The Nineteenth Byte

@NathanMerrill that's the opposite of abuse. If an answer is bad enough to lose the author rep, it encourages good behavior for them to delete the incorrect answer (for a Q&A site)

Nathan Merrill

huh, I never thought of it that way

good point

R. Kap

You know, it seems like my challenge is very trivial. Although it may be too late to make any drastic changes now, do you think I could have disallowed the use of the explicit formula to solve the challenge?

Nathan Merrill

@R.Kap what do you mean by "formula"?

R. Kap

@NathanMerrill The formula m*n*(m+1)*(n+1)/4

That is the explicit formula defined for the number of rectangles.

Nathan Merrill

6:07 AM

right, but is m*n*(m-1+2)*(n+1)/4 the formula?

Sherlock9

m*(m-1)/2 * n*(n-1)/2 where m and n are the number of grid lines horizontally and vertically, respectively

Dmitry Kudriavtsev

NO ONE has even VOTED on my question

Sherlock9

Because we're still debating it here

Zwei

if you ban that formula, I'll just use the triangle number one :^)

Nathan Merrill

@R.Kap my point, is that its really hard to make restrictions/exceptions. That's why Do X without Y challenges are usually off topic

Mᴀʀs Uʟᴛᴏʀ

6:08 AM

@R.Kap That's just the triangular number formula multiplied together, and that's assuming some points are collinear, otherwise m == n

Doorknob

@DmitryKudriavtsev Don't delete and repost posts. It creates unnecessary clutter.

R. Kap

I now feel like answers to my challenge are only going to differ in the language used.

I spent hours on that challenge...

Nathan Merrill

@R.Kap if you are going for non-triviality, create a part 2, where rectangles have to be unique in size (and you list the coordinates for the lines)

R. Kap

@NathanMerrill I wanted to use coordinates in this challenge, too, but @HelkaHomba said it would be better to use a 2 integer input.

Dennis

@orlp Jelly's base conversion supports array -> integer with a complex base, but I'm not sure how it would help here.

Dr Green Eggs and Iron Man

6:11 AM

@DmitryKudriavtsev No one is obligated to. I didn't upvote it because it's not an extremely interesting challenge. Since there's no algorithm or logic to implement, the shortest answer purely comes down to language syntax.

Sherlock9

@R.Kap What's done is done. Make another challenge and I promise to help if I can

Nathan Merrill

@R.Kap the coordinates for points was a bad idea IMO. However, listing coordinates for lines is a much better one.

Dr Green Eggs and Iron Man

Don't take it too personally. Writing good challenges is extremely hard.

Nathan Merrill

^

orlp

@Dennis oh no it doesn't I'm kinda dumb today sorry

Dr Green Eggs and Iron Man

6:12 AM

Try the sandbox next time, it'll help.

R. Kap

@NathanMerrill I'm thinking of creating one where not only horizontal and vertical lines are used, but also diagonal lines, so you have to count all the polygons created.

Nathan Merrill

(that's literally the first time I've careted)

3

DerpfacePython

@LeakyNun Uhhh... I'm going to upload the Pyramid solution tonight.

Sherlock9

@R.Kap Ooh :D

DerpfacePython

For the 16 logic gate thing.

Nathan Merrill

6:13 AM

@R.Kap maybe? I still like the original one

R. Kap

@NathanMerrill I still feel like that could be trivial somehow.

Nathan Merrill

@R.Kap oh, if you do do that, are you counting concave polygons?

Zwei

@DrGreenEggsandIronMan by the way, how would I do escape in V?

Helka Homba

@R.Kap Yeah but I'm not always right. I didn't realize it would be just T(n)*T(m)

:shruggyguy:

Zwei

or anything like <C-a>

Dr Green Eggs and Iron Man

6:15 AM

@Zwei Do you have vim installed? That helps.

Nathan Merrill

@R.Kap a really good test is to create a sequence based on your problem, and then enter it in at OEIS

Zwei

I use neovim but am on my iPad right now

Dr Green Eggs and Iron Man

Unfortunately, it requires the actual unprintable ASCII character

Zwei

ahh

Dr Green Eggs and Iron Man

I'm working on a way to make that more convenient

R. Kap

6:15 AM

@NathanMerrill Both convex and concave. What do you think?

Zwei

how about ^a for <C-a>

Dr Green Eggs and Iron Man

Although I'll be pretty busy these next couple weeks so it won't happen any time soon

Zwei

okay

R. Kap

@DrGreenEggsandIronMan Are you talking to me? If so, I did use the sandbox.

Nathan Merrill

@R.Kap I'm actually guessing that allowing concave has a higher chance of being trivial

but I may be wrong

Dr Green Eggs and Iron Man

6:16 AM

@Zwei That's not ideal since ^ is also a vim command, and ^a is two bytes, not one.

Zwei

right

Dr Green Eggs and Iron Man

@R.Kap no, I was talking to Dmitry

R. Kap

@NathanMerrill Both will be even more nontrivial. And I doubt there will be any sort of sequence when using diagonal lines.

@DrGreenEggsandIronMan Oh, ok.

