The Nineteenth Byte

Mr. Xcoder

21:00

It constitutes Targeted voting if you are upvoting for the user, not for the content. That's forbidden all across SE.

@HyperNeutrino Well it's 12012

Magic Octopus Urn

@Mr.Xcoder Ahhh... Lol, I just realized, I've never read the SE rules, only the PPCGSE rules.

I always assume site-wide rules are usually common sense.

Mr. Xcoder

Mine is 59487 or 59478, I think

HyperNeutrino

68947 is mine I think (nope, 68942)

Magic Octopus Urn

Wait so BOTH Mego and DJ got Mod? How's that work?

Erik the Outgolfer

there were 2 positions...

Magic Octopus Urn

21:01

Well, I mean not so much how...

HyperNeutrino

@MagicOctopusUrn 3 candidates, 2 open positions

Mr. Xcoder

I swear this sequence has already appeared.

HyperNeutrino

@Mr.Xcoder there are like 80030545398605 sequences called the exact same thing

Magic Octopus Urn

@HyperNeutrino How was it decided that we needed 2 positions, I guess would be the question, userbase size?

Mr. Xcoder

> Coefficients of ménage hit polynomials

HyperNeutrino

21:02

oeis.org/… @Mr.Xcoder

@MagicOctopusUrn hm good question, idk :P we need an even number of mods?

Mr. Xcoder

I am 100% sure I've seen this before in that challenge

Magic Octopus Urn

@HyperNeutrino It must be the same rules as TV volume, divisible by 2 or 5 or none at all.

label a -- goto a

145858 is mine? Wait, that's not from any of SE sites...

HyperNeutrino

@MagicOctopusUrn ? idk lol

label a -- goto a

I never tried to memorize a se/ppcg id because i dont have to

Mr. Xcoder

21:02

@HyperNeutrino ಠ_ಠ NJA Slone

HyperNeutrino

lol

Mr. Xcoder

Wait, what?

The description is identical, the terms are entirely different.

label a -- goto a

I haven't even remembered my bank ID nor school ID. Only ID from one game, because I had to put link to my PM page in all my forum games

HyperNeutrino

@Mr.Xcoder offset

Mr. Xcoder

Welp.

> Conjecture: 2*(-252307*n+1041077)*a(n) +(504614*n^2-3362985*n+5118150)*a(n-1) +(1280831*n^2-7397886*n+6461565)*a(n-2) +(746598*n^2-2913543*n-1336090)*a(n-3) +(-405481*n^2+6175011*n-15469320)*a(n-4) +(-375862*n^2+4098537*n-8846430)*a(n-5) +2*(-187931*n+560630)*a(n-6)=0. - R. J. Mathar, Nov 02 2015

And they rejected a simple formula of mine saying It's too complicated for a simple sequence, but they include this...

HyperNeutrino

21:05

Pfft, conciseness on the OEIS? unheard of

Mr. Xcoder

I guess our answers cannot rely on unproven conjectures by default, right?

HyperNeutrino

@cairdcoinheringaahing ^

J. Sallé

@Mr.Xcoder well, what is their definition of a simple sequence?

Maybe they don't think this specific one is simple?

Mr. Xcoder

I. have. No. Idea.

@J.Sallé This one is not simple.

But what are ménage hit polynomials?

J. Sallé

1 min ago, by Mr. Xcoder

I. have. No. Idea.

Riker

21:10

@betseg too real

label a -- goto a

we've got a lesson in Poland where you have to remember PIN's

betseg

i think this is good enough but still bad in many ways that i dont know of. i want to post it in CR but im scared ;_;

Mr. Xcoder

#define MINE 9
#define FLAG 9

Hmmm... This looks weird

betseg

one is for the actual field, one is for the mask, and both are one greater than the maximum adjacent mine count possible

Magic Octopus Urn

@labela--gotoa The only solidly impressive number I have memorized is my CC number (but that's only the case for 2 more months). The only reason I tried to do that is so I can at least order a pizza if I lose my wallet lol.

