The Nineteenth Byte

Lyxal

12:01 AM

@rak1507 I won't be able to work on vyxal for 2 hours because uni but I'll look into it soon

rak1507

there might be a way of doing it more golfily than user's 8 byte solution maybe

but I doubt it

Bubbler

Any Feed Back?

hyper-neutrino

@Bubbler oh, is this why you were asking what the function f such that f(f(x))=g(x) is called in the math.se chat room xd

Bubbler

Well, not exactly but closely related

rak1507

@Bubbler none other than the one I've already given about the ascending requirement making it a lot harder

Bubbler

12:13 AM

I'll post the first one soon, and the third needs more opinions

OldSandboxPosts

1:00 AM

Sandbox posts last active a week ago: Rob the King: Hexagonal Mazes, Challenge, Saboteurs in our Halls, Draw the flag of Bangladesh, Are All the Items the Same?, Print Every Code Golf tag

Sandbox posts last active a week ago: Execute a Befunge Chess Board, Exchange of money in least notes, Two player tic-tac-toe game, Packing numbers to interval

hyper-neutrino

that's a lot

Bubbler

I love when a sandbox challenge is titled "Challenge"

hyper-neutrino

i'm not sure how to even think about the new challenge ;-; the oeis also doesn't even have any sort of algo listed

also apparently a(1) to a(33) are within 5mil and then a(34) is >10^69

Bubbler

If you carefully derive the terms step by step, you will get how it works (and why a(34) is suddenly that large), but translating it into code is another challenge

New Main Posts

3

Q: The half-step of Fibonacci

Implement the 1-indexed sequence A054049, which starts like this: 1, 2, 3, 6, 13, 5, 9, 377, 21, 11, 89, 14, 8, 233, 16, 987, 18, 2584, 20, 6765, 55, 23, 28657, 25, 75025, 27, 196418, 29, 514229, 31, 1346269, 33, 3524578, ... This sequence is the lexicographically smallest sequence of positive i...

hyper-neutrino

1:08 AM

it's kind of weird how there's a 23, 25, 27, ..., 33 for every other element for a while

and then the next one isn't 35, but the huge number, lol. this is interesting

Bubbler

It's essentially a collection of disjoint chains. a34 is part of the "main" iterated fibo chain (which grows hyperexponentially), and the gaps are filled by starting a new chain using two smallest unused numbers

hyper-neutrino

i probably just have to look through this and eventually try generating the sequence assuming i didn't already know the values

i don't see the pattern yet but i see a bunch of smaller patterns within it that i'll probably eventually figure out

Bubbler

1:24 AM

a(34) = fib(377+1) = 4444705723234237498833973519982908519933430818636409166351397897095281987215864

+1 because the fibonacci is offset by 1. Interesting how it happens to start with four 4's

Wasif

2:01 AM

Nowadays the question traffic in main has increased, i missed 4 new questions in night

Lyxal

@user it works now

@rak1507 turns out I hadn't made ȯ reversible when given a function and a number. Now, the argument order no longer matters

@rak1507 I'm glad to see you experimenting with Vyxal. If you have any questions, feel free to ask me

hyper-neutrino

okay so I think i got a generator for the fib half-step working....... it's not at all golfed and i doubt this is even close to being optimal, lol

Bubbler

That's fast

hyper-neutrino

this is what i have right now

Bubbler

2:18 AM

Looks correct, assuming you will fix the hardcoded 100 later

hyper-neutrino

2:32 AM

lol i just forgot to change one of my hardcoded values when i added g; very smart of me

I might just golf this down and submit it just for ~~the FGITW~~ a reference solution

Wasif

Is it allowed to take until what number to print non hamming numbers like take 15 and output 1,7,11,13?

hyper-neutrino

2:50 AM

I don't think that's a standard of sequence, so you'll probably have to ask the OP

Unrelated String

I would assume no but yeah worth asking

hyper-neutrino

IIRC it's output infinitely, output Nth, and output first N that are conventionally allowed, with 1- or 0- indexing allowed for the second option except in challenges like the fib half step where only one of them actually makes sense

maybe some allow it (idak of any examples) so it'd be worth a shot asking but i doubt it

