The Nineteenth Byte

mbomb007

8:00 PM

@Dennis What do I do if the base64 encoded version of code for TIO has a slash `/` in it?
https://repl.it/CJxg

R. Kap

@flawr And that should now be it

mbomb007

Neither version works

quartata

@QPaysTaxes What happened to resupply in DS?

mınxomaτ

@EasterlyIrk Well, to be fair and consistent with the other translations, "Maya-Nummer" is the better German expression.

Easterly Irk

rofl

mınxomaτ

8:04 PM

?

Anonymous

@Dennis Thanks!

Easterly Irk

> Nummer

That is how my younger brother actually pronouces number. :P

flawr

@EasterlyIrk Is he german?

Easterly Irk

no

americanish

epicTCK

I don't show up anywhere on this list. Why?stackexchange.com/leagues/88/year/codegolf/2016-01-01/…

mınxomaτ

8:10 PM

@EasterlyIrk This is how "nummer" is pronounced: soundoftext.com/static/sounds/de/nummer.mp3

epicTCK

Oops pasted the wrong thing

@EasterlyIrk ish?

Easterly Irk

yah

google it

Anonymous

@epicTCK You have to have at least 200 rep to show up on the list. The system only updates the leagues every few hours. Since you just passed the 200 rep requirement an hour ago, you won't show up yet.

New Loophole Proposal

0

A: Loopholes that are forbidden by default

Generating all possible functions/programs to solve a challenge In this meta post, isaacg pointed out that, under current consensus, the following Python code (edited to fix a mistake) could possibly be viewed as valid: for i, code in enumerate(all_possible_strings): exec("func" + str(i) ...

zyabin101

\o/ \o/ \o/ New Loophole Proposal has posted!

Easterly Irk

8:17 PM

It has in the past.

Martin Büttner

sandboxed the labyrinth sequence... if anyone has an idea how to shorten the exposition without making it less clear, let me know.

flawr

@MartinBüttner Which one?

Martin Büttner

uhhh, click my starred imgur link and read from there :P

(or wait for the bot)

(or visit the sandbox)

R. Kap

5

A: Home improvement for the Minotaur

Python 3.5, 703 695 676 648 587 581 542 535 500 486 462 431 bytes: (Thanks to @flawr for advice on saving plenty of bytes!) def j(r):R=range;Z=zip;B=r+r+2;P='+';M='-';X='| ';q=[*Z(R(0,B-1,2),R(B-1,0,-2))];L=r+1;A=2+r;print('\n'.join([X*w+P+M*v+P+' |'*w for v,w in Z(R(4*L*4-3,0,-4),R(4*L))]+[X*g...

Now it's probably as short as can be :)

Martin Büttner

Plot twist: it never is.

2

R. Kap

8:24 PM

Does anyone here know of a short way to do ''.join() in Python?

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

The Back-and-Forth Sequence code-golfnumbersequencecounting Imagine a path made up of < and > and ending in a @, e.g. ><>@ A walker starts on the left-most cell, facing right. He will traverse the path as follows: If the walker is on a @ cell, he's reached the goal and is done. If the walk...

R. Kap

Or is that the shortest way to do it?

@MartinBüttner Oh no...;_;

Anonymous

It would be interesting to try to construct a proof that a given solution is the optimal solution (length-wise) in a given language

Anonymous

Unfortunately, other than an exhaustive proof, I don't know how it could be done :P

Cᴏɴᴏʀ O'Bʀɪᴇɴ

I'm sure it's possible for some (golfing) languages with a minimal instruction set

miles

8:32 PM

Is anyone familiar with the online interpreter for J that is usually linked? Is it reliable? How does one save their state to it as a link?

Cᴏɴᴏʀ O'Bʀɪᴇɴ

It's reliable for most things, except for some statements like 3 : 0 and stuff

Zgarb

@miles tryj.tk? It has some rare but annoying bugs.

Maltysen

@CᴏɴᴏʀO'Bʀɪᴇɴ I saw from the starboard that you were going to ask someone out. How'd it go? :P

Cᴏɴᴏʀ O'Bʀɪᴇɴ

a296a8f7c5110b2ece73921ddc2abbaaa3c90d10.googledrive.com/host/… code here>

@Maltysen wait that's on the star board

where

Zgarb

Try evaluating */~ 1 1 1 1 1

Maltysen

8:35 PM

@CᴏɴᴏʀO'Bʀɪᴇɴ not actually on the starboard, but right under one of the messages

Cᴏɴᴏʀ O'Bʀɪᴇɴ

oh

I didn't.

