The Nineteenth Byte - 2017-10-22 (page 1 of 3)

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12:37 AM

@dzaima Charcoal, 12 bytes: ＮθＰ←↙↓θ↖θ‖Ｍ¬

sadly Charcoal's Ｐ is nondeterministic otherwise you could write Charcoal, 9 bytes: Ｐ←↙↓↖Ｎ‖Ｍ¬

0

Q: Drawing a figure without lifting up your pen

Puzzle: Make a program that draws the following figure line by line. Your program should wait for one-second(it can be longer, just has to be a noticable difference) after drawing each line. Your program can only draw line by line (you cannot jump to another point or re-draw over a line) Given ...

code-golf graphical-output

1:09 AM

@dzaima Charcoal, 9 bytes: Ｐ↙↖¬Ｎ\‖Ｍ¬

New Sandboxed Posts

1:34 AM

0

A: Sandbox for Proposed Challenges

Puzzle: Make a program that draws the following figure line by line. Your program should wait for one-second(it can be longer, just has to be a noticable difference) after drawing each line. Your program can only draw line by line (you cannot jump to another point or re-draw over a line) Given ...

@dzaima Funky, 504 bytes Try It Online! Not at all golfed, just a proof of concept.

ooh funky is looking quite nice

proton is now officially borked; output does not work properly lol

It's like an actual language now.

Funky still doesn't have input outside of functions.

oh rip

just like make an internal input() function that like idk reads from STDIN?

It's easy for me to make, just really low on my priorities.

1:39 AM

ah ok

I am beginning to kind of regret my decision last night to make objects pure attr dicts...

but it appears that it will ultimately be easier

2:02 AM

gasp my CS class finally started doing programming!

anybody who reads the example program without any bit of prior experience is gonna be so confused by it probably lol

@HyperNeutrino pls link to example program

it's an image but I'll type it into here

(it's just hello world)

:| you can't ocr?

@Neil nondeterministic? :|

public class Main{
    /*
    *Created by J. Smith
    *on January 5th
    *to display Hello World on the screen
    */
    public static void main(String[] args){
        System.out.println("Hello World");
    }
}

0/10 not valid for PPCG hello world challenge

@HyperNeutrino how is that confusing

2:05 AM

it isn't

but they don't explain anything

well it's pretty obvious imo

the comment is definitely not code

yeah the comment is obvious

println probably means print line

main probably means default

yeah like the System.out.println("..."); part is the most obvious IMO but that's also the only part they explain lol

the only thing that really needs explaining is the access modifiers, and static, void and args

2:06 AM

yeah

and all that can be explained away as boilerplate

They should just use this example for Hello World: ++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<<++++++++++++‌+++.>.+++.------.--------.>+.>.

lol

also ew the int and short described in the course is wrong

and for float and double is says "virtually infinite" lol

wth.

like lol why

and also it's showing how to assign without explaining the declaration statements first lol

2:09 AM

@HyperNeutrino 1e304 isn't virtually infinite :/

neither is float max which is way smaller

exactly

@HyperNeutrino :|

@HyperNeutrino how do they describe it

also you should complain. about everything.

it says remainder = 27 % 5 places the value 2 in a variable called remainder

but remainder first needs to be declared lol

@HyperNeutrino well that's not wrong

oh wait nvm

I'm stupid

2:10 AM

@HyperNeutrino how do they describe int and short

it did state that but I didn't see it because it wasn't in monospace

lol the online course software doesn't offer a way to have monospace so CS courses are hard to understand

@HyperNeutrino wth.

short is supposedly [-32767, 32767]

likewise for integers; also missing one on the negative range

also question: are bytes unsigned?

yes (they're an alias for char) - signed byte is sbyte

ok good thought so just making sure

oh 10/10 language idea: make boolean have three values: true, false, and maybe :P

4

2:12 AM

@HyperNeutrino this is what null is for

oh

hacky in most statically typed languages though

@HyperNeutrino uhm... Wouldn't it be -32768?

