The Nineteenth Byte

Seggan

12:51 AM

just learned of http.cat

lyxal

Wake up babe new vyxal version just dropped

in Vyxal, 7 mins ago, by Vyxal Bot

Vyxal version 4.2.0

OldSandboxPosts

Sandbox posts last active a week ago: Optimize Distance Travelled By Thrown Object (With Air Resistance)

Seggan

@lyxal whoa

is it saturday for you already

lyxal

3 hours ago, by lyxal

Ooh it's my 4th favourite day of the year today :p

LotM Nomations

3:18 AM

0

A: Nominations for Language of the Month, Take 2

GS2 GS2 is a golfing language inspired by J and machine code. It was probably the first golfing language that uses a 256 byte instruction space. GS2 is a very competitive language, despite being created in 2013. Furthermore, some of the ideas first introduced in GS2 (Number shorthands, rest-of-pr...

Aiden Chow

3:35 AM

Huh, I don’t think we r doing any more lotm right…

lyxal

I don't know

emanresu A

Yeah, there hasn't been one since january

lyxal

Because people haven't been around to teach the lotm language

emanresu A

Don't worry; if nobody's interested to post one, it can wait. If it dies, that is, turns out to be inactive for months, then the community is most probably not very interested in it anymore. — Erik the Outgolfer Oct 2, 2018 at 18:50

Unrelated String

4:10 AM

wait how did this happen the same way already

I think it's a combination of everybody thought it was someone else's responsibility and interest waning, but that's just my impression. — DJMcMayhem Oct 2, 2018 at 17:59

Rydwolf Programs

We need to do what the Romans did and elect dictators of the site

That way we all have an absolute leader to blame if things get forgotten

caird coinheringaahin g

@lyxal Why did you unprotect this?

lyxal

Because it didn't need protection anymore

It hasn't been interacted with for years

It's not in danger of having a flood of incorrect answers

And the fact it took almost 3 months for anyone to notice suggests it isn't crucial to protect it

Sandbox Posts

6:24 AM

0

A: Sandbox for Proposed Challenges

Soundproof Cell code-golf kolmogorov-complexity Here's a message from the organizers: Hello! We hope this message finds you well. Unfortunately, your performance in the past games has been sub par. Your team is unimaginative and lacks creativity. Instead of inventing novel techniques to win our ...

Huỳnh Trần Khanh

must be the weirdest challenge I've ever thought of. well I stole the idea from another person which I'll give credit to later. you can give me some feedback to improve the challenge before it goes live

lyxal

6:48 AM

@lyxal the irony here is that the current shortest answer of 6 was found by someone with less than 10 rep who couldn't post it as an answer at the time :p

caird coinheringaahin g

Ooo, I am 19 upvotes and 28 answers away from a golf discussion badge on meta :P

lyxal

7:09 AM

@cairdcoinheringaahing by my calculations, it's only 28 answers

caird coinheringaahin g

As in, it's implied that I'll get 19 upvotes in 28 answers?

lyxal

No, as in currently speaking, it's only 28 answers

0 more upvotes needed by my calculations

Neil

7:27 AM

huh, a downvote, I wonder what attracted it this time

caird coinheringaahin g

@lyxal according to my badge tracker, it's 1 upvote away :P

lyxal

@cairdcoinheringaahing dah frick

So close but so far

caird coinheringaahin g

I'm sure I'll be stuck on 999/1000 for the next 27 discussion answers I post

lyxal

Probably

caird coinheringaahin g

9:38 AM

CMC: Given a black box function as a predicate f, which takes a natural number and returns either true or false for that number, and a positive integer n, output the first n positive integers such that f is true, and the first n such that f is false

Clear distinction between the two outputs, otherwise, whatever format

emanresu A

In vyxal ȯ solves the first half but there's no easy way to invert a black box function

lyxal

Try it Online! for 10 bytes

Actually wait no

Try it Online! for 8 bytes

@emanresuA logical negation of the result

7 bytes using that flag that reenables implicit output

@cairdcoinheringaahing how many jelly bytes?

caird coinheringaahin g

I think I can do it in 7

Nope, doesn't quite work, damn 0 :/

lyxal

Solution: change the CMC specs

caird coinheringaahin g

9:54 AM

A disgusting 11 bytes ಠ_ಠ

lyxal

What was the 7?

caird coinheringaahin g

ÇC$#,Ç#, but it fails as it tried to take input twice

..I think

It failed for something to do with #

emanresu A

@lyxal 7, 6 with o

I love infinite set logic

lyxal

@emanresuA no

caird coinheringaahin g

Oh yeah, you may assume that f returns true for an infinite number of inputs, and false for an infinite number of inputs

lyxal

10:01 AM

Ah

@cairdcoinheringaahing CMC: this but for all integers assuming the order 0, 1, -1, 2, -2, ...