I never said I was going to...

miles

@Zgarb ah good catch

Maltysen

@CᴏɴᴏʀO'Bʀɪᴇɴ oh

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@Zgarb why does that happen?

@Maltysen she's taken atm :P waiting till next year when the dude leaves

Zgarb

@CᴏɴᴏʀO'Bʀɪᴇɴ shrug

I stumbled upon it by accident some time ago.

R. Kap

8:36 PM

You know what I don't get? Why is it that in Ideone, * does not work for Python 3?

For instance, [*range(0,10)] does not work in Ideone.

Maltysen

@CᴏɴᴏʀO'Bʀɪᴇɴ haha, good luck

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@Zgarb That reminds me: that code is equivalent to 1 1 1 1 1 */ 1 1 1 1 1. I thought */ was insert into a list; what does it do dyadically?

mınxomaτ

I just discovered youtube.com/tv , a full-screen YouTube that can be navigated by keyboard.

Maltysen

@R.Kap that doesn't work in normal python

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@Maltysen thanks ^^" I think it'll go fine, she's liked me for longer than I've known. kinda creepy, but nice

Zgarb

8:38 PM

@CᴏɴᴏʀO'Bʀɪᴇɴ It's outer product, aka multiplication table.

R. Kap

@Maltysen So it only works in CPython?

Maltysen

@R.Kap normal python is cpython

where does that command work for you?

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@Zgarb ohhhh. so would v/~ be a table of all combinations of a v b for a in LHS and b in RHS?

R. Kap

@Maltysen In the Python 3 version I have installed on my computer.

miles

I prefer interpreting */ as insert * between each item and evaluate right to left, makes more sense if you try -/ on a list

Maltysen

8:39 PM

@R.Kap really?

its not working for me on python3.4.3

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@miles mt -- how else would one interpret that?

R. Kap

@Maltysen I got it from the official Python website, so I guess I got Python, and therefore, it works. It's really convenient.

Maltysen

@R.Kap splatting in a list?

Easterly Irk

@Maltysen works on 3.5.1

For me.

Maltysen

is it a new thing in 5 or something?

Easterly Irk

8:40 PM

MacBook-Pro:~ rikerw$ python3
Python 3.5.1 (default, Apr 18 2016, 11:46:32)
[GCC 4.2.1 Compatible Apple LLVM 7.3.0 (clang-703.0.29)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> [*range(0,10)]
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>>

R. Kap

@Maltysen I guess it is. Better upgrade your Python version soon.

Easterly Irk

@Maltysen splat is in < 3.5, but maybe splat in lists?

miles

@CᴏɴᴏʀO'Bʀɪᴇɴ what does mt mean

Easterly Irk

I know it works in arguments to functions.

Zgarb

@CᴏɴᴏʀO'Bʀɪᴇɴ For rank-0 verbs, yes. I general, it evaluates m v b for every cell m of a.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

8:41 PM

@miles "me too"

Easterly Irk

@miles either me too or mate

R. Kap

python.org

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@Zgarb oic

R. Kap

That's where I got the latest Python 3.5 version from, and [*range(0,10)] works perfectly.

Easterly Irk

Any early feedback on this?

R. Kap

8:43 PM

@EasterlyIrk You linked us to the Sandbox.

And I mean the Sandbox post itself.

zyabin101

@EasterlyIrk You made a typo in the link.

There exists no post 90360.

Maltysen

@EasterlyIrk VTC no objective winning criterion

TimmyD

VTC Sandbox -- too broad (too many possible answers) ;-)

Cᴏɴᴏʀ O'Bʀɪᴇɴ

XD

Easterly Irk

retry:

0

A: Sandbox for Proposed Challenges

Ascii Art Mayan Numerals This challenge is simple. Given a number, output a ascii-art representation of the number, using the Mayan Base-20 numeral system. What is the Mayan system? The Mayans used base 20 to store numbers, so the first position was the 1s place, the next the 20s place, then ...

