The Nineteenth Byte

There's an App SE Site for that code-golfkolmogorov-complexityinternetstack-exchange-apifile-system Oftentimes, when searching through StackExchange, I find myself seeking to post a question about something or another, but not knowing where to post it. That's where you come in. The Challenge ...

Hold the phone.

¯\_(ツ)_/¯ <-- star this for science?

6

Digital Trauma

@MartinBüttner Ok. Then I'm struggling figuring out how to get a simple count of characters using $#1

Calvin's Hobbies

Mini-challenge: post the best Calvin and Hobbes strip

RikerW

12:49 AM

Just found an old word CAPTCHA, and the text was "alex wrong". :P

Really.

Calvin's Hobbies

@RikerW Good start

Anonymous

Literally first google image result for "calvin and hobbes best strip"

Anonymous

You can't argue with Google

12:53 AM

These are all good

Anonymous

The original ELIC:

2

Calvin's Hobbies

But maybe we should stop dominating chat with them :P

RikerW

12:54 AM

^

To the sandbox!

Ampora

I like how the front page has 3 out of 6 top network users from PPCG, and that the number 1 top network user has a profile pic of the "graduated" PPCG upvote.

randomra

@Dennis why did you choose 1-based indexing for Jelly?

my best CH strip is RikerW's first one too

the second is:

Dennis

1:15 AM

@randomra Because 0 is falsy. For example, my indexOf function returns 0 if a list doesn't contain an element, which is a valid falsy output.

RikerW

PPCG is like the only place where new questions get upvoted so fast.

And a couple other betas, but not other places.

RikerW

1:40 AM

@CᴏɴᴏʀO'Bʀɪᴇɴ lol

@ETHproductions ^^

Cᴏɴᴏʀ O'Bʀɪᴇɴ

XD

ETHproductions

Well, I've hit #50... now on to 10k

#40 is right at 10k, that's a nice goal

Dennis

2:02 AM

@RikerW PPCG is the only SE site where questions usually aren't a cry for help. :P

Cyoce

@Dennis well there's puzzling. ¯\_(ツ)_/¯

Dennis

I'm not very familiar with Puzzling. Do you actually have to know the answer to post a puzzle?

Calvin's Hobbies

No (I think)

ETHproductions

@Doorknob [citation-needed]

TanMath

@Dennis lili,\>0e= doesn't work for the zeros in interval challenge.

Dennis

2:09 AM

That's because 0 is a number, not a character. You want '0.

TanMath

@Dennis still doesn't work...

i thought the range list has integers as the elements...

Dennis

Ah you also have to cast the range to a string with s.

That appears to be new.

ETHproductions

I noticed that two days ago and didn't think much of it

TanMath

@Dennis why?

Why can't I just look for 0 as an integer?

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

Monophonic Pitch Detection Tags: code-challenge test-battery Sandbox Notes Still in progress. I haven't made any of the test cases or snippets yet. This is intended to be an easier and more accessible alternative to Polyphonic Pitch Detection. Take an array of samples, and output the freq...

Dennis

2:14 AM

@TanMath Because [10] contains neither the number 0 or the number 1.

TanMath

@Dennis oh...yeah...

Cyoce

TanMath

@Dennis thanks for helping me write my first CJam answer!

I will post it

Dennis

You don't need the backslash btw.

TanMath

where?

Dennis

2:18 AM

,\>

TanMath

@Dennis thanks!

@Dennis here is the link!:

0

A: Zeroes in interval

CJam, 12 bytes lili),>s'0e= Nice and short! Works like @Mego's Seriously answer. Had fun writing my first CJam answer! Try it here!

Lol...all fits in the onebox!

Dennis

You can shorten lili to q~.

TanMath

Really?

Can you tell me what that means?

Dennis

q reads the entire input and ~ evaluates.

TanMath

Ok...thanks!

BtW, is there a jelly tutorial?

Dennis

2:29 AM

There's an overview of the atoms, but everything else is still undocumented.

TanMath

ok...

I want to learn jelly so I will try...

@Dennis will this work in CJam for the trick ThomasKwa does?: li!

ETHproductions

Undocumented languages are always fun to try

Dennis

@TanMath You should start with APL or J to understand trains.

TanMath

@Dennis ok...

Dennis

@TanMath Yes, that works.

TanMath

2:33 AM

I just thought, would printing 1 work for the challenge?

if the base is k

El'endia Starman

@FlagAsSpam Link. For future reference, there's a "hub" at play.starmaninnovations.com .

TanMath

I guess it wouldn't.

Dennis

No, it wouldn't.

TanMath

because if the input is one...

