The Nineteenth Byte

des54321

00:01

@RadvylfPrograms the other question is of course having enough storage space for that much data, 100 TB worth of HDDs would probably set you back a grand or two

Seggan

i got a $30 drive that keeps 2 TB

lyxal

TB stands for Terrible Bytes and GB stands for Good Bytes change my mind

des54321

seems like theres some 16 TB hdds out there for about $250, could get 6 or 7 of those for a bit over $1500, and download all of wikipedia

Zion mycelia adamancy

I find it very disappointing that the shortest (non-builtin) answer to the Jelly code page question is mostly just string literals, as they can't be compressed, and any method of code point manipulation is longer than the literal string :/

emanresu A

I've got 219 (currently) in Vyxal

Sandbox Posts

00:14

0

A: Sandbox for Proposed Challenges

Interleavable programs (WIP) code-challenge Your task in this challenge is to create programs that can be interleaved. Submissions will be in the form of collections of programs. The score for each collection is 2 raised to the power of the number of programs in that collection, and your total sc...

user

That was fast

@lyxal Hello

emanresu A

I have this neat approach of replacing any byte followed by a 0x01-0x31 byte with that byte, + that byte added to the second byte's value

user

There, just by reading that, the chemistry of your brain got changed :P

lyxal

Fair enough

user

What's a tag for challenges where you do stuff to the source code?

Aiden Chow

00:20

uh maybe source-layout ?

user

Ah thanks

Aiden Chow

theres also restricted-source, honestly not too sure what the difference between the two are

Bubbler

That task is certainly not restricted source

user

I think restricted source is more "you can't do X"

des54321

IIRC theres a currently active meta post about the difference between source-layout and restricted-source, but I think that is a source-layout question

Aiden Chow

00:27

oh rly? i dont check meta that often

des54321

neither do i, but i saw it in that active meta posts sidebar and clicked on it

here it is: codegolf.meta.stackexchange.com/questions/24901/…

ais523

I came here to link to that meta post

(I read TNB much more often than I join it)

@Seggan I'm experimenting with Google Ngrams as a source – i.e. every word that's captured there

although I've been working on a regex to remove some of the obvious OCR errors from it, as people probably aren't going to be using those in challenges

@RadvylfPrograms I'm working on a golflang that does that – it actually helps a huge amount because you can make every command do two unrelated or semi-related things, one in the value returned and one in the truthiness returned

Radvylf Programs

Oh wow, funny that multiple people here have all had that same idea

ais523

@user I don't remember any duplicates for that, but it's kind-of trivial in A Pear Tree – it would stop scaling eventually because CRC-32 is only 32 bits long, but it shouldn't be too difficult to get up to tens of thousands of combinations that work (although it would be a huge pain to verify)

Radvylf Programs

@des54321 You can get quality refurbished drives for about $10/TB, probably, so that's pretty accurate

ais523

00:35

@RadvylfPrograms as an example, "numerical equals" and "bitwise or" are the same builtin – the bitwise-or returns truthy values if the numbers equal each other, or falsey values if they don't

it's basically a form of overloading, but based on what the outputs require rather than on what types the inputs are

user

@ais523 Aww, how would you do it?

ais523

@user lots and lots of checksums

Zion mycelia adamancy

@emanresuA 170 in Jelly

ais523

interleaving two programs will destroy the checksums of the originals, so, e.g., if you want A, B, and A interleave B to all do specific things, you write one program as A, one as B, and the third program, you split across A and B after a comment marker so that it's reconstructed when interleaved

emanresu A

@Zionmyceliaadamancy How? Jelly SBCS or UTF-8?

ais523

00:39

and the A Pear Tree interpreter will find the correct starting point because only one of the programs will checksum correctly

after a while you start getting checksum collisions, but can scale to fairly large numbers of programs before reaching that point