Wasif

Ok asked there

So its better to not post my solution until it clarifies

Lyxal

3:11 AM

I'm very excited for tomorrow

for tomorrow (at least in american date systems) is 4/20

and that's funny

Bubbler

You'd find it real funny if you use dd/m/yyyy, since it has 420 in the middle for 30 days every year for the 21th century

Razetime

it's more special if it's exactly one day

Lyxal

^

plus it happens every year regardless of century

Wasif

Its already fixed who are winning in the RO election

hyper-neutrino

not necessarily, thought i'd be surprised if something drastic enough happens within the next 21 hours to change the current standings

Wasif

3:18 AM

And also tomorrow is my birthday (4/20)

4

Lyxal

@Wasif i envy you

hyper-neutrino

was just gonna say, lyxal's gotta have jealousy over that

Wasif

Hehe thats funny

Lyxal

@hyper-neutrino I highly doubt I'd be able to coerce at least 3 people into voting to make a tie for 4th

Wasif

Does someone have birthday on 6/9 or 9/6

Redwolf Programs

3:20 AM

If I told everyone to vote for Lyxal so we can tie and both be ROs and Lyxal ends up overtaking me I'm going to be slightly annoyed :p

Lyxal

easy solution: 5 ro slots instead of 4

Razetime

@RedwolfPrograms for this exact reason I will vote for lyxal

Lyxal

@Lyxal haha jk jk... unless?

Razetime

tbh lyxal pretty far off

Redwolf Programs

I ended up voting for everyone by accident

Lyxal

3:21 AM

@Razetime not neccesarily

3 people would be enough to bridge the gap

Razetime

good luck finding 3 people

hyper-neutrino

TBT the last election when someone was complaining about FPTP being a bad system even though this election is far from FPTP lol

Lyxal

@Razetime I can think of 2 out of 3

hyper-neutrino

STV would be better but unfortunately we have no easy way of doing that

Wasif

A bad thing is you cannot reverse votes until the post is edited but why?

Lyxal

3:22 AM

@Lyxal actually I've got 3 in mind

the real question is can I be bothered to try and influence those three people in the next 21 hours

given that one of them is in a completely different timezone, I think the answer is a very easy no

Bubbler

Oh, so the election ends on Tuesday at 00:00? Somehow I thought it was at 23:59 on the same day

Lyxal

@Razetime heh I accepted that fact 6 days ago

Redwolf Programs

Someone undid an upvote on both Lyxal and me lol

hyper-neutrino

lol

Wasif

This is someone among us

Lyxal

3:27 AM

2 people among us

Wasif

Currently talking here

No it can't be Lyxal he last shown up 9 mins ago in meta, but it could be redwolf, he last shown up 2 mins ago, so that means lyxal maybe was downvoted by redwolf, and someone else downvoted Lyxal

hyper-neutrino

well, as it is with elections, we can only guess who voted what :)

Lyxal

@Wasif accurate

@hyper-neutrino that's where you're wrong kiddo

Razetime

@Lyxal wow, transpose is a 2 byte command in vyxal?

Wasif

But the "someone else" is probably none among us, because everyone didn't show up in the meta within a short time interval

Lyxal

3:34 AM

@Razetime it used to be one byte but somehow I accidentally forgot to include it in the rewrite

hyper-neutrino

@Lyxal o.O

i mean for any vote you can be 100% sure it wasn't me lmao

Lyxal

@hyper-neutrino I've always been transparent with my somewhat fraudulent voting activities

;p

Wasif

Oh i didn't notice i got my 4th starred message as my birthday gift, also number of stars in my most starred message is 4 and birthday month is also 4, i think i have a special connection with number 4

hyper-neutrino

@Lyxal right, but one can only trust what you say, there's no way to 100% confirm you actually voted the way you say you did even if it makes perfect sense and voting otherwise wold be strange

Lyxal

@hyper-neutrino would screenshots help?

hyper-neutrino

3:40 AM

@Lyxal those can be too easily tampered with using inspect-element, or just voting, screenshotting, and then changing the vote

it is actually somewhat important to an election that an individual cannot prove their vote even if they wanted to