Dennis

That's not the only issue. With base k, all elements of the range (except for 1) will have a zero.

TanMath

2:35 AM

Ok...

What is the iff business?

ETHproductions

iff == if and only if

El'endia Starman

......@Mego...

Dennis

> This site requires Sun Java 6.0.0.1 (32-bit) or higher. You have Macromedia Java 7.3.8.1¾ (48-bit). Click here [link to java.com main page] to download an installer which will run fine but not really change anything.

Been there.

New Main Posts

0

Q: Find the Cross Product

The cross product of two three-dimensional vectors a and b is the unique vector c such that: c is orthogonal to both a and b The magnitude of c is equal to the area of the parallelogram formed by a and b The directions of a, b, and c, in that order, follow the right-hand rule. There are a few...

ETHproductions

Ooh boy, another mathsy question that I don't have time for tonight :(

Doorknob

2:51 AM

@Dennis Nope.

Thomas Kwa

3:03 AM

@TanMath Hah! If there were a Jelly tutorial I'd be writing everything in Jelly.

New Sandboxed Posts

3:35 AM

0

A: Sandbox for Proposed Challenges

Open the box code-golf ascii-art string Given an ASCII-art box, your program must open it: Examples ------- | | |_____| / / / / / / / | | |_____| Specification The first line will only consist of -, at least 3 of them The middle rows will start with | have s...

quartata

3:57 AM

Have we had a generate smooth numbers challenge?

Thomas Kwa

Yes

Doᴡɴɢᴏᴀᴛ

@Mods can Chatgoat's Barn be unfrozen please :3

quartata

k

Thomas Kwa

Actually, @quartata, that question has a specific input format and other restrictions. It may be worth to write a new challenge and close the other one.

Dennis

in Chatgoat's Barn, 12 secs ago, by StackExchange

Dennis has unfrozen this room.

Doᴡɴɢᴏᴀᴛ

4:01 AM

@Dennis :D thanks

Alex A.

> Ninja'd — Dennis ◊, 12 seconds ago

Dennis

Wrong diamond is wrong.

quartata

@ThomasKwa I don't remember what our meta policy on dupe closing old questions is but maybe

Dennis

15

A: Should "Code the Huffman!" remain closed as a duplicate of a very old question?

TL;DR: They are duplicates. Close the old one. First, I'd like to clarify that I do think the questions are duplicates. I agree with Peter that a difference in the output format counts as a "minor modification" to existing answers, unless the output formatting is the core of the challenge (which...

Alex A.

@Dennis But it's sooooo easy to type on my keyboard and I'm sooooooo lazy

Dennis

4:04 AM

♦_♦

quartata

ah that's the post I was looking for

(╯°□°）╯︵ ♦

thanks

good night ya'll

@Doorknob Angrily tossing me a diamond?

Doorknob

4:09 AM

♦ ︵ ¯\_(ツ)_/¯ ︵ ♦

I hate it when my bidiurnal thing schedules a challenge on weekends

... which happens every week, actually -_-

quintopia

what is your bidaily thing?

Doorknob

Dec 31 '15 at 23:53, by Doorknob 冰

New Year's Resolution: one challenge every two days. :P

quartata

You know that means you'll get Socratic by the end of the year

Doorknob

In a month, actually

15 questions to go

quartata

You'll get to join Calvin

Doorknob

4:14 AM

Martin too, no?

quartata

Nope

Doorknob

Yes

As of... wow, yesterday.

Congrats on the Socratic @MartinBüttner \o/

4

quartata

Oh wow.

Now all he's missing is Steward :P

Oh I forgot about Constable

He'll get that soon

Doorknob

What about Marshal?

(Literally impossible for him to get right now. :P)

quartata

I think he has that

Doorknob

4:16 AM

Nobody has that

^

? really

Yeah

@ProgramFOX is closest, with 430/500 helpful flags

quartata

Oh he has Deputy

That's what I was thinking of

Alex A.

4:19 AM

> Here is Bill Jones' solution in APL. I found it amusing that he sent me this by e-mail even with the difficulty of transliteration and the fact that his office is across the hall from mine.

Doorknob

wat

Oh, you're researching for the cross product challenge, aren't you. :P

Alex A.

Yeah, I wanted to see how to do it in APL. I found APL idioms for it but I'm not going to copy them.

I just found that quote hilarious.

quartata

No one has Illuminator either

ՊՓԼՃՐՊՃՈԲՍԼ

Hey guys, I have added a Scrabble Dictionary to ESMin!

Doᴡɴɢᴏᴀᴛ

Can someone come into chatgoat's barn. type /start and try to have a conversation with chatgoat?

