The Nineteenth Byte

quartata

10:00 PM

He didn't say that was bad, just that using eval was wrong...

Alex A.

VoteToClose

@ev3commander (No, that's actually the "output the current time". ;))

quartata

Technically my 0-byte Rotor answer would have been valid.

Although I suppose you would have to include the byte count for the boilerplate on the input :P

El'endia Starman

There is absolutely no way I'm interpreting Minkolang with Minkolang. o.o

I mean, it's possible...

VoteToClose

@El'endiaStarman It'd be pretty easy in Vitsy. :D

ev3commander

10:01 PM

@VoteToClose Also the one about the ppcg logo

VoteToClose

'X'=([1m]

El'endia Starman

@VoteToClose Without using any self-evaluation or eval tricks?

VoteToClose

([] is if.

ev3commander

codegolf.stackexchange.com/questions/64763/… here

VoteToClose

Plus, I can make objects of instructions.

quartata

10:02 PM

@VoteToClose Still self evaluation

He wanted a full-blown interpreter.

ev3commander

@VoteToClose that link was the comment (it saves 5 bytes :D)

quartata

I'm not sure how he was going to test the answers of course...

SuperJedi224

@ev3commander Hi

VoteToClose

@quartata 'X'=([] means if 'X' do [].

ev3commander

@SuperJedi224 Hiiiii

VoteToClose

10:03 PM

That would be one part.

I would just do "m" for every instruction, map lines to it.

Pretty damn simple. xD

quartata

That's still self-evaluation.

Imagine writing it without having an interpreter, just the design.

El'endia Starman

^

VoteToClose

-.- You're not listening.

When you call 'm', you go to a line number. I'd write the interpretation according to the line number.

SuperJedi224

@ev3commander I'm currently updating the thread necromancy game leaderboard

VoteToClose

@ev3commander Nah, dude, that's perfect. :D

quartata

10:05 PM

Oh, I see.

The challenge is still strange though because in most languages it would just be if char equal to this do this char

It was flawed because it couldn't be stand-alone

Anyways...

2

A: Sandbox for Proposed Challenges

Grocery Store Micromanagement You are an employee at the hip new grocery store Half Foods, and it's the day before Thanksgiving. Since the store will be packed with customers rushing to get their turkeys, pumpkin pies and/or lentil loaves, the store needs a traffic manager to send everyone to th...

THOUGHTS

PLS

flawr

DONT THINK

SuperJedi224

Animusic - Future Retro

►

quartata

@flawr THANKS

SuperJedi224

@quartata That's an interesting name for a grocery store

Alex A.

> Half Foods

lal

quartata

10:09 PM

@SuperJedi224 Yes.

@AlexA. I also included a vegetarian-sensitive Thanksgiving option just for you <3

Alex A.

<3<3<3

flawr

@quartata Your challenge has an error, it is already after thanksgiving.

quartata

@flawr Yeah, I know..

flawr

@AlexA. You are veggie?

quartata

Just pretend we're back in time.

Alex A.

10:10 PM

@flawr Yes

Maltysen

combine your challenge with the time travel one

El'endia Starman

@SuperJedi224 Animusic is incredible.

SuperJedi224

@El'endiaStarman Yes it is.

flawr

What the hell is wrong today, I think I was the first to answer this challenge but did not get any votes so far =(

Anonymous

I fixed permalinks... Now I get to go back and redo all of them on all of my answers

El'endia Starman

10:12 PM

@quartata Add another example that shows what happens to the (currently last) example?

flawr

Does anyone object to posting this challenge?

Anonymous

@flawr gopher it

flawr

Good.

Thanks=)

Mr. Sad/angry penguin.

quartata

@El'endiaStarman OK

Alex A.

@flawr No objections here

quartata

10:14 PM

@El'endiaStarman done

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@Calvin'sHobbies Danke!

Optimizer

are we really bowing down to this communism of banning stealth pings???

quartata

Added another one

@Optimizer I know you're joking, but stealth pings have officially gone beyond the "joke" level.

They're a serious issue now.

El'endia Starman

@quartata Excellent.

quartata

@El'endiaStarman I wonder how Minkolang will do on this one?

Optimizer

10:16 PM

@quartata no they have not. they are not even being used as much as they were when they were brought into this chat by the likes of Alex!

El'endia Starman

@quartata Horribly, probably.

Optimizer

(I might be wrong but alex is the first one i remember to be using them)

El'endia Starman

ASCII art is kinda hard.

flawr

How can one single person decide this???