@DJMcMayhem exactly, that's the problem he's pointing out, see following message

yeah I'm complaining that's the point xD

2:15 AM

Oh

12 hours ago, by mınxomaτ

user image

oh

right I saw that

urbandictionary.com/define.php?term=XD&page=2

:(

hey I don't use it that much

chat.stackexchange.com/search?q=xD&user=281362&room=240 maybe that's not true

but in comparison with "lol": chat.stackexchange.com/…

anyway brb o/

2 hours later…

4:08 AM

@Lembik srry wasn't on for a while

hi

I think you're right about n

3 hours later…

6:58 AM

Hello

1 hour later…

Erik the Outgolfer

8:01 AM

heh first version of jelly ever

8:49 AM

@ASCII-only it puts the multidirectionals in a set, so the result depends on how the set gets enumerated, and that looks like it's random in python

2 hours later…

10:49 AM

"Trichoplax ... made me ... start programming in javascript" My evil plan is working :)

11:06 AM

19

Q: Optimize sorting, using "Sub-vector reversals"

This is a fewest-operations challenge where the objective is to sort a vector into ascending order using the fewest reversals. Your algorithm can only sort the vector using "sub-vector reversals"1, but it can use other operations for arithmetic operations, loops, checking if it's sorted etc. The ...

sorting optimization fewest-operations

500 rep still up for grabs!

11:16 AM

0

A: Build an aesthetically pleasing divisor tree

Charcoal, 305 bytes ≔⟦⟦Ｎ⁰¦⁰¦⁰⟧⟧θＦθ«≔§ι⁰ζ≔⟦⟧ηＦ…·²Ｘζ·⁵Ｆ¬﹪ζκ≔⟦⟦κ⟧⟦÷ζκ⟧⟧ηＦη«⊞κ⊕§ι¹Ｆ²⊞κ⁰⊞ικ⊞θκ»¿η⊞υι»≔…⁰⌈Ｅθ§ι¹ηＦ⮌η«§≔ηι⊕⌈Ｅυ∧⁼§κ¹ι÷Σ⟦¹§§κ⁴¦³‹⁹§§κ⁴¦⁰§§κ⁵¦²‹⁹§§κ⁵¦⁰±ＬＩ§κ⁰⟧²ＦυＦ²§≔κ⁺²λ⁺⁺§ηι∨⊖ＬＩ§§κ⁺⁴λ⁰¦¹§§κ⁺⁴λ⁺²λ»Ｆυ«§≔§ι⁴¦²⁻⁻§ι²§η§ι¹∨⊖ＬＩ§§ι⁴¦⁰¦¹§≔§ι⁵¦²⁻⁺⁺§ι²ＬＩ§ι⁰§η§ι¹‹⁹§§ι⁵¦⁰»Ｆ⊕Ｌη«Ｆθ«Ｆ⁼§κ¹ι«←⸿Ｍ§κ²→Ｆ‹⁴Ｌκ«↙Ｐ...

12:04 PM

hello

the is missing a challlenge for Leaderboard by language

where the input is a language and then it appears:

1. User1 100000
2. User2 99999

and so on

s/the is/there is

“Is there” is probably what you’re looking for

And I think a snippet exists, but not a userscript

12:19 PM

@ASCII-only What language is that? I thought HyperNeutrino was learning Java?

@HyperNeutrino Actually, I once needed something like this for generating complex MT19937 seeds but I never got around to making such a language or library because I'm lazy

@user202729 :| ok maybe Java doesn't have sbyte

@Neil Not exactly random, but :/ right I get your point (kinda busy now though, sorry)

@Neil Ouch, barely better than Python

12:39 PM

So I tried to solve A000512 with Squirrel but my method of checking for equivalence by sorting the thing probably doesn't work and it timeouts for n=5 so I can't check it very well, if anybody wants to adopt this abomination, go ahead.

You can also insert the link directly into the message, though. (press Shift+Enter)

it told me "this message is too long"

and markdown doesn't work for multilines, right?

I guess I could've made it work, but bit.ly was the first thing to come to my mind so w/e

Yes, markdown doesn't work for multilines. However multilines allow longer message.

So you can post separate message for markdown and the url.

the only markdown was []()

bold (double asterisk) , ~~strikethrough~~ (triple dash) and italic (single underline).

12:48 PM

the only markdown as in the only markdown in that message

Question: Does a matrix only have one "sorted" state?
In other word, can two different sorted (each row is sorted and each column is sorted) be equivalent?

no idea

"equivalence is defined by row and column permutations"

the approach of sorting a 1-dimensional array would work if this was about 1-dimensional arrays

I am currently sorting each row and then I'm sorting the rows like strings

i. e. find first differing element and compare those

(that's called lexicographical order)

The result is no, unfortunately.

Test TIO link (Mathematica):
https://tio.run/##fY/BisIwEIbveYqfLHgKqIcFcRE8iKAnUW/THIKNNWATSbOwIH32Oml7cRf2ksyf@fIxU5t0s7VJ7mK6roquxAocUdD221@SC17jlKLz1T44T0d3vd4tYbzPYehhusaHgoTUk1xnA8fCS62/hMhxhaPxZah3PtnKRnrOFOatwnOhsGgzdWBTIsiB5r8K/UCDLhObQAMFgpBNiMmWWPakGNGt@7HlIWTTnzWYp/7gji7oHI1vHqGx@i2wC@OsJ1M/eEvOv17@FWihBe/lFD5bLkXXvQA

So the approach of sorting the rows and columns will not work, the resulting sequence may be A079815 or any other values >= A000512 instead.

