The Nineteenth Byte

12:06 AM

@Dennis I cannot test it right now (away from computer) but I have a hunch about what the error is from. Try running the groovy script while in the same directory as it.

flawr

@PhiNotPi Still listening=)

Neil

that feeling when you golf your answer down from 172 to 159 bytes

Alex A.

It is a glorious feeling indeed

Doorknob

Holy moly that's a lot of revisions

flawr

One rev per upvote, what is the matter?

Can I ask for your opinion on this sandboxed challenge? I think it might be too difficult. I did some research and found some algorithms, but they all seem to be quite new (and I expect quite compicated.)

Alex A.

12:18 AM

@Doorknob 31 pages of revisions ._.

ՊՓԼՃՐՊՃՈԲՍԼ

@Doorknob I've seen that before...

flawr

On the other hand I think people could come up with creative (but perhpas not as good) ideas for algorithms

ՊՓԼՃՐՊՃՈԲՍԼ

@flawr It seems like a worthwhile challenge.

I like it a lot. Could yield some amazing answers too.

Alex A.

@flawr I like it

Look super hard, but then again I'm bad at image challenges

flawr

I'll add some test cases with images of dogs, and I'm sure you're going to bite=)

I thought about adding some more simplifications people can assume.

E.g. that the area is at least it's width away from the image edge.

Daniel M.

12:22 AM

So I have a code challenge where you write a single function, but it needs to be called multiple times with different parameters for all the different test cases. I wrote a class in java where you fill in the method, but then answers can only be in java. Any ideas?

flawr

Is it in the sandbox already?

Uhm, what's the problem?

Daniel M.

No

flawr

Or what do you need ideas for?

Daniel M.

I don't want to limit the answers to just java

flawr

I think that should be easily translatable to other popular languages

E.g. python/javascript e.t.c

Daniel M.

12:25 AM

I'll put it in the sandbox

flawr

If I happen to like the challenge I'm happy to help translating=)

Daniel M.

Thanks

Dennis

12:52 AM

@quartata That worked, both with the old a new version of Groovy. I finally went with -classpath /opt/rotor-lang, which seems cleaner than changing directories. rotor.tryitonline.net/…

Btw, is FizzBuzz supposed to take 30 seconds?

FlagAsSpam

@CᴏɴᴏʀO'Bʀɪᴇɴ Your fixes work (sorry for late response).

quartata

@Dennis I don't know why it is that slow but it does that on my machine too so I guess

Anyways yay it works

Alex A.

Rotor wins the award of least promising golfing language of 2015.

RikerW

lol

Daniel M.

Alright, it's in the sandbox
The bot takes way too long to post the link

quartata

1:03 AM

@AlexA. ?

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

Language Guessing code-challenge parsing (Inspired by What's the Language?) According to the first Google result, the most popular programming languages are: Java C++ C# Python PHP (For our purposes, C and C++ will both be treated as C++, though the test cases may include C source code an...

quartata

It's only one byte longer than Pyth..

Alex A.

@quartata Well, you know our "Best Of" awards?

Rotor doesn't get one of those.

quartata

yes

if it is because it's slow blame groovy

Alex A.

Is it slow? I've never used it or even seen it in action.

Dennis

1:06 AM

@quartata \o/ TIO has a 60s time limit though, so fizzing up to 200 would probably get killed...

Daniel M.

@flawr though I hope it isn't too much a duplicate of codegolf.stackexchange.com/questions/58522/…

RikerW

Just wondering, is asking how to golf a specific piece of code off topic/too broad here?

Dennis

Code Golfer's Corner

Discussion specific to golfing code. For general PPCG chatter ...

RikerW

Okay.

Actually trying for @Sp3000's challenge

Dennis

That doesn't mean you can't bring it up here, but for an extended discussion about golfing a particular submission, the other room is probably a better choice.

RikerW

1:11 AM

No, like posting on main.

That is a definite no, huh.

TanMath

No way!

Dennis

@RikerW Let me find the meta post.

RikerW

Okay.