Alex A.

@Optimizer I think it was Phi and Doorknob that first figured out they were possible. I was probably the first to annoyingly abuse them though. :P

Optimizer

10:17 PM

@flawr re stealth pings?

Alex A.

@flawr Decide what?

Doorknob

All four blue people agreed, actually

quartata

@flawr What makes you think only one person agreed on this?

Optimizer

and since when are we deciding policies based on just blue people's decision?

quartata

@Optimizer lmao

@flawr Remember, the mods have their own private room.

Doorknob

10:18 PM

@Optimizer Since the first episode of the Smurfs?

Martin Büttner

It's a bit glitchy, but I got this:

quartata

I wouldn't be surprised if they voted on this there.

Martin Büttner

2

quartata

@MartinBüttner ?

OOH

Doorknob

@MartinBüttner ooooh fancy

quartata

10:19 PM

SHINY

NOW TELL US THE SEQUENCE

El'endia Starman

@MartinBüttner Woah...

anOKsquirrel

ooh

Cᴏɴᴏʀ O'Bʀɪᴇɴ

ahhh

anOKsquirrel

> NOW TELL US THE SEQUENCE

Optimizer

@MartinBüttner space invaders?

10:20 PM

Okay okay...

@MartinBüttner YES

yess

ook

you have 15 seconds to tell us

Martin Büttner

10:20 PM

Given N, find the lowest base b where N has a square number of digits. Arrange those digits in a square matrix, transpose it, and convert back from that same base.

O_o

wow

> O_o

o_O

That's complex.

10:21 PM

Interesting.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@El'endiaStarman Stars from the starman

Doorknob

@El'endiaStarman No, it's all in the real number system actually

:P

Thomas Kwa

@MartinBüttner Noooo, I was just about to guess that

quartata

Almost as strange as Confidant Numbers.

El'endia Starman

@Doorknob ;)

Alex A.

10:21 PM

@ThomasKwa Legit?

Thomas Kwa

no

quartata

@ThomasKwa lmao no way

What made you think of this?

Alex A.

@ThomasKwa 10/10 good troll

Martin Büttner

I wonder what sort of other transformations of the matrix would yield... like reading it along diagonals or antidiagonals.

Thomas Kwa

I didn't sarcasm obviously enough

flawr

10:22 PM

@MartinBüttner Why would anyone do that???

Cᴏɴᴏʀ O'Bʀɪᴇɴ

I would have guessed it, except this chat box was too small to contain the guess.

quartata

@MartinBüttner Ooh! Ooh! Invert it!

Alex A.

Invert, you mean?

Martin Büttner

@quartata ummm

@flawr because it gives a funny plot? :)

Thomas Kwa

Well, inverting over reals would give lots of stuff that isn't digits

quartata

10:23 PM

@AlexA. spelling is difficult

Thomas Kwa

inverting over the finite field would work, but what if the base isn't a power of a prime?

quartata

Oh wait... I misunderstood this

El'endia Starman

@ThomasKwa Scale and translate to make them fit into the same range. Oh, and round/truncate too.

Martin Büttner

@ThomasKwa well, converting back from the base would still be well defined.

Alex A.

@ThomasKwa o u don't no complex digits?

flawr

10:23 PM

Compute the QR decomposition! (Or LU or SVD or Cholesky or whatever the hell you want=)

quartata

@AlexA. It wouldn't make a lot of sense, that's for sure.

flawr

0

Q: Count the number of sides on a polygon

Count the number of sides on a polygon The polygon-side-counting robot has decided to travel the world without telling anyone before, but it is crucial that the process of polygon counting is not stopped for too long. So you have following task: Given a black and white image of a polygon, your p...

Alex A.

@MartinBüttner Lowest positive base?

Martin Büttner

yes

greater than 1

Alex A.

Ok

quartata

10:25 PM

You could just round the resulting numbers and take only the real part I suppose.

It would be kinda boring though.

Alex A.

@MartinBüttner Arrange columnwise or rowwise into a matrix?

New Main Posts

1

Q: Count the number of sides on a polygon

Count the number of sides on a polygon The polygon-side-counting robot has decided to travel the world without telling anyone before, but it is crucial that the process of polygon counting is not stopped for too long. So you have following task: Given a black and white image of a polygon, your p...

code-golf image-processing

Martin Büttner

@AlexA. doesn't matter as long as you convert it back the same way

Alex A.