CMC (code-golf) : Given a list of numbers A, and a number L. Find the partition of list A into multiple sublists such that the product of each partition is at most L, and the number of sublists is minimum.

1:17 PM

WTF is this??? github.com/beali

@officialaimm :O ~~ghost~~ bot

alternatively, all repositories of this user are private

either way he's following and starring an insane number of things

Must have fallen through the cracks, GitHub's bot detection is usually quite good.

how can 310 people follow them

1:28 PM

@Okx :| idk I guess just follow-back?

Follow all, hope for a few follow backs. That's how almost every bots work. And also the reason Twitter is mostly crap nowadays.

1 hour later…

2:34 PM

Huh I'm tempted to troll my CS teacher by golfing all of my programs...

caird coinheringaahing

@HyperNeutrino Do it :P

the teacher never said anything about program form :P

caird coinheringaahing

I wish we had that with our CS :P 10/40 marks in our controlled assessment are for "readable, clear and commented code"

I wish I had that at work.

Only for me though, not for anyone else.

caird coinheringaahing

Jelly rickroll: https://tio.run/##HVRpUxNLFP0tYoHiylMWlbCDsjyCRgQBQUVBEFQUxAcIxaAkmsjTJFUs1iNMIAkFBiRBklkCVHVPumbyLzp/hHeaL8lM0n3vuWe5L/uGhydOTrKz/5E4OXzUmTNqpcwI2cpKCtcXuObPzHF1sYNrClc@Pf6n/25W0uxcPR4e5kq8qIerQbpGDulS@/gFrixw1fmin@uhCrJnJsn6Fa6ELZkGUCwjt3HtazlXQlbqEddkrgXNZEFNfw1XNshGVjp8wdwsXP@GBnCd6@62ntIzXHPnAMSdsV6uzpa9f9NzyVjCE4kXP6tEdzOEA1z7YizesJW3c/3PqyeWnwTbmJurn5nUyLXvdekUkBsespvLlc9sNa@JK4meqb5B6gTaiXqcNSNsla5xVbbf/MCVAB6VNTGtppy1kShdNtwlXHHns2W2it7jYCSPhPHlbGBf0GfyoYOrS0BZKbAt0STbQQuydS4rHXRy7V8j9qHNkHMNN3N3tV9g3ryWGzT2tIwccuXbZHr2LWo/4cr8ND161A0yjVjGg6pdGK@ARFjIRhUrxdWVVuoczmP…

2:42 PM

Could y’all read through this question and vote to reopen if it looks fine to you?

caird coinheringaahing

@Lynn Already VTRO'd

Re-opened.

Inserted a single space at the beginning of the compressed string
https://tio.run/##HVRrU1JbGP4rJxstux1PeanEu5aXIxaZpqaVpWlSWZodNR23JRTkKWDGS3NEUMDR0AAT9gV1Zq3Nmr35F4s/4nmWX2BvWOt9n/e5vC8G7PbJk5Pc3H9/kAQ5fNidN2amjQjZzkky1xa56svOc2Wpi6sylz8@@mfwTk5SrVw5ttu5nCjp40qQrpNDutw5cYHLi1xxPB/kWqiKxIwU2bjC5bAZoH4UywY6uPqlksshM/2QqwGuBo1UUd1gHZc3yWZOOnzOXCzc@Jr6cZ1rro6@8jNcdeUBxO3xfq7MVbx73XdJX8YTSZQ@rUZ3I4QDXP2sL123VHZy7ffLx6aPBDuYiyufmNTM1W8NmTSQ626yl8/lT2ytoIXLyb7pgWHqANrJRpw1ImyNrnMlYL3xnst@PMrrYlpVPmshUbqiu8q47CpkK2wNvSfASAEJ48vRxD6jz9QDG1eWgbJaYFumKbaLFmT7XE466Obqv3r8fYceyNddzNXTeYF5Ctqu0/iTCnLI5…

caird coinheringaahing

@HyperNeutrino The Jelly compressor is weird :P

last word is a suffix of your username :P

@cairdcoinheringaahing agreed :P

caird coinheringaahing

@HyperNeutrino My entire username can be got from the decompressor

2:46 PM

huh cool

caird coinheringaahing

So can yours :P

yay :P

CMP: Should I golf my CS homework?

caird coinheringaahing

@HyperNeutrino It's “ḥknI8» FWIW

@HyperNeutrino Yes

yay

caird coinheringaahing

And mine is “ṛ⁾uỊ[Ñ³ḞⱮ<0»

2:47 PM

@HyperNeutrino Yes!