TimmyD

8:46 PM

> Since I don't want to penalise languages which can't easily convert between bases, you may instead take the binary representation of the N, using 0s and 1s as usual.

@MartinBüttner Thank-you. :)

R. Kap

@EasterlyIrk Pretty good! :)

Easterly Irk

rofl

Maltysen

@EasterlyIrk this is nice

Easterly Irk

thanks

Maltysen

@EasterlyIrk wait, why won't the numbers be greater than 20?

isn't that the whole point?

Easterly Irk

8:48 PM

because I think that works as it's own challenge.

Or maybe I will add that

nice fast removed.... :P

New Sandboxed Posts

IF DOLPHINS ARE SO CLEVER WHY DO THEY LIVE IN IGLOOS

19

VTCAKAVSMoACE

@NewSandboxedPosts Is the upstairs neighbor at it again?

R. Kap

@VTCAKAVSMoACE Yes

Zgarb

@EasterlyIrk Do you really want to have that ASCII shell for 0? I'd prefer more straight lines, so they could be cleverly reused in the other shapes.

Easterly Irk

yeah

i want it... :P

@VTCAKAVSMoACE what?

R. Kap

8:52 PM

@EasterlyIrk You really want to make it hard on us, don't you?...

Easterly Irk

yeahish

i just want a hard challenge

Maltysen

Apr 12 at 4:46, by New Main Posts

I SURE DO LIKE IT WHEN MY UPSTAIRS NEIGHBORS VACUUM AT 2 AM

Easterly Irk

oh

R. Kap

@EasterlyIrk Well, challenge accepted.

Quill

monring

Easterly Irk

8:55 PM

monking

R. Kap

@Quill Hello

Zgarb

@EasterlyIrk I don't think the shell makes it harder in the sense of having to think more, because the only way to golf it is to use a compression algorithm, which is kind of separate from the rest of the challenge.

But that's just my 2 cents.

zyabin101

@Quill nihgt

Martin Büttner

@Mego "Builtin functions that calculate the Kronecker sum or Kronecker products are not allowed"

R. Kap

@Zgarb Well, Python has zlib for a reason.

It even has base64 for a reason.

zyabin101

8:57 PM

FGITW'd! \o/ \o/ \o/

Easterly Irk

@Zgarb okai

If I had a better shell, I would use it.

R. Kap

Hello! @QPaysTaxes

New Meta Posts

1

Q: Does drag+paste count as a valid form of input in Excel?

I recently answered in Excel, where my input was based on the user copying a cell's contents via drag and past over multiple cells, where the input n was the final cell to which was dragged, which I thought was acceptable in the question: "You can get n any way." yet also "Standard loopholes are ...

discussion

Martin Büttner

@TimmyD I think the most golfy version of the formula could likely be recursive which would make the infinite stream easiest.

Anonymous

@MartinBüttner Derp I can't read

Martin Büttner

8:58 PM

But at the same time, I would actually like to see those answer, hence considering to allow it.

(In fact, I'm hoping that competitive answers won't need to do the actual simulation.)

mınxomaτ

Why running Google's DeepDream on Video is a bad idea.

TimmyD

@MartinBüttner Oh, durr, that makes sense. I was just thinking of a singular method.

Zgarb

 -------------------
|    |    |    |    |
|    |    |    |    |
|-------------------|
|                   |
|                   |
 -------------------

@EasterlyIrk ^

R. Kap

@Zgarb I like that much better than what @EasterlyIrk already has

miles

@Mego thanks for helping me realize I could use matrix division to find the identity

Easterly Irk

9:01 PM

@Zgarb okai

@mınxomaτ wtf

Martin Büttner

@mınxomaτ I wasn't gonna sleep anyway.

mınxomaτ

> Was wasn't

So you do?

Martin Büttner

I have no clue what you're talking about.

Quill

sounds like you could use some

Cᴏɴᴏʀ O'Bʀɪᴇɴ

heyy @Dennis would it be legal to host J on TIO?

miles

9:04 PM

that makes me wonder, is the syntax of a language protected? If you write your own compiler, interpreter, etc. for some language, can they have any legal grounds to stop you?

