The Nineteenth Byte

Lyxal

1:02 AM

It took a bit of fiddling but I was able to beat the Jelly answer

Carry on with your day

New Sandboxed Posts

2:12 AM

0

A: Sandbox for Proposed Challenges

Is this Chessboard Reachable? The goal of this challenge is to determine, given the state of a chessboard, whether or not that chessboard can actually be reached in the course of standard play. Of course, doing this in general is a rather hard problem, so we'll be simplifying the problem to a set...

New Sandboxed Posts

2:37 AM

0

A: Sandbox for Proposed Challenges

Identify the tonal from a key signature Objective Given a key signature in major, output its tonal. Input An integer from -14 to +14, inclusive. Its absolute value is the numbers of flats/sharps. Negative number represents flats, and positive number represents sharps. Note that theoretical keys a...

HighlyRadioactive

4:15 AM

New 1+ answer

New Main Posts

5:21 AM

0

Q: Find the slope of a line

Introduction Given the equation of a line, find it's slope. Challenge \$y = mx + c\$ is the general equation of a line. You must find slope \$m\$. The Input will be given in as a string. E.g: "0.3x+0.2y=4" You can take input from stdin, or function parameters, or command line options. You can p...

Lyxal

8:59 AM

#finally-got-my-code-golf-silver-badge

Y'all proud?

But I somehow got it twice

HighlyRadioactive

10:35 AM

@Lyxal Of course.

But one thing that caught my eye when I enter your user page is:

Top tags (69)

"Fun", isn't it?

Lyxal

11:04 AM

@HighlyRadioactive nice

HighlyRadioactive

11:20 AM

@Lyxal LOL Memelord

HighlyRadioactive

12:51 PM

Digging old 1+ chat messages...

> Seriously I think I need a C++ brute-forcer
> As I don't know Java

Now I have my own.

HighlyRadioactive

1:59 PM

@Lyxal Facts:

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

Road Sort Order In Britain, road identifiers use a scheme of a letter, followed by a 1-4 digit number. From Most-Important to Least-Important, the letters are: M A B C D U The numbers also represent further assumptions around the importance of the road, such that a 1-digit number is more import...

HighlyRadioactive

1. Lyxal can do Python-only challenges in Keg.

2. Lyxal golfs a program by standing there waiting, and his experienced keyboard & mouse (which learned from his keystrokes) do it for him.

3. Lyxal can refer to memes that predates his message.

4. Lyxal is the code golfer.

caird coinheringaahing

@HighlyRadioactive Don't you have a room to specially spam about Lyxal?

4

HighlyRadioactive

5. They said Lyxal made the universe using a bunch of rocks, but no one except Lyxal knows he made a Keg program that makes the universe. Infinity+1 per second.

@cairdcoinheringaahing That one's about 1+...

This is not spam, this is ~~obvious facts~~

(Don't suspend me again!!

caird coinheringaahing

@HighlyRadioactive What was the room with the name full of random characters?

HighlyRadioactive

2:08 PM

@cairdcoinheringaahing It's not random characters it's a perfectly valid 1+ program!

I golfed it quite a bit today

caird coinheringaahing

@HighlyRadioactive Ok, but that isn't my point. These "facts" really aren't on topic here

my pronoun is monicareinstate

@HighlyRadioactive Did you write a metagolfer for that? (asking because I'm considering writing one to outgolf all of you)

HighlyRadioactive

@mypronounismonicareinstate Yes but it is very naive

I'm considering rewriting it ~~using Lyxal technology~~

Also the room is renamed to the original Increment now because Lyxal feels offended

6. Lyxal hides himself pretty well using his finest magic square. No magic can find him.

caird coinheringaahing

@HighlyRadioactive Just in case this wasn't clear, I'm asking you to stop spamming please

HighlyRadioactive

@cairdcoinheringaahing ~~spam spam spam~~ nvm I'll stop

Third-party 'Chef'

2:17 PM

Lyxal should put these on his userpage...

HighlyRadioactive

Oh hi TPC

I continued on Sandbox actually

Raghu Ranganathan

hello there

bit new here

HighlyRadioactive

@RaghuRanganathan Hello!