Zion mycelia adamancy

@emanresuA All the characters are in Jelly's code page, so I can just include them as raw characters in strings :P

user

I can't think of any way to defend against that

emanresu A

@Zionmyceliaadamancy ಠ_ಠ

ais523

@Zionmyceliaadamancy Jelly has no escape syntax, so you can't store string delimiters in strings (however, you can write them as single characters and concatenate)

Zion mycelia adamancy

The only golfs are using ØṖ for printable ascii and ⁵Ż+⁽ø9Ọ for the superscript characters from 4 after

@ais523 Yeah, I used ⁾«»⁾‘’⁾“” and took advantage of unparseable nilad outputting

ais523

00:41

@Zionmyceliaadamancy I remembered the unparseable nilad outputting but forgot about ⁾

Zion mycelia adamancy

It's a shame that the UTF-8 code points of the code page are so messed up, it feels like such a boring answer :/

ais523

I just had a really silly idea: radiation hardened pristine programming – if you delete any single character the program still works, if you delete any substring of length 2 or more the program errors

Bubbler

oh wow, that's crazy

ais523

I think that might also be cheesable with A Pear Tree? but at least it's more difficult than usual

ah yes, you have two identical halves – if you delete a substring that crosses both you get a partridge, otherwise one of them is intact and is able to check how many characters were deleted from the other

user

I think these two challenges would benefit from you deleting A Pear Tree :P

ais523

00:45

it's weird how one language can invalidate an entire genre of challenges

Radvylf Programs

Well, not really invalidate, just be trivial in that language. If it's still fun in every other language it doesn't really matter (lenguage for example also does this occasionally).

ais523

especially when it was created as a one-off joke

I don't think pristine programming is possible in Lenguage

Radvylf Programs

I meant more like lenguage has broken quite a few challenges before, but people usually just kinda ignore it since one language doesn't affect the others

ais523

radiation-hardening in Lenguage is sometimes interesting if the intact and irradiated programs are meant to do something different, thoguh

fwiw, every golfing language should have a special case for if the program consists entirely of NUL characters

that's easy to add and won't interfere with any legitimate golfs, and yet it can beat Lenguage at its own game because the language you decode it into is a lot golfier than brainfuck

user

Wouldn't it take up an extra character on the codepage?

Zion mycelia adamancy

00:49

Not necessarily

ais523

well, whatever codepage character is encoded by an 0x00 byte

Zion mycelia adamancy

An all NUL program in Jelly isn't syntaxically valid, so you can encode a number of set programs that way

Bubbler

You can almost always find the least used byte (or one that is syntactically incorrect if it is the only char used in the entire program)

user

I guess if your 0x00 byte represents a space or something it'd work

ais523

0x00 in Jelly is ¡ which is a quick

and thus can't appear at the start of a program anyway

Zion mycelia adamancy

00:50

In fact, almost every quick in Jelly cannot make up a valid program by itself, so there are ~20 different pre-encoded programs you can have, for each length of a program, just by repeating the same character

Bubbler

Too bad Jelly wastes ~20/256 of the program space from the first char alone :P

ais523

Brachylog would almost certainly benefit from "putting a metapredicate [the equivalent of a quick] at the wrong end of the program affects the whole program" – I haven't needed that nearly as often in Jelly though

this may be a difference between declarative and imperative programming, or it may be a consequence of Jelly autovectorising

Zion mycelia adamancy

@Bubbler I think there are ~40 characters that cannot appear at the start of a Jelly program :P

ais523

some quicks are valid there

although ß, despite being valid, is inherently useless

oddly, © is invalid at the start of a program despite being meaningful

Zion mycelia adamancy

@ais523 Not necessarily; if you have a recursive function, with a ß...? structure

ais523

00:55

ah right, you could use µ or something to put the ß inside the scope of the ?

