscPages/HelpWelcome.htm works and help.dyalog.com/latest/#MiscPages/HelpWelcome2.htm fails?

lyxal

using javascript?

Adám

Doesn't really matter. I have 1217 such URLs, and would like to find out which ones fail.

pxeger

curl -I https://help.dyalog.com/latest/Content/MiscPages/HelpWelcome2.htm

It loads the content page in an iframe

Fatalize

@Adám Recruit an intern to do it manually

Adám

@pxeger Ah, so you're saying I should modify my URLs to point directly to what would be the iframe's content. Smart.

pxeger

12:01

Yeah, it seems to turn the /latest/#... from the base URL into /latest/Content/...

Adám

Perfect. (Why didn't I think of this‽) Thank you so much.

TNB really is the better SO alternative. Instant to-the-point solutions, without the rudeness.

pxeger

@Adám I can be rude if you want me to, you moron!

7

PyGamer0

pxeger is the linux genius

Adám

@pxeger Wow, that's a very honourable title, I don't think I deserve that.

2

PyGamer0

lol

lyxal

12:33

ooh I'm almost a 19k user

I say almost because I'm literally 1 updoot away

and I know there's a message of mine with five stars that states that mentioning rep count usually magically makes it increase

so yeah

Fatalize

You robbed me of an early upvote on your last answer before I saw that it didn’t work :p

PyGamer0

12:49

@lyxal are you?

lyxal

i think i am

PyGamer0

but you have 19007 rep

lyxal

it's close enough

ATaco

How horrible is an “Index Assignment” operator in a language. For instance, l.=concat(b) would call l.concat(b) and store the result in l

pxeger

Raku has that

Adám

13:00

@ATaco Not horrible at all. This is just an extension of the common += etc. However with concat() being an f()-style function, it looks a bit odd. Consider making concatenation an infix operator like +, so you can write l+=b

ATaco

Concat was an example I used because that’s how JavaScript does it

JavaScript of course being a well known good example of language design /s

Adám

Maybe you can come up with a better general syntax for x.f(y)-style functions. I think the function name needs to be together with its container.

Maybe x.f()=b meaning x=x.f(b)

Like x += b meaning x=x+b

Or maybe x.f(=b) meaning x=x.f(b)

pxeger

I think it would make more sense to have x=+b->x=x+b and x=.f(b)->x=x.f(b) where the LHS is basically implicitly inserted between the = and the next operator

But then you lose compatibility with existing C-family languages, of course, if that's important to you

and x=-b could be either x = (-b) or x = x - b, so you'd need to disambiguate that

Adám

Yeah, too much ambiguity there. It'd hurt for every operator that can be both infix and prefix.

pxeger

In sane languages, there is only one

Ginger Industries

13:11

hello

hiya!

ATaco

What I’ve learned is to reconsider my assignment operator

Adám

Tbf, my CTO keeps insisting that our adding "modified assignment" (x f←y works for all infix functions f; even anonymous functions can be placed inline there instead of a name) was a mistake.

Sometimes I find myself writing x{some very long function body here}←y

ATaco

13:35

I think the issue is that indexing is more a postfix than an infix operator, as the right hand side isn’t an expression, just an identifier. So it doesn’t as easily translate as other operators do

Adám

I don't know what kind of indexing you have in mind, but in APLs indexing exists as a perfectly normal infix operator.

Ginger Industries

ni kat nogolfy

ATaco

In many languages, indexing is done via expression.identifier or expression[expression], which is notably distinct from something like add’s expression+expression

ATaco

13:53

I suppose the main reason to consider this is that I don’t want to have to repeat the left hand side of the assignment over and over, especially if it’s a particularly long chain of indexes or something. Maybe it’s be better to have a symbol that just refers to: “The left hand side of the current assignment”

Adám

@ATaco Right, and in APL too, but there's also a separate syntax: expr⌷expr — note how ⌷ looks like [ and ] were squished together.

ATaco

Now that is an infix function

Sandbox Posts

14:59

0

A: Sandbox for Proposed Challenges

Wordle# The game Wordle is quickly becoming popular. The way the game works is as follows: Players are trying to guess a 5 letter word Players have six attempts to guess the word After each attempt, the player is told: a. which letters are in the right place (index) b. which letters are in the w...