Mr. Xcoder

21:14

so we won't leak memory... except a sigkill, then rip CR won't appreciate this :P

label a -- goto a

@MagicOctopusUrn Actually the lesson is history. .-. remember dates, remember dates...

betseg

@Mr.Xcoder the wording or leaking memory? :P

because there isnt a way to prevent the latter

Mr. Xcoder

The wording :P

Magic Octopus Urn

@labela--gotoa O_o?

label a -- goto a

@MagicOctopusUrn We normally learn history at school and it's one of worst lessons...

Mr. Xcoder

21:16

@betseg Looks good to me :)

label a -- goto a

and it's basically about remembering dates...

DLosc

@HyperNeutrino Here you go! :D

Magic Octopus Urn

@labela--gotoa List of classes I failed in college: [Sociology, Some MIPS Class that 40% of Students Failed]

Mr. Xcoder

if(IS_MINE(mask[y + dy][x + dx]) != IS_MINE(field[y + dy][x + dx])) {
    // exit game
    return 1;
}

label a -- goto a

I wish I could sit at home and write code 24/h

Magic Octopus Urn

21:17

@labela--gotoa The sociology fail was because we had to literally memorize vocabulary words and regurgitate them in essay form ._.

Mr. Xcoder

perhaps you can remove those brackets?

Magic Octopus Urn

@labela--gotoa Maybe get a job programming ;{P?

label a -- goto a

@MagicOctopusUrn oh.

Mr. Xcoder

golfs some code that is not supposed to be golfed

label a -- goto a

@MagicOctopusUrn That could be my job, if I wasn't yet in school.

.-.

Magic Octopus Urn

21:19

@labela--gotoa I used to tutor for $$$, actually not terrible. Just gotta pick your clients... very well.

betseg

@Mr.Xcoder perhaps remove all whitespace and save 5429 bytes? :P

moonheart08

@Mr.Xcoder brb golfing GCC

label a -- goto a

@MagicOctopusUrn I don't think anyone would be interested in my "lessons"

peps here are really... no words to describe it

moonheart08

'smart'? :P

DLosc

@betseg Post it! Code Review is like a tetanus shot: It hurts a lot at first but in the long run it's good for you.

Erik the Outgolfer

21:22

@DLosc legendary (especially here in Greece)

Magic Octopus Urn

@DLosc Witcher quote: "The longer you practice alone, the more you ingrain your mistakes."

label a -- goto a

cmc (jk): write an algorithm that prints 1453, so I can remember that date... .-. it's repetitive... two things attached to it .-.

betseg

@DLosc lol

Erik the Outgolfer

wait, that is the date you keep forgetting? >_> end of Byzantine Empire

May 29, 1453 :P

label a -- goto a

yeah

.-.

betseg

21:25

i remember it because erdoğan repeats that at every rally ever

Erik the Outgolfer

I'm sure now you'll remember it

label a -- goto a

1+ 345.rotate

I think I got it

This is how you learn dates

Magic Octopus Urn

History was rough for me too b/c of dates. I prefer Gistory, the practice of History where you know crap has happened, but not when or any specific details.

Erik the Outgolfer

lol

@labela--gotoa except that ".reverse" is most probably easier to remember than ".rotate"

AdmBorkBork

My favorite is history that doesn't line up in my brain right. Like, Martin Luther King, Jr. and Anne Frank were born in the same year.

label a -- goto a

21:26

@EriktheOutgolfer Oh, that would work too

Erik the Outgolfer

or even this

Magic Octopus Urn

@AdmBorkBork I... You... The... What? Wow. Okay.

Erik the Outgolfer

12345 -> 2->+: 1+345 -> reverse each: 1+543 -> 1543

dzaima

@EriktheOutgolfer except that 1543 ≠ 1453

betseg

should i include the gpl header on the snippet when posting it to CR? :P

Magic Octopus Urn

21:29

•5³• -> 1453 in 05AB1E.