I lost count slightly, but there are around 38 quicks that are unusable at the start of a Jelly program (this count might or might not include Ð, the introducer character for two-byte quicks)

Unrelated String

@ais523 it has always seemed a bit odd that © specifically modifies a link to copy its result to the register

ais523

@UnrelatedString the situation where it makes a difference is where you're running a monad in a dyad argument (e.g. in a monadic link, something like +U©) – oddly, though, this is a feature that would probably be more useful for things other than ©

still, the fact that +U© and +©U are both legal and mean different things is probably helpful – if © were a normal monad, +© would never be useful

Unrelated String

that is a very good point

ais523

so the only fix that's really needed is to allow © (meaning ¹©) at the start of a link

fwiw, ¹ in Jelly is probably also a mistake – in most contexts where you really need a no-op you can find some other way to implement it

emanresu A

01:13

Well, got it working:

0

A: Compress Jelly's code page

Vyxal D, 211 bytes (UTF-8) `[^-][-]+`kA`CFGJPQX JKQUV`⌈vF:N+`ci`¨£ovfvI`̣̇`f+ƒYf∑`¡©€Æ ŒÞ ıȷñ %¶° ²%ƁⱮƝȤɓƈɗƒɠƙɱƥʠɼƭʋȥΠ«‘`kPs11ʁ8308+C"Ṡ%λC¦C∑;øṙ Try it Online! Warning: This contains a ton of unprintables. One technique this answer uses is to replace bytes preceding multiple 0x01 to 0x1F w...

Unrelated String

for aesthetic reasons it's my go-to for breaking chains up but in those cases you can always just use a nilad, except maybe making a dyadic leading (2,2,2) into a (2,2),(2)

ais523

my default for breaking changes is µ but I often have to go and change it to something else :-D

my second default is ³ which is also probably a bad idea

Unrelated String

¹Ƈ being useful is less evidence that ¹ is useful and more evidence that we need a single atom that does that

Radvylf Programs

@ais523 Wait so...if it decodes to another program of null bytes, you could nest it :p

ais523

@RadvylfPrograms that probably isn't ever useful :-D

Radvylf Programs

01:15

(Alternatively, you could take the boring route and make that run normally, just in case you somehow need an entire program filled with that operator)

ais523

ir'd have to be shorter to use a string literal + eval for that, surely? (unless you don't have an eval)

or to add a no-op-in-context in to break up the operator spam

Radvylf Programs

Oh, true

Hello, World!

0

A: "Hello, World!"

Objective-Java*#++--Script.NETnotation.sh, 18 bytes. Hello,\ World!.exe Try it online! How it works: Hello,\ World! # Pushes "Hello, World" to the stack. .exe # Print the top item on the stack. This is a stack-based esolang that I created that uses file extensions for commands.

ais523

@Hello,World! what is that language name :-D

aketon

01:30

Oh hey it's my language

Yes it's beautiful I know

Radvylf Programs

Welcome to TNB!

Unrelated String

^

des54321

beautiful is not the word i would use for that name, but welcome to TNB!

emanresu A

^

aketon

@des54321 :pensive:

tybocopperkettle

01:33

@aketon you should finish it

aketon

Yeah I've barely done anything on it

emanresu A

Any feedbacks?

Radvylf Programs

Looks good

The I/O is a little looser than I'd expect but it shouldn't cause any issues

ais523

I think the example shouldn't start at 1

Radvylf Programs

^

ais523

01:40

best for the first example people see to be a typical case rather than an edge case

New Posts

0

Q: Fix my FizzBuzz

FizzBuzz is where a range of positive integers is taken, and numbers divisible by 3 are replaced with "Fizz", divisible by 5 with "Buzz" and divisible by 15 with "FizzBuzz". I've got some FizzBuzz output here. Unfortunately, it's been shuffled: 4 Fizz 1 Buzz 2 A bit of logic shows us that this i...