caird coinheringaahin g

@lyxal CMC: this, but for all integers. You may decide the order, which must be consistent across all inputs

:P

lyxal

I still have 9 bytes under that :p

But mainly I thought that was a pretty standard ordering

caird coinheringaahin g

It is

I just wonder if there might exist some better ordering :P

Neil

11:48 AM

@cairdcoinheringaahing x=>(x&1?~x:x)/2 is the golfiest map from nonnegative to all integers that I could find but it goes 0, -1, 1, -2, 2, ...

actually I just found x=>(x^-x%2)/2 (same output)

Seggan

12:33 PM

wat

lyxal

thems a lot of pings

Seggan

april fools prob

reading all messages no worky

lyxal

heh I've seen server icons like that before

Seggan

1:10 PM

in The APL Orchard, 6 hours ago, by RikedyP

Announcement: New language extension: flip individual scalars in v19.0 - read about it in our latest blog post https://www.dyalog.com/blog/2023/04/extending-structural-functions-to-scalars/

caird coinheringaahin g

@Seggan Oh god

APL's becoming more and more like a golfing lang

lyxal

kinda sad SO/SE didn't do anything chicanerous for April Fool's' this year

Ginger

1:31 PM

would it be okay for me to invisibleify my name for today? (@cairdcoinheringaahing @hyper-neutrino)

Seggan

@cairdcoinheringaahing dont tell @Adám!

caird coinheringaahin g

@Ginger Why? April Fools?

Ginger

yus

just for today of course

Sʨɠɠan

ninja'd

caird coinheringaahin g

I mean, I'd prefer if you didn't, but I'm not gonna stop you or change it back if you do

Ginger

1:34 PM

@cairdcoinheringaahing on the one hand I did get in trouble the last time I did it but on the other hand it's april fools

I dunno

lyxal

Chicanery! Do the fool thing!

Ginger

~~shame you're not a mod~~

I'm going to do it but I will also blame you if it goes wrong

caird coinheringaahin g

Oh, so I'm blowing up lyxal's fridge again?

Ginger

DAMN IT

they fixed the character I used last time!

lyxal

@Ginger I mean you can kinda say that about a lot of things when you think about it

Ginger

1:38 PM

lol

lyxal

@cairdcoinheringaahing you didn't already have that planned for today?

caird coinheringaahin g

@lyxal Nah, that was gonna be the prank

You'd expect your fridge to be nuked, but nothing would actually happen

lyxal

Ffs the one day I need it too.

You see I'm expecting a delivery tomorrow but they don't deliver it you already have a fridge

︎︎ᅠ

ㅤ

lyxal

And the deposit is non refundable too

@︎︎ᅠ it's April fools not Halloween no need to startle me like that

Jack o lantern looking mfer

︎︎ᅠ

1:43 PM

I have seen unholy things, Lyxal Golfing

also, for today only my pronouns are 𒈙/𒈙

lyxal

@︎︎ᅠ Yeah but that doesn't excuse your carved pumpkin ahh looking picture

Bingus.

︎︎ᅠ

> carved pumping

*halloweens sexily*

lyxal

Heh idiot you're supposed to report the edit error after 2 minutes :p

@︎︎ᅠ also, that's what she said

Bbrk24

Whatever that character is, it looks really weird in the replies, because it overlaps with the following word on my device

Like in lyxal’s last message, the @<that thing> overlaps with the first two letters of “also”

lyxal

~~skill~~ device issue

Firefox on mobile renders it without overlap

Bbrk24

1:51 PM

I am on “Firefox”, it’s just that iOS requires all browsers to be Webkit-based, so really it’s like I’m using Safari

lyxal

Oh yeah that's right you're on ios

Laughs in Android

Bbrk24

I’m on iOS because my family’s cell service provider offers a discount on iOS devices

lyxal

Fair enough

Bbrk24

When I was in elementary school we had a different cell service provider, and my parents had a Samsung phone

It was a camera phone. One day last year, we found it again while cleaning. I told my mom, and my little brother just asked “what’s a camera phone?”

Sʨɠɠan

what is a camera phone

lyxal

1:58 PM

A phone with a camera

Like literally a camera

Samsung made some once

Bbrk24

It’s pretty standard for smartphones nowadays to have cameras but there was a time when a camera built into a phone wasn’t a given

lyxal

Oh wait you aren't talking about the smart cameras Samsung made?

