The Nineteenth Byte

Adám

15:00

ikr

pxeger

I think the approach should be ±infinity where logical and NaN definitely never, so I'd go 1 for 0/0

Razetime

@hyper-neutrino Try it online!

hyper-neutrino

okay. so i/0=inf as well?

pxeger

@Adám the rare abbreviated Adám message!

hyper-neutrino

i can store complex infinity technically

pxeger

15:01

well maybe go for complex infinity then

Python has (inf+0j), which is uh interesting

it also has infj

Adám

@pxeger How is that different from inf?

Razetime

Vyxal gives 0/0=0

pxeger

@Adám it's stored as a complex instead of a float

Adám

@Razetime J gives 0 too.

pxeger

@Adám its .imag is still the number 0

Adám

15:02

@pxeger Oh yes, I always forget that other languages (than APL) don't have the principle that a number is a number.

Razetime

@hyper-neutrino jelly gives (nan+infj)

pxeger

that's uhh also very weird

Adám

@pxeger Agreed. NaN is evil.

Razetime

I know zero golflangs other than jelly which have imaginary numbers

pxeger

they're surprisingly uncommonly used I've found

Adám

15:04

But for some tasks, they excel.

pxeger

I don't think Excel has complex numbers

Razetime

they work wonders on some geometry, ascii-art and fractal questions

05AB1E gives 0/0=0

pxeger

tbf Adám you walked right into that one

Razetime

so we have 3 langs which give 0, 1 which gives 0 or 1, 2 which give NaN

Adám

J gives 0 too.

Razetime

15:06

yup that's in the 3

Adám

Oops.

You think ⎕IO and ⎕DIV are bad? Look what NARS2000 has!

pxeger

Crystal gives (-NaN + Infinityi)

the -NaN in that is very weird

Razetime

@Adám i don't think they're bad, they're just extra options, which are also very funny

Aaron Miller

@Razetime In Vyxal, ∆P returns complex numbers

Razetime

oh that's pretty sick

hyper-neutrino

15:13

complex numbers are really good for coordinate manipulation

i use it a lot in AOC

but tbh golfing languages often have better ways of doing said coordinate related tasks with the coordinates themselves and converting from/to complex numbers isn't even great

wolfram alpha says 1/0, -1/0, inf/0 are all complex infinity

Aaron Miller

@hyper-neutrino The only complex number conversions you can do in Vyxal is converting to Int by returning the real part.

hyper-neutrino

ah

Razetime

conjugate would probably be a decent addition

Aaron Miller

@pxeger Apparently Excel does have complex numbers

user

15:38

@Bubbler Oh, nice, I'm looking forward to that

user

15:49

@Adám Having choices is nice, but wow that's a weird way to implement it

pxeger

CMC: code-golf restricted-complexity O(n) version of [a.index(x) for x in range(len(a))]

(i.e., reverse a bijection [0,n) <=> [0,n))

hyper-neutrino

def f(a):
	g=[0]*len(a)
	for i,x in enumerate(a):g[x]=i
	return g

pxeger

yup, that's what I had

~~to the letter lol~~ actually I didn't call it g

user

Ninja'd nvm

hyper-neutrino

invalid I/O ಠ_ಠ

pxeger

15:54

ah, much ~~less Pythonic~~ shorter :p

hyper-neutrino

actually g=a[:] works too

pxeger

@hyper-neutrino uh no?

user

@hyper-neutrino Back in my day, we broke the standard loopholes every day. You youngins have too many silly rules these days

hyper-neutrino

@pxeger why not

pxeger

crone voice Back in my day, we had to walk uphill both ways just to write a variable declaration

@hyper-neutrino that just copies the list, no?

hyper-neutrino

15:57

yes, but every element gets overwritten

user

That's exactly what HN wants

pxeger

oh to initialise the array right

yes ok

hyper-neutrino

yeah

lambda a:(lambda g:[[g.__setitem__(x,i)for i,x in enumerate(a)],g][1])(a[:]) works too but it's longer

pxeger

can probably be shorter with :=

user

Disgusting.