emanresu A

@ais523 Oops, quickly edited

ais523

actually the I/O is exploitable, but I think it might be a standard loophole

e.g. V€Ṣ in Jelly solves the problem in three bytes, with sufficiently complex strings for the fizz and the buzz

emanresu A

Yes - one moment

ais523

I thought it was unexploitable because there might be no fizzes or buzzes, but that version of the problem is much easier than the version which has them

emanresu A

01:43

JavaScript, 4 bytes: eval - Input a program that generates a left-facing plane for left, and a program that generates a right-facing plane for right. — darrylyeo Aug 30, 2017 at 4:17

ais523

I know there were some thoughts about making that a standard loophole, but I can't remember whether we did or not

Radvylf Programs

It falls under taking additional data as input, right?

emanresu A

Probably

34

A: Loopholes that are forbidden by default

When consistent and distinct values are asked as input, you cannot input complete or partial functions When I create a challenge and ask for a boolean or two 'consistent and distinct values' I mean it in the sense of a truthy and falsey value. Usually I leave the choice to the ones doing the chal...

Found it

ais523

does that have a high enough upvote/downvote ratio to be valid? I don't have the rep to check

Radvylf Programs

+38/-4

ais523

01:45

OK, so yes, the loophole saves us

emanresu A

02:28

Aug 17, 2021 at 16:59, by Neil

@Adám One to hold the giraffe and the other to fill the bathtub with brightly colored machine tools.

des54321

i beg your pardon?

emanresu A

Pardon granted. You may now commandeer people's dogs.

lyxal

02:49

@emanresuA is it guaranteed that the input to the fizzbuzz challenge will be a subset of standard 1 to 100 fizzbuzz or will it be to any positive integer?

emanresu A

Any positive integ

lyxal

dang

Steffan

I wonder how that hinders

emanresu A

Are you... generating all valid fizzbuzz subsequences?

That is a terrible idea and I love it

Steffan

Yeah that sounds terrible/great

lyxal

02:50

@Steffan Þ∞ƛ₍₃₅kF½*∑∴ instead of ₁ƛ₍₃₅kF½*∑∴ for the fizzbuzz subsequences

it's short enough in vyxal that it's actually viable

Steffan

*now tries to beat lyxal in posting the answer

lyxal

@Steffan looks like you lost

Steffan

Woops sort bug

ah set operators, I was trying s?s⁼ lol

I would've had it if it wasn't for that bug

emanresu A

@lyxal I have 15 with some looser I/O

lyxal

haha I got a downvote lol

Steffan

02:56

bruh weird

lyxal

@emanresuA what kind of IO?

Steffan

lol

emanresu A

@lyxal You can use any values that don't appear in the sequence as Fizz/Buzz/FizzBuzz

lyxal

That sounds like it's using a completely different algorithm then

emanresu A

Nah, just a different I/O format

Also, some smarter answer-finding

lyxal

02:58

really?

it fits into the standard FB?

emanresu A

Different I/O format and doing different things where theere would be fizzes/buzzes to get that format

lyxal

I'mm'a need more of a hint than that

you might be smart enough to figure out how to bend IO but I sure ain't

emanresu A

Mess around with other things you can do with the list [div by 3, div by 5]

There are many possibilities

lyxal

Maybe later

I'm not really feeling up to it at the moment lol

Steffan

Can we use [0] for Fizz, [1] for Buzz, and [0, 1] for FizzBuzz?

If so, 16

lyxal

03:08

17, actually

Steffan

17 I mean

emanresu A

Nice! 14 with better combinations

lyxal

@emanresuA *15

emanresu A

Why?

Oh :P

lyxal

ṖÞ∞ƛ₍₃₅T∨;ÞS$↔h

20 mins ago, by Steffan

I wonder how that hinders

Well now you know

emanresu A

03:10

@lyxal I'm surprised this is so fast.

