The Nineteenth Byte

12:03 AM

0

Q: Why can I document my copy-pasted C# StackOverflow code with a URL without a comment?

I found this great C# code that solves my exact problem. So I copy/paste it in and document my "work" by pasting the URL that so inspired me: THIS WORKS!!! public class Program { public static void Main(string[] args) { https://helloworldcollection.github.io/#C%E2%99%AF ...

c#

caird coinheringaahing

@NewMainPosts ಠ_ಠ I read the title, chose the wrong VTC reason, then read the rest of the question

Wheat Wizard

You should really read the question first

PhiNotPi

@PhiNotPi Might be miss-remembering, site analytics says we have about the same activity level as in spring 2016.

Riker

you got reasonably close tho

PhiNotPi

Idea: someone take the site analytics data here and run a fourier transform on it.

Zacharý

1:31 AM

@NewMainPosts ...

Conor O'Brien

fun fact: if you order the first N^2 natural numbers in an NxN matrix, the determinant of that matrix is 0, for N > 2

Zacharý

I've tested that before, ^

Conor O'Brien

CMC: given N, output the matrix described ^^

PhiNotPi

@ConorO'Brien This makes sense once I think about it.

Conor O'Brien

(you may choose any offset, e.g., natural numbers - 1)

@PhiNotPi Does it? I couldn't wrap my head around why it works only for N > 2.

(other than verification of course :P)

user202729

1:42 AM

Rs probably?

If you understand it as the volume of the nD volume, it's easy to understand.

Because they're all collinear...

Conor O'Brien

of the what now

HyperNeutrino

@Dennis Yay thanks! :D

user202729

No, need ²Rs.

PhiNotPi

@ConorO'Brien Here's the way I think about it: look at the differences between the rows: all rows have the same difference from the previous one to the next one. And it's important to remember a matrix being the coefficients to a set of linear equations.

If I do the multiplication of M*a = b, the difference between rows in the column vector b is also constant.

Once you know the first 2 values of b, then the rest are determined.

This means that the systems of linear equations aren't all independent, so the matrix must have determinant of 0.

Anonymous

@ConorO'Brien Each row after the second can be written as r_i = N*r_1 + r_(i-1) (where r_1 is the first row). Thus, the rows are not linearly independent, so the determinant is 0. It works out for the N = 2 case because there are only two rows, and a 2x2 matrix is linearly independent iff one row or column is not a multiple of the other.

Anonymous

1:59 AM

In general: a matrix has determinant zero if the rows (or columns) are not linearly independent. A set of rows (or columns) is not linearly independent if one row (or column) can be written as a linear combination (adding multiples) of the others.

Pavel

I leave TNB 10 hours ago, as Mego is explaining matricies. I come back, and Mego is still explaining matrices :P

Anonymous

This is my life

2

mudkip201

@Mego That doesn't seem right as an explanation. Consider the 3x3 matrix: [[1,2,3],[4,5,6],[7,8,9]]. You're saying that [7,8,9]=3*[1,2,3]+[4,5,6]=[7,11,15]

user202729

And it has zero determinant.

mudkip201

Otoh, from what I can tell, r_i=2*r_(i-1)-r_(i-2)

user202729

2:02 AM

...? 2*(4,5,6) - (1,2,3) = (7,8,9).

mudkip201

Which, now that I think about it, makes perfect sense, as r_(i-1)=r_(i-2)+N

So, yes, the determinant is 0 for any N>2

Anonymous

@mudkip201 Err, yeah, I messed up my math

Anonymous

Story of my life

mudkip201

lol

Anonymous

@PhiNotPi I did it but I realized that I know so little about Fourier transforms and frequency domains that I don't know what I'm looking at

PhiNotPi

2:06 AM

What are the results?

mudkip201

That cat has some serious periodic components

ofc

Anonymous

@PhiNotPi Incomprehensible and long (since I did all activity since the start of the public beta)

Anonymous

The analytics page has a CSV download link, and it's easy to plug the information into the mathematical toolset of your choice

PhiNotPi

@Mego Basically, take the most recent 2^n days of data (for as big n as you wish), and plot the absolute values of the complex numbers you get out.

The complex values are in order from lowest to highest frequency (linear scale).

You might need to get rid of the first data point in the fourier transform to get a nice graph.

Anonymous

I'll let you do it, since you know what you're doing :)

PhiNotPi

2:14 AM

I'll do it sometime later.

Pavel

3:37 AM

Oracle is having the internet decide what to rename Java SE to.

Java McJavaface was explicitly banned.