I thought I saw some older posts like that, that had a positive score. IDR where they are though.

Dennis

14

A: Let's decide what kind of non-challenge questions we want once and for all

Questions about improving code golf / code challenge skills Examples How can I make shuffling this array shorter? How can I shorten these nested loops? How can I alias member functions in a short way? Arguments For: These more basic questions might be attractive to new users (if they can...

FlagAsSpam

"Attracting interest to see if someone can think outside the-" I see what you did there. ;D — FlagAsSpam 15 secs ago

RikerW

1:23 AM

@Dennis So a yes?

Alex A.

@Dennis Haha apparently I downvoted every single one of the answers to that question

FlagAsSpam

#unsurprised

Alex A.

?

FlagAsSpam

You down vote a lot. :P

Dennis

Well, what do you mean by piece of code? If it's something that could potentially be useful for others, consensus says yes. That doesn't mean you can dump a 300 byte answer of yours on main and ask people to make it shorter...

RikerW

1:27 AM

Nah, that is @Geobits.

@Dennis A learning algorithm test thing.

Alex A.

@FlagAsSpam Well, on meta it's a sign of disagreement, and on that I guess I disagreed that any of those things should be on topic here.

FlagAsSpam

Should I post the following comment on [this](http://codereview.stackexchange.com/q/115783/95606) post:

You know, if you wrap this up right, you might find some pretty out-of-the-box answers for this over at PPCG if you specify [tag:fastest-code] (NOT code golf) and ask for (but do not restrict to) C# answers... it probably won't look a lot like your current code, but if you want out-of-the-box stuff...

Dennis

@RikerW Is that for an ongoing challenge?

FlagAsSpam

Huh. Apparently, I can't do links.

Alex A.

Not in multiline messages

Markdown is ignored in multiline messages

RikerW

1:30 AM

@Dennis No.

FlagAsSpam

@AlexA. Oh dayum.

Alex A.

@FlagAsSpam I personally wouldn't do that.

FlagAsSpam

@AlexA. Yeah, it felt a little too... advertisey to me.

That's why I asked.

Dennis

@RikerW It's probably fine. Hard to tell without seeing the question though.

RikerW

Okay, gimme a mo to pastebin the code.

Alex A.

1:33 AM

That, plus I don't think it's good to encourage people to ask specifically for answers in a certain language unless it's a bounty, and I don't think think that would make a terribly interesting fastest-code. IMO anyway.

RikerW

^

Okay, not gonna post my test taker, only my math problem generator.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@FlagAsSpam \o/

RikerW

paste.ee/p/BYjO7

FlagAsSpam

Hey, @CᴏɴᴏʀO'Bʀɪᴇɴ, how do you think I should organize my wiki for Vitsy?

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@FlagAsSpam It depends. How much information do you have?

ՊՓԼՃՐՊՃՈԲՍԼ

1:42 AM

Here we go...

0

A: Quine permutation group

Javascript ES6, 68/1.8e16 (basically 0) $=_=>`$=${$};$(0)`.replace(eval(`/(${_})\\)/`),x=>++_%9e15+`)`);$(0) Based on my Bling Quine framework: $=_=>`$=${$};$()` Here's the output sequence starting from $(0): $=_=>`$=${$};$(1)`.replace(eval(`/(${_})\\)/`),x=>++_%9e15+`)`);$(0) $=_=>`$=${$}...

FlagAsSpam

My github wiki - so, like, all the info on Vitsy, I just need organization ideas.

RikerW

alex-is-wrong

FlagAsSpam

riker-was-rejected-by-markdown

RikerW

dont-be-mean

Cᴏɴᴏʀ O'Bʀɪᴇɴ

hehe

ՊՓԼՃՐՊՃՈԲՍԼ

1:44 AM

equal-rights-equal-fights

No idea how that fits in here.

FlagAsSpam

@RikerW It's not me it's markdown.

RikerW

wat?