It's enumerating 900 sublists to get there, yet terminates in under two seconds

PyGamer0

03:48

@Adám done

New Posts

05:18

0

Q: Nest some addition

Lambda calculus is a system of computation based on single-argument functions; everything in it is such a function. Due to this functional nature, juxtaposition is commonly used to denote function application, grouped from left to right. For example, \$(f g) h=f g h\$ denotes what would conventio...

code-golf

mathcat

05:58

Final feedback?

I don't think it'll be very fun tho

pxeger

Feedback?

mathcat

@pxeger lol that gave me an idea for another challenge

Unrelated String

> Should I allow output as just the start and end points of the range? I've omitted this because I think it's unlikely that people will want to use it, so it allows me to simplify the rules. But is it necessary?

i feel like there's a good chance it could be useful, but since converting is pretty trivial i feel like requiring the full range could be appropriate as a little nudge toward the intended logic/overall feel

mathcat

is 66 an ambiguity?

Unrelated String

i would imagine 66 wouldn't be legal

emanresu A

06:27

^^^

pxeger

06:38

Correct, 66 would not be a valid input

emanresu A

CMC: Given a function that increments a number in some format, implement tetration.

hyper-neutrino

06:57

can we assume positive inputs or do we have to handle 0

Unrelated String

07:23

am i missing something or is that actually impossible without more ways to probe the number format

Bubbler

07:34

I think you need "repeat n times" function too

Unrelated String

^

or a guarantee that numbers can be compared for equality, and zero

Adám

@emanresuA Would this be valid?

      Inc←1∘+
      Plus←{(Inc⍣⍺)⍵}
      Times←{⍵(Plus⍣⍺)0}
      Power←{⍺(Times⍣⍵)1}
      Hyper←{⍺(Power⍣⍵)1}
      2 Hyper 3
16
      4 Hyper 2
256

emanresu A

If you wrap it in a function that takes Inc and returns Hyper, then yes.

New Posts

07:50

0

Q: Help me design an unfair laundry machine

There's a payment machine for laundry in my building which does a few frustrating things. The ones relevant to this challenge are: It doesn't make change. So if you pay over the amount then you are not getting that over-payment back. The second is that it doesn't accept coins smaller than 20c. ...

code-golf number-theory

Adám

@emanresuA Initial solution is 38 in APL, but I'm sure it can be shortened a lot:

      Hyper←{⍺ ⍺⍺{⍺ ⍺⍺{⍺ ⍺⍺{⍺⍺⍣⍺⊢⍵}⍣⍵⊢0}⍣⍵⊢1}⍣⍵⊢1}
      2 Inc Hyper 3
16
      4 Inc Hyper 2
256

emanresu A

Implementing hyperoperations might help

Adám

{⍺{⍺{⎕⍣⍺⍣⍵⊢0}⍣⍵⊢1}⍣⍵⊢1} at 23 works (prompts for increment function).

emanresu A

Cool!

emanresu A

09:26

CMQ: What's the time complexity of integer partitions?

pxeger

depends on the algorithm ;)

emanresu A

That algorithm from SO that everyone uses

Nvm can't find it

Vyxal's alg, which is presumably optimal

pxeger

@emanresuA stackoverflow.com/a/44209393?

emanresu A

Oh, yeah, that :P

PyGamer0

10:35

alright we had computer labs today

and i decided to check the RAM of my computer

"2 GB"

lyxal

10:46

Mine has at least 3

emanresu A

Mine has 15 energetic hamsters.

awagga

11:25

@Adám {⍺{⎕⍣⍺⍣⍵⊢0}⍣⍵⍣⍵⊢1}, You could express this differently with f/⊂⍵⍴⍬ or with hypperators, but I doubt it'd be shorter.

