The Nineteenth Byte

Dmitry Kudriavtsev

00:01

That is NOT a dupe

trichoplax

To determine if a challenge is a duplicate, ask "Can answers from one question be copied over to the other with little or no modification and still be competitive?"

Dmitry Kudriavtsev

And no, they can't.

trichoplax

Any challenge which asks for a string of consecutive characters seems as if it could be answered by code that is identical apart from the numbers specifying the start and length of the string.

That seems like little modification

Dmitry Kudriavtsev

It's not consecutive though.

There are outliers

xnor

just Ё, right?

the greek challenge also has outliers

trichoplax

00:07

If it's not consecutive I recommend mentioning that in the challenge, but I agree with the comment on the challenge that a single extra character doesn't add a great deal

Dmitry Kudriavtsev

yeah, I saw your comment

Makes sense

Idea: "Implement the xnor logic gate"

Jonathan Allan

@NathanMerrill - what's with the "loop around"? - it looks like we just take the top-left from the post.

DJMcMayhem

@DmitryKudriavtsev my two cents. The Hebrew one is interesting because it was the original. The flag challenges are fine because they aren't beating a dead horse (anymore) and they are all drastically different outputs that demand different approaches

Dmitry Kudriavtsev

OK

xnor

i'm actually a bit skeptical about the flag challenges too

i don't think all of them brought someone new enough to just yet another flag challenge

Dmitry Kudriavtsev

00:10

@xnor what do you think about the idea of base conversion compression codegolf challenge

New Main Posts

2

Q: Trick or Treat Code Golf

Since Halloween is coming up I though I might start a fun little code golf challenge! The challenge is quite simple. You have to write a program that outputs either trick or treat. "The twist?" you may ask. Well let me explain: You program has to do the follwoing: Be compileable/runable in tw...

DJMcMayhem

But there's like 5 of them across a long time. Alphabet challenges are like 30 all in the space of a week or two

xnor

@DmitryKudriavtsev is this in the sandbox?

Geobits

Oh cool. It's not every day I get to use the 'rollback' button.

Dmitry Kudriavtsev

No

I actually submitted some things in the sandbox and got 0 feedback

trichoplax

00:11

@DmitryKudriavtsev Feel free to post one of them as a link here if it has been a few days without feedback

Dmitry Kudriavtsev

Not very fleshed out though.

xnor

yeah, the sandbox has not nearly enough eyes for all the challenges in it

DJMcMayhem

@NewMainPosts You know what would make this challenge really awesome? A cops-and-robbers where you reveal the "treat" language and robbers have to find the "trick" language

trichoplax

@DmitryKudriavtsev Sometimes it helps to get feedback before too much fleshing out. Sometimes I put just the outline of an idea in the sandbox to see if it's feasible. That way I don't have to put much time into the ones that won't work out, and can focus on the others

Dmitry Kudriavtsev

0

A: Sandbox for Proposed Challenges

Write machine code that also works when left rotated one byte Write machine code for a CPU that runs and does something. The twist is that your code should run and do something else, without errors, if it is left rotated one byte. code-challenge

Jonathan Allan

00:14

@NathanMerrill - re-reading I think I get it, are "the single line" and "the single line repeated N times" input and output receptively? (I thought they were separate examples)

Geobits

I like to hit up the sandbox every couple of days and scroll down for a while. I assume others do similarly, but don't know for sure. If it was at all usable in the mobile appp I'd probably check it more often.

You weren't joking when you said "not fleshed out" :P

Dmitry Kudriavtsev

It's all I can think of for that challenge

trichoplax

Is the intention to settle on two parallel tasks so that everyone has to do the same thing?

Dmitry Kudriavtsev

No, just make it work somehow

trichoplax

That sounds too broad

We have had challenges in the past that only set a restriction, and no goal, and although they were fun they aren't on topic anymore

Dmitry Kudriavtsev

00:17

It's a code-challenge

Not a code-golf

Geobits

Also, while it's okay to leave it a bit unfleshed when posting to the sandbox, you need more than "Write machine code that also works when left rotated one byte -- Note to self: Add description later." as the entire text. That's most likely why you didn't get feedback.

trichoplax

A code challenge still needs a defined specification with an objective winning criterion, it just means you can specify your own criterion rather than using something like golf

Dmitry Kudriavtsev

@Geobits I edited it. Probably cached on your end.

Geobits

No, I saw the edit, but the timestamp said you edited it after saying here that it got no feedback.