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@FlagAsSpam Oh, I see. Well, I have absolutely no idea what github wiki is. I just wrote a bunch of .mds for Jolf. ¯\_(ツ)_/¯

Sorry I couldn't be of more use ^^"

FlagAsSpam

github.com/VTCAKAVSMoACE/Vitsy/wiki

Cᴏɴᴏʀ O'Bʀɪᴇɴ

oooo fancy

I would make a page for each command

Dennis

1:46 AM

@RikerW That seems a tad too specific to me. Disclaimer: That's my personal opinion.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

And then one for each of those bullets.

RikerW

@Dennis Okay.

Dennis

Are there any non-Firefox, non-Chrome people here?

RikerW

Midori occansionally?

On my old computer.

Dennis

No, I mean right now. I have a 12 kB permalink in an answer, and I'm wondering if that's a big deal.

RikerW

1:49 AM

No.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@Dennis I have IE

RikerW

BE COMPATIBLE OR BE ASSIMILATED!!!!!

NVM.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

I have windows...

RikerW

@CᴏɴᴏʀO'Bʀɪᴇɴ Do you use it???

Cᴏɴᴏʀ O'Bʀɪᴇɴ

Not often.

RikerW

1:50 AM

@Dennis ~~people~~ regular users

Dennis

@CᴏɴᴏʀO'Bʀɪᴇɴ I think IE has or used to have a problem with long URLs. Could you check?

ՊՓԼՃՐՊՃՈԲՍԼ

@Dennis Tor?

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@Dennis Yeah. Check what?

RikerW

@ՊՓԼՃՐՊՃՈԲՍԼ You use that?

ՊՓԼՃՐՊՃՈԲՍԼ

Sometimes for fun.

Dennis

1:51 AM

@CᴏɴᴏʀO'Bʀɪᴇɴ If the permalink in this answer works.

ՊՓԼՃՐՊՃՈԲՍԼ

But it's basically FF.

RikerW

Okay.

ՊՓԼՃՐՊՃՈԲՍԼ

Oh yeah, Safari.

Dennis

I'm mainly worried about MS browsers.

Although I have no idea how Safari would behave in this case.

RikerW

Oh, the link isn't the right code BTW.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

1:52 AM

<h2>Pyth, <s>40</s> <s>36</s> <s>34</s> 32 bytes</h2>
<h2>Ruby (2.2.2p95), 124 bytes</h2>
<h1><a href="https://esolangs.org/wiki/TeaScript" rel="nofollow">TeaScript</a>, 16 bytes</h1>
<h1>Bash</h1>
<h1>Jelly, 29 bytes</h1>
<h2>Pyth, 17 bytes</h2>
<h1>JavaScript, 131238 - 10 = 131228 bytes</h1>
<h1>Vitsy, 40 bytes</h1>
<h2>Java, 81 bytes</h2>
<h1>Brainf*ck, <s>489</s> 466 characters</h1>
<h2>C# - 158</h2>
<h1><a href="https://esolangs.org/wiki/MATL" rel="nofollow">MATL</a>, 48 bytes</h1>
<h1>JavaScript (ES6), 70</h1>

That's what I get

On IE

RikerW

The link is like 3 versions outdated

PhiNotPi

@flawr Glad you liked it. I just found it through random browsing.

Dennis

@CᴏɴᴏʀO'Bʀɪᴇɴ OK, that's truncated then.

Stupid IE!

Thanks anyway.

ՊՓԼՃՐՊՃՈԲՍԼ

@Dennis Hey! If you use teh potato computer, IE works like a dream.

Dennis

If you mean nightmare, sure.

Hahaha, that answer of mine just got flagged by Community.

ՊՓԼՃՐՊՃՈԲՍԼ

2:02 AM

@Dennis Why?

Dennis

Community has the annoying habit of flagging all posts that have been edited too many times.

ՊՓԼՃՐՊՃՈԲՍԼ

Oh I see...

RikerW

I hate that image.

ՊՓԼՃՐՊՃՈԲՍԼ

Hehe

Subliminal messaging!

(Stars and stuff)

RikerW

I like this one better:

Cᴏɴᴏʀ O'Bʀɪᴇɴ

2:14 AM

In a comment thread, no doubt.