Erik the Outgolfer

@dzaima well, that's as far as my memory goes, then you do -> sort: 1345 -> 3 is last: 1453

Magic Octopus Urn

Neat because the code has 145³ in it lol.

betseg

@MagicOctopusUrn •5³ also apparently

label a -- goto a

@MagicOctopusUrn I'm sure it's easier to remember the date itself than the compression algorithm to calculate it .-.

Magic Octopus Urn

@betseg Yeh, you don't need closing quotes or ending statements if your program prematurely terminates, it assumes them.

Erik the Outgolfer

21:31

@betseg only when your program ends there though

betseg

@labela--gotoa except the powers of ten :P

Magic Octopus Urn

@betseg Just like how TFTF"Hi pushes Hi to the stack 100 times. If you wanted to PRINT each "Hi" you'd need the endquote: TFTF"Hi",

label a -- goto a

gtg

betseg

bai

label a -- goto a

thanks for help :P

New Main Posts

21:33

0

Q: Want to see a Magic Card Trick?

The first magic card trick I ever learned as a child was the following: Have 1 deck of cards where the pattern on the back is not vertically symmetric. Organize all cards to be facing one direction. Ask an individual to, "pick a card, any card, memorize it and give it back to you". Proceed to p...

Adám

@labela--gotoa Maybe you can remember the word "dehi"?

betseg

adec? (every nth letter for every digit :P)

Magic Octopus Urn

@betseg That's actually not a bad idea lol. Maybe replace the first 2 digits with the letter corresponding to those two digits? 1453 -> N53?

Dunno how you'd do the months/days though...

Adám

@MagicOctopusUrn Wait, what is @labela--gotoa trying to remember?

Magic Octopus Urn

(Months-Days)/(Number of Concurrent Wars in that Year)*(The Third Letter of the Current Predominate Religion Converted to ASCII)

Adám

21:39

@MagicOctopusUrn ‽

Magic Octopus Urn

@Adám May 29, 1453 - As Erik stated, the End of the Byzantine Empire, for a history quiz.

@Adám He was complaining about how genuinely annoying history tests are because they test your ability to memorize dates, not test your knowledge of the over-arching lessons to be learned, etc... That was just a nonsense formula to "help" memorize a date lol.

@Adám I was curious, what did you mean by this anyway?

Adám

@MagicOctopusUrn Hebrew accent "dehi" is Unicode decimal 1453.

Magic Octopus Urn

@Adám Unless you're using that on the regular I doubt that'd be helpful to most ;P.

label a -- goto a

Not only dates, but also some random, not necessarily useful information + super hidden details

betseg

just remember it as -16302124800, in unix time

label a -- goto a

21:44

14:53 I'm usually home this time .-.

Magic Octopus Urn

@labela--gotoa "What color was Franz Ferdinand of Austria's favorite scarf?"

label a -- goto a

@MagicOctopusUrn, hah no :P

Magic Octopus Urn

@labela--gotoa If, after us literally discussing the number 1453 for a solid 30 minutes, you miss the answer to the end of the byzantine empire I'll be disappointed.

New Meta Posts

0

Q: Ethics around improving answers in comments

I often prefer to improve other people' answers instead of writing one of my own (unless mine would be considerably different). To be entirely honest, I do this for petty selfish reasons - to show off that I can, to avoid having to explain the answer myself, and maybe to gain some reputation. Th...

discussion

Adám

@labela--gotoa 1 + 4 = 5, 5 - 3 = 2, 3 + 2 = 5 (May) and this is so crazy, that the only proper response is "No!" in German: 9.

label a -- goto a

21:46

@MagicOctopusUrn I wouldn't be surprised if that's the only thing I'll remember :p

Adám

@MagicOctopusUrn Monochromatic magenta.