Chatgoat's Barn

PLEASE TALK TO CHATGOAT. I PROMISE HE'S SMART. jsfiddle.net/Lk...

ՊՓԼՃՐՊՃՈԲՍԼ

4:23 AM

One step closer to Mathematica!

Using the dictionary, I can write hello world as ɖꞒ↷+⬭+ɖꞒ㘯!

Doorknob

@ՊՓԼՃՐՊՃՈԲՍԼ Have fun with the next sixty thousand steps

:P

ՊՓԼՃՐՊՃՈԲՍԼ

@Doorknob Hey I'm getting somewhere :P

Doorknob

On an unrelated note, the only Best Of category that still has an uncertain result is Rookie of the Year, with two entries tied for first. I haven't voted for either of them yet. Hmm...

Alex A.

Pick whichever @quartata didn't post.

quartata

Wait there's a tie? I checked a couple hours ago and I was ahead by 3 votes

not like I am happy about that

Doorknob

4:28 AM

Yep, 16 to 16

Nathan Merrill

lots of answers on the "Who are you?"

oooh, I haven't voted on Best of

(except for 1 question)

maybe I can make some more ties

quartata

how about breaking some

feersum

It would have been a lot more interesting to do an N-dimensional cross product.

quartata

I'm still surprised Retina is winning golfing lang by such a landslide

Doorknob

in Tavern on the Meta on Meta Stack Exchange Chat, 1 min ago, by Jason C

Nathan Merrill

4:41 AM

Retina is unique

Doᴡɴɢᴏᴀᴛ

in Chatgoat's Barn, 1 min ago, by Uᴘɢᴏᴀᴛ

@Doᴡɴɢᴏᴀᴛ <Chatgoat> I'm sorry Doᴡɴɢᴏᴀᴛ. I'm afraid I can't let you do that.

I don't remember giving Chatgoat that functionality

PhiNotPi

CSᵠ

regexcrossword.com

8

Alex A.

5:05 AM

@Dennis Thanks for fixing the permalink!

Thomas Kwa

@feersum Cross product is only well defined for 1, 3, and 7 dimensions.

I don't remember why, but I think you'll find the reason if you search the transcript.

Dennis

@AlexA. np

Alex A.

Holy crap, APL quine: 1⌽22⍴11⍴'''1⌽22⍴11⍴'''

Well, sort of. It evaluates to itself.

Thomas Kwa

5:38 AM

I think I'll have a golfing-language-themed series of challenges.

Dennis

@AlexA. Quines with the ngn/apl demo. Post it, post it, post it!

Thomas Kwa

Not golfing language specifically, but languages that are popular here and aren't in the real world.

Alex A.

@Dennis Is that legit? Does ngn print the result to STDOUT?

Dennis

It's an online interpreter. It doesn't have STDOUT.

And traditional APL flavors do not have full programs.

Alex A.

¯\_(ツ)_/¯ Okay, if it's legit then I'll post it

Zgarb

5:43 AM

Damn mobile fonts. Your quine is full of white boxes...

Strangely, the shrug emoticon shows up fine.

Dennis

@Zgarb no boxes (hopefully)

Zgarb

That works! I forgot tryAPL has custom fonts.

Off to sleep ->

Me too. Good night!

Good night!

gnight

5:59 AM

@ThomasKwa Maybe that's for some different generalization of cross product than I was thinking of.

I was thinking of having N-1 vectors and getting a perpendicular vector

I think the unit vector determinant trick works for different dimensions

For sure it works for 2 lol

Alex A.

@Dennis As requested, posted.

Cyoce

6:26 AM

What aren't I getting here?

zyabin101

@Cyoce I clearly see you are cheating.

Cyoce

That was only after something that seemed perfectly valid didnt work

zyabin101

Did you press "Validate"?

Cyoce

yes

Sp3000

@Cyoce First column is negated char class

Cyoce

6:29 AM

that's why the "validate" button is red

@Sp3000 which is why the first column does not contain the chars S P E A K

Sp3000

P

Cyoce

oh I see

I forgot the $^ in my regex test

aaaaaaaaaaaaaaaaaaaaaaaa

Thanks and this conversation never happened

zyabin101

6:42 AM

@CSᵠ Finished the tutorial!

Also, Hi.

@Cyoce which is your player ID on Regex Crossword?

Cyoce

22904

are you gonna hack me now? : (

zyabin101

Solved all nine puzzles of the tutorial, looking forward for beginner puzzles.