Raghu Ranganathan

whats the dicussion going on now

HighlyRadioactive

Uh nothing

Third-party 'Chef'

2:21 PM

We defeated HighlyRadioactive

HighlyRadioactive

I'm posting Chuck Norris Facts except it is processed with /Chuck Norris/Lyxal/

Raghu Ranganathan

ok I don't know what that means

but cool

Third-party 'Chef'

Aka. ~~I'm posting Lyxal Facts except it is processed with /Lyxal/Lyxal/~~

HighlyRadioactive

My way of welcoming newbies is go upvote all their answers

Raghu Ranganathan

It's golf or be golfed

HighlyRadioactive

2:24 PM

Except for those who refused to follow the rules, in that case I will downvote them

Raghu Ranganathan

I'm trying to maketiny programs in Ruby

Third-party 'Chef'

You are making them suffer the problem of serial upvoting.

Raghu Ranganathan

This dude name Dingus has been really helpful

Adám

67

Q: Tips for golfing in Ruby

What general tips can you give for golfing in Ruby? I'm looking for ideas that can be applied to code golf problems in general that are specific to Ruby. (For example, "Remove comments" would not be an answer.) Please post one tip per answer.

code-golf tips ruby

Raghu Ranganathan

I got that bookmarked, thanks

HighlyRadioactive

2:25 PM

@Third-party'Chef' oh ok

~~that's a way to learn isn't it~~

Things to note:

Third-party 'Chef' == petStorm == A _

Raghu Ranganathan

?

Third-party 'Chef'

I am known for changing usernames. I change my username every single month.

Raghu Ranganathan

oh interesting

Third-party 'Chef'

^^ This HighlyRadioactive dude over here forgot most of my usernames.

Raghu Ranganathan

whats a good golfing language to start with

I see 05AB1E and Jelly everywhere but none of it makes sense

Third-party 'Chef'

2:28 PM

@RaghuRanganathan 05AB1E. Being simple to learn & program, you can easily achieve a high score.

HighlyRadioactive

@RaghuRanganathan 05AB1E does not make sense????

That's completely false

05AB1E is an awesome language

Third-party 'Chef'

05AB1E does not make sense does not make any sense to me... once you learnt the basics, it would be extremely easy to program in that language!

Raghu Ranganathan

Ok I'll put some time into it

HighlyRadioactive

@Third-party'Chef' Agreed

See also:

Pyth

Stax

CJam

Tips for golfing in 05AB1E

~~I'm tempted to create an esolang called "Tips for golfing in 05AB1E" now~~

Third-party 'Chef'

(By the way, nph created a new golfing language)

HighlyRadioactive

2:30 PM

@RaghuRanganathan ~~Also 1+~~

@Third-party'Chef' The one that compresses "Hello, World" poorly?

my pronoun is monicareinstate

I program in Jelly by rearranging related built-ins until the program does what I want. If I cannot find a permutation that works, I start adding quicks (mostly those with complicated descriptions) in random places. This almost always works.

Raghu Ranganathan

lol you were just talking about 1+ right

HighlyRadioactive

@RaghuRanganathan wait waht

Raghu Ranganathan

some group name was an executable 1+ program

HighlyRadioactive

11+1<h r1ght y11+1<u m111++11+"+n th1s 11+1<ne

Raghu Ranganathan

2:33 PM

@my

HighlyRadioactive

> @cairdcoinheringaahing It's not random characters it's a perfectly valid 1+ program!

Raghu Ranganathan

you edited one of my questions right

Third-party 'Chef'

@HighlyRadioactive Wait, you forgot about Japt

HighlyRadioactive

No I didn't

@Third-party'Chef' And Keg. How silly I am!!!

Third-party 'Chef'

And Gaia.

HighlyRadioactive

2:35 PM

~~and x86 machine code according to your user page~~

And GolfScript!!

Branchylog!!

Third-party 'Chef'

There's a huge list of them, you can look at this analysis

Raghu Ranganathan

Integral looks cool as hell

HighlyRadioactive

Burlesque!!!

Raghu Ranganathan

ok too many languages

HighlyRadioactive

FlogScript!!!

my pronoun is monicareinstate

2:35 PM

@RaghuRanganathan I haven't edited anything since at least July, I think.

HighlyRadioactive

Microscript!!!

Jolf!!!

Raghu Ranganathan

Golf but in jeans

Third-party 'Chef'

@RaghuRanganathan Now I really wished I just posted that analysis link. I want to delete all of my messages!

my pronoun is monicareinstate

my secret secret to outgolfing everyone, a huge golfing language list

Raghu Ranganathan

I think I found my fave

Shakespeare programming language

Third-party 'Chef'

2:37 PM

@mypronounismonicareinstate (With a lot of extremely golfy newly made golfing languages missing, obviously)

my pronoun is monicareinstate

@Third-party'Chef' Could you name a few? :)

Third-party 'Chef'

@mypronounismonicareinstate I know Jstx, Convex, RProgN, ... I give up.

my pronoun is monicareinstate

Convex's last commit is 2 years ago, and it's on LICENSE... The second last commit was made on 14 Aug 2016.

