The Nineteenth Byte

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Bubbler

01:12

If someone needs some challenge ideas:

Apr 24 at 7:52, by petStorm

I hope to have a magic book that contains all possible challenge-suitable ideas.

Apr 24 at 7:54, by Bubbler

@petStorm I have three of them. They are called Google, Wikipedia, and OEIS.

New Main Posts

02:05

Q: The Fibonacci Cube Sequence

What is the Fibonacci Cube Sequence? The Fibonacci Cube Sequence is a sequence derived from the Fibonacci sequence starting with one. The first 3 numbers of the Fibonacci sequence (starting with one) are 1, 1, and 2, so the first number of the Fibonacci Cube Sequence is the diagonal length of a c...

Lyxal

02:42

@HyperNeutrino can you reserve days 6, 11 and 23 of the AOG for me?

I'm also potentially going to draft one for day 9 and 18

HyperNeutrino

02:59

@Lyxal Sure thing. In any case I won't be done 25 before even December probably so I can always just move my challenges around; I probably won't have any day-specific ones as long as they stay in order.

I am curious why specifically those days though :P

Lyxal

Just because that's what I deem most appropriate for each challenge

No other reason

HyperNeutrino

Ah, okay

Lyxal

No ha ha funny reasons (except if I also do day 9)

No specific patterns

Just what I came up with while going to sleep last night

HyperNeutrino

I was just wondering if the specific numbers meant anything :P I was half guessing probably just random numbers which is fine, mine don't have any relevance tied to the number either

New Sandboxed Posts

03:55

A: Sandbox for Proposed Challenges

AOG Day 5: Deliver Invitations code-golf graph-theory (This challenge is from the perspective of a delivery person, not the usual protagonist) You were given a map with instructions to deliver invitations to several people. However, whoever gave it to you forgot to include their address! They pro...

New Main Posts

04:09

Q: Find the size of pattern in 1/n

This problem is based on non-terminating, repeating decimal points. Let \$n\$ be any integer, say \$7\$. Then, \$1/n = 1/7 = 0.142857142857142857...\$ We see a pattern like, 0. 142857 142857 142857 ... In this 142857 part is repeating always, which has length of \$6\$. Or, if \$n = 11\$, then \$1...

code-golf math pattern-matching precision

4 hours later…

New Main Posts

08:15

Q: Filtering Messages

I came across this problem on Leetcode (original, section 2; also attached below). I thought it would be as simple as counting the lexicographic difference between 2 strings (as exemplified here) and then removing 26*(length(A) - length(C) + 1). I've tried with a couple different strings and this...

string fastest-code

1 hour later…

Sisyphus

09:32

Q for jelly experts: what's the shortest way to do 'zip or zero'? eg [1,2,3,4],[5,6,7],[8,9] -> [[1,5,8],[2,6,9],[3,7,0],[4,0,0]]

Guess it can be a CMC as well :)

Adám

@Sisyphus Q for Jelly experts could be the title of a tutorial.

@Sisyphus APL (Dyalog Unicode), 3 bytes ,⌿↑

Anush

09:57

@Razetime cool!

Unrelated String

z0?

@Sisyphus tio.run/##y0rNyan8/7/K4P///9GGOkY6xjomsTrRpjpmOuZA2kLHMhYA

Sisyphus

@UnrelatedString That's the one. Knew it had to be somewhere!

Unrelated String

...you know, it's funny how it makes perfect sense for it to take the filler as an argument, but I also can't remember having ever used any other filler than 0

Sisyphus

The idea is that for the bijection question I thoughy maybe it was possible to use the bijection of 'interleaving binary bits', but it seems like Bz0ṚFḄ is not any shorter than the current 6... :(

1 hour later…

Neil

11:28

@Sisyphus oh of course you can just interleave all of the bits in one go instead of reducing

New Sandboxed Posts

12:10

A: Sandbox for Proposed Challenges

The Fibonacci Rectangular Prism Sequence fibonaccicode-golf What is the Fibonacci Rectangular Prism Sequence? The Fibonacci Rectangular Prism Sequence is a sequence derived from the Fibonacci sequence starting with one. The first 3 numbers of the Fibonacci sequence (starting with one) are 1, 1, a...