Lyxal

@hyper-neutrino wow. I can't even admit to voting fraud

4

this is so sad

hyper-neutrino

see my memory is bad so i don't actually recall you admitting to voting fraud but unless you are using alt accounts to vote i don't see how you could be committing voting fraud

Lyxal

Apr 15 at 0:20, by Lyxal

Feb 11 at 0:48, by Lyxal

@cairdcoinheringaahing I'd make a comment about voting fraud but I've done it myself, so eh

2 days ago, by Lyxal

@rak1507 that may or may not have been a result of voting manipulation to break a 3 way tie

Feb 11 at 0:49, by Lyxal

I made it so that Whispers was lotm over factor

there's three admissions

hyper-neutrino

bruh moment

4

Lyxal

yet no one takes me seriously

this is a lyxal moment

@hyper-neutrino you mean editing a post then changing my vote doesn't count.

Obv I didn't do that with the ro election

Because the edit history shows I couldn't have

hyper-neutrino

3:55 AM

oh. that's... arguably an abuse of how the system works. i'm not too sure how i feel about not being allowed to change your mind though. so idrk how i feel about that lol

i mean, i did just edit an extra newline at the end of every one of the election posts just in case anyone wanted to change their vote

Lyxal

Dah even my voting fraud isn't actually fraud

This is so sad

Lyxal

funny commit message goes brrr

hyper-neutrino

why does your command dict save a tuple of a string and an integer

are you using eval to run the value mapped by the key command.......

Lyxal

@hyper-neutrino where?

Point out the example you mean and I'll explain it

hyper-neutrino

commands.py

"ḋ": ("vector = pop(stack); stack.append(all_combinations(vector));", 1),
"F": ("stack.append(Generator(fibonacci(), is_numeric_sequence=True))", 0),
"!": ("stack.append(Generator(factorials(), is_numeric_sequence=True))", 0),

Unrelated String

4:04 AM

👀

Lyxal

The string is what it transpiles as and the number is the default arity of the command

You do know vyxal is transpiled right?

hyper-neutrino

i do not

Lyxal

Oh

Lol

hyper-neutrino

that's cool

Lyxal

You can see the corresponding python with the c flag

hyper-neutrino

4:06 AM

h u h

very cool

Redwolf Programs

I should've just JIT transpiled Ash, interpreting it is very not fun

Lyxal

example

hyper-neutrino

i decided to make the branch interpreter in C because i hate myself or smth like that

Lyxal

It all started when I got tired of trying to interpret keg

I've transpiled my languages since mid 2019

Wasif

Is there any nice articles on how to create esolangs

Redwolf Programs

4:08 AM

Probably not

It's a very niche hobby :p

Just try to make one then work your way up to actually good ones

hyper-neutrino

can't seem to find anything on esolangs.org

Wasif

Hehe i have heard a blog is coming on ppcg

Bubbler

There was a question about creating golfing langs on CGCC

but not esolangs in general

Wasif

Can we maximum 256 characters in Code page?

Redwolf Programs

My first esolang was bad I kinda want to try using it on CGCC just for fun

Wasif

4:09 AM

Can we get maximum 256 characters in Code page?

hyper-neutrino

yep! you can propose ideas here. language design and development is already proposed

Redwolf Programs

@Wasif Unless you can put more than 256 values in a byte

hyper-neutrino

@Wasif yes, because that is the number of possible values of a byte

Lyxal

@hyper-neutrino the integer in the tuple is mainly for vectorisation purposes. I had no clue on how to vectorise things other than monads so I decided to store the arity hard coded

hyper-neutrino

@RedwolfPrograms i'd be very impressed

Redwolf Programs

4:09 AM

You could use 9 or 10 bits per character, though

Lyxal

@Wasif in a single byte codepage, yes.

In a double/multi byte codepage, no

hyper-neutrino

@Lyxal that makes sense (i figured the second value was the arity)

Wasif

Oh i understand

Bubbler

@Wasif Protip: press ↑ on your keyboard to edit your last message

Wasif

Has somone written an eval based esolang?

Lyxal

4:10 AM

See cairds esolang named Orst for a double byte code page with 512 commands

@Wasif eval based?

Redwolf Programs

@Lyxal Wouldn't double byte be 65536?