Third-party 'Chef'

(Despite that, it still goes pretty high in isaacg's analysis...)

Raghu Ranganathan

Well, do golfing languages require that much maintenance?

my pronoun is monicareinstate

2:44 PM

I think that analysis is meaningless because if a language is too hard to create non-trivial programs with, it ranks very high (because it almost always wins because all programs are just a few built-ins) (note: I do not know Convex)

Adám

@mypronounismonicareinstate Also, it is missing APL, which occasionally wins on very array-oriented or speciality tasks for which it comes with library functions.

caird coinheringaahing

@RaghuRanganathan The good ones, yes

Third-party 'Chef'

@Adám You said that APL isn't a golfing language. Now you are expecting APL to appear in a golfing language list...

Raghu Ranganathan

interesting

caird coinheringaahing

There are always new builtins to be added, or bugs to be fixed

4

Adám

2:48 PM

@Third-party'Chef' No, I'm saying that you're not guaranteed to outgolf everyone if you don't resort to APL when needed.

4

HighlyRadioactive

> J and APL are not golfing languages and they are very easy to learn.

Adám

@HighlyRadioactive Right, so @mypronounismonicareinstate's "secret" is flawed.

HighlyRadioactive

@Third-party'Chef' I can name another: W.

Oh, and Samau.

Rosie F

@RaghuRanganathan Seems to me that golfing languages need a lot of maintenance in the battle between challengers to issue challenges for which golfing languages lack built-in functions, and golfing language maintainers to build in functions to solve challenges.

Raghu Ranganathan

3:09 PM

well doesn't it sorta detract from figuring a solution out instead of using a builtin

or is simplification just the point

cause otherwise the challenging aspect of it is heavily minimized

caird coinheringaahing

3:23 PM

@RaghuRanganathan Not many languages have a builtin for every challenge, so all but the most basic challenges still involve having to come up with an algorithm, then making that as short as possible

Its just that golfing languages allow you to create a much shorter algorithm, and therefore program

For example, if part of the challenge is to calculate det(M) of a matrix M, most golfing languages will just let you use a det builtin, rather than having to implement one yourself

Adám

@cairdcoinheringaahing So fun when a language doesn't have a built-in, but the code to implement the functionality is shorter than other languages' name for the built-in. E.g. det() takes 5 chars but SAX implements it with -.×

caird coinheringaahing

@Adám That's why I just make all my builtins one character long :P

Pah to multibyte characters counting as "more than 1" :P

Adám

Sure, but then you can't really have more than 256.

caird coinheringaahing

I actually have a language in dev that has around 4000 commands available in ~32 different command characters :P

It just happens to be wildly inconvenient to use

Raghu Ranganathan

I have been readin esolangs for an hour now and 256 looks cool

can't go wrong with 4000 commands though

caird coinheringaahing

3:36 PM

You can. My imagination isn't good enough to come up with 4000 unique commands

Raghu Ranganathan

witha good enough search function anything is possible

are there any integral guides where I can peek at the atoms

Adám

@cairdcoinheringaahing Isn't that just about how many built-ins Wolfram Language has?

caird coinheringaahing

@Adám Ooh, I should add a "recognise goat" builtin :P

Raghu Ranganathan

how should that work?

Adám

300

A: Upgoat or Downgoat?

Mathematica, 100%, 141 bytes f@x_:=Count[1>0]@Table[ImageInstanceQ[x,"caprine animal",RecognitionThreshold->i/100],{i,0,50}];If[f@#>f@ImageReflect@#,"Up","Down"]<>"goat"& Well, this feels more than a little like cheating. It's also incredibly slow as well as being very silly. Function f sees rou...

Mathematica has a builtin for determining goats. I don't know how to feel about that. — Robert Fraser Feb 10 '16 at 15:21

@cairdcoinheringaahing Don't forget a built-in for metro stations as a function of the continent. Mathematica is for some reason missing that one.

Raghu Ranganathan

3:48 PM

wow

that's beautiful

Adám

Speaking of down-goats, here are all the European metro stations in a hundred bytes of APL: Try it online!

Raghu Ranganathan

Wow

thats some mad compression

Adám

@RaghuRanganathan It isn't compression, the necessary data comes built-in. The code is just for converting it to the desired format.

caird coinheringaahing

@Adám Idk, if I'm expanding out that much, I might need 33 command characters

:P

Raghu Ranganathan

4:12 PM

oh

makes sense

its like err gzipping

Hey

On contests like these: codegolf.stackexchange.com/questions/64140/…

theres a snippet to show a leaderboard

but it just does't come up

it is a problem on my side?