Bbrk24

I don’t remember the exact model

It had a physical keyboard you could pull out though

and it’s much smaller than modern phones

lyxal

Oh see I'm talking about the smart cameras

math scat

@Bbrk24 Imagine not using a smart toaster

Bbrk24

2:04 PM

No this was a cell phone (hence the “phone” part of “camera phone”), it could do calls and SMS

it just. also had a camera

lyxal

That's what I mean

Bbrk24

yeah no definitely not that

lyxal

Camera on the front, phone like screen on the back

@Bbrk24 Oh

Bbrk24

the camera was more like that of a modern phone, embedded near the edge of the device

Sʨɠɠan

@lyxal what

New Posts

2:06 PM

0

Q: Make a Custom Bayer Matrix

A Bayer matrix is a threshold map used for ordered dithering that gives the illusion of having more shades of color than actually present by using a crosshatch-like pattern. Bayer matrices are square with a side length that is a power of 2. Here are some examples: \$ \displaystyle\frac{1}{4} \tim...

︎︎ᅠ

@Bbrk24 it's actually 3 characters :p

required in order to fool SE into letting me do it

> tasks.named<Test>("test")

I can't

task named test

Sandbox Posts

0

A: Sandbox for Proposed Challenges

Doors and guards Related but noticeably different You are the leader of the guard in the dungeon of an ancient castle. There are N doors and N guards with keys. Guard with index i may operates with doors that have multiple indexes: i, 2 i, etc. The way he operates is very dumb: he just toggles st...

TwilightSparkle

4:15 PM

So, I see many optimizing BF interpreters

They said that it can do much more than simply executing each instruction

So how did it work?

Is it just detecting some patterns like [a+b-]or is it something more elegant

Bbrk24

4:53 PM

From awib's README:

> - Sequences of '-','>','<' and '+' are contracted into single instructions. E.g. "----" is replaced with a single SUB(4).
- Mutually cancelling instructions are reduced. E.g. "+++-->><" is equivalent to "+>" and is compiled accordingly.
- Some common constructs are identified and replaced with single instructions. E.g. "[-]" is compiled into a single SET(0).
- Loops known to never be entered are removed. This is the case for loops opened at the very beginning of a program (when all cells are 0) and loops opened immediately after the closing of another loop.

︎︎ᅠ

5:58 PM

how tf do I parse XML with Kotlin

why is this so difficult to do

@Sʨɠɠan help meeeeee

user

6:22 PM

Jackson's good if you're on the JVM

There's a Kotlin module, in fact

If you're using a JVM language, there's tons and tons of Java libraries for you to use

︎︎ᅠ

found a suitable module, nvm

~~only problem is it was last updated in 2013~~

user

You probably want to use Jackson, then

Are you making something that's cross-platform?

︎︎ᅠ

nope

@user I saw that but couldn't figure out how to use it

whereas this other library has excellent docs

user

6:39 PM

What library is this?

@︎︎ᅠ Hmm, Jackson's last 1.x release was also in 2013

︎︎ᅠ

@user ~~coincidence~~

@user simple.sourceforge.net

Neil

7:31 PM

@pxeger if you're going to run HSTS, do be sure to keep your cert up-to-date!

pxeger

I don't know what you're talking about ;)

Honestly I'm surprised that's never happened before

certificate automatic renewals were completely broken

emanresu A

Petition to change ATO to pink for april fools

pxeger

8:00 PM

too late

Jacob

why is too late :(

pxeger

april fools jokes are only allowed before midday, and it's after midday almost everywhere on the planet

although incidentally when I saw the new tailwind release I considered tweaking ATO's colour scheme to some different shades of grey

pxeger

8:36 PM

@emanresuA maybe I'll do it next year and then gaslight everyone into thinking it's always been pink

Rydwolf Programs

Since when are they only allowed before midday

@user Not like XML changes over time

If anything I'd be more concerned if it was constantly being updated

Since that would mean new bugs are constantly being found

user

8:58 PM

@RydwolfPrograms I was pointing out the coincidence that both Jackson 1 and Ginger's Simple library were last updated in 2013

But yes, it's fine to use an old but proven library for XML

Bbrk24

9:40 PM

Re: this challenge codegolf.stackexchange.com/questions/259618/…, I'm sure it's possible to take advantage of the fact that Swift 2 had a stable hashValue property, but I'm not sure how best to manipulate the hash values to get the right order. Starting in Swift 3, hashValue changes from run to run, hence why I specify Swift 2.

Tangentially, I've never seen a code editor nearly as laggy as the one built into SwiftFiddle

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