The Nineteenth Byte - 2019-01-26

« first day (2919 days earlier) ← previous day next day → last day (2219 days later) »

ASCII-only

00:02

@Downgoat didn't we have different null coalesce? i'd say ?: would be good

@Downgoat or even any other language

@Adám :O using dzaima apl?

@DJMcMayhem setInterval XD

MilkyWay90

00:16

@dzaima Which neighbour counts?

@dzaima What is an "other modifying states"?

Downgoat

00:30

@ASCII-only oh smart

MilkyWay90

1

A: Restricted Polyglot

Bash + sh + zsh + ksh, 4 bytes: echo Really simple and satisfies every rule: Outputs a newline in each of the languages. Output currently does not vary in any way between the languages. Does not produce an error in any of the languages... ...except when any of the characters are removed/chan...

0

A: Restricted Polyglot

Bash + sh + zsh + ksh + Windows Batch, 4 bytes: echo Really simple and satisfies every rule: Outputs a newline which doesn't vary in each of the languages (but Windows Batch, which outputs ECHO is on, on the language you use), doesn't error, except when any letter is removed or changed.

?

There's duplicate answers

Downgoat

@ASCII-only @ASCII-only should things be auto-wrapped as optoinal? e.g. should let a = 1; let b: Int? = a work or should it be let a = 1; let b: Int? = a?

MilkyWay90

@dzaima For example (in RLE, copy.sh/life format) 2o$2o! --> 3o$3o! --> 4o$4o! --> 5o$5o! and so on

Neil

01:19

@ASCII-only is it me or do I use AtIndex(u, Negate(1)) a lot?

Pavel

01:47

Every single other challenge I've had died after like three days but codegolf.stackexchange.com/questions/177454/… still regularly gets answers and votes despite last being touched over a month ago by me

Anonymous

02:46

@Downgoat IMO auto-wrapping into optionals where it's unambiguous is fine and expected

Pavel

@Mego This seems related, C# 8 is supposed to have a feature where (condition ? 42 : null) evalueates to int? instead of a compiler error and that's nice

1 hour later…

lirtosiast

04:10

@AdmBorkBork Sledgehammer, 4 bytes: ⡤⢶⡸⡿

ASCII-only

@Neil thinking about it, I've seen that pretty often. When I get access to a computer again, I'll take a look to see what I might be able to overload

@Downgoat auto wrapped, yes

MilkyWay90

hi

Veskah

Shalom

MilkyWay90

42

Q: Code that runs the Game of Life on itself

Write two rectangular blocks of code, each w characters wide and h characters tall, that implement Conway's Game of Life when arranged in a grid. (w and h may be any positive integers) For example, the two code blocks might be: (w = 3, h = 2, not actual code) XX| --+ and | --+ Treat the ...

code-golf quine game-of-life source-layout

I thought this would be impossible

FrownyFrog

04:45

@Adám 13 bytes tio.run/##y/r/P81WT8G0yNxIK1rXQM9Ey0bvf2pyRr5CmoKhhZ6pCReUY/…

2 hours later…

Pavel

06:15

Dammit libreoffice how is U.S. not a word ._.

Anonymous

06:29

@Pavel Because it's an initialism :P

Anonymous

07:00

@MilkyWay90 Here's a good start

Bubbler

08:03

@Adám How about this: ⊢*⍸*⊣

It does run when both sides are 1D arrays with same length, though I can't really describe what it does

3 hours later…

dzaima

11:27

@MilkyWay90 one of those in the message.. i.e. it wants to die but another tells it to not

@MilkyWay90 oh i thought a glider meant that it leaves nothing behind :|

@MilkyWay90 looks like this is doing something like that

@ASCII-only probably for the one byte save so i wouldn't nag about -1 byte in dzaima/APL :p

1 hour later…

dzaima

12:50

@Mego do i need to get something special to run rules with 24 neighbors?

New Main Posts

13:18

0

Q: Coloring problem [dynamic programming]

Statement You have a table with N rows and M columns. For each of the N rows you know the number A_i. Now, you can color first A_i cells, or last M - A_i cells. The "boredness" of a column (not row) is product of number of colored cells and number of empty cells of this column. So, "boredness" o...

math matrix algorithm

3 hours later…

MilkyWay90

16:07

@dzaima Yeah, I miscalculated and realized when I actually typed it out

@dzaima Use an OR gate. Here, 0 is die and 1 is become alive. Therefore, the cell would become alive

@Mego Thanks, I'll try it

@dzaima Yeah, sort of like my cellular automaton (maybe exactly, I dunno)

dzaima

@MilkyWay90 it should be your cellular automaton if i did everything right

MilkyWay90

Oh ok

@dzaima Do you have the .rule file for that

I'm currently opening Golly to test Mego's solution

dzaima

@MilkyWay90 that's not golly, the rule is hardcoded in java

MilkyWay90

@dzaima oof

I got an error saying bad basic values

So how do I run it in Java

dzaima

@MilkyWay90 yeah me too

MilkyWay90

16:16

I have it installed

Let me see the .py file

dzaima

@MilkyWay90 what .py file, all i've written is Processing

MilkyWay90

`# uses Moore neighborhood with radius 2

def transition function(a):
# NW NNW N NNE NE
# WNW nw n ne ENE
# W w c e E
# WSW sw s se ESE
# SW SSW S SSE SE
c,n,ne,e,se,s,sw,w,nw,N,NNE,NE,ENE,E,ESE,SE,SSE,S,SSW,SW,WSW,W,WNW,NW,NNW = a
n = n + ne + e + se + s + sw + w + nw
if n in (0,1,6,7,8):
return 0

s_n = w + c + e + se + SSE + S + SSW + sw
if s and s_n == 2:
return 1

w_n = WNW + nw + n + c + s + sw + WSW + W
if w and w_n == 3:
return 1

n_n = NNW + N + NNE + ne + e + c + w + nw

oh oof

Markdown has failed me

dzaima

@MilkyWay90 pad lines with 4 spaces. markdown doesn't work in multiline messages. also that's megos .py file

MilkyWay90

@dzaima Oh ok

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

Adventure ASCII Adventure Growing up, my first console game system was an Atari 2600 and I will always have a love for some of those games I so enjoyed as a child. Many of the graphics are still memorable, some I might even describe as iconic. It turns out that these sprites were stored as ver...