PhiNotPi

docs.google.com/forms/d/e/…

This is the official poll.

Magic Octopus Urn

AvajMcAvajface

PhiNotPi

Also those two choices are pretty bad.

"Jakarta EE" is okay, "Enterprise Profile" is literally meaningless.

Magic Octopus Urn

Maybe rename it to "Ol' Musky - Literally nobody calls me Java (tm)."

You

Hi

PhiNotPi

3:42 AM

Also, are we sure that Indonesia likes having so many programming languages named after it?

Anonymous

"Proud to be the Third-Worst Programming Language"

You

Call it 'Sea'

'Cause, you know

Java Sea

The Java Sea (Indonesian: Laut Jawa) is an extensive shallow sea on the Sunda Shelf. It lies between the Indonesian islands of Borneo to the north, Java to the south, Sumatra to the west, and Sulawesi to the east. Karimata Strait to its northwest links it to the South China Sea. == Geography == The Java Sea covers the southern section of the 1,790,000 km2 (690,000 sq mi) Sunda Shelf. A shallow sea, it has a mean depth of 46 m (151 ft). It measures about 1,600 km (990 mi) east-west by 380 km (240 mi) north-south and occupies a total surface area of 320,000 km2 (120,000 sq mi). It formed as...

:P

PhiNotPi

Oooh I think it might be possible to add Element to the giant polyglot challenge.

I'd have to think of something, but as of right now the polyglot code produces no output or errors when run in Element.

Actually maybe not.

Maybe the interpreter just like silently failing.

user202729

4:00 AM

About this challenge...

I didn't find any particular one, but it can be considered a dupe of another kolmogorov-complexity challenge.

What should I do with it?

PhiNotPi

Most kolmogorov complexity challenges are closed as dupes of codegolf.stackexchange.com/questions/6043/…

Oh, even better: codegolf.stackexchange.com/questions/9037/…

user202729

... this one is dict lookup.

from string to string.

PhiNotPi

I don't really think going from an array (the Pokemon challenge) to a dict will change much.

Magic Octopus Urn

4:22 AM

Something like, "output the first word with the given substring in the following dictionary."

But still no, doubt it.

You

4:39 AM

I'm making a challenge about Roman pronunciation of Korean

and its PAINFUL

I didn't even have lunch yet

and its 1:40 here

Pavel

4:51 AM

@Mego I know you mean PHP and JS, but I feel like SQL doesn't get enough hate

Also, VB.NET is definitely worse.

DLosc

Ahem.

Anonymous

5:06 AM

@DLosc TIO when :P

Pavel

@DLosc I was only counting langs people actually use

Anonymous

@Pavel I appreciate the fact that you knew exactly which two I meant :)

DLosc

@Pavel Like the US Department of Veterans Affairs, GE Healthcare, and the Bank of England? :P

Anonymous

@DLosc That explains so much about the VA

PhiNotPi

@Mego Right behind Python and CoffeeScript.

DLosc

5:18 AM

Also several PPCG users, apparently. If you need a program to save the world in 30 characters using a really old computer, MUMPS is the right tool for the job.

@PhiNotPi Hey now. :) It's okay if you don't like Python, but how is Python worse than PHP?

PhiNotPi

PHP is #0 on the list.

DLosc

Ah, okay. ^_^

Anonymous

I just don't understand how people intentionally made something so terrible

DLosc

... Which language are you referring to?

Magic Octopus Urn

CMC&R: Find 2-10 bytes that output a sequence from OEIS in any esolang, then shuffle them however you want, posting with the language.. Robbers, respond with the OEIS.

user202729

5:25 AM

... Chat mini cops-and-robbers?

Magic Octopus Urn

Apparently so.

user202729

OEIS has so many sequences, any permutation that output a sequence is likely to be on OEIS.

PhiNotPi

What would it take to get a PPCG-made language onto the TIOBE list?

New Main Posts

1

Q: Romanize Korean

Yes, It's basically You're a Romanizer, Baby, but harder. like, way harder. Learning Korean is HARD. at least for a person outside Asia. But they at least have the chance to learn, right? What you must do You will be given a Korean Statement. For example, 안녕하세요. You must convert the input ...

code-golf natural-language

DLosc

@user202729 So that's part of the challenge, then: finding bytes that can only be reshuffled into the intended program.

user202729

5:27 AM

And what's the list?