Ginger Industries

wrong room lol

Ginger Industries

16:42

anyone know of a good Python markdown parser? (for editing, not converting)

mathcat

@GingerIndustries I know an extension

pxeger

@GingerIndustries mistletoe

Ginger Industries

@pxeger this is for conversion, I want something that lets me edit markdown

mathcat

@GingerIndustries which code editor do you use?

Ginger Industries

@mathcat why do you ask?

mathcat

16:46

nvm

misunerstood you

Ginger Industries

I want to be able to put in a markdown string and get Python objects, which I can manipulate and then convert back to markdown

pxeger

← 9 messages moved from TNB Conlang (katlani)

(@TNB ROs: hopefully a small message move like that is ok; I wanted to keep TNB-conlang discussion on-topic)

Ginger Industries

@pxeger do you have any suggestions?

pxeger

> Renderers for the following "core" output formats exist within the mistletoe module itself:

> AST (Abstract Syntax Tree; handy for debugging the parsing process)

grandBagel

for xml, use xml.etree.ElementTree

Ginger Industries

16:52

@DLosc regex?

DLosc

@GingerIndustries Regex that should match an entire WR and put the katlani word, the part of speech, and the definition in three different capture groups:

^WR: ([\w ]+) $([\w.]+)$: (.*)$

Ginger Industries

@DLosc thx!

pxeger

@DLosc That doesn't handle formatting though

You might need to just strip out backticks, underscores, and asterisks

DLosc

@pxeger Ginger told me there wasn't any formatting in the string they're matching

pxeger

oh, ok

Redwolf Programs

16:58

@pxeger No markdown is ever sent to bots/the users, so you don't even need to do that. Just strip out tags.

pxeger

@RedwolfPrograms oh, it's sent as rendered HTML already? That's quite useful tbh

Redwolf Programs

Yep

DLosc

The Wiktionary entry for "laugh" has a silent video of a man laughing which is kinda creeping me out :P

pxeger

@DLosc The audio clip is creepier!

DLosc

@pxeger It just keeps going! o_0

Sandbox Posts

17:53

0

A: Sandbox for Proposed Challenges

String multiplication table Given two strings, output every pairing of a character from the first string and a character from the second string, formatted into a rectangle Example: input: hello world output: hw ew lw lw ow ho eo lo lo oo hr er lr lr or hl el ll ll ol hd ed ld ld od You make han...

thejonymyster

@DLosc it's silent because he isnt really laughing. the actual audio is too horrid for even wikipedia

src: i was the cameraman and my uncle works for nintendo

DLosc

Wow, Russian SO chat is apparently having a flame war today :P

(IDK what they're saying, tho)

Redwolf Programs

I think it's just one person saying the same thing over and over

DLosc

... and then I look over at our starboard and see:

6 hours ago, by pxeger

@Adám I can be rude if you want me to, you moron!

Great timing =P

caird coinheringaahing

And

6 hours ago, by Adám

@pxeger Wow, that's a very honourable title, I don't think I deserve that.

Adám

18:11

Btw, WP's spelling is biased. The way I'd say it is almost identical to English "moron". Another fun one is a word for rain, "matar" which I'd say as "motor".

DLosc

I suspect that has more to do with the funny ways English pronounces "o" than anything.

Fmbalbuena

19:46

@RedwolfPrograms help me I'm lazy and I can't use the this regex code "/a*/" but "/a*?/". Help me.

Redwolf Programs

Wait, what are you asking?

Fmbalbuena

This is a joke

Adám

22:00

@hyper-neutrino @WheatWizard Can you give chat.stackexchange.com/users/536945/user1129322 access to chat.stackexchange.com/rooms/52405/the-apl-orchard?

hyper-neutrino

@Adám done

Adám

Thanks!

Sandbox Posts

22:17

0

A: Sandbox for Proposed Challenges

Number of arrangements of half a Rubik's cube From a corner-on view of a Rubik's cube calculate the number of arrangements of tiles that are out of view. Your input will provide the state of a Rubik's cube when viewed like the below image: This input will be an array, in any defined order†, grou...

caird coinheringaahing

22:28

How is it that I'd gotten +190 today at 3pm, but am still at +190 now, at 10:30 pm? ಠ_ಠ

Rep gain is so weird, I stg

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