(I meant HN's code initially, but walruses are disgusting too)

pxeger

15:59

@hyper-neutrino lambda a:[g:=a[:],[g.__setitem__(x,i)for i,x in enumerate(a)],g][2] is also 67

hyper-neutrino

for a truly functional program not abusing setitem

lambda a:(lambda f:f(f))(lambda f:lambda g,x,i=0:i<len(x)and f(f)(g[:x[i]]+[i]+g[x[i]+1:],x,i+1)or g)(a,a[:])

user

For some definition of functional :P

hyper-neutrino

although this is no longer linear

at which point you may as well just do [a.index(x)for x in range(len(a))] because it's quadratic i think

due to list slicing

pxeger

@hyper-neutrino this is no longer linear — every functional programmer ever

hyper-neutrino

:p

user

16:03

@pxeger That implies they could have a solution that's as good as O(n^2) :P

pxeger

lol

hyper-neutrino

what's a reasonable behavior for a range built-in on strings?

Adám

@hyper-neutrino Are your strings "atomic" or actually character arrays?

user

A range builtin on characters could give all characters up to that, and a string could be the vectorized version of that

pxeger

range built-in as in (on integers) "produce the list [0,n]" (or similar range)?

hyper-neutrino

16:05

they are character sequences but some built-ins behave uniquely when the sequence is finite and every element is a character (i.e. it's a "string")

@pxeger well i'll have [1, z], [0, z], [1, z), and [0, z)

(and similar behavior i consider reasonable for complex numbers too)

user

Why not just use flags to choose which behavior you want for each occurrence of the range function? :P

Adám

@hyper-neutrino So does it take one or two arguments?

hyper-neutrino

@user well i'm going to have flags to alter implicit range behavior but i'm gonna have a builtin for each :p

@Adám just one, although i'll have dyad range builtins too and i'll need to decide what to do with those

but i might get some ideas if i decide how to do monad range on string

Adám

@hyper-neutrino Try it online!

hyper-neutrino

Oh, cool. I think that / something similar makes sense. thanks

i'll probably vectorize that instead of implicitly taking cartesian product

pxeger

16:27

@hyper-neutrino attempt to parse as integer and construct range upto that? And if not integer, construct infinite range? Or empty list?

EliteDaMyth

16:47

hello!

pxeger

\o

Adám

○/

EliteDaMyth

interesting, ive been somewhat active on the site since a few months, and i havent sent a single message here

Adám

@EliteDaMyth That doesn't sound right. This room is very active.

EliteDaMyth

well now that i've found it

i guess i'll be more active here

hyper-neutrino

16:52

CMC: find the user with the highest reputation on CGCC who has not sent a single message in TNB

Adám

Ever?

hyper-neutrino

yep

Adám

Arnauld?

caird coinheringaahing

Anders I believe

@Adám Arnauld chats here from time to time

Adám

Oh.

hyper-neutrino

16:54

most recently June 9th

caird coinheringaahing

I don't believe ZaMoC has ever been in chat

Adám

nimi?

caird coinheringaahing

The only one I'm uncertain about above Anders is Emigna, but I think they have

@Adám nimi used to be fairly active way back when

EliteDaMyth

@pxeger engineerexcel.com/complex-numbers-in-excel

Adám

SE chat search is broken.

hyper-neutrino

16:57

emigna talked here in 2019

caird coinheringaahing

What about Anders?

Adám

Jun 3 '17 at 22:09, by isaacg

@AndersKaseorg Check out this answer https://codegolf.stackexchange.com/a/124454/20080

hyper-neutrino

most recently 2017

caird coinheringaahing

Everyone above me in rep I know to have talked here, I'm not sure about Joe Z (think he has), edc65, DavidC or alephalpha

Past them, ZaMoC is the only 20k+ user I'm unsure about

Adám

Mar 31 '16 at 21:57, by edc65

http://codegolf.stackexchange.com/posts/76591/revisions

hyper-neutrino

17:00

Jan 1st 2017 by Joe Z

Mar 31 2016 by edc65

how do y'all get the chat profile for a user

caird coinheringaahing

@hyper-neutrino ninja'd :P

Adám

DavidC then.

caird coinheringaahing

@hyper-neutrino Apparently mods have a shortcut

hyper-neutrino

do you just either search for them in this room's search bar or search for their user in the user list on chat homepage or smth

@cairdcoinheringaahing yeah the dashboard just gives me a link to the chat profile directly :p