RikerW

What?

The image isn't from one.

This one is though:

Cᴏɴᴏʀ O'Bʀɪᴇɴ

But the quote is probably.

RikerW

Maybe.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

Why else would we know the exact date

RikerW

Oh, yeah.

Anybody wanna join the PPCG minecraft server? I am coming on.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

2:20 AM

@RikerW I might

What's the IP?

El'endia Starman

PPCG Minecraft Server

Server closed. Files: github.com/HelkaHomba/ppcgmc1.9 New serv...

quartata

@ՊՓԼՃՐՊՃՈԲՍԼ I just tried out LZString and it is indeed better than shoco. I'll be using it in Rotor.

thanks for shouting it from the rooftops

New Sandboxed Posts

2:36 AM

0

A: Sandbox for Proposed Challenges

Your task is to decompress a string (e.g. @@) to a decimal number (e.g. 16448 in this case). The string is decompressed in a special way, shown below. Challenge The strings are compressed in this way: Take a number, e.g. 1434. Convert it to binary, padding with zeroes until the number of digi...

trichoplax

Does anyone else think it would be useful to have a new separate meta question for discussing the challenge now that it has been posted? — trichoplax 9 hours ago

Upvotes on the comment itself (linked from the time) would be a useful measure of how many people would like to see this.

(or comments with opposing views)

BrainSteel

2:59 AM

I HAVE INTERNET AGAIN

ՊՓԼՃՐՊՃՈԲՍԼ

3:13 AM

@quartata Careful about the byte count tho

The reason why shoco is used is because it stays within [0:255] charset range

orlp

@El'endiaStarman a funny: If God created man from dirt then why is there still dirt?

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@BrainSteel \o/

@orlp hahaha?

orlp

@CᴏɴᴏʀO'Bʀɪᴇɴ that's the spirit!

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@orlp o_o

orlp

@CᴏɴᴏʀO'Bʀɪᴇɴ is a neural network and we must train him

Cᴏɴᴏʀ O'Bʀɪᴇɴ

3:21 AM

x3

orlp

x3?

Nathan Merrill

random question: how would you guys design dice in a database?

orlp

@NathanMerrill [more information needed]

Nathan Merrill

you can assume that each side has a number

mınxomaτ

dice?

orlp

3:21 AM

are you storing dice roll outcomes?

Nathan Merrill

no, an actual dice

so D8

or D6

PhiNotPi

In a D&D game: "I want a quesadilla, can I role for it?" roles for quesadilla... critical miss

Nathan Merrill

or maybe a dice with 1,2,3,1,2,3

lol

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@orlp It's like :3

orlp

Dice notation

Dice notation (also known as dice algebra, common dice notation, RPG dice notation, and several other titles) is a system to represent different combinations of dice in role-playing games using simple algebra-like notation such as 2d6+12. == Standard notation == In most role-playing games, die rolls required by the system are given in the form AdX. A and X are variables, separated by the letter "d", which stands for die or dice. The letter "d" is most commonly lower-case, but some notation uses upper-case "D" (non-English texts can use the equivalent form of the first letter of the given language...

does that help?

Nathan Merrill

3:23 AM

no, because those dice assume that numbers on a single die are distinct

orlp

all are you dice physical?

or are they theoretical dice?

ՊՓԼՃՐՊՃՈԲՍԼ

5

Q: Exploding Cats!

Challenge You will be making a program/function that takes a string input of length n, and: Puts the kth char at the center of the space, where k = (n+1)/2. This will be the location of your ground zero. Puts the rest of the non-whitespace chars randomly arranged around ground zero. The Pythag...

Nathan Merrill

theoretical dice

ՊՓԼՃՐՊՃՈԲՍԼ

No answer yet? I'm surprised.

Nathan Merrill

so, they could be 2 sided dice, if you'd like

ETHproductions

3:24 AM

how do I make rawgit load my commit i waitd 1 minute but no commit plz hlp

orlp

@NathanMerrill are they uniform dice?