Poke

anyone into flight sims

label a -- goto a

12345.split(2).forEach(x=>x.rotate_left())

Poke

If so you may want to check yo'self rockpapershotgun.com/2018/02/19/…

Magic Octopus Urn

@Adám Monochromatic magenta? Is this a reference to something :P? Or is that a legit answer from the Archives of Adam :P?

Adám

21:55

@MagicOctopusUrn Let me give you a hint: If I ever get a magnetic monopole, I'll paint it monochromatic magenta.

Magic Octopus Urn

@Adám Oh... yeah, I'm dumb. Haven't used the word "monochromatic" in quite the long time.

betseg

@betseg i.imgur.com/RW5BWsh.png shouldve posted a few hours ago :P

Magic Octopus Urn

Can you make Piet programs using paint?

Erik the Outgolfer

yes I think so? but I think colors have to be exact

ASCII-only

@EriktheOutgolfer obviously :P

Magic Octopus Urn

21:59

@Adám Also thanks for getting me to the wikipedia page on magnets, RIP the next 30 minutes of my life in a good way. I'm like three links deep >_> en.wikipedia.org/wiki/Curie_temperature

DJMcMayhem

Because I was busy earlier, I haven't actually seen my name in blue yet.

Ah there it is. Nice :)

Magic Octopus Urn

@DJMcMayhem Gratz!

J. Sallé

@MagicOctopusUrn the good old wikipedia vortex; you start reading about magnets, suddenly it's been 4 hours and you're reading about Finnish death metal of the early 90s

Riker

@DJMcMayhem :D nice!

@MagicOctopusUrn yes as long as you turn off anti-aliasing and only click pixel by pixel

Magic Octopus Urn

@J.Sallé Finnish Death Metal you say ( ͡° ͜ʖ ͡°)?

4 hours later I'm back to magnets

moonheart08

22:03

@J.Sallé i thik you're describing TVTropes

mudkip201

@moonheart08 ಠ_ಠ

moonheart08

Totally not trying to trap everyone or anything

mudkip201

lol

Riker

thanks, google: gives me the plot of the matrix (movie) for "matrix plot"

>.>

mudkip201

lel

Erik the Outgolfer

22:06

cs.mcgill.ca/~rwest/wikispeedia

J. Sallé

@MagicOctopusUrn precisely

ASCII-only

@Riker wel... what do you expect

Magic Octopus Urn

@J.Sallé 17 years later +2hours I'm in the middle of the hellish cyclical loop that is Wikipedian Finnish ferromagnetic death metal.

ASCII-only

@EriktheOutgolfer wow such a ripoff

moonheart08

18 years later you're at the wikipedia page describing you and your wikipedia adventure

Erik the Outgolfer

22:08

the other one is under maintenance though

Magic Octopus Urn

@EriktheOutgolfer it makes me happy that this may have been a professor's assignment to his/her students at some point lol.

@moonheart08 That'd be so friggen' meta...l

J. Sallé

@MagicOctopusUrn That sounds strangely appealing. I need to listen to some of that now

Magic Octopus Urn

@J.Sallé Anywhere remotely non-american + the words "death metal" basically have me thinking of Toki from DeathKlok immediately lol.

I never watched the show, just the way he talked had me loling sometimes.

J. Sallé

@MagicOctopusUrn Hah! Toki's a great character

Magic Octopus Urn

@J.Sallé You're nots just sayings that are yous?

J. Sallé

22:17

@MagicOctopusUrn totes nots

Magic Octopus Urn

Inb4 DJMcMayhem comes back in here and his eyes are immediately drawn to the only bolded text in the whole channel... Wikipedian Finnish ferromagnetic death metal?!?! I literally don't think we could get more off-topic lmao.

Adám

Searching "ferromagnetic death metal" yields things about removing metal items before MRI. Now I cannot unsee that.

J. Sallé

@Adám oh god ಠ_ಠ

moonheart08

ಠ_ಠ

Riker

@MagicOctopusUrn ty

Magic Octopus Urn

22:30

@Riker Fair enough.