New Posts

0

Q: Decipher a squashed sequence

Given a string containing a sequence of ascending consecutive positive integers, but with no separators (such as 7891011), output a list of the separated integers. For that example, the output should be [7, 8, 9, 10, 11]. To disambiguate the possible outputs, we add the restriction that the outpu...

code-golf string number parsing

awagga

I meant f/0,⊂(⍺×⍵)⍴⍬ or something

mathcat

11:58

Does my microwave count as a programming language?

lyxal

can it run Doom?

mathcat

well no but

It can output something

I can get a 0-byte answer

lyxal

Thanks SE

emanresu A

Same ;)

Probably reversed downvotes

lyxal

thanks for rubbing in the fact that I missed out on 8 rep

@emanresuA it's a repcap

mathcat

12:02

@mathcat I'm gonna post it lol

emanresu A

I know, I has repcapped

lyxal

I got downvoted ealier but lost 8 rep of an upvote

this is so sad

emanresu A

Yesterday I gave pxeger a hug (100) but still hit the cap at +200 worth of upvote

mathcat

@mathcat dang my oven doesn't let me do that type of stuff

emanresu A

o/

Unrelated String

12:08

o/

mathcat

\o

I wish I had a microwave :/

lyxal

12:29

@mathcat ᵒᐟ

now you do

mathcat

is that supposed to be your head or a microwave

lyxal

a micro wave

mathcat

strange

lyxal

the second character doesn't show?

mathcat

no it renders correctly

dumb autocorrect

now, what should I do?

okay I'll try to program it

Maybe I forgot what a microwave looks like but that does not look like a microwave

wait a second

I got it!

Unrelated String

12:37

heh

mathcat

yes!

0 bytes gooo

thejonymyster

im excited to see whatever this is

lyxal

y'all ever just speedrun a game to get a screenshot for a challenge you want to sandbox?

because I am

thejonymyster

that's exciting i hope its not a huuuuuge spoiler :P

lyxal

only minor :p

thejonymyster

12:42

(^_^)b

lyxal

the scene I want to screenshot doesn't come up for like another 10-20 mins though lol

Unrelated String

nice

what game by the way

next you'll say, "deltarune"!

5

lyxal

nut dealer

also known as undertale 2

thejonymyster

undertale 2 is a different game

PyGamer0

TIL deltarune is a permutation of undertale

thejonymyster

12:45

nice

@unrelated is a permutation of undertale as well :P

Unrelated String

holy shit i never noticed that

mathcat

ooh didn't notice that

lyxal

@thejonymyster must be a lightner then :p

thejonymyster

new username: Undertale String

mathcat

hyper-neutrino is a permutation of anime

thejonymyster

12:48

Had an idea for a code bowling challenge, I doubt it's immune to all of the standard attacks but i'm curious which ones it is most susceptible to :?

something along the lines of "there are some challenges / tasks, and exactly one subsequence of your program's bytes can solve each"

was thinking of adding a "no-overlap" rule to prevent solutions that are just decode(encrypted program)

so they can't use the same decode, but if you add more than one, then multiple subsequences solve the same challenge/task

i wasn't sure if i should have there be like, a set number of tasks, or having some task which could be extended to arbitrarily many

like

- solve these specifically curated tasks
vs
- each program should output a number from 1 to 100
vs
- each program should output a number

lyxal

woo yeah got my screenshot

challenge writing time

thejonymyster

yeah, woo, yeah, woo

thank you for your dedication. screenshots are good

mathcat

Screen recordings are better.

lyxal

I put one of those in my other sandboxed challenge

mathcat

idk if my answer is allowed lol

lyxal

13:01

no

because it doesn't display 1:68, 1:67, etc

if it did there could be an argument to say it's allowable

but it doesn't hence it doesn't even answer the question lol

mathcat

uff I forgot about that

I don't like android anymore

but I'll not give up.

thejonymyster

yay!

mathcat

hmm

Deadcode

13:16

Can people please give my unary ECMAScript Regex answer to "Numbers with Rotational Symmetry" a look, please? And if you don't consider it to be worth an upvote, please tell me why? It's an interesting problem for unary ECMAScript, I've put days of work into it, and there's probably nothing left to golf down in it. I don't understand why it has only got 1 upvote, and this is really disturbing me.

