Welcome to the 7th Biweekly Mini Golf. During this event, we'll post some CMCs (Chat Mini Challenges) for you all to solve. A new one will be added every 5 to 10 minutes. Feel free to keep suggesting drafts during the event. If you have any questions, don't be afraid to ask. Good luck!

@Dudecoinheringaahing That's not "mini".

Oops

Isn't it just "powerset, filter palindromes"?

^

@Dudecoinheringaahing No, they have to be non-consecutive substrings too.

Powerset includes non-consecutive substrings

Yes, but it also includes non-substrings, no?

I don't think so

Try it online! (Jelly, 6 bytes) should work

+1

Brachylog (generator), 3 bytes

⊇.↔

@Dudecoinheringaahing APL, 13: ⌊.5+⊢×≢+∘÷⍣=≢ Try it online!

nice

Using phi? Nice

Yeah, simply [phi×x]

@Dudecoinheringaahing Jelly, 3 bytes (I think)

UZU

feels like it should be more than that but also not

> UZU

maybe that fails for nonsquare

yeah probably

Do we have to handle non-square (@user)?

@Dudecoinheringaahing APL (dzaima or Extended Dyalog), 3: ⌽⍢⍉ Try it online!

@Adám Transpose under reverse?

come to think of it i'm not entirely sure what the main antidiagonal is in a nonsquare matrix lmao

(works on non-square too)

@Dudecoinheringaahing Yes.

Nice :P

@UnrelatedString Starts in top right and goes southwest.

makes sense

so in that case yeah it should be fine for nonsquare because reversing each row maps that to the main non-anti-diagonal

@Dudecoinheringaahing Handling 1 is ಠ_ಠ

@Dudecoinheringaahing yep

Hey, nobody cared to check that it did the right thing. Typo. Shoulda been ⍉⍢⌽ Try it online!

@Dudecoinheringaahing Jelly, 11 bytes ḤRÆḞi¹‘ÆḞ+Ị, which is blegh

wow

yeah handling 1 really kills it

@Dudecoinheringaahing Smash-printing OK?

@Dudecoinheringaahing i almost wondered if using eval for digraphs could save bytes in jelly here but then i remembered it'd need two quotes

@Dudecoinheringaahing Vyxal, 8 bytes: ₍⇧⇩?₍ǐNJ

@Adám Yeah, that's fine

@Dudecoinheringaahing What is input? All-lower?

@Adám Input will be only ascii letters, of either case

@Dudecoinheringaahing So for the titlecase, we have to lower all trailing?

@UnrelatedString I've got 11 bytes just using the atoms themselves, but there needs to be a better way to apply multiple atoms to the same argument

@Adám Uppercase the first element, lowercase everything else

@Dudecoinheringaahing idk, do whatever you want lol

e.g. hecK -> ⟨`HECK`|`heck`|`Heck`|`HECk`⟩

@exedraj Heck yes :P

@Dudecoinheringaahing there really does

@Dudecoinheringaahing Extended Dyalog APL, 10: ⌈@1⌊,⌈,⌊,- Try it online!

Wait, negating a string is swapcase? Huh

Yup.

hey Vyxal does that too! ;)

interesting, I was kind of expecting one of those dyadic selector things but I don't actually know APL builtins

@Dudecoinheringaahing Vyxal J, 7 bytes: ₌ǐN~⇧~⇩

(like the circle for trig stuff)

@UnrelatedString That's in vanilla. This one is with my extensions.

ah

Similarly, I've overloaded floor and ceiling to casing.

@AaronMiller clever

Also, monadic ÷ (normally reciprocal) converts letters to titlecase.

@Adám Floor and ceil sort of make immediate sense, but negate being swapcase made me think for a second

@Dudecoinheringaahing Even floor and ceil don't quite make sense, since casing isn't idempotent.

i'd say negate being swapcase is a bit more intuitive

@Adám They don't make logical sense, but they seem naturally intuitive to me for some reason

in terms of the actual function, even though the floor and ceil symbols are quite suggestive

Yes, negation is actually better, since that isn't idempotent.

Monadic × (sign, for numbers) queries the letter case.

@Adám 0 for lower, 1 for upper; or -1 for lower?

@Dudecoinheringaahing -1 for lower, 0 for title and no-case.

@Dudecoinheringaahing I was about to submit ċⱮQƙ until I realized the output also contains the counts themselves

@Dudecoinheringaahing Extended Dyalog APL, 7: ≢⍤⊢⌸⍮⌸∪ Try it online!

pops in, waves, then hides again in the shadows

@UnrelatedString ƙ seems useful here for once :P

@user That was a very nice one.