Wasif

@Lyxal yeah

Redwolf Programs

Like eval for recursion as the only looping?

Lyxal

@Wasif wdym by eval based?

hyper-neutrino

iirc how jelly does dyad vectorization is to apply [a+x for x in b] if b is a list, [x+b for x in a] if a is a list, and [x+y for x, y in zip(a, b)] + the overflow values if both are a list (vectorizing the value in the comprehension too if applicable)

Bubbler

4:11 AM

@Wasif I think I've seen something that tries to eval itself over and over, can't recall its name

Wasif

@RedwolfPrograms i actually meant interpreter is eval based that means read line by line and replace and eval

Redwolf Programs

That's called transpilation

Lyxal

@Wasif Vyxal and keg both fit that description

@hyper-neutrino that sounds like what my vectorisation function does

Except mine also accounts for generators

Because generators are a completely different data type lol

@RedwolfPrograms probably. Perhaps caird used a variable byte codepage

hyper-neutrino

do you support unbounded/infinite sequences or smth

Lyxal

Correct

But even mapping/filtering is a generator

hyper-neutrino

4:16 AM

nice

Lyxal

AOC showed me vyxal was way too slow

So I made a generator wrapper to encompass both yield generators and things like map/itertools objects

Redwolf Programs

> ...it would still pop from the global stack as it cannot get any more global.

I simultaneously love and hate my old writing style

hyper-neutrino

ah yes, the global stack here is made out of global

Lyxal

Imagine comprehensively explaining things

Redwolf Programs

Also nobody google for my old esolangs they're embarassingly bad :p

hyper-neutrino

4:19 AM

well i know what i'm doing now

Redwolf Programs

I wrote the first one before I knew the word accumulator

Lyxal

Y'all won't beleaf what I've been doing just now

Shredding leaves into pieces is fun

Redwolf Programs

So I called it the "pipe" because the value would "travel" along the program and get modified. I don't know why.

hyper-neutrino

it has just occurred to me that i do not feel like reading through javascript

Redwolf Programs

@Lyxal that aspect ratio though

Lyxal

4:22 AM

@RedwolfPrograms it's called taking pictures on my phone

hyper-neutrino

that's still a rather long aspect ratio for a phone

Lyxal

It's full screen lol

I like my pictures taking up the entire screen

Wasif

So your another hobby is added alongside putting pegs into clothes

hyper-neutrino

is that picture the same ratio as your phone or is it extra long

Lyxal

Same as phone

Redwolf Programs

4:24 AM

This is cursed.

Lyxal

Keg is more cursed

Wasif

@Lyxal you made keg too

Lyxal

@Wasif correct

I had no clue about how to make a good golfing language

So I made the best I could do

Now I know a whole lot more

Thus, vyxal

Wasif

You could make the monologue look like poem

How to make a good language i had no clue, so i made the best i could do, ....

Lyxal

My laptop is sentient it seems. I was listening to mambo number 5, updated my computer and tried to sign in using the fingerprint sensor. I kid you not, it told me to move my finger to the left and then to the right before letting me in. One of the lines of the song is something like "take one step left and move to the right" or something

Good job Microsoft

And it even winked at me when it unlocked

Redwolf Programs

4:31 AM

Maybe it's an easter egg :p

Lyxal

I think it's excited about being on a roof

Wasif

In linux sudo has a mode like this too, it mocks you cutting jokes when you fail to enter correct password

Lyxal

"Take one step left and one step right...And if it looks like this then you doin it right"

that ain't mocking

it's picking up on my music tastes

its emulating the memes i like

Redwolf Programs

4:51 AM

I should be the person who writes math problems

> Question 4: A train leaves Chicago at 40 MPH heading west. One hour later, a train leaves 400 miles away, heading east on the same track at 60 MPH. Unnoticed by the operators, the trains grow closer. By 8:00 AM, they come within view of each other, exactly two miles apart. It is too late. Both engage their brakes, slowing to speeds of 20 MPH and 30 MPH respectively at the time of the crash. There are no survivors. What time did the crash occur?