It's bad enough that nobody else is writing answers in this language (Grimmy and H.PWiz were fantastic at it for a short time, but then they stopped) but if such answers won't even get any attention at CGCC anymore even when given a full explanation (when they used to get plenty of attention), well, I don't know what to do.

pxeger

@Deadcode I think the problem is just that many answers don't get seen, and quickly get buried

I try not to get too hung up about it, and just enjoy writing the answer for its own sake.

If it doesn't get as many upvotes as I think it deserves, it's not because it's a bad answer; it's only the readers' loss for not seeing it

Deadcode

@pxeger But I've been working on it for days, which means I keep editing it, which means it keeps going back to the top of the index. So I don't understand how it could have not been seen.

pxeger

In the active questions list, when a new answer is posted, people only see the question, not the answer

so, if it's not a recent (or "hot") question, then whether it's a good answer or not doesn't really affect how people might see it

The average score on a late answer to an old question is much, much lower than the average score on an answer to a new question, especially a FGITW answer

Deadcode

So, posting it here has gotten it some attention, thanks! :-) but I feel kind of dirty bringing attention to my answers by posting them here. Should I not feel that way? Is it okay to post something here if I feel it hasn't got enough attention?

pxeger

I think it's ok as long as it's not like "gib upvotes plz" and there's a good reason for it

Fatalize

13:26

@Deadcode I’ve spent days on some answers to get a few upvotes, and my most upvoted answer (500+) is a 0 byte answer…

Unrelated String

😔

PyGamer0

in flax, yesterday, by PyGamer0

Feeback for elements?

^ now with single byte dyads

Fatalize

@Deadcode …I just checked your profile… you use regexes all the time for fun? Why inflict this to yourself?

pxeger

@Deadcode Can x$|x{8}$ be shortened to xx{7}?$?

Ok, looks like it can't. New question: Why can't x$|x{8}$ be shortened to xx{7}?$?

Deadcode

@Fatalize LOL. Well I just find it fascinating. As for unary regex I even think of it as a topic of research with many unanswered questions.

@pxeger xx{7}? is only valid in Ruby. In everything else it has to be x(x{7})?.

Sandbox Posts

13:33

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A: Sandbox for Proposed Challenges

Solve a Card Suit Puzzle Warning: Contains minor Deltarune Chapter 1 Spoilers Within the Forest section of the first chapter of Deltarune, there are a few puzzles that consist of entering playing-card suits in a certain order to move to the next section. Below is an example of such a puzzle: The...

Fatalize

@Deadcode Next you’re gonna tell me you have a Ph.D. about regexes

Deadcode

@Fatalize Haha, probably would, if it existed!

mousetail

@pxeger It's because the ? marks the repeater as non-greedy but doesn't work like a normal ?

Fatalize

Well I’m sure there’s some research opportunities on that

pxeger

@mousetail Oh, I didn't know that worked on {} quantifiers as well

mousetail

13:35

For the same reason you can't use a ? after a + or *

Fatalize

Definitely not a topic I would have chosen personally

mousetail

@pxeger It's kinda useless if you specify a single value instead of a range but it works for consistency

Fun fact: in python []{}()[] is a valid regex that matches any single bracket of any type

Deadcode

@mousetail Right. ? after an non-quantified expression is a quantifier that means {0,1}, but after a quantifier, it changes the quantifier to be lazy/non-greedy. Even ? can be followed by ? making it a non-greedy.

thejonymyster

speaking of regex, do yall think this regenerate would be a valid answer to print all integers?

i think not, but i just want to be sure :P

user

@Deadcode Couldn't someone have a PhD involving grammars?

pxeger

13:38

@thejonymyster I don't think so

user

Sounds like it could totally be a thing

pxeger

although I reckon you could probably modify it somehow to actually work

thejonymyster

i was trying to think about how but i dont really know how this lang works and the readme isnt super helpful :P