MilkyWay90

16:27

This is the code, since Markdown doesn't work for multiline chat

@mego Is a in your python script supposed to be a list of lists?

Anyways

I am going to make a CMC

CMC : code-golf Given a two-dimensional array, output the elements on the array, sorted from least to greatest from their absolute distance from the origin

For example:

as       -->  abs or bas
 b

lirtosiast

16:47

@Adám Jelly, 9 bytes: d1ḋ3,5÷72

The port to Sledgehammer is 8.625 bytes

MilkyWay90

abc  --> aabbc
  b
  a

And you divide your score by ONE if you can make a version which works for this:

|m
|d      f w
| p w d
|                m
|
|         d
|
|     f             w
|_ _ _ _ _ _ _ _ _ _ _ _

Erik the Outgolfer

17:30

@Adám Jelly, 7 bytes: ḅ60÷⁽¢Ẓ

dzaima

@EriktheOutgolfer the input must be a number in the format HH.MM, not an array

Erik the Outgolfer

ah, so a float?

I read that as "HH.MM format"...

lirtosiast

18:07

@MilkyWay90 Jelly, 9 bytes: ṚŒĖḢ’ÆḊƊÞ

Erik the Outgolfer

18:34

@MilkyWay90 Jelly, 8 bytes: ṚŒJSÞœịƊ

ngn

@MilkyWay90 that pattern looks familiar :) so you cracked ox.txt?

Anonymous

@MilkyWay90 1d list, with 25 elements - the current cell state, plus the neighbors' states

Anonymous

@dzaima Shouldn't need to. Golly should know that it's Moore2

Adám

@ASCII-only It saves a single byte of Dyalog (a trailing no-op ⊢)

@Bubbler Very nice looking, but it raises the right argument to the power of the intervals in the left that the right's elements fall into — raised to the power of the left argument. Hardly meaningful, though.

dzaima

18:52

@Mego dragging it in golly gives me "Bad basic values" and loading trough "set rule" gives me "The given rule is not valid in any algorithm."

Anonymous

That's weird

Anonymous

I generated it with the generator that comes with Golly

dzaima

@Mego i can generate a 24-neighbor rule file too, but can't seem to open it

Anonymous

Odd

Anonymous

Maybe the tree format doesn't like r2? I'll make a table rule

Anonymous

19:03

Oh, Moore2 isn't supported by Golly yet... RIP

Anonymous

19:13

Well, the Python transition function will work, even if the rule won't

lirtosiast

19:46

@EriktheOutgolfer e should come before i, unless OP meant Manhattan distance, in which case we still want ṚŒĖḢS$Þ (7 bytes)

Erik the Outgolfer

you mean real distance?

because that's prone to floating-point inaccuracies

also... hadn't thought of enumerating :P

lirtosiast

Yeah I used real distance

Erik the Outgolfer

I see :P

New Main Posts

20:15

CLEAN UP ON AISLE ELEVEN

Erik the Outgolfer

@NewMainPosts umm... that's not on hold...

@NewMainPosts TRASH ALERT (cc @Mego show your flipper :P)

whoops last RO ninja'd

MilkyWay90

20:31

@ngn Hopefully my approach works, then yeah

@ngn No, my idea didnt work

@lirtosiast I mean absolute distance, as in a cell 2 units away for x and 3 away for y would have an absolute distance of sqrt(2^2 + 3^2)

lirtosiast

Jelly might not win then

Jelly is 1 indexed which wastes a byte, and its Euclidean distance builtin is 2 bytes, and so is its multidimensional enumerate.

MilkyWay90

oh

Is there already an XOR two images contest

CMC: Xor two images from two URLs on the web or files in the file system. The images can have color in them

lirtosiast

20:51

as in, take the bitwise xor of the binary representations of the images?

MilkyWay90

Yes

Neil

@ASCII-only actually in this particular case I was able to use Push(u, PushOperator(Pop(u), ...)) anyway

lirtosiast

It's all input format then... just convert image to integer and back

MilkyWay90

i guess so

lirtosiast

Image[BitXor@@ImageData/@#]& works in Mathematica if the ImageType is not a float

MilkyWay90

22:01

ok

1 hour later…

ASCII-only

23:30

@Adám just kinda surprised you know dzaima/APL at all lol

Adám

@ASCII-only It is mostly based on Dyalog + my extensions.

ASCII-only

@MilkyWay90 including the _ and |?

@Adám oh, huh. how different is it from Extended?

@Mego wait what

Adám

@ASCII-only It adds a shortcut for 1-char strings, allows omitting a trailing ⊢ and retracts on a couple of unfortunate decisions from APL's history, while Extended, as the name implies, only adds features.

ASCII-only

ah

@MilkyWay90 done

@dzaima >:D charcoal beats canvas on extendify the sun

« first day (2919 days earlier) ← previous day next day → last day (2219 days later) »

Transcript for

Jan '1926

The Nineteenth Byte

The Nineteenth Byte: General discussion for codegolf.stackexc...

join this room
about this room

00:00

06:00

12:00

18:00

all times are UTC

site design / logo © 2025 Stack Exchange Inc; legal

mobile