Nathan Merrill

@R.Kap probably. If you allow concave, then people may take the lines, convert it into a graph, and then count the number of circuits in the graph

Dr Green Eggs and Iron Man

@Zwei what I'm going to do is pick some unicode characters, and internally map them to the unprintable ones. I've picked out a few, but most of them I'm still undecided on. I know I want alpha == ^a, and ♡ == ^v

Nathan Merrill

6:19 AM

convex-only will actually require measuring angles

(that said, I'm not sold on which on is better)

Dr Green Eggs and Iron Man

And also, bytes above 0x80 are all mapped

Nathan Merrill

I kind of like the idea of turning an image into a graph

Zwei

ahk

I'm just trying to figure out how to get unprintable ascii characters in the tryitonline thing

Helka Homba

is lexicographically = lexically? (as in alphabetical ordering)

Dr Green Eggs and Iron Man

I actually use vim on mobile. It's the most convenient way I know of.

Zwei

6:22 AM

I do believe that lexicographic ordering is indeed alphabetical ordering

Dr Green Eggs and Iron Man

Does that make me a nerd if I have vim and python both installed on my phone?

DerpfacePython

What does implies mean?

So like a implies b.

Hello?

Zwei

how did you get vim on your phone?

the best I can think of is sshing into a raspberry pi

Dr Green Eggs and Iron Man

No, it's all native

Zwei

oh

well, won't be able to do that on my iPad

Nathan Merrill

6:24 AM

@DerpfacePython it means that if a is true, then b must be true

Dr Green Eggs and Iron Man

It's on the app-store, although I'm on a Droid. Not sure if it's on iPad.

Doorknob

@Zwei termux.com or similar

Zwei

I wanted some android device but no, I had to inherit an apple thingy :(

DerpfacePython

@NathanMerrill So if a = 1, then b must = 1?

R. Kap

@NathanMerrill But is that really is easy as it sounds? If so, then I will allow only convex.

Nathan Merrill

6:25 AM

@DerpfacePython only if you mean 1 for boolean values

Dr Green Eggs and Iron Man

@Doorknob "Your device is not compatible with this version" ;_; Y U do dis Google?

Nathan Merrill

@R.Kap neither of them are easy. Converting a bunch of lines into a graph isn't trivial (but isn't too difficult either*

finding all of the circuits in a graph, however, is pretty trivial

R. Kap

@NathanMerrill Well, you don't want it to be too easy, but you also don't want it to be too difficult, correct?

Nathan Merrill

@R.Kap depends on what you want. My highest upvoted questions are my least interesting

R. Kap

@NathanMerrill Well then, in that case, I will only make it too that they have to count the convex polygons, although can;t that circuit method also be applied to those?

Dr Green Eggs and Iron Man

6:28 AM

Dang it. I wanted to be the first to congratulate Martin on 100k, but it'll probably happen while I'm asleep. :/

Doorknob

We beat CR

Nathan Merrill

@R.Kap no, a more complex data structure would be required. A graph doesn't know anything about angles

Dr Green Eggs and Iron Man

Well, technically not yet. :P

Dennis might suspend him to take the lead, haha.

R. Kap

@NathanMerrill All right then. I'll propose that challenge right now, although then I will have to make another GIF...

Dr Green Eggs and Iron Man

I seriously need some shut-eye. G'night everyone!

R. Kap

6:31 AM

@DrGreenEggsandIronMan G'night mate.

Helka Homba

@NathanMerrill Well I have a challenge but it's not mathy and not ready today. It's about turtles!

Nathan Merrill

@HelkaHomba lol, is it like your "count the number of rice" challenge?

New Main Posts

6:48 AM

0

Q: Print the orders of the finite simple groups

The finite simple groups are listed at: https://en.wikipedia.org/wiki/List_of_finite_simple_groups They are famous for being the very, very complicated solution to a very simple and fundamental problem in mathematics. What better data to try to efficiently output in code golf? If you would like...

New Main Posts

7:03 AM

0

Q: Integer goes back and fourth through time

Input: An integer. Output: First convert the integer to it's equivalent Roman Numeral. Then convert each capital letter of that Roman Numeral to their ASCII/UNICODE decimal value. And output the sum of those. Example: 1991 -> MCMXCI -> 77+67+77+88+67+73 -> 449 ^ input ...

code-golf integer roman-numerals

muddyfish

back to SO I go...

first day at work

Katenkyo

@muddyfish Have a happy new work !

Nathan Merrill

bah, I hate doing piping

Sherlock9

7:38 AM

I have a challenge type idea that I'm not sure will work

step-count where the challenge is to create a program that will solve the challenge using as few steps as possible. Steps defined as assignments, each step in a map, for loop, while, other distinct statements.

I'm not sure what will count at the moment

Thoughts?

Mᴀʀs Uʟᴛᴏʀ

@Sherlock9 That would be like fastest-code

plus, lower-level code will almost always perform less well, although i guess that's what normally happens

Sherlock9

7:56 AM

I'm just thinking in terms of steps on a really long flowchart.

Dennis

@LeakyNun There seems to be a bug somewhere. I should be able to remove the last jnz from this answer, but it enters an infinite loop after printing the first line. Will investigate tomorrow.