@ThomasWard Hey Thomas :P

@Dudecoinheringaahing ...and now I'm wishing it could also accept dyads, and pass the value identifying the group to the right

@Dudecoinheringaahing yo. forgive me for just stopping in and saying hey, i sometimes lurk here ;)

I suppose that ƙ is like APL's key (⌸), but APL's does take a dyad and passes the value identifying the group to the left.

nice

I feel like we've dug up the origin of ƙ at least twice on JHT

@Dudecoinheringaahing Jelly, 10 bytes ṢQɓQż¹ƙµĠẈ How does APL beat Jelly? ಠ_ಠ

but I cannot remember how it ended up as weird as it is

Seems it was taken verbatim from J.

oh yeah

Pretty sure it was, yeah

(Yes, I know about the Jelly builtin :P)

:P

Should be 2 bytes without the builtin tho

@Dudecoinheringaahing APL 5: ⍸⌈/=⊢ Try it online!

@Dudecoinheringaahing ẹṀ?

@UnrelatedString Either that or Ṁẹ, I always forget the argument order of ẹ

Literally reads as ⍸ indices where ⌈/ maximal element = equals ⊢ the argument.

I was thinking of something like JịÐṀ until I remembered ẹ exists

@Adám I'm practicing just reading APL programs (to get a hang of how they work), and that's exactly how I read it :D

niiiice

@Dudecoinheringaahing Two bytes longer but I feel this still needs to be seen

> ŒQÆm

...what

it gets the count being grouped on as the reciprocal of the average of the ŒQ

Generate a unique mask, then calculate the mean? What the what??? :P

such a stunningly jank idea that i simply had to execute it

@Dudecoinheringaahing I take it this means "the Lucas number at the same index in the sequence"

Yes

@Dudecoinheringaahing I have 8 bytes in Jelly

ooh

Outputs 1 for 1

It's crazy that it takes 5 (sometimes 6) bytes to get a Fib number's "index" O.o

Ok, so we've got 2 CMCs left after this one. Should I just post them and let people be free to keep pinging me with responses over the next however long?

I think so. Hour is almost up.

(And I really should go to sleep…)

(/ can be either float or int division, ^ is power. user hasn't responded, but I think it should be ok to assume a, b are ints)

@Dudecoinheringaahing ÷,|⍨,+,-,×,* in APL.

Assuming % is division remainder when a is divided by b.

@Dudecoinheringaahing just a thought but if b is 0 won't that break things :P

@ThomasWard Why?

(just a thought)

@ThomasWard Jelly outputs inf for div by zero, so not always :P

good point

@Adám (not all langs handle div-by-zero in a \way that won't explode)

Besides, I think it's fair to assume b won't equal 0, given that it makes most of the operations either borked or boring

@ThomasWard "proper".

@Dudecoinheringaahing ḋ??₍+-??eJJ in Vyxal

Jelly is almost ascii-only :/

sad

Just needs × for multiplication (my Jelly solution)

@Adám that was an autocomplete problem. typing on my tablet at the moment

oh yeah brachylog can pull it off nicely with a generator ÷|%|+|-|×|^

which really means "div or mod or ..." but we just do all of them

@exedraj ḋ??₍+-??₍e*JJ: [a / b, a % b] + [a + b, a - b] + [a * b, a ** b]

@Dudecoinheringaahing oh yeah, you can actually use ; unlike with the case one because you're working with scalars

Nobody for my palindromic palindrome?

Oh right, yeah, divmod is a thing. 9 bytes in Jelly then

i'm doing it rn

@Dudecoinheringaahing oh yeah lmao

I'd guess 4 in Jelly.

I was thinking 2

Wow.

But it doesn't quite work :/

sad

Oh.

what did you think the 2 was

UƑ

well that's half of it

Sandbox posts last active a week ago: Solve the halting problem for ^/ab*/ba*/[ab]*$ in /// [code-golf] [halting-problem], Train A Single Perceptron

That's a very weird "digraph", with some really interesting behaviours actually :P

I thought this was one of them, but it's not quite

brachylog should be ↔?↔ᵐ? for 5, and the best i can think of for jelly atm is also 5

Wouldn't U€⁼U or U⁼U€ work in Jelly? (I don't know how to call it using TIO.)