Sandbox Posts

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A: Sandbox for Proposed Challenges

Squash it ... again! If you put the positive integers together without spaces and read two adjacent numbers at the same time, you get: (A136414) 12, 23, 34, 45, 56, 67, 78, 89, 91, 10, 1, 11, ... However, if you squash that sequence again, you get: 12, 22, 23, 33, 34, 44, 45, 55, 56, 66, 67, 77,...

mathcat

^ I'm very uncertain about it

thejonymyster

13:42

12, (22 repeating)

mathcat

what

thejonymyster

thats the sequence after infinitely many iterations

12, and then infinitely many 22s

Deadcode

@thejonymyster The problem is that it's scanning the possibilities from left to right, so it never progresses to a first digit other than 1... if the language allowed doing that from right to left, something like ^0$|^-?.*$(?<=^-?[1-9][0-9]*), maybe that could work...

mathcat

@thejonymyster no you'd have to print it after n iterations

thejonymyster

ohhh i misread lolol

mathcat

13:46

laughing out loud out loud

thejonymyster

i reckon its totally possible, i strongly doubt the sequence is uncomputable :P

@Deadcode yeah i hate that it does a depth first search seemingly :P itd be cool if this lang were designed to actually try to get all outputs lol.........:)

@Deadcode also i dont think regenerate has ^. we need a community remake of regenerate. For the people!

or i guess patch

pull request? idk

Deadcode

@thejonymyster Well, a redesign. It wouldn't be compatible with previously written programs.

thejonymyster

thats the word

thank u lol

btw since you look at regexes all the time; does the tetris effect exist for regex

Deadcode

@thejonymyster Hmmm, oddly enough, it doesn't seem to have done so for me. On the other hand, Worms Armageddon has a strong tetris effect for me. I'm always thinking of backflip-parachuting up people's faces when watching shows.

thejonymyster

nice

Deadcode

14:01

@thejonymyster This is a start: Attempt This Online!

Does all the positive integers

thejonymyster

oh wow :D

graffe

can anyone clever find the highest scoring questions with exactly one answer?

Mayube

does it count if that one answer is split across 6/7 posts?

graffe

@Mayube what do you mean?

Mayube

@graffe Highest voted question on CGSE ever. Only has "1 answer" split across 8 answer posts

mathcat

14:11

lol very clever

graffe

@Mayube :)

mathcat

537

Q: Build a digital clock in Conway's Game of Life

Your task is to build a Game of Life simulation representing a digital clock, which satisfies the following properties: The clock displays the hours and minutes in decimal (e.g. 12:00, 3:59, 7:24) with a different state for each of the 1,440 minutes of the day — either the hours will go from 0 ...

code-challenge cellular-automata game-of-life

graffe

how about where it is not split?

mathcat

^^

Search query

graffe

@mathcat that's great. Can you list the top 5?

mathcat

14:13

^^ lol

ninja'd two times

graffe

@mathcat woohoo! thanks

:)

I know who wrote codegolf.stackexchange.com/questions/47249/… !

Deadcode

14:26

@thejonymyster I did it! Attempt This Online! Should I post it or would you like to?

thejonymyster

its all you :P nice work >:)

Deadcode

Thanks :) and thanks for the idea!

thejonymyster

excited for the post so i can finally learn what ! does as well lol

Deadcode

@thejonymyster Yep, I had to look in the esolang's source code to see what it did

In the main docs it's only listed as a character that needs to be escaped.

pxeger

elif regex[0] == "!":
        # Like alternation, but stop trying other options as soon as
        # we find one that works

Deadcode

14:51

@thejonymyster Print all integers - is this a sufficient explanation?

thejonymyster

will read once im on my break :P

Zion mycelia adamancy

@graffe Interestingly, #5 (this), actually has 16 answers, but all but one are deleted as invalid :P

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