Lyxal

at 6:90PM

Redwolf Programs

Actually a better question to ask would be what time the crash occured relative to the time the train left Chicago

That involves calculating when they would be two miles apart

Lyxal

69 minutes after 4:20PM

I just answered both your questions

you should be happy

hyper-neutrino

do they slow linearly?

Redwolf Programs

Yes

hyper-neutrino

4:55 AM

i assume at a constant rate from when they see each other until the instant they crash

Redwolf Programs

Yep

hyper-neutrino

unless i misunderstand this, the delay between the trains' departures shouldn't matter? is 400 miles the distance between the trains at start or the distance from chicago to the other station

oh actually if we know the trains are at 40mph and 60mph at 8 AM 2 miles apart and slow linearly to 20 and 30 that's already enough info

Bubbler

Yeah I think that's the relevant part

Redwolf Programs

That's why I changed it to be relative to when the chicago train left

I think it'd be 4.58 hours after the chicago train left that they'd be two miles apart

Bubbler

I think it's correct

hyper-neutrino

4:59 AM

2/75 hours? idk just from looking at it for a bit and attempting to do mental math with my 3 brain cells

that's 00:01:36 (8:01:36 AM i guess)

Bubbler

Relative speed decreases from 100mph to 50 linearly, traveling two miles

hyper-neutrino

yeah

Bubbler

Average speed is 75mph, so it must be 2/75 hours indeed

hyper-neutrino

so the area of the trapezoid under the speed graph if it takes X amount of time (hours) would be (100 + 50) * x / 2 or 75*x

Redwolf Programs

I'll go test it, anyone know how to get into those control rooms?

hyper-neutrino

5:00 AM

oh that was a much smarter solution

see i'm not smart (i'm hyper-neutrino) so i immediately tried to put the speed on a graph and observe the area under it lmao

Bubbler

Well, that was not a very good question because it has too much superfluous information

Redwolf Programs

Not if you're in the US

Trick the student into failing

Success

Bubbler

It's not a math question, it's a reading comprehension question :/

hyper-neutrino

still a bad question just that ~~the question seems not as bad because the entire education system is worse~~

Bubbler

though yeah, such things do appear on many tests, even official ones

Redwolf Programs

5:04 AM

The official ones are the worst from my experience

Bubbler

and it's also bad because it uses mph

hyper-neutrino

yeah, it should be using hamburgers per gun (or was it vice versa? i forget the standard)

Redwolf Programs

Well people got mad at me for using light years per middle c

Razetime

6:53 AM

@RedwolfPrograms not major c?

caird coinheringaahing

7:59 AM

Wow, the top 4 HNQ posts by hotness are all from us, nice job guys!

Unrelated String

wow

caird coinheringaahing

We have 5 total on HNQ, at 1,2,3,4 and 9th :P

hyper-neutrino

hey, i have two questions on the front page on HNQ right now :P nice

Wasif

I should post my sandboxed questions to main

Unrelated String

I should sandbox a challenge that actually feels worth posting one of these days

hyper-neutrino

8:03 AM

i wish i was creative enough to come up with a lot of challenges

i only thought of the rain challenge because i went for a walk yesterday and got rained on and realized that even though running gets you hit more, i probably could've avoided the rain getting heavier if i tried to run back home sooner

caird coinheringaahing

@hyper-neutrino The problem isn't coming up with a lot, it's coming up with good challenges

hyper-neutrino

i mean coming up with a lot of good challenges :p i'd like to think at least some of mine are good, but not many

Lyxal

@hyper-neutrino imagine living a life interesting enough to make challenges

Made by Lyxal gang

caird coinheringaahing

If you really want to post a challenge, go browse OEIS or math Wikipedia pages. The results aren't bad, they're just extremely forgettable :P

Lyxal

Sequence challenges are kinda overdone imo

Would a challenge implementing an automated version of the "you're not x you're Y" joke be interesting enough for main?