Nathan Merrill

yes

orlp

as in, each side has an equal side of coming up?

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@ETHproductions It just does that :(

orlp

then I'd just store it as an array of integer faces

e.g. [1,2,3,4,5,6] is the default dice

ՊՓԼՃՐՊՃՈԲՍԼ

3:25 AM

@ETHproductions Ctrl-R repeatedly

ETHproductions

@CᴏɴᴏʀO'Bʀɪᴇɴ Yes, unfortunately :( I like to call this "What commit?" mode

orlp

as long as you don't care about any other special properties other than which side can come up

Nathan Merrill

well, it needs to be in a database

orlp

that should do

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@ETHproductions XD

Nathan Merrill

3:25 AM

but it seems silly to store a row for each side

ETHproductions

@ՊՓԼՃՐՊՃՈԲՍԼ ive done that one hundrd tims but no commt

ՊՓԼՃՐՊՃՈԲՍԼ

@ETHproductions Stuff's faster if you do things from local Github.

Nathan Merrill

(especially if a die has 100 sides)

orlp

@NathanMerrill all right

then you want two tables

ETHproductions

@ՊՓԼՃՐՊՃՈԲՍԼ except that I can't load the online interpreter from local GitHub

orlp

3:26 AM

one with dice id -> [specification] as a string (in a format like 1,2,3,4,5,6)

ՊՓԼՃՐՊՃՈԲՍԼ

@ETHproductions I meant committing from local Github.

orlp

and you make the specification sorted and unique

ETHproductions

@ՊՓԼՃՐՊՃՈԲՍԼ I do commit from local GitHub. So it's slower if you do it online? Thanks for letting me know, I'll keep that in mind...

orlp

alternatively you can even use hash(<sorted die code>) as their id, to find the id without having to lookup in the database

Nathan Merrill

@orlp and the second table?

orlp

3:28 AM

@NathanMerrill your dice linked to the ids :)

assuming you have some kind of inventory of dice

Nathan Merrill

sure, I have "dice instances"

orlp

if you only want to store dice types, then you're done with table 1

Nathan Merrill

the string isn't a bad idea

I think I could even expand it

ՊՓԼՃՐՊՃՈԲՍԼ

@ETHproductions Oh. I thought you were doing things entirely online. (I used to do that.)

ETHproductions

cdn.rawgit.com has it, why doesn't rawgit.com?

@ՊՓԼՃՐՊՃՈԲՍԼ Yeah, I used to as well

orlp

3:29 AM

@ETHproductions caching and stuff

Nathan Merrill

thanks :)

ՊՓԼՃՐՊՃՈԲՍԼ

rawgit.com has some comparisons.

ETHproductions

yay commit finaly came thx for the hlp

ՊՓԼՃՐՊՃՈԲՍԼ

Ay \o/

mınxomaτ

The van Gogh challenge made a really good test for my autotracer. (Not for this challenge, but to test the general quality of the tracing): gist.github.com/minxomat/504f95c7ad421a0afe59

Cᴏɴᴏʀ O'Bʀɪᴇɴ

3:30 AM

@ՊՓԼՃՐՊՃՈԲՍԼ I still do.

ՊՓԼՃՐՊՃՈԲՍԼ

@CᴏɴᴏʀO'Bʀɪᴇɴ Hmm... you should really try local.

ETHproductions

It says "New changes will be reflected in minutes."... guess I just have to learn some patience

orlp

@mınxomaτ source?

ETHproductions

SecurityError: The operation is insecure.

Not what I want to hear when trying out Web Workers :|

Cᴏɴᴏʀ O'Bʀɪᴇɴ

say what

mınxomaτ

3:31 AM

@orlp The image or the tracer? (The latter is a university research and therefore not public (but will be soon)).

ETHproductions

OK, pushing another debugging fix... I hope rawgit responds faster this time, otherwise I'll be stuck chatting in here all night :P

orlp

@mınxomaτ the tracer

ETHproductions

But no-o-o-o, rawgit is taking its dear sweet time tonight

throws laptop

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@ETHproductions stay with us

ETHproductions

That didn't help either, let me try again

throws laptop CURSE YOU STUPID CACHEING!!!