Dmitry Kudriavtsev

nevermind

Geobits

00:19

meta.codegolf.stackexchange.com/posts/10395/revisions

Dmitry Kudriavtsev

i see

trichoplax

Note that it didn't get any up or downvotes, but that doesn't mean no one saw it. I actually saw it yesterday but couldn't think of anything useful to say so I thought I'd wait and see how it developed

Geobits

Right, that. It's hard to give good feedback when it's just a vague blurb

Do we really not have a dupe for print two things in two languages? I could've sworn it had been done more than once.

trichoplax

Giving just a brief outline can sometimes lead to someone pointing out a fatal flaw. If no one gives any feedback for a few days, then you can add a bit more and see how it goes. If there's not anything glaringly obvious then getting no feedback is common

Downgoat

:O SE Status twitter account has incorrect representation of SE name

it should be "Stack Exchange"

Dmitry Kudriavtsev

00:23

I think there's a 20 character limit

trichoplax

This is similar:

137

Q: I'm not the language you're looking for!

Isn't it annoying when you find a piece of code and you don't know what language it was written in? This challenge attempts to somewhat solve this. Challenge You will have to write a program that when run in two different languages, will output the string: This program wasn't written in <lang...

code-golf polyglot

Jonathan Allan

@NathanMerrill - so the task is to reproduce the pattern given with an alphabet from A to Alphabet(N) I see. That's not so easy :p

...I guess I should sleep if I cant understand that ^^

trichoplax

About time we had a non-trivial alphabet challenge

Geobits

New Challenge Posted! Print the alphabet using this bucket of sand.

trichoplax

Do we have to make our own silicon chips?

Eᴀsᴛᴇʀʟʏ Iʀᴋ

00:31

@quartata do you know what quit is in Jolf?

i.e. what char for that command

nvm, ( works

Geobits

@trichoplax You can if you want, but it'll probably be quicker to just push the sand around until it resembles letters. I forgot to mention, it's [fastest-output], not [code-golf].

Nathan Merrill

@JonathanAllan right. The "loop around" means that you should print

ABCD
BCDA
CDAB
DABC

instead of

ABCD
BCDE
CDEF
DEFG

Jonathan Allan

yep I got it - too tired to figure it out :p

Nathan Merrill

ok :)

your submission was correct for nearly all of the examples, though

Jonathan Allan

heh, dumb luck

Dmitry Kudriavtsev

00:41

have we had a c compiler challenge before?

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@ConorO'Brien FOG answer

0

A: Trick or Treat polyglot

FOG / Jolf, 16 bytes a"trick""treat"X Simple. In Jolf, a means print the string after it and disables auto-output. (not really the last part, but yes in this situation) The other 2 commands are ignored pretty much. (X uses JS eval, and "treat" also gets a string ready to use in a function. ...

Helka Homba

@DmitryKudriavtsev idk but sounds like lots of work

Dmitry Kudriavtsev

i know, but have we had one?

you dont need to implement the libraries

feersum

But you still need to be able to link with them somehow, which is the nasty part.

trichoplax

@DmitryKudriavtsev We mostly try to make challenges language agnostic, so that all languages are welcome even if not every language will be suitable for a given challenge. There are still challenges about a specific language, where any language can be used to solve the challenge. For example:

26

Q: Tiny Lisp, tiny interpreter

Lisp programmers boast that Lisp is a powerful language which can be built up from a very small set of primitive operations. Let's put that idea into practice by golfing an interpreter for a dialect called tinylisp. Language specification In this specification, any condition whose result is des...

code-golf interpreter recursion

Dmitry Kudriavtsev

00:48

@trichoplax The challenge is to write a C to ELF binary compiler.

trichoplax

Which standard of C?

Could you use a subset of the standard?

feersum

You can't get a binary without having a linker also.

trichoplax

Not only is the full standard extensive, but it would be difficult to verify that a submission is correct

feersum

Of course you would use a subset.

Helka Homba

@DmitryKudriavtsev Could you envision solving it and attempting to golf it within a day? If not then it's probably too complex to be a challenge.

Dmitry Kudriavtsev

00:51

@feersum Linker would be GNU binutils ld. It would of course be a subset.

feersum

So you would be targeting object code, not an ELF binary.

Dmitry Kudriavtsev

yeah actually, I can see why that would be hard.

You would not need to link the binaries

feersum

Maybe it could be better to have the challenge be to compile one function.

And no function calls within.

Dmitry Kudriavtsev

yeah.

No function calls, unions, structs, casts, or pointers.

Variables all declared at beginning of block

feersum

Personally I would include pointers.

Dmitry Kudriavtsev

00:56

Sure

feersum

Otherwise, it might as well be a Java compiler.

Dmitry Kudriavtsev

not really

java treats variables way differently, sorta like python

feersum

And parsing types like int (*x)[10][20] is the best part :)

Dmitry Kudriavtsev

ikr

SHould I sandbox it?

feersum

Only if you are willing to put a lot of work into the spec.

Such as writing a grammar for the C subset.

Dmitry Kudriavtsev

01:01

ugh.

trichoplax

Post it in the Secret Santa's Sandbox so someone else can do the hard work ;)

Dmitry Kudriavtsev

maybe say that it should input these test cases and output object code that when linked and run, it produces this output?

trichoplax

What is the winning criterion?

shortest, fastest, something else?

feersum

Golf, I assume.