Adám

Much cheat. Very mod. Wow.

caird coinheringaahing

17:01

in 2021 Science Fiction & Fantasy Stack Exchange Moderator Election Chat, yesterday, by SQB

Hey, how does one go from a stack user profile to the related chat profile? Is there a path?

hyper-neutrino

the SFF election seems relatively tame so far which is good to see :P

at least from what i can tell

caird coinheringaahing

Aside from b_jonas having no idea who to vote for

And user931

hyper-neutrino

553 voters so far according to constituent

ofc I don't know much about the candidates or the site but from what I know, there are several candidates who'd all be good for the spot so it seems like it'd be hard to decide who to put first

caird coinheringaahing

Yeah, I could reorder my top 4 in any order and be happy

user

17:48

Wow, the SciFi chat theme is terrible

pxeger

agreed

Adám

18:21

@EsolangingFruit U+FE0E

Newly Featured Posts

0

Q: Print this text in Scala

Print the following text and nothing else: <html> <body> <p>HTML is kinda annoying</p> </body> </html> I'm happy I'm not a web developer. The catch? Your code must fit the template: print(<?>), where ? can be any group of characters. You can paste your completed code (with the print(<>...

Anush

Did anyone attempt my CMC?

user

What was it?

Anush

@user implement a linear time solution for the fractional knapsack problem

user

18:37

Your CMC's are often rather difficult :P

Sounds like you could post a proper challenge involving that

ngn

@Anush can you give some sample inputs and outputs?

@user this one is easy. the "fractional knapsack problem" is not really a knapsack problem

2

Anush

@ngn sure. I can't today but will soon

@user this one is no harder than randomised median finding and easier than quicksort :)

I find it odd that there are no implementations online so we should fill the gap!

EliteDaMyth

Wot is a cmc?

user

@ngn ¯\_(ツ)_/¯ Anything with the word "problem" in its name seems hard to me :P

@EliteDaMyth Chat Mini Challenge

36

Q: What are our specific abbreviations and terms?

Newcomers to codegolf.SE are often compelled to ask what many of our abbreviations and terms mean. Let us list them here so this information always will be easily available. Return to FAQ index

discussion support faq new-users chat

EliteDaMyth

interesting

is there a way to search for these

user

18:47

Ctrl+F :P

EliteDaMyth

Wont work for unloaded messages, i guess the search thing on top right is better

user

Oh, I thought you meant you wanted to search for abbreviations, not CMCs

ngn

instead of "cmc:" why don't we start writing just "challenge:"? "chat" is clear from context, "m" could mean anything from mini to mega, the only meaningful part is the second "c". it would be easier for newcomers to understand it if it's just "challenge:"

user

Good idea, although it goes against the spirit of code golf :P

EliteDaMyth

@user oh no, im not that dumb

hyper-neutrino

18:50

@ngn that's not as golfy

ngn

"c:" then? :)

hyper-neutrino

lol

that'd actually not be a bad idea though - we spend more bytes explaining what a CMC is than we would save typing CMC instead. I guess it's just become part of this room's culture / people do it by habit lol

but yeah, like using challenge:, question:, poll:, etc. makes just as much sense ¯\_(ツ)_/¯

user

For backwards compatibility and easier searching, I propose we use the format "CMC Mini Challenge: Write some short code to make me a milkshake"

hyper-neutrino

relevant

user

Chat Mini CMC Macro Challenge: Make a milkshake using code

hyper-neutrino

18:55

vote to vtc to close as underspecified

Adám

@hyper-neutrino I vtc your message as overspecified.

hyper-neutrino

:(

user

@Adám You mean you want to migrate it to Code CR Review? :P

@hyper-neutrino Turn that frown upside down

hyper-neutrino

):

or :(

user

smh my head it's :(

hyper-neutrino

18:58

depends on your axis of orientation

ngn

depends on your PoV of view

user

@hyper-neutrino For ): to be the upside down form of :(, your laptop would have to be tilted 90 degrees counter-clockwise o.O

hyper-neutrino

or clockwise

in fact arguably clockwise is more correct if you consider the correct and the upside-down orientation of a face

user

Oh right, I could've just said that instead of typing 8 more letters

@hyper-neutrino You Americans never consider the rest of the world, do you?