ՊՓԼՃՐՊՃՈԲՍԼ

3:36 AM

@ETHproductions NOOO LE COMPUTADOR ES WRECKO

Wow that was some serious fraspanglish fake stuff.

ETHproductions

@ՊՓԼՃՐՊՃՈԲՍԼ AND IT DIDN'T HELPO UNO BIT-O

I need to focus on something else

Yay, it worked :D

Nothing changed >:(

Maybe I should read the Worker manual more closely

WHY IT NO WORKY-oh, cross-domain policy

well then how do I get it to work if I need to access rawgit from github.io?

Plan A: try the best hacky pure-JS solution I can find online

Whoa, rawgit was just like "Oh, you want your commit? Here you go." :D

Cᴏɴᴏʀ O'Bʀɪᴇɴ

3:53 AM

O-o

But yay for pure JS!

ETHproductions

And now the Worker works! \o/

But the task it was supposed to accomplish doesn't. /o\

mınxomaτ

Should one post a second answer to a challenge in the same language if the approach is substantially different?

quartata

yea sure

although if they are both your answers you should just combine them into one

Cᴏɴᴏʀ O'Bʀɪᴇɴ

ΑtΜztd*~1HZa½~2t

and good night

ETHproductions

I should come up with more descriptive commit names than "debugging"

> In January 2013, Curtis Cooper et al. discovered the 48th known Mersenne prime in the U.S.

Wait, so now they're hiding in different countries? O_o

ՊՓԼՃՐՊՃՈԲՍԼ

4:09 AM

@ETHproductions ILLUMINATI

CONFIRMED

⟁

ETHproductions

ReferenceError: alert is not defined

wtf

Thomas Kwa

Hey @Doorknob

9

A: When is code that requires a REPL acceptable?

Always— but a REPL is a different language. We usually define languages by their interpreters. My Python shell is an interpreter, which satisfies our definition of a programming language. Therefore, it is a valid language. "Wait a minute", you say, "won't REPLs usually be shorter than their ful...

ETHproductions

ReferenceError: window is not defined

Thomas Kwa

can you undelete

ETHproductions

There's obviously something I'm not understanding about Workers

Thomas Kwa

4:11 AM

codegolf.stackexchange.com/a/18383/39328

^ that answer?

Doorknob

@ThomasKwa hm? 'tis not deleted

ah

Alright, seems fair

ETHproductions

4:21 AM

ctrl-r ctrl-r ctrl-r ctrl-r ctrl-r

El'endia Starman

@orlp First time I've seen that variant of "If humans evolved from apes, why are there still apes?". :P

orlp

I'm thinking about getting one of these massdrop.com/buy/infinity-ergodox?mode=guest_open

ՊՓԼՃՐՊՃՈԲՍԼ

@orlp That is sick!

DerpfacePython

4:39 AM

Hello chat!

Calvin's Hobbies

Hi

New Main Posts

4:50 AM

0

Q: Longest output in 1024 bytes or less

Your job is to generate the largest output in a program with 1024 bytes or less. Rules: Only finite lengths allowed Must be completely self-contained and deterministic In particular, standard input will be nothing Content of output doesn't matter Output consists of both stdout and stderr Pr...

code-challenge math number busy-beaver

mınxomaτ

5:32 AM

Turns out drawing is surprisingly effective:

6

A: Paint Starry Night, objectively, in 1kB of code

AutoIt, 9183.25 7882.53 UPDATE So it turns out that redrawing the image like a (drunk) toddler is more effective than storing any version of the image. (More effective than my old solution anyway). Every line that draws an element is crucial to decreasing the score. I suspect this program is ...

New Main Posts

6:32 AM

0

Q: Fictional Operators

Inspired by this question, what is the most realistic looking, fictional operator that you can come up with for your language? The operator needs to be valid syntax, but it doesn't have to do anything. Try to come up with something that would leave even an expert wondering whether there was some...

popularity-contest

Thomas Kwa

I've now made posts in two different 4-bit machine code languages. There should be a badge for that.