UƑaṘƑ

@Adám No, but U€⁼Ṛ would

@Dudecoinheringaahing I'm not so sure about that

Make that U⁼Ṛ

I was also aboutt os ay that lmao

Oh :(

TFW school starts in two days and you have an assignment you were supposed to do over summer

Two days? wth

I think you pretty much have to check the overall palindromeness and palindromeness-of-each separately

@Dudecoinheringaahing Ah, so U is Ṛ€?

And you're also almost done with RTO and it takes precedence over school :p

Jelly, 6 bytes ṭ`ŒḂ€Ạ is a stupid one :P

@Adám Basically, yes

Oh wait this is BMG isn't it, I totally forgot

For 2D arrays.

@UnrelatedString You might want underdot R, otherwise you're just printing it :P

...yeah

But it looks like that works

So U is APL's ⌽ and Ṛ is APL's ⊖

yeah think so

if U isn't exactly ⌽ it's probably meant to be at least analogous

Right, if input was a 2D array, then ⌽≡⊖ would work in APL too.

oh yeah and it wouldn't otherwise because no ragged arrays

Exactly.

And on that note, I'll bid y'all g'nite. Happy golfing!

night

@Adám What U actually does is slightly more complex :P Numbers and chars have a depth of 0 in Jelly. The depth of a list is recursively defined as the maximum depth of it's elements. U finds all elements with a depth of 1 (so lists of numbers and chars) and reverses those

o/ Night

It only really has a distinction when you have lists of lists of lists or deeper

@Dudecoinheringaahing So very much like ⌽ in that it also reverses the leaf rank-1 subarrays.

The real equivalent in APL would be ⌽⍥1 which is reverse depth 1.

@Adám I'd imagine so, yes

@RedwolfPrograms Why does your school start half-way through August?

Well 'cause that's about when summer ends, but they start a little early for some reason

When does it start over there?

Start of september

Then again, we end in the middle of July

We used to start school around then as well, though they've slowly pushed it back

Blame Austin ISD, I think our schedule's just changing to be closer to theirs

They sort of can't push ours back :P Normally, the 2rd Thursday of August is A-level Results day, when all the seniors get the uni entrance exam results. Uni then starts in a month from then. The next Thursday is GCSE results day (exams at the end of sophomore year), and schools can't start until a week after that, which is typically the last week of August/first week of September. And they can't have the first day back be a Friday, so they wait until the next week

Our first day back is a Thursday, for some reason

@Dudecoinheringaahing Vyxal, 5 bytes: R⁼[Ṙ⁼ Returns 1 for a palindrome of palindromes, otherwise it returns 0 or the inputted list.

@Dudecoinheringaahing Can they be in any order?

@AaronMiller Sure, I don't see why not

@Dudecoinheringaahing Vyxal W, 7 bytes: ₌ḋe□₌Π∑

Oh wait I forgot subtraction

just a sec

@RedwolfPrograms well did you find a good way to spend those 104 days of summer vacation?

Did you discover something that doesn't exist?

I know what that's a reference too, but not enough about it to respond with something funny D:

Phineas and Ferb opening theme :P

Yeah :p

I didn't watch that as a kid so I don't know anything to counter-reference with :p

Neither did I lol

Me neither :P

lol

I just know it from the memes :P

The most I've watched is a 1 hour compilation of every doofenshmirtz -inator

This makes me think. We've got quite a few sequences/challenges on the site that come from user ids (Dennis numbers, Calvin numbers, DJMcMego pairs, etc.) I wonder how many of those namesakes have changed their usernames since

Calvin changed to Helka for a bit, but then went back to Calvin

Easy solution: replace the names with their user id

From my tally: DJMcMego pairs, Neil numbers, Bubbler numbers, Dennis and Dennis 2.0 numbers, sporeball numbers, Calvin numbers, Emanresu numbers

Of those, Calvin is the only one to change (and not for long), and Mego deleted their account

DJMcMayhem -> James

Oh yeah, forgot about that one

@AaronMiller Unfortunately, I can’t figure out any goofier way to do it than ₌ḋe□₌Π∑??-

It's interesting that some sites do this, and others don't

I think we've mainly done it in chat tbh

^^^ I just realized that autocorrect changed golfier to goofier lol

Oh, I just thought that was the intended word. It is Vyxal after all :P

lol

@AaronMiller deltas?