Wasif

8:07 AM

We can get challenge idea everywhere
I just got
If we compress the browser window, our usernames compress like

Wasif -> was
Caird -> cair
Lyxal -> Lyx
Hyper-neutrino -> Hy (DIamond)
Unrelated string -> Unr

and so on

This could be a challenge

Lyxal

@hyper-neutrino easy solution: get wasif to email you a challenge idea

Worked for me

I got 4 challenge ideas (emailed one included) posted into the sandbox

As in I found a mini streak of ideas

Wasif

You go and post your PPCG tags challenge today

My Vyxal answer lost to Jelly, Husk, 05AB1E for just 1 byte :-( (Non-hamming numbers question)

Lyxal

Use a filter lambda

Makes it 5 bytes

Try it Online!

Wasif

Wow its too helpful, thanks!

Lyxal

@Wasif go and beat everyone!

And remind me to upvote at utc midnight tomorrow too

I'm out of votes for today

Wasif

8:22 AM

Well I have already upvoted for everyone, including you

Lyxal

I mean your answer

I can't upvote your answer

Wasif

oh

Lyxal

lol

Wasif

I thought it was for RO election

hyper-neutrino

is there any way to return a function from a function in C

caird coinheringaahing

8:25 AM

@Lyxal How? It's not even 9am UTC

hyper-neutrino

i'm trying type signature void*(*) f(...) and void*(*)() f(...) but neither seem to work

Lyxal

@cairdcoinheringaahing I vote a lot

caird coinheringaahing

67

Q: How to make a function return a pointer to a function? (C++)

I'm trying to make a function that takes a character, then returns a pointer to a function depending on what the character was. I just am not sure how to make a function return a pointer to a function.

c++ return-value function-pointers

Bubbler

@hyper-neutrino The type of a pointer to int f(int x) is int (*)(int) (iirc)

Lyxal

@Wasif I've come to terms with the fact I probably won't win. But the fact that you absolutely dominated everyone is exciting!

caird coinheringaahing

8:27 AM

@Bubbler Wrong person :P

Bubbler

Dang frick, I though I clicked on HN's message

Lyxal

Frick?

Did you say the funny word!?!

hyper-neutrino

i ended up figuring out another way to do it which probably works better with what i'm trying to do; thanks everyone tho

Bubbler

And I guess it confirms that my C knowledge hasn't gone away yet

Dec 18 '20 at 5:41, by Bubbler

Frick

If you're not sure about C types, try this challenge:

46

Q: Read out the C variable declaration

Background Variable declaration statement in C consists of three parts: the name of the variable, its base type, and the type modifier(s). There are three kinds of type modifiers: Pointer * (prefix) Array [N] (postfix) Function () (postfix) You can specify a list of function arguments inside th...

code-golf parsing c syntax

hyper-neutrino

oh i remember this. it's a cool challenge

caird coinheringaahing

8:41 AM

Is it just me, or have the review queues been kinda quiet for the past few days?

Lyxal

No they seem to be a bit quiet

Hey @cairdcoinheringaahing, are you still considering applying for uni in Australia? Because if you are, you totally should.

It'd be cool to have another code golfer down under

caird coinheringaahing

@Lyxal I was looking at it, but decided that if I do any uni in Australia, I'd rather it be a year abroad

Lyxal

Understandable

So like an exchange student program?

caird coinheringaahing

Either that, or a lot of unis here just let you study your second year abroad at a partner uni

Lyxal

Wait so how many years is your course?

caird coinheringaahing

8:46 AM

Typically 3

You can do 4 year courses in some subjects

Lyxal

Ah, comsci then?

caird coinheringaahing

Mathematics

Lyxal

Oh very nice

caird coinheringaahing

CS has always been more of a hobby for me

I enjoy coding and hate all the theory around it :P

Unrelated String

i enjoy the theory around it until i try to actually understand and/or use it

Lyxal

8:49 AM

laughs in compiler design in 2 years time

xnor

@Bubbler For your puzzling SE sequence question, metagaming from your half Fibonacci challenge made me notice that f(f(n)) is always a multiple of n

And maybe the lexicographically first such sequence, though some condition would be needed to exclude the trivial f(n)=n

Lyxal

Wow TIL my degree apparently only has 2 math subjects, both of which are first year

Good to know

caird coinheringaahing

@Lyxal Linear algebra is one of them?