Hm yeah

quartata

Ooh! Ooh! I thought of something that makes me not sound like an idiot!

Martin Büttner

10:26 PM

^ that wasn't it

Alex A.

haha

quartata

Make a matrix out of the sums of the diagonals?

Alex A.

Wouldn't that just be a vector?

Martin Büttner

if the side length is N, there are 2N-1 diagonals. how do you arrange the sums in a matrix? (not that it's not possible, but it's not uniquely defined)

Alex A.

^

quartata

10:27 PM

You'd fit it into a matrix of the same dimensions

Pad it with 0s

El'endia Starman

Reading order or anti-diagonals?

Anonymous

There, done with my edit spree

TanMath

@flawr so your challenge comes down to detecting lines?

quartata

@El'endiaStarman It would include both, I believe.

Optimizer

so, is this a permanent suspension we are talking about?

quartata

10:31 PM

Lemme see.

Optimizer

(do mods even have that kind of power?)

Cᴏɴᴏʀ O'Bʀɪᴇɴ

OMG I FOUND A PATTERN

flawr

@TanMath Perhaps=)

Thomas Kwa

@CᴏɴᴏʀO'Bʀɪᴇɴ reverse-square?

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@ThomasKwa YEAH

I think

Alex A.

10:32 PM

@Optimizer What, for stealth pings?

Optimizer

yes

Alex A.

No, not permanent.

Martin Büttner

reversing rows and columns gives funny plots too, but not quite as nice as transpose

PhiNotPi

I'm here because I heard that somebody ruined stealth pinging.

Anonymous

KoS could make for a "permanent" suspension

El'endia Starman

10:33 PM

Well, hmm. If you have a 3x3 matrix, and you end up with five numbers, do you arrange them like
1 2 3
4 5 0
0 0 0
or...
1 3 6
2 5 0
4 0 0
?

flawr

@AlexA. Did anyone complain about it anyway?

Alex A.

@PhiNotPi Yep. See pinned message.

quartata

@El'endiaStarman Oh I see what you mean.

Reading order.

Alex A.

@flawr Complain about what?

quartata

I thought you were talking about which diagonals...

flawr

10:33 PM

@AlexA. About stealth pinging

Thomas Kwa

Hey, does anyone remember how to do "smallest number that satisfies this function" in APL?

Alex A.

@flawr That it was annoying?

Anonymous

Tbh there's no good reason to do a stealth ping

El'endia Starman

@quartata gotcha

Anonymous

I hate it when I words backwards get

quartata

10:34 PM

Sorry for the confusion.

@Mego hue hue

flawr

@AlexA. I think it was used a few times for fun, but without anybody getting really annoyed.

Optimizer

I feel you bro

Alex A.

More recently it was being abused and annoyed at least a few people.

quartata

@AlexA. Yeah

Anonymous

@ThomasKwa Thanks for catching that oops I made in the permalink

quartata

10:35 PM

I think this is a good thing, really.

It was never all THAT funny.

Optimizer

@AlexA. I keep hearing that "it annoyed a few people" Can you link to those messages where this annoyance was conveyed?

Thomas Kwa

@Mego np

Cᴏɴᴏʀ O'Bʀɪᴇɴ

^^

quartata

@Optimizer Just look at Sock's recent messages

Optimizer

meh sock

Alex A.

10:36 PM

@Optimizer I don't know which messages in particular; I wasn't in the room at the time.

Thomas Kwa

It looks good, but it needs more postfixins.

6

quartata

chat.stackexchange.com/users/175721/sock

Optimizer

that was probably sarcasm/trolling. If it really annoyed, the owner should complain

Alex A.

The owner of what?

quartata

@Optimizer I meant the user Sock.

This guy: chat.stackexchange.com/users/175721/sock

Optimizer

10:37 PM

isn't that a sock of someone?

Anonymous

23 hours ago, by Optimizer

STOP IT GUYSSS

quartata

@Mego Wow.

Optimizer has dementia.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

^

anOKsquirrel

^

Optimizer

1 min ago, by Optimizer

that was probably sarcasm/trolling. If it really annoyed, the owner should complain

omg, did someone here take me seriously for once ? :D (that too at the wrong time)

Anonymous

10:38 PM

23 hours ago, by quartata

@TanMath Please stop over-using stealth pings.

quartata

It got way worse today.

Optimizer

I think the capital letters and three s should be enough of a proof that I was not serious.