Haven't you ever met someone from Australia?

hyper-neutrino

> american

Adám

19:02

CMC Mini Challenge: Given a string consisting of three space-separated words, Replace the first word with the initialism for the three words. E.g. Point of View → PoV of View and Chat Mini Challenge → CMC Mini Challenge and laughing out loud → lol out loud

user

You're from one of the Americas, aren't you?

@Adám You were ninja'd by caird yesterday

Adám

⍨

ngn

@Adám 17 in k9

hyper-neutrino

@user canada is in NA, yes

Adám

Geography Quiz: Name a country that spans North America and Europe, but the majority of the land mass is in North America.

ngn

19:05

denmark?

Peilonrayz

@Adám Greenland?

Adám

Yup.

user

Which one?

Adám

That one.

hyper-neutrino

yes

EliteDaMyth

19:06

@user Javascript, 621 bytes

user

Very helpful.

hyper-neutrino

greenland is part of denmark

EliteDaMyth

regpack for the win

hyper-neutrino

greenland is the land mass in NA, denmark is the country, so technically denmark is a more correct answer, but both make sense

user

@EliteDaMyth That's a nice milkshake

Did you make it yourself?

Anush

19:06

@hyper-neutrino not quite

user

@hyper-neutrino Oh

hyper-neutrino

> Greenland is an autonomous territory[11] within the Kingdom of Denmark

EliteDaMyth

@user no, i googled ascii art milkshake

Anush

@hyper-neutrino yes

Peilonrayz

@hyper-neutrino Oh, TIL

Anush

19:08

They have quite a lot of food from Greenland in Danish shops ( think fish)

Adám

They probably have more Danish food in Greenlandic shops.

Geography Quiz: Approximate length of land border between France and the Netherlands.

user

Approximately 1 millimeter

Adám

Nope, that's wrong. Answering the right order of magnitude is fine, but you're way off.

ngn

is it something in south america?

user

¯\_(ツ)_/¯ You said approximate :P

Hmm, the Wikipedia page doesn't seem to provide any clues

Adám

19:13

@user Nope, no clues, just the plain-text answer.

Neil

TIL both "Dennis the Menace" and "Dennis the Menace" first appeared on March 12, 1951

Adám

@ngn No.

@Neil Both‽

Peilonrayz

@Adám I'd guess like 100 miles. Probably more but IDK French and Danish colonies

Adám

@Peilonrayz Danish?

Peilonrayz

Netherlands, the land of the Danes

Neil

19:14

@Adám yeah, there's a syndicated comic strip in the U.S. with that name, and it's the name of a comic strip which appears in the Beano

Adám

Oh.

Neil

sorry, I should say "The Beano"

Adám

@Peilonrayz Uh, you got that wrong. The Netherlands is the land of the Dutch, and Denmark is the land of the Danes.

Peilonrayz

@Adám Oops D:

Adám

People also confuse Switzerland and Sweden because the demonyms are Swiss and Swedish.

hyper-neutrino

19:17

be glad you made that mistake here and not in TL; the, like, 10 dutch mods online at any time would instantly obliterate you xD

Peilonrayz

I should have remembered Dutch, not like one of my co-mods is Dutch or anything... nope D:

Adám

I don't think so. I'm sure they're used to the confusion, just like the Danes are.

@Peilonrayz It says on your profile that you live in the United Kingdom. That means you're native American speaker, right?

Peilonrayz

Yeah, we speak American over here ;)

Adám

Where in the UK, if you don't mind? (I'm in NE London.)

Peilonrayz

I used to be N of London but now I'm S of London.

Underslash

19:33

idea I just had to extend the codepage of a language: you have 512 commands, and can rotate the codepage based on the first byte

Adám

That's an interesting idea, if you could separate the built-ins into, say, mathematical and text-processing groups.

A lot of general-purpose built-ins might be universally needed, though.

Underslash

that is true

and if you wanted to go further, two bytes could probably specify a ton of different patterns to encode with

ngn

@Adám caribbean?