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8:49 AM

0

Q: Find our neighbors

You live in a rectangular neighborhood which is completely partitioned into N rectangular plots, i.e. there are no gaps or overlaps. Plots do not necessarily have the same width/height as other plots. All widths/heights are positive integers. Your goal is to output all shared edges between plots....

code-golf geometry

zyabin101

10:32 AM

5 years later...

Sp3000

tumbleweed

flawr

11:09 AM

cricket cricket

∞ years later...

Hi guys, I'm a time traveller from the past!

@AlexA. Sea otters are cute too

montereybayaquarium.org/animals-and-experiences/live-web-cams/…

zyabin101

11:29 AM

@flawr That doesn't work.

I'm making an operating system.

Ni80QZD/QZD/QZCnVmFvPQ==685393568

FlagAsSpam

4004 REP!

/o/

\o\

\o/

zyabin101

@FlagAsSpam :D

FlagAsSpam

@zyabin101 :DDDDDDDD

zyabin101

I encoded this with the following Python program:

import base64,binascii
f=open(r"C:\path\to\a.bin",'rb') # change this with path to file
data=f.read(512) # change this with file's size
data1=base64.b64encode(data)
data2=binascii.rlecode_hqx(data1)
data3=base64.b64encode(data2)
data4=int(binascii.crc32(data3)&0xFFFFFFFF)
if data3[len(data3)-1]=="=":print data3+str(data4)
else:print data3+" "+str(data4)

Bonus points for golfiness?

FlagAsSpam

11:44 AM

I'm deeply confused.

zyabin101

@FlagAsSpam The Python program encodes the file with base sixty four, then run length encodes the result. The result is again encoded with base sixty four, because I can't send unprintables in chat.

FlagAsSpam

OHHHH.

Okay.

zyabin101

A checksum is then produced using the result after the second encoding, and written at the end. If the program can golf the space between the encoded file and the checksum (the encoded file has a = at the end), golf it and write after the =. Else, write after the space.

FlagAsSpam

I get it now.

zyabin101

Done. Now try to create the inverse of the program and decode the binary. :)

zyabin101

12:01 PM

Here it is:

Well, the only content is the iPXE ident and the cursor that's happily blinking on the screen. But it works.

Two bugs/features/you decide: the floppy motor stops after the system boots, and you can Ctrl-Alt-Delete out of the system.

For kicks try compiling this assembly language code:

cli
hang:jmp hang
times 510-($-$$) db 0
db 85
db 170

This clears the interrupts flag, which is one internal of the computer that makes that so the floppy motor stops and you can Ctrl-Alt-Delete out.

Using the code above, the floppy motor will still work and you are trapped until you hard reboot.

End of operating system talk While I was uploading the image of the OS, I stuck on one ad that advertises the Delete Blood Cancer Foundation/whatever. I obviously recommend visiting their site. You can help someone.

FlagAsSpam

12:25 PM

0

A: Shortest program that throws StackOverflow Error

Vitsy, 1 byte Obviously non-competing due to language creation date. This feature of my language was entirely unintended. Because of how loops work in my language, they can be finicky if you don't match braces. So, for a one-byte solution, I give you this: [ Try it online!

zyabin101

1:18 PM

I built an (almost) working decoder for the binary format I gave a hour and a half ago.

import base64,binascii
# This decoder does not support the golfed space!
f=raw_input()
data=f.split()
data1=int(data[1])
data2=data[0]
data3=int(binascii.crc32(data2)&0xFFFFFFFF)
if data3==data1:
    data4=base64.b64decode(data2)
    data5=binascii.rledecode_hqx(data4)
    data6=base64.b64decode(data5)
    g=open(r"C:\path\to\b.bin", 'wb') # change with the output file
    g.write(data6)
else:
    raise ValueError("c")

It's in Python, and it does not support the golfed space between the = and the checksum. So you have to add the space back in the input string.

But at least it works.

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