Anonymous

23 hours ago, by Alex A.

Use sparingly

Anonymous

23 hours ago, by Doorknob

waves trout around vaguely menacingly

Martin Büttner

@CᴏɴᴏʀO'Bʀɪᴇɴ so how is that working out?

quartata

10:39 PM

3 hours ago, by Sock

I am so tempted to stealth ping....

4 hours ago, by Sock

stealth ping!

4 hours ago, by Sock

stealth ping!

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@MartinBüttner I had a bit of a false lead

quartata

3 hours ago, by Sock

stealth-ping

Optimizer

oh, btw, I've already stealth pinged now, so I am off to sleep.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

Though I'm on to a new thing

quartata

23 hours ago, by TanMath

did the stealth ping work?

6 hours ago, by Stefnotch

tempted to make a shortest stealth ping to message adder challenge

Anonymous

10:40 PM

The fact that Dennis banned them implies that Dennis was getting annoyed with them too

quartata

6 hours ago, by Stefnotch

Does this stealth ping work?

Optimizer

@quartata how are these annoying? I can also point out most of your messages.

which will be annoying.

almost all of the time this chat room is off-topic anyways, blaming stealth ping is simply wrong.

quartata

Stealth ping adds no humor.

anOKsquirrel

^

quartata

At all.

They're merely annoying.

Alex A.

10:41 PM

No one is blaming stealth pinging for the room being off topic.

Anonymous

Dennis banned them and a mod pinned them, which means 1 or 2 mods thought they were annoying. Plus 15 stars, so 16 people minimum agree with them being banned.

quartata

It's a bug.

Optimizer

@quartata so does carrot

Doorknob

@Mego He pinned it himself, but it was an agreed-upon decision by all four mods.

Anonymous

Stealth pings add nothing to the room except annoyance

2

Alex A.

10:42 PM

@Doorknob And the fifth would probably agree. :P

quartata

@Optimizer I find carrot annoying too. But the stealth ping is actually harassing.

2

Martin Büttner

I tried out a few more transformations for that sequence... reverse rows, columns, rotate left, right, read along diagonals, antidiagonals... most of them are not much more interesting than reversing bits. reading along antidiagonals looks similar to the transpose, and reading antidiagonals from the end as well, but that has a lot more linear parts.

Anonymous

@Doorknob Mmkay. So unanimous by mods, plus between 13 and 16 other users (depending on who starred it)

quartata

@MartinBüttner Hm.

Doorknob

@quartata The whole "carrot" thing would be much more annoying if this room were actually on-topic

anOKsquirrel

10:43 PM

@MartinBüttner what was the original again?

transpose

oh yeah I remember

@Doorknob T_T

@MartinBüttner ... such as how it is now! Except usually, that's not the case :P

Anonymous

^ is a common way to express agreeance with the above message in text-based chat. carrot(\..+) is a humorous way to do it

Alex A.

10:44 PM

Idk, it's pretty annoying anyway, despite the room being off topic. :P

Optimizer

I like how you guys define your annoyance boundaries. wow.

quartata

Maybe something element-wise

Anonymous

@Optimizer Welcome to PPCG, where people get annoyed if you don't explain exactly what annoys you in the most pedantic way possible

12

quartata

Like change the base of all the numbers or something

Much less interesting obviously...

Anonymous

And for the 360-noscope-meta, I get annoyed by pedantry

Anonymous

10:45 PM

:D

Alex A.

What?

flawr

@Mego Get outa here! =P

quartata

Hmm...

Cᴏɴᴏʀ O'Bʀɪᴇɴ

How to convert string to number in python? :P

quartata

@CᴏɴᴏʀO'Bʀɪᴇɴ int(

Cᴏɴᴏʀ O'Bʀɪᴇɴ

10:47 PM

"0.01"

...

Sp3000

float()

Anonymous

eval()

Cᴏɴᴏʀ O'Bʀɪᴇɴ

erm

anOKsquirrel

"exit()"

2

Cᴏɴᴏʀ O'Bʀɪᴇɴ

ಠ_ಠ

Alex A.

10:48 PM

Alt+F4

2

Optimizer

rm -rf /

Sp3000

import ast; ast.literal_eval

anOKsquirrel

there needs to be a unicode char for a reverse ಠ

Cᴏɴᴏʀ O'Bʀɪᴇɴ

>_<

quartata

@MartinBüttner How about something with submatrices? Like take the first digit, remove that row, take the second digit, remove that column maybe?