Adám

@ngn Yes.

ngn

Saint Martin (island)

Saint Martin (French: Saint-Martin; Dutch: Sint Maarten) is an island in the northeast Caribbean Sea, approximately 300 km (190 mi) east of Puerto Rico. The 87-square-kilometre (34 sq mi) island is divided roughly 60:40 between the French Republic (53 km2, 20 sq mi) and the Kingdom of the Netherlands (34 km2, 13 sq mi), but the two parts are roughly equal in population. The division dates to 1648. The southern Dutch part comprises Sint Maarten and is one of four constituent countries that form the Kingdom of the Netherlands. The northern French part comprises the Collectivity of Saint Martin and...

Adám

19:41

Correct.

New Posts

19:57

0

Q: Tips for Code Golfing in Desmos

Desmos is mainly used as an online graphing calculator, but its graphical and mathematical functionalities can also be applied in certain coding challenges. I know not that many people use Desmos on this site, but for the people that do, what are some tips for golfing in Desmos? As usual, please ...

code-golf tips

Underslash

finally

A username

I feel like there are at least three different conversations going on here at once.

pxeger

Here: I'll draw a line under them all so we can be coherent again:

A username

Also,

> halp my CODEZ DON"T WORK!!!! plz send teh codez quik!

user

here ar ur codez

Yoo spik bad English, spik lolcod ensted

EliteDaMyth

21:23

why no use lolcode fur gulfing

Codidact Posts

22:09

New Posts - Challenges - Code Golf: Word Count Tool

posted on June 20, 2021 by Quintec

In Google Docs, the word count tool looks like this: Pages would not make sense, but y...

Bubbler

23:05

Any feedback on any of these?

(cc @WheatWizard for this NP complete thingy)

hyper-neutrino

how do you exponentiate complex numbers / arbitrary decimals? since i'm using JS and representing numbers with a custom format (since unlike Python it doesn't have built-in imaginary numbers) i can't just throw a ** in

caird coinheringaahing

De Moivre's theorem would probably be helpful

en.m.wikipedia.org/wiki/De_Moivre's_formula

ಠ_ಠ stupid mobile

hyper-neutrino

oh yeah that looks helpful, i'll take a look thanks

lyxal

The best part is that it shows normally in the transcript when viewed on mobile

@cairdcoinheringaahing ^

hyper-neutrino

se chat go brr

caird coinheringaahing

23:21

@lyxal But it doesn't onebox

New Posts

0

Q: Can you give me half? (No digits)

The task is to provide code that evaluates to 0.5 numerically, i.e. the output must be recognized by your chosen language as a numeric value (Number, float, double, etc), not as a string. The catch, the characters 0 through to 9 cannot be used. This is not a golfing challenge, this is a popularit...

popularity-contest restricted-source

caird coinheringaahing

@NewPosts This is unlikely to be interesting in any language imo

Bubbler

@lyxal And it doesn't work either when you enter mobile mode on desktop (Chrome)

Jo King

@NewPosts oof, popcon with nothing to work towards except "creativity"

hyper-neutrino

yeah, I strongly feel like this challenge isn't particularly interesting but... ¯\_(ツ)_/¯ not gonna vote on it

Adám

23:31

Technically speaking, it is well-formed, but agreed, not interesting.

Jo King

@Adám oof, i was going to do the exact same Raku answer, thought i don't think you technically need the say part

Adám

What do I put in Header/Footer to avoid it?

Jo King

uhh, put the say in the header i guess?

Adám

Hm, but then again, it isn't CG.

hyper-neutrino

i think the trivial answer in python is just to do smth like len(" ")/len(" ") but that's boring

Adám

23:39

@NewPosts I'm going to win this one in the category for "cutest submission"!

caird coinheringaahing

Honestly, I can't think of any way to get 0.5 that isn't just dividing one number by its double. Everything else is just needlessly convoluted

The only room for creativity here is getting 1 and 2 (or 2/4, or whatever), and even those aren't especially creative

Adám

Anyone knows how to make Brachylog solve x÷x=x+x?

hyper-neutrino

@NewPosts . also works in yuno, totally not because the literal system is entirely just a carbon-copy of jelly :P

Jo King

@Adám doesn't Brachylog only deal with integers? i don't think i've ever seen an answer using fractions

Adám

Oh, I didn't know.

@JoKing github.com/JCumin/Brachylog/wiki/…

Jo King

23:52

sorry, i meant like how the searching part does 0,1,-1,2,-2 from my memory

Adám

Oh.

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