> PRV.04 use proper code maintenance techniques and conventions when creating computer programs;

I'm wondering whether or not golfing it is considered improper code maintenance.

caird coinheringaahing

@HyperNeutrino -1 "proper" is subjective

lol

IMO golfing is the only proper way of creating code

Golfed code is easier to maintain for obvious reasons; there's less code to look through.

caird coinheringaahing

s/maintain/create

golfing is a convention for golfing languages

and no one said one cannot use git for jelly

caird coinheringaahing

2:48 PM

CF*ck

wtf

caird coinheringaahing

I found out the other day that I can use Jelly for my A-Level CS project \o/

@Lynn I've added a comment suggesting an optional clarification, but it reads well and seems unambiguous to me.

Ah, but empty programs are already ruled out in the first paragraph.

I'd ask my teacher but a) he'll never respond and b) he'd've said no:P

caird coinheringaahing

2:50 PM

My teacher said, and I quote, "You may use any language you want"

so nvm not going to golf it i'd rather not lose marks unnecessarily :P

@cairdcoinheringaahing yo use unary

caird coinheringaahing

@HyperNeutrino ಠ_ಠ

but jelly looks more confuzzling :P so use jelly actually :P

@HyperNeutrino Only if it's too easy for you and you want something else to do.

caird coinheringaahing

Just submit as my final project:

1111111111111111111111111111111111111111111111111111111111111111111111111111111‌111111111111111111111111111111111111111111111111111111111111111...111111111

2:52 PM

@user202729 ha it's so easy keep in mind that I started coding in Java about 3 years ago lol

caird coinheringaahing

@HyperNeutrino In that case, golf it. It really won't change aside from a bit less whitespace :P

ಠ_ಠ

yo how do you run a program in netbeans

why do we have to use netbeans ;-; I only know how to use eclipse and CLI

caird coinheringaahing

Although, I feel sorry for you. My current CS homework is learning to convert between binary, hex and decimal

oh rip

@cairdcoinheringaahing Me too.

2:55 PM

mine is learning how to print a string

(well ok maybe I'm exaggerating a bit but still)

(side question: is there keyboard shortcut list for chat.se?)

caird coinheringaahing

Not to mention a few bitwise commands. We need to know & and | IIRC

@HyperNeutrino But you said that you've already learned grade 12? Why do you still have to learn those things?

huh?

I'm doing grade 11 Intro to CS

the only reason I'm doing it is so I can do grade 12 CS

also halp I made a public class with a main method in netbeans but I can't run it

Oct 18 at 1:35, by HyperNeutrino

@user202729 Nope. Grade 12 is probably what I learned 2 years ago. Headstarts are both great and boring.

@HyperNeutrino VTC as lack of context (unclear what you're asking)

2:58 PM

;_;

At least you should have a screenshot or copy of the output log?

caird coinheringaahing

> I dream of a world where a chicken can cross the road without having his motives questioned

it just says "no main classes found"

caird coinheringaahing

Legit, 100% laughed at ^^ :P

Did you just assume the chicken's gender?

2:59 PM

Make sure that you included the file into the project, and (the following things you should already knew) your class is public, and class name is the same as the .java file.

yup checked all of those

but wait what do you mean by including the file into the project

Post a screenshot of your Netbeans window to be sure.

Also this may be helpful. stackoverflow.com/questions/20601845/…

(probably you've read already, too)

user image

keep in mind main has to be static

@NieDzejkob HyperNeutrino learned Java 3 years ago, they must have already known that.

3:03 PM

@Lynn Thanks - I managed to overlook that

Comment deleted

@HyperNeutrino Open the "Projects" tab? (on the left of the screen)

user image

caird coinheringaahing

@HyperNeutrino ಠ_ಠ

0/10 that looks weird

@cairdcoinheringaahing Avoid excessive smile face. The image takes too much area.

3:06 PM

also 0/10 for huge onebox lol

^

@cairdcoinheringaahing :p

there's nothing wrong with the program; it works perfectly when I use javac and java on it

I knew. It is just netbeans problem.

ok

oh I think I need to make a package

When you create the project does it create a src folder in the project folder?

3:08 PM

nope

nothing is happening to the Projects tab lol

Weird. On Windows all source files are put in src folder.

huh

So you can try creating a src folder inside and move the .java files there.

tried that, didn't help

give us a screenshot of each page of the project creator wizard, maybe?