@Riker Still was an interesting read on why that's the fact though haha.

Riker

^

moonheart08

http://en.cppreference.com/w/cpp/language/constraints

My savior has come

Oh, and more opprotunities for compile time template code

lul

J. Sallé

:42971092 I almost got that one but the Ç was in the wrong spot >.>

Adám

@J.Sallé The markdown is messing me up. Hang on.

Preparing for next webinar:

CMC:

[["·abcdefghijklmnopqrçtuvwxy","·ä·············ö···s·ü····"],["-ABCDEFGHIJKLMNO‌PQRÇTUVWXY","·Ä·············Ö···S·Ü····"]]

(where · indicates a space)

Easier to visualise with the default APL output:

 abcdefghijklmnopqrçtuvwxy
 ä             ö   s ü

-ABCDEFGHIJKLMNOPQRÇTUVWXY
 Ä             Ö   S Ü

J. Sallé

I see it now, but why is Ç in S's place?

Adám

22:45

@J.Sallé It's a placeholder for ß/ẞ.

J. Sallé

@Adám Ah, I see

ASCII-only

@Adám :|

Adám

@ASCII-only Why the frown?

ASCII-only

> placeholder

Adám

@ASCII-only I need it because I'm doing successive replacements with ß → sç and ẞ → SÇ. If I used the proper characters, the replacements would keep expanding forever.

DJMcMayhem

22:55

@Adám Why no z?

Adám

@DJMcMayhem Because typos :-(

DJMcMayhem

Should I do 'z' if I answer it?

Adám

@DJMcMayhem Yes. (Where is the CMC sandbox?)

J. Sallé

@Adám this makes me really want ⍳'z' to work >.>

Adám

@J.Sallé 819⌶⎕A?

J. Sallé

22:57

@Adám yeah but ⍳'z' is 2 bytes shorter :p

DJMcMayhem

Also, why the dash on the uppercase but space on the lowercase?

Adám

@DJMcMayhem That's intentional. It means that spaces and dashes initially sort identically and only if we need to tie-break, then dashes come after spaces.

DJMcMayhem

V, 30 bytes: i-¬AZ\n Ä±³ Ö³ S ÜkhhrÇäGVjur

Adám

@DJMcMayhem All of this is really a left argument to APL's ⍋ function which sorts with a custom alphabet. Each dimension in the alphabet indicates another level of sorting. So initially, aäAÄ all sort the same, but then if we need to tie-break, a and ä precede A and Ä, and only then do we tie-break by letting a precede ä and A precede Ä.

@DJMcMayhem Isn't that a 4×27 table?

@DJMcMayhem 30 bytes or chars?

DJMcMayhem

Bytes. (The code in my message is slightly different cause of markdown)

@Adám Yes. Is that a problem?

Adám

23:05

@DJMcMayhem Yes, look at the "CMC" line. It's a 2×2×27 array. APL indicates the two separate layers with an empty line.

DJMcMayhem

V doesn't really have arrays. Is a blank line in the middle good enough?

Adám

@DJMcMayhem OK then.

DJMcMayhem

31 bytes

Adám

@DJMcMayhem Neat. So V's character set has all those chars? Good thing I didn't use ß and ẞ, eh?

DJMcMayhem

Haha. V has ß but not ẞ

V's code page

Adám

23:11

@DJMcMayhem I don't think any character set has ẞ. It isn't even properly supported by Unicode: It lower-folds to ß, but ß doesn't upper-fold to ẞ.

DJMcMayhem

Strangely enough, ẞ to lower is ß, but ß to upper is SS in V

totallyhuman

python does that

Adám

9

Q: Case-fold German

Given a German string and an indication of a case (lower/upper/title), fold the string to that case. Specifications Input will consist only of a–z plus äöüß-,.;:!?'" in uppercase and/or lowercase. The target case may be taken as any three unique values (please specify what they are) of a consi...

code-golf string natural-language alphabet text-processing

Pavel

@Adám I think C# does that if you set Culture to German.