Magic Octopus Urn

Lol why can't I edit that now, I want to add "you must also post a subset of 4 of the first 10 results"

Any subset of the first 10

user202729

Language popularity? Where is the about page? / Nevermind, found it: tiobe.com/tiobe-index/programming-languages-definition

PhiNotPi

tiobe.com/tiobe-index/

user202729

Jelly has 3 results.

DLosc

@PhiNotPi It would have to be really good for some application that becomes suddenly popular.

user202729

5:30 AM

If everyone on PPCG write "Jelly programming language" instead of "Jelly" in the title it would had been much more results.

DLosc

[tag:status-declined]
Too many bytes

user202729

Also, we need a Wikipedia entry.

PhiNotPi

@DLosc But if PHP did it why can't we?

user202729

And about 3470 more hits.

PhiNotPi

I think we could do it. We just need to be dedicated.

user202729

5:34 AM

I think we already have more than 3470 answers in Jelly.

No, just 3264.

And some of them are questions.

... just need 200 more. That can be pastebin spam.

And some edit to add the substring "Jelly programming" to them. (because the query format)

PhiNotPi

Maybe we could promote our language by making like a cheaper version of the RaspPi, distributing them to third-world countries to encourage people to learn programming, but with the twist that it runs on Brain-Flak.

Or maybe make a phone called the Lexip which runs on a CJam-based operating system.

Or maybe I could make a considerable donation to a politician to add Pyth to my state's education standards.

DLosc

@PhiNotPi s/Brain-Flak/Cogol/

PhiNotPi

As you can tell, these are all very economical.

Well, maybe the phone idea will pay for itself.

user202729

Given that (most) students can't understand what we considered trivial to understand, they will disagree.

DLosc

@PhiNotPi Well, evidently, you don't have to be perfect to become popular. (And PHP underscores my point: it was a tool for website programming at a time when the web was the Next Big Thing. Of course tons of people jumped on the bandwagon.)

DLosc

6:03 AM

I got lazy evaluation working in Appleseed, and it's beautiful :D

asl> (1to 10)
(1 2 3 4 5 6 7 8 9 10)
asl> (1to)
(1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 ...)
asl> (map square (1to))
(1 4 9 16 25 36 49 64 81 100 121 144 169 196 225 256 289 324 361 400 441 ...)
asl> (filter even? (1to))
(2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 ...)

PhiNotPi

What's Appleseed?

Anonymous

@PhiNotPi Some dude name Johnny planted them all over America

DLosc

@PhiNotPi It's tinylisp, but extended into a (somewhat) practical language. Just a seedling at the moment.

@Mego Well, the northern part of the Ohio River valley, anyway.

Pavel

6:20 AM

in talk.tryitonline.net, 1 min ago, by Pavel

@Dennis Can you add MUMPS?

DLosc

Hahahaha

Pavel

6:32 AM

I'm surprised no one's talking about the Olympics

PhiNotPi

6:45 AM

I'm tabbing between TNB and online biochem notes.

PhiNotPi

6:57 AM

TIL there's a lot more BASIC dialects than I thought: en.wikipedia.org/wiki/List_of_BASIC_dialects

DLosc

Wow, that's more than I thought too.

PhiNotPi

Are there any PPCG languages that have a wikipedia article?

DJMcMayhem

BrainFlak was mentioned on Wikipedia for a while before being edited out

Pavel

7:20 AM

@DJMcMayhem D: why

@PhiNotPi Who even studies on Fridays just cram everything in on Sunday

DLosc

So, I've got a naming dilemma. I wrote two different functions for the Appleseed library that do partial application in different ways, and I'm not sure what's the best way to disambiguate their names. (Initially, I called one of them curry, until I learned that currying != partial application.)

One of them works with fixed-arity functions and allows you to fix values for arbitrary parameters: (partial mod ? 10) returns a function that takes its argument mod 10.

The other only allows you to fix values for the argument(s) at the beginning of the arglist, but it can work with variadic functions too: (partial' - n 1) returns a function that computes n minus 1 minus all its args.

Any thoughts on naming these two? (Besides partial and partial', which isn't really helpful in distinguishing them.)

Potato44

7:37 AM

@DLosc the second one basically acts as a special case of the first unless there are varargs involved, right? so what about the name varpartial (capitalised however the convention is).

or partialvararg

DLosc

@Potato44 That's an idea--I'd probably call it variadic-partial.

I think I like that. It implies that 1) the non-variadic partial is the one you should usually use, all things being equal; 2) you can & should use variadic-partial with variadic functions; 3) variadic-partial returns a variadic function, while partial returns a fixed-arity function. And all of those are statements I agree with.

Thanks!

Best of PPCG 2017

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