Maltysen

@miles depends on the license of the language

@mınxomaτ my god deep dream is awesome

VTCAKAVSMoACE

RDFTD:

Toby Fox - Megalovania (Flear Remix)

►

Zgarb

@CᴏɴᴏʀO'Bʀɪᴇɴ J source is apparently licensed under GPL, so I guess it should be fine law-wise. But J has eval and filesystem functions, so Dennis may be hesitant.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@Zgarb Oh, true. :| doesn't Julia tho?

Zgarb

I don't know what he did with Julia to host it though.

Ninja'd

Easterly Irk

9:10 PM

He generally removes those bits

He did with Vitsy, at least.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

well, that's easier bc you can mod Vitsy's src

Zgarb

Have you looked at the J source? I wouldn't want to modify that.

quartata

@CᴏɴᴏʀO'Bʀɪᴇɴ If it's licensed under the GPL the source must be available in some form

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@Zgarb no, I haven't -- what's it written in?

quartata

@CᴏɴᴏʀO'Bʀɪᴇɴ C

Cᴏɴᴏʀ O'Bʀɪᴇɴ

9:12 PM

I might want to look at that

Zgarb

@CᴏɴᴏʀO'Bʀɪᴇɴ C, but with so many macros it looks like J.

quartata

You really don't want to look at it

Cᴏɴᴏʀ O'Bʀɪᴇɴ

oh god

but I need to know how to parse/exec it

I'm trying to make my own

quartata

Well, if you insist... github.com/jsoftware/jsource

It's really bad.

New Main Posts

3

Q: Transform a matrix

Write a program where a matrix A read from SI (maximum value of dimensions of the matrix is 100) is transformed to a new matrix B. Each element of the new matrix B is the sum of the positive neighbors of the corresponding element of the matrix A. Print the new matrix B on the standard output. Ex...

matrix

Cᴏɴᴏʀ O'Bʀɪᴇɴ

9:14 PM

uh, nvm, I don't need to know that badly

quartata

I thought so.

Zgarb

@CᴏɴᴏʀO'Bʀɪᴇɴ github.com/jsoftware/jsource/blob/master/jsrc/vcat.c

Cᴏɴᴏʀ O'Bʀɪᴇɴ

I think I'd learn more by looking at a J interpreter written in PHP

quartata

@Zgarb Yeah, that's probably one of the files on the "don't touch ever again" list

@CᴏɴᴏʀO'Bʀɪᴇɴ PHP is readable if written right

Cᴏɴᴏʀ O'Bʀɪᴇɴ

Exactly

I feel like the J src is a brute force result

Easterly Irk

9:22 PM

@CᴏɴᴏʀO'Bʀɪᴇɴ o source is worse....

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@EasterlyIrk No, it really isn't

Easterly Irk

yes it is

Cᴏɴᴏʀ O'Bʀɪᴇɴ

Have you looked at the J src?

Easterly Irk

yeah

github.com/phase/o/blob/master/o.c

is worse than the link @Zgarb gave

Cᴏɴᴏʀ O'Bʀɪᴇɴ

no it's not

Quill

9:23 PM

Does anyone know of any languages where a single quote (') opens a multi-line comment block?

Cᴏɴᴏʀ O'Bʀɪᴇɴ

there's more for J

@Quill why?

(I don't)

Quill

there's a bug in Prettify for VB*, trying to find a reason that it should exist

Cᴏɴᴏʀ O'Bʀɪᴇɴ

But I can make one

oh

Easterly Irk

@CᴏɴᴏʀO'Bʀɪᴇɴ rofl

Cᴏɴᴏʀ O'Bʀɪᴇɴ

¯\_(ツ)_/¯

Dennis

9:24 PM

@mbomb007 The code is entered correctly in the text area, but the browser will convert all line breaks to the format of its choice. There's no easy solution for this I'm aware of.

Easterly Irk

@NewSandboxedPosts @MartinBüttner noice

Dennis

@mbomb007 TIO uses URL-safe base64, with - and _ instead of + and /`.

@quartata It is. J's source code is the most unreadable blob of gibberish I've ever seen in production code.

quartata

@Dennis Really taking the "some form" clause to its limit

Easterly Irk

So should I leave numbers > 20 for a different challenge, or include them in here?

Cᴏɴᴏʀ O'Bʀɪᴇɴ

Is it just to get around releasing your code? i.e. obfuscation

Easterly Irk