Adám

@Pavel I doubt it, but would love to have it verified.

Pavel

23:15

I'm not sure though, C# Culture always seems to affect only the stuff you don't want it to affect.

Adám

@Pavel It appears not. (⎕NEW String(⊂,'ß')).ToUpper⊂⎕NEW Globalization.CultureInfo(⊂'de-DE') gives me ß.

Pavel

It does do things, like, remove the dot off of I sometimes

And make int.Parse swap the meaning of . and , which is particularly annoying if you're storing a CSV of floats.

Adám

@Pavel Yes, (⎕NEW String(⊂,'i')).ToUpper⊂⎕NEW Globalization.CultureInfo(⊂'tr-TR') gives me İ.

Pavel

On the other hand, things like string.Equals will consider ß and ss to be the same with de-DE culture.

Downgoat

@DJMcMayhem could you unfreeze VSL room: chat.stackexchange.com/rooms/46888/vsl

Adám

23:29

@Pavel I don't know enough .NET to try that. Maybe after tomorrow's lesson you'll be able to.

DJMcMayhem

@Downgoat Done. I've never done that before :D

Pavel

@Adám How do you call .NET functions in Dyalog with 3 arguments?

Adám

@Pavel Notice the ⊂s ? That's because it has to be a single argument. Multiple arguments would just be a vector of arguments.

@Pavel E.g. inst←⎕NEW SomeObject(arg1 arg2 arg3) or inst.Function arg1 arg2 arg3

Downgoat

@ASCII-only can you come into VSL room have design question now that working on backend

Pavel

@Adám String.Equals(⊂,'ß' ⊂'ss' StringComparison.CurrentCulture) in that case

I think

Or InvariantCulture

Or C#

Adám

23:37

@Pavel String.Equals (,'ß') 'ss' StringComparison.CurrentCulture indeed returns 1.

@Pavel C# requires so much boilerplate and extra syntax (parens and semicolons and commas…) Much easier to write the equivalent Dyalog APL. Wonder if there is anything that can be done in C# which cannot be easier done in Dyalog APL.

Pavel

@Adám Hmm... async/await?

@Adám Do you know what your CultureInfo.CurrentCulture is? On TIO it's en-US.

Adám

@Pavel I have en-US on my local machine too.

@Pavel Dunno. Show me!

ASCII-only

oh yeah @Downgoat how do you feel about you and Chatgoat being sacrificed to the mods

Adám

@Pavel Equivalent APL.

ASCII-only

@J.Sallé oh yes I should really (try to) fix everything that's broken on it sometime soon

Pavel

23:45

@Adám tio.run/…

ASCII-only

@Fatalize You mean 6-8 weeks after we have 6-8 mods (as in not a guarantee until we get our 8th mod)

@Adám like Charcoal :P

Downgoat

@ASCII-only what

ASCII-only

4 hours ago, by Martin Ender

@Mego @DJMcMayhem Welcome aboard! :) We're getting the goats ready for the inauguration ritual.

New Main Posts

0

Q: Regex for multiples of 9

It is easy to describe a finite state machine that recognizes multiples of 9: keep track of the digit sum (mod 9) and add whatever digit is accepted next. Such a FSM has only 9 states, very simple! By the equivalence between FSM-recognizability and regular languages, there is a regular expression...

code-golf regular-expression

Adám

@Pavel Sorry, I don't know enough to copy that. But Dyalog APL can certainly spin up parallel threads and have them await each others' completion. For things where performance isn't an issue, it is extremely easy using APL threads (where APL slices the time of a single CPU thread), but the isolate workspace makes it quite easy to do even proper CPU threads.

Pavel

23:54

@Adám Here's a better example:

tio.run/…

ASCII-only

@Pavel argh comment overload

Pavel

@ASCII-only I'll admit return 4; //return 4 was a bit much

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