Adám

4:52 PM

@RaghuRanganathan Seems to work for me on FFQ/W

Raghu Ranganathan

yeah I guess it was supposed to take a while

New Main Posts

6:50 PM

0

Q: Von Neumann Ordinals

Von Neumann ordinals define the nonnegative integers using set notation. Zero is said to be equal to the empty set, \$\{\}\$, and a given nonnegative integer is equal to the set of all nonnegative integers less than it. For instance: \$2=\{0,1\}\$ \$1=\{0\}=\{\{\}\}\$ By substituting the values o...

code-golf integer set-theory

New Main Posts

7:40 PM

0

Q: Thin Paper Folding

Thin Paper Folding This is a "lighter" version of the challenge Paper Folding for the win. This challenge is being posted as a different challenge with many modifications in order to try and get wider range of interesting answers. For anyone who is answering the first challenge, I marked the cha...

code-golf matrix

Lyxal

9:09 PM

@RaghuRanganathan someone's done their research

Ada

Huh, so you're the "replaces chuck norris"?

Lyxal

@Ada apparently so

Ada

That, and the obvious reference to your profile picture.

Lyxal

Fwiw, I was asleep while that conversation happened

Hence my lack of participation

But I appreciate it nonetheless

Ada

I can tell, so you're the one who created Keg?

Lyxal

9:18 PM

@Ada yep, guilty as charged

Ada

I still need to take a look at that :)

Lyxal

;P

Ada

So is "one does not simply ... outgolf Lyxal" a meme yet?

Lyxal

@Ada well, I don't think it will be.

I get outgolfed quite frequently

Ada

Ah

Lyxal

9:27 PM

Heh

Still, thanks for the interest

Anyhow, I hate to leave, but I'm going to have to go do a 3 hour test now

caird coinheringaahing

@Ada It took Dennis years of golfing prowess to get that honour. All respect to Lyxal, but they have a looong way to go :P

5

Ada

I know ;)

caird coinheringaahing

Maybe not the best room but: does anyone know a good place to find integration problems? I need to test my calculus engine. I'm working through this, but it doesn't have too many

Alternatively, if you guys want to throw any my way, I won't object

Ada

You can always try integral of e to the x first.

caird coinheringaahing

@Ada I've done some basic tests, but I'm looking for more complex problems

Ada

9:37 PM

Ah

Lyxal

9:56 PM

@cairdcoinheringaahing I agree

@cairdcoinheringaahing reverse chain rule is always a fun one

Ada

I've just noticed those two already shared a meme.

caird coinheringaahing

@Lyxal Oh yeah, that one took me ~4 hours and I'm still not sure it works

Although, it failed on (3x+5)⋅cos(x÷4), which isn't a good sign

Lyxal

@cairdcoinheringaahing does it follow a method similar to finding an obvious primitive and then multiplying by the factor that said primitive differs from the integral?

caird coinheringaahing

@Lyxal Maybe, but if so, not in those words :P

I run it through a parser, which I then use to break down depending on what function/operation is "first"

Given that u-sub is almost always f'(g(x))g'(x), it checks for multiplication, then tries to reverse engineer the f'(g(x))g'(x)

Lyxal

E.g. If the problem is \int (3x+3)^2, you might let u = (3x+3)^3 (because clearly that's going to be a part of the answer). Then find u' (6(3x+3)^2). Then the problem becomes \int \frac{1}{6}u' dx = 1/6 * u

@cairdcoinheringaahing that sounds like what I described

But more succinct ;P

caird coinheringaahing

10:10 PM

@Lyxal For mine, it would match the pattern (ax+b)*n (* is power) and integrate that

It's stuff like xe*(x*2) where u-sub is used

New Sandboxed Posts

11:40 PM

0

A: Sandbox for Proposed Challenges

Stroke Count of a Chinese Numeral codegolf Task Given an integer \$n\in\left[0,10^{12}\right)\$ in any convenient format, compute the number of strokes needed to write that number in (simplified) Chinese. Background Chinese numbers are expressed with a system of digits and places, just like in En...

New Main Posts

11:52 PM

0

Q: Domino Recurrence Generator

Challenge We once had a challenge to count domino tilings of m by n grid, and we all know that, for any fixed number of rows, the number of domino tilings by columns forms a linear recurrence. Then why not have a challenge to compute the linear recurrence?! Let's define \$D_m(n)\$ as the number o...

code-golf combinatorics grid tiling dominoes

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