Mine is 22925

Cyoce

same

there's a huge gap between tutorial and beginner

CSᵠ

(NONE){0}

Cyoce

== .* ?

mınxomaτ

7:08 AM

Isn't this technically a loophole: codegolf.stackexchange.com/a/70501/42643 ?

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

Inverse N-Bonacci In his Print the N-Bonacci Sequence, @DJMcGoathem describes the N-bonacci sequence: a sequence in which instead of summing the previous two numbers like the traditional Fibonacci sequence (said to also be "duonacci"), you sum the previous n numbers. He then asked to take two in...

Cyoce

7:23 AM

^ what do you guys think?

DJ McGoathem

My main thought is that there isn't always one and only one N-Bonacci sequence that it could be part of.

For example, 6765 is in 2 and in 6765, and possibly a bunch of others.

Oh, haha duh, I missed the "Print the lowest one" part.

What should happen if a sequence is part of no N-Bonacci sequence?

Cyoce

TBA

Open to suggestions

maybe just "assume it will be part of one"

zyabin101

@Cyoce Undefined behaviour. May do anything, crash, error, quickly weep, delete itself etc... but not print anything mistaken for a valid result.

Cyoce

@zyabin101 that sounds fine

DJ McGoathem

@zyabin101 Although, if it's truly undefined behavior, wouldn't printing something that looks like a valid result also be valid?

zyabin101

7:32 AM

@DJMcGoathem No, it would be invalid. but not print anything mistaken for a valid result.

Cyoce

added to the spec

And now for the real question: should I go to bed before midnight or watch another Arrow ?

The answer is obviously watch another Arrow

DJ McGoathem

@Cyoce #thestruggleisreal

Cyoce

@DJMcGoathem it is all to real

zyabin101

@Cyoce go to bed before midnight

Cyoce

but I'm on S3E20!

DJ McGoathem

7:38 AM

I'm already too late to go to bed before midnight, but I'm probably gonna binge watch a couple of episodes of breaking bad anyways.

zyabin101

And it's midday in Russia. So I'll stay awake for another 10 hours or so.

Cyoce

you're in russia? cool

zyabin101

@Cyoce yes

Cyoce

I'm in boring California

DJ McGoathem

I'm from here: goatshowdoc.files.wordpress.com/2012/06/maroonbells1.jpg

And very happy to be here!

zyabin101

7:45 AM

@DJMcGoathem Beautiful.

DJ McGoathem

@Cyoce this would drastically change the challenge, but another interesting way to do it would be print out all the n's where each number shows up in the N-bonacci.

So for example, an input of 5 would equal 2, 3, and 5.

Cyoce

Hmmmm.......................

I feel like in some languages/approaches this would be as easy as changing if to while, or print to return, while in other languages it would make it near impossible

DJ McGoathem

Yeah that's a good point. Although it does depend on what you're looking for. For example, a sequence can only show up one time. However, each number can show up in different places many times.

So for example, an input of 5, 9 would give 3 and 5. even though {5, 9} only appears in 5-Bonacci.

Cyoce

nah

well

I chose "stay up to twelve but stop in the middle of arrow because my wifi just dropped to 100kb/s

goodnight

zyabin101

8:24 AM

Regex Crossword stuff: I finished my tenth puzzle.

TanMath

-2

Q: Calculate the Cross Product

This challenge is very simple and I'm surprised that it hasn't been done before. You just have to calculate the cross product of two 3D input vectors. The formula for the cross product is given by: a x b = (a2*b3 - a3*b2)i + (a3*b1 - a1*b3)j + (a1*b2 - a2*b1)k where <a1, a2, a3> and <b1, b2, b3>

code-golf math linear-algebra

Obviously now a duplicate..

@Cyoce California is amazing!

@Cyoce goodnight

Martin Büttner

8:41 AM

@DigitalTrauma just add ^?

@Doorknob thanks :) ... I was hoping I'd get it with a more interesting challenge, but then I didn't wanna wait posting more challenges before I came up with something special :D

DJ McGoathem

For the purposes of that badge, what counts as "well received"?

zyabin101

@DJMcGoathem Ask @MartinBüttner. He knows about this kind of badges. He has even received the rarest badge on PPCG, Copy Editor, and he owns the only copy of that badge.

DJ McGoathem

@MartinBüttner what counts as a "Well Received" question? I'm slowly but surely on my way towards inquisitive.

ProgramFOX

9:22 AM

@DJMcGoathem A well received question is a question that's open, not deleted, and has a score > 0.

Martin Büttner

^

zyabin101

9:56 AM

@Cyoce I'm beating you in regex puzzling skills! You're 15826th place on the regex now, and I'm 13715th.

Chatgoat's Barn

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