Lyxal

Probably

Well I gtg for now

O/

Bubbler

9:13 AM

@Lyxal To me compiler design was relatively easy and fun, compared to e.g. operating system and database

Newly Featured Questions

29

Q: Separate a list into even-indexed and odd-indexed parts

Inspired by this question: Make a function (or a full program) that receives a list of numbers and outputs the list rearranged, so that even-indexed numbers appear first, and odd-indexed numbers follow. The values of the numbers themselves don't affect ordering - only their indices do. All indic...

code-golf array-manipulation

8

Q: Square free Numbers

Given a number N, write the shortest complete program to find the number of square-free integers below N. Sample Input 100000 Sample Output 60794 Constraints: Should work for all positive N below 1,000,000 Should not take more than 10 secs. Please do not use built in functions, please.

code-golf restricted-time

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Q: A prime test that's LITERALLY prime

Write a program that will test the primality of a specified number, and give the output as a Boolean value (True is prime). Your prime test can (but doesn't have to) be valid for the number 1. Here's the catch: your program itself has to sum to a prime number. Convert every character (including...

code-golf math restricted-source primes

Lyxal

@Bubbler that's what I mean

I'm looking forward to it

Bubbler

9:31 AM

Cool

Anush

hi all

CMC following a previous conversation... if you toss 10 coins each with prob p of getting a head, can anyone write code to compute the probability there is a run of at least 4 heads?

Neil

@Wasif yeah, unfortunately doing that makes it decision-problem, which is much easier to code

anyone know the direct link to see your progress towards a badge?

caird coinheringaahing

@Neil Which badge?

Not all of them have progress tracking

Neil

legendary, although epic will do if it goes to 51/50

Manish Kundu

There is a next badge tab in the profile

Neil

9:35 AM

yeah I specifically asked for the direct link thank you

Manish Kundu

oh nvm

caird coinheringaahing

@Neil I don't think there's a way to see progress aside from the tab in your profile

A couple (the review based ones and tag editing) have progress bars in the specific area, but the rest are profile-only tracking

Anush

maybe it's too mathey for here?

but surely nothing is too mathey for here :)

Neil

huh, I thought there was a way, but I must have imagined it

caird coinheringaahing

@Neil You can mess around with SEDE as that has pretty much all the info needed to track badges, but that seems like overkill for something like Legendary

rak1507

9:43 AM

not a fan of the change to the hamming problem, breaks all sequence convention

caird coinheringaahing

Because Jelly has such good builtins, it doesn't even save a byte :/

rak1507

hopefully the author will change their mind

caird coinheringaahing

Any more feedback/votes on this answer, or the question its on?

Delfad0r

@cairdcoinheringaahing I don't know a thing about Jelly, but I feel like there should be a <=6 bytes solution to the Hamming problem if you check whether n divides 30^n instead of checking prime factors

caird coinheringaahing

@Delfad0r Unfortunately not, as it takes an extra byte to deal with 0 (remove the Ḋ to see)

There's this 6 byter that uses the same format as the Vyxal answer, but that's iffy IMO

Delfad0r

9:58 AM

@cairdcoinheringaahing :(

caird coinheringaahing

@Delfad0r I've edited in the 6 byter that filters the numbers < n, because it is technically valid, so thanks!

Kept the more typically sequence 7 byte version because it looks like there's some disagreement in the comments about allowing the <n version

Delfad0r

Yeah, I'm actually one of the upvoters of rak1507's comment

rak1507

yay

caird coinheringaahing

@Delfad0r Same; it basically just turns it into a slightly more convoluted decision-problem

Delfad0r

10:14 AM

Also, the new rule doesn't save any bytes for my solution. That's the main reason I'm against it

rak1507

I don't really like sequence challenges anyway as they're annoying and difficult in languages that don't have convenient builtins or infinite lists

caird coinheringaahing

Personally, I prefer sequence challenges that aren't based on "X is part of the sequence if Y", and are instead "here's how to calculate the sequence" (nth term, term-to-term relation etc.)

rak1507

yeah, exactly

caird coinheringaahing

Otherwise, and especially in golfing languages, it just becomes "count through the integers, return those that are true"

rak1507

yeah, husk: f(whatever)N ez

caird coinheringaahing

10:17 AM

Jelly: ...µ# :P

rak1507

there should really be 1 byte builtins for these things

caird coinheringaahing