3:12 PM

Sorry I don't use Linux so I can't help further.

This may be useful stackoverflow.com/questions/7597495/…

oh I'm dumb

I made the wrong type of project

3:27 PM

Can anyone explain this program: :‘×µ\ - where the µ is described as Turn the previous links into a new monadic chain - I thought µ affect what comes after it, not before it? So exactly how ¤ µ ð works?

(Jelly) Source: codegolf.stackexchange.com/a/71537

Well it starts a new monadic chain but in doing so effectively terminates the last one

@ATaco: where is the snippet?

Looks like it should be Turn the previous links into a new dyadic chain instead. \ expects a dyadic.

4:15 PM

@user202729 You should get a custom username :P

@HyperNeutrino It is custom.

oh?

Other people complains about this a lot, but I say the number is not meaningless, and not automatically assigned by SE.

oh huh right it's different from your id on all communities

caird coinheringaahing

@user202729 What does it represent?

4:22 PM

I won't say that (that = "what does it represent"), but certainly not a index to some wordlist, or baseXY-encoded word.

(that is, the numbers are meaningful by itself, and not by an alternative means)

Is it the last 6 digits of your SSN (lol)

well I just finished all of the work for my CS course and now I have nothing to do until the teacher releases the next assignment lol

I haven't gotten back any marks yet...

4:38 PM

Could I get someone to help me generate test cases for an upcoming challenge?

my computer is not fast enough

I'd be willing to try but I'm not sure how good my computer is.

My computer is 8 years old so its probably better than mine :P

lol

https://tio.run/##ZVI9b8IwEN39Kw6JwVYVlKwR6dahW7cOkQGTmGLh2FZiKFT8d3rGTorokvO9@3jv7rIXw0FqfbudZK92F9Bq8GAIXKGDZaal@fL7CFbRzGZAO9sCNS8Fg45B9S@Qjb4JCYSo4cMq42U/NhJa0wc@VueLxQNVVnBCWrkVgwQDwQQ9pqpyrK15cKzfy/5bYUIFgTSmlamItuqUIBbriYsKBoQraGV7dFDX@fW8zOpisTCcc5jDTumg8k/vBFFj/ZuWHeRs3gkHdBOpNjhibVY4c8Gwzcok7aF/s5fNQbaoGCmT8xSi3rryaJLLwmTCXID21gsvtloCJrApfVQ@@lPl80pi2r372PshmdzbSyhLeDcesleoBU9mjK2j7HoCDJwHBH6U@1R4p8YaPCVte@swRJtLg2LPA2P4SQR3/QK2WCXD6ra4zrE8TojXCdvnSHxdx0uk30BwfuuEuh/LEtDSg8P3dMWCgOvxjS1ThRsRd/sF

That's the code, replace the 1 near the bottom with a 9

you mean the 1 in the footer?

4:42 PM

yeah

also how do you run haskell from cli (linux)

@WheatWizard ok

@HyperNeutrino compile with ghc

You should probably use ghc -O3 filename.hs

ok

Hold on is that a capital letter o or a zero

GNU Haskell Compiler?

And my computer finished the 9th case

4:45 PM

@HyperNeutrino Capital O

@HyperNeutrino Capital o, could you bump it upto 10?

O0O0O0.

ok I'll do that once i get this working

@wizzwizz4 Glasgow Haskell compiler

@HyperNeutrino Thanks!

No problem :)

ok after compiling how do I run

4:47 PM

./filename

You should probably pipe it to a file though

./filename > output.txt

@WheatWizard I got 0.8 secs for 7 and 17.2 for 8. It's not looking very good complexity-wise.

ok

@H.PWiz Its certainly not very good.

[n^(n-1)..n^n-1] is why

started running

Ok thanks!

4:49 PM

np :)

If its taking too long feel free to kill it. I don't really know how long it will take.

ok

I'll keep it running til like tonight sometime (about 1PM here right now)

Oh wow, thanks

should be done by then :P

do you want me to run 11 if it finishes and I notice?

eh, 11 might take way too long to run

4:53 PM

ok :P

I'm starting to think that maybe if these take so long to compute they might not be very useful as testcases.

lol that could be the case

But hopefully I'll submit this to OEIS and then terms could be useful.

ah ok

hold on what is this for?

Its for a challenge I'm writing right now

4:57 PM

ah cool

I haven't posted it yet

Still writing the spec

ok

@WheatWizard have you got an answer for 9?

@H.PWiz Yes

1049

1049?

4:59 PM

yes

wait so out of curiosity why did you advise me to pipe to output?

The output might be a little big :P

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The Nineteenth Byte

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