Anonymous

10:48 PM

eval("1") == 1 and eval("1.5") == 1.5 and eval("1+2j") == complex(1, 2)

El'endia Starman

46 secs ago, by Sp3000

import ast; ast.literal_eval

Anonymous

@El'endiaStarman Yeah but that's so many extra bytes

El'endia Starman

^^ Much safer.

quartata

@El'endiaStarman This is the way to do it

anOKsquirrel

doesn't need to be save in codegolf

quartata

10:49 PM

If you don't know what the number is

Anonymous

Who needs safety when you have bytes to shave off

anOKsquirrel

safe*

Martin Büttner

@quartata try it out and post some plots? :) ... I'm heading to bed for now... might look into turning this into a challenge tomorrow.

quartata

@MartinBüttner Man, you know I can't Mathematica...

Martin Büttner

there are other languages that can do plots ;)

Sp3000

10:50 PM

@Mego Please use eval on your server, I'd love to "try out your language" :)

Alex A.

Really? I don't think so.

El'endia Starman

Like Python and matplotlib...

quartata

@MartinBüttner All of which I suck at

I'll try it with Octave

El'endia Starman

Plotting something simple like that is pretty easy with matplotlib.

quartata

@El'endiaStarman ?

El'endia Starman

10:52 PM

import matplotlib.pyplot as plt
plt.plot(x_coords, y_coords)
plt.show()

quartata

@El'endiaStarman Oh, I haven't heard of this library.

Martin Büttner

@Sp3000 is that what the kids are calling it these days?

Anonymous

@Sp3000 ∞<stuff here>∞ runs through eval. It runs in a virtualenv, so you can't do much damage, and any damage you do can easily be fixed by me just redeploying :P

Anonymous

@quartata Sage uses it for plotting

quartata

@Mego Interesting.

Anonymous

10:53 PM

Side note: Sage is probably your best bet :P

quartata

I mostly use TI-BASIC for this kind of stuff, actually.

I don't think it has the capabilities to do what I want here though.

Alex A.

@Mego I briefly worked with William Stein on Sage!

Thomas Kwa

@quartata what? someone said TI-BASIC?

anOKsquirrel

TI-BASIC :D

El'endia Starman

@ThomasKwa Excellent demonstration of the cocktail party effect. :P

Cᴏɴᴏʀ O'Bʀɪᴇɴ

10:55 PM

@MartinBüttner The end of the bonus is in sight.

Thomas Kwa

@quartata Oh, you mean Martin's sequence. Yeah, that would be a pain on a calculator

Anonymous

@AlexA. Neat! My Cal 3/DiffEq prof also worked with him

anOKsquirrel

anyone know the shortest base conversion in python?

El'endia Starman

import base
base.convert(num, base1, base2)

anOKsquirrel

that's it, really? cool

El'endia Starman

10:57 PM

(</troll>)

anOKsquirrel

oh

;-;

El'endia Starman

I wish, though.

Thomas Kwa

@anOKsquirrel there's also builtin bin

anOKsquirrel

yeah

@ThomasKwa any base

Anonymous

def digit_to_char(digit):
    if digit < 10:
        return str(digit)
    return chr(ord('a') + digit - 10)

def str_base(number,base):
    if number < 0:
        return '-' + str_base(-number, base)
    (d, m) = divmod(number, base)
    if d > 0:
        return str_base(d, base) + digit_to_char(m)
    return digit_to_char(m)

Anonymous

10:58 PM

Not the shortest, but that's the code Seriously uses

anOKsquirrel

ew

I'll just use cjam

Anonymous

Any thoughts on this?

Anonymous

3

A: Sandbox for Proposed Challenges

Bernoulli Numbers The Bernoulli numbers (specifically, the second Bernoulli numbers) are defined by the following recursive definition: Where denotes a combination. Given a nonnegative integer m as input, output the decimal representation of the mth second Bernoulli number. You must have at...

Sp3000

@anOKsquirrel Converting to base 10 from base 2-36 can be done with int, otherwise you might as well do it by hand (except binary, oct and hex)

quartata

4

A: Sandbox for Proposed Challenges

Grocery Store Micromanagement You are an employee at the hip new grocery store Half Foods, and it's the day before Thanksgiving. Since the store will be packed with customers rushing to get their turkeys, pumpkin pies and/or lentil loaves, the store needs a traffic manager to send everyone to th...

Transcript for