5 hours later…

Redwolf Programs

16:52

CMQ: What's your ratio of upvotes to downvotes (on other people's posts)?

Mine's 155

caird coinheringaahing

As in upvotes cast ÷ downvotes cast?

Redwolf Programs

Yeah

caird coinheringaahing

36.5 here

John Dvorak

20:3 (CGCC)

caird coinheringaahing

@JohnDvorak That's a :, not a . right? So for every 3 downvotes, you cast 20 upvotes?

John Dvorak

16:56

correct

Anush

quick sanity check... If (7/8)^x = delta does this imply x=log_2(1/delta)/log_2(8/7)?

John Dvorak

on SO it's 3:4

Anush

@JohnDvorak is that for my question?

ah I guess not

John Dvorak

@Anush that's correct ... both questions are

Anush

hooray :)

caird coinheringaahing

17:01

@RedwolfPrograms Related CMQ: When was your last downvote on a non-deleted post?

Sep 13th for me

Redwolf Programs

Two days ago for me

3 hours later…

Neil

19:36

@RedwolfPrograms 187

Newly Featured Questions

19:59

Q: Polynomial Long Division

Implement polynomial long division, an algorithm that divides two polynomials and gets the quotient and remainder: (12x^3 - 5x^2 + 3x - 1) / (x^2 - 5) = 12x - 5 R 63x - 26 In your programs, you will represent polynomials as an array, with the constant term on the tail. for example, x^5 - 3x^4 +...

code-golf math abstract-algebra polynomials

Q: A naturally occurring prime generator

There are quite a large number of prime generating functions. Pretty much all of them are constructed and are based on the sieve of Eratosthenes, the Möbius function or the Wilson's theorem and are generally infeasible to compute in practice. But there are also generators, that have a very easy s...

code-golf number sequence primes number-theory

Q: Curve Stitching

Curve stitching is the process of "stitching" together multiple straight lines in order to create a curve, like so: For an explanation of curve stitching, visit this website. We will be drawing our curve in the top left of the screen, as shown in the image above. Given an integer n (via STDI...

code-golf graphical-output

1 hour later…

Lyxal

21:04

@RedwolfPrograms 263.75

2 hours later…

Lyxal

23:12

@HyperNeutrino (sorry about still going on about the AOG): I've come up with a kinda storyline for days 15-23 if you're interested.

Day 15: A sudden storm hits and the house where the party is being held needs to be secured (challenge [to be better worded]: determine how much weight is needed so that it doesn't get blown over or something)

Day 16: As a result of said storm, your party decides to help those who were impacted by giving care packages (challenge: sort items into boxes)

Day 17 and 18: Taking a break from the "hard work" (I'll write these... it's a surprise)

Day 19: Everyone calls their Ubers to go home (challenge: uber driver's perspective [kinda like day 5] ... don't know what exactly)

Day 20: You as the party host almost forgot to give everyone their presents (I'll write this one too)

Redwolf Programs

Maybe put these in a gist or something to avoid taking up a bunch of space in the chat

Lyxal

yeah true

Redwolf Programs

Those do seem like interesting challenges though

caird coinheringaahing

For the more specific details a gist (or sandbox posts) are a good idea, but (especially given how quiet the room is), I don't see an issue with posting elevator pitches here

Lyxal

@HyperNeutrino gist.github.com/Lyxal/77853aca538c743d6de8a8d0a61813d2 (that'll probably be my last AOG ping)

HyperNeutrino

23:39

@Lyxal Ooh, a storyline. nice :D I'll reserve 17, 18, and 20 for you then, and I'll think of challenge ideas to fit those themes as I'm creating and I'll let you know if I come up with anything good

Lyxal

and 23

don't forget 23

HyperNeutrino

right. i already have that one reserved along with 6 and 11

Lyxal

oh good

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