Oof

₌ḋe□₌Π∑□¯

Like that

ಥ_ಥ Me when outgolfed

I've had an extra year of vyxal experience than you tho :p

true

@exedraj @emanresuA I’m curious if you guys can find/tie/beat my answer to this

@exedraj On the other hand, and I'm speaking from experience here, there's something about being the language creator that makes you worse at it :P

@Dudecoinheringaahing the joke is that Aaron joined a year after Vyxal's creation

@Dudecoinheringaahing Can’t be worse if you’re the only one who uses it. *cries in Grok*

@AaronMiller may I have a hint?

The input is 3 separate numbers. Also, there is a single flag.

(The part about the flag isn’t a hint, I just figured I should mention that.)

Could you provide a test case?

@AaronMiller how many bytes would it be without the flag?

@exedraj f(2,4,6) == 10, f(4,4,6) == 6, f(6,4,6) == 4

@exedraj 7 bytes flagless

@AaronMiller thank you. That means that you aren't relying on auto-closing of structures (meaning it's about stack manipulation) and that it isn't a flag that deals with the whole stack (otherwise it'd be 8 flagless because W<element>)

shoot

Hence the chances are that it's the s or d flag

g or G don't make sense in this context, and everything else is just kc stuff or stuff that would make it longer than 7

(although it could be r somehow)

Actually, the flag is B /s

Unless of course you're using a /s

I still don't got it

@AaronMiller a 3rd hint?

It uses □.

Can I take z y x instead?

Actually better question: if there was a vectorising not-equals, would you have 5 with s/6 flagless?

(1) I didn’t, but I guess you can if you want, and (2) no

Sussy baka I've 5 with a flag, input as list

Which is 6 using the square

Oooh and it's different to yours

Md5 of my 6+flag (three numbers): bfca869b197d7e19cfb6d2deb468c0db | Md5 of my 5+flag (as list): 5a81548869e45c9daa1a79ea562df07f

@AaronMiller I beat you kekw get good

I tried taking input as [z,y,x], and got 4 bytes with flag. I got good.

I took the input as [x, y, z]

Proper order and everything

Here’s my 6+flag (three numbers)

lol I found a 4+flag with input as [x,y,z]

I can’t seem to figure out the 5+flag, though

4+flag (list) is 230d4b686a6939686f2b6cd1a59e14a0

Being super productive for six days in a row (not counting weekends). This is an epic record

I'd probably be pretty productive if I didn't keep checking TNB and/or CGCC every 10s lol

I've noticed sometimes I'll close the CGCC homepage, open it again in a new tab, and repeat a few times before I realize I'm in a loop lol

where productive = working on my hobby project for hours, not working for work

@AaronMiller Try it Online!

Also I really learned Rust a lot. I now hate some small dark corners of it

For TIB, I'm guessing?

Yes

@exedraj Is the input supposed to be a list?

@AaronMiller yes

@AaronMiller Try it Online!

I was trying stuff but implicit input is cursed...

My idea was lyxal.pythonanywhere.com?flags=s&code=_%22v%E2%89%A0%E2%88%…*&inputs=2%0A2%0A3&header=&footer= but it bad

ur link bad

Append a *

I can't be bothered fixing it

Protip: Base64-encode your permalink

@Bubbler How?

is there a better option?

What option?

URL-safe ASCII chars are almost precisely the ones used in base64, except that +/ need to be replaced with -_ respectively and = stripped

Or encodeURI everything, but apparently it doesn't handle *

You can manually replace * by %2A

base64url is definitely the best option IMO

It's even an RFC standard, IIRC

The only problem is that it's not JS built-in :P

^ inspired by @RedwolfPrograms

oh hey @okie

long time no see :)

hi

:D

Hi

*rickrolls cat*

get rickrolled

I got 9 stars on that last time I said it

Get chatrolled

crap

i actually clicked that link

although I looked at the link first

You have been chatrolled

@emanresuA no, this is a chatroll

That is... a mes.s.

rick/10

(f)rickroll

lyxroll

current cure for rick roll

@exedraj You animated that yourself?

yep

on a phone too

@okie It's not a rickroll unless it's the original video

it's used in case you are rick rolled

use it as anti-rickroll

Sometihng is wrong with this

dang, turns out I missed even more mappings on the vyxal language bar

I'll update it and send another PR later

Oof

Idea: Language flags for Vyxal

I don't know how I missed so many of them

I coulda sworn I had a file with all the pairs

Your brain gave you up, let you down, ran around and deserted you.

You missed a function that plays lyxroll

@okie no we have that

Try it Online!