Dmitry Kudriavtsev

yes

trichoplax

01:07

So the submission can be in any language, and the length of that source code is the score? (Not the length of the compiled code)

Dmitry Kudriavtsev

Yes

Don't see how a Pyth answer would work though

trichoplax

It doesn't have to be realistic in every language to count as language agnostic :)

Dmitry Kudriavtsev

0

A: Sandbox for Proposed Challenges

C Compiler Implement a basic C Compiler. You do not need to implement the libraries. Compiler would output an object file containing a function, that would be linked with some libraries using GNU binutils ld and run. No function calls, unions, structs, casts will be used in the test cases. Te...

trichoplax

It's worth including the correct output with each test case

DJMcMayhem

I was just about to say that

Zacharee1

01:20

you guys have literally 1 item in review?? o_O

DJMcMayhem

There were 3 just a minute ago. I cleared it out.

I'm pretty active in the review queues

Zacharee1

let me just say how lucky you are askubuntu.com/review

trichoplax

Some things take more than 1 person before they drop off, but they don't usually stick around for long

Zacharee1

But where are all your CVs?

Downgoat

Node.js v7 is out!

2

trichoplax

01:22

@Zacharee1 They tend to get closed in minutes here

Zacharee1

o_O

DJMcMayhem

We barely get 10 Q/D around here. And most users are active so they get closed really quickly

Zacharee1

Can you all, like, come over to AU, make 3k rep and help us out? :p

DJMcMayhem

I've seen a question closed in 36 seconds without mod-help

Geobits

I'm never going to get theose shiny review badges here :(

Zacharee1

01:23

You will on AU

I'm on 953 CVs

over 1k LQs

DJMcMayhem

@Geobits It's not that hard

Zacharee1

wait, how new is CG?

DJMcMayhem

5 years ish

Conor O'Brien

@DJMcMayhem there are 7 distinct people on that list :P

Geobits

@DJMcMayhem It's the 15th rarest badge here...

Zacharee1

01:25

why are there only 4 mods, all elected 2016?

DJMcMayhem

Because of graduation

Geobits

2016 was graduation

Zacharee1

ohh

DJMcMayhem

And flag-load presumably

@ConorO'Brien I counted 6.

Zacharee1

so you've been in beta?

DJMcMayhem

01:26

Makes me proud to be one of the few

Eᴀsᴛᴇʀʟʏ Iʀᴋ

yes

@Zacharee1 but not anymore

but still no design

Zacharee1

alright, that makes a lot of sense

Eᴀsᴛᴇʀʟʏ Iʀᴋ

like 9 months later it feels like

Nathan Merrill

@DJMcMayhem is it really "few"?

DJMcMayhem

42

A: The Many Memes of PPCG

Meme: Graduation Originator: Geobits Cultural Height: Sept. 26, 2014–Feb. 23, 2016 Background: Geobits, a known and "loved" user, tried to convince people that PPCG is set to graduate during PPCG's beta. An often used date is November 1st.

trichoplax

01:27

We won't have a full design until Tuesday

8

Conor O'Brien

you scoundrel

Downgoat

@trichoplax :O wait wat rly how do u know dis

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@Downgoat that's november 1st

Geobits

Because that's November 1st....

Eᴀsᴛᴇʀʟʏ Iʀᴋ

>_>

Conor O'Brien

01:28

@Downgoat look at your calendar for next Tuesday

Dmitry Kudriavtsev

we have a full design

Eᴀsᴛᴇʀʟʏ Iʀᴋ

ninja'ed

@DmitryKudriavtsev no we dont

Downgoat

@EᴀsᴛᴇʀʟʏIʀᴋ DAMMIT

Dmitry Kudriavtsev

it's called a userscript

Geobits

That's the opposite of a full design

And most people don't use it

DJMcMayhem

01:28

I love the description.

> A known and "loved" user...

8

Downgoat

@Geobits that is their problem

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@DmitryKudriavtsev 1. I made half that and I feel that that doesn't count. 2. that's not close to full.

Zacharee1

hey, more alphabet challenges

Dmitry Kudriavtsev

crap

Geobits

@Downgoat Not a problem here :D

Dmitry Kudriavtsev

01:29

how to copy from vim without this BS?

trichoplax

I have no intention of using a userscript until we get a brand new design that I don't like

10

DJMcMayhem

@DmitryKudriavtsev "+y<motion>

ΛεγίωνΜάμμαλϠΟΗʹ

^^

Dmitry Kudriavtsev

#include <stdio.h>

int test(int i, int j) {
  int x[10][20];
  int s = i + j;
  i = 0;
  j = 0;
  for(i = 0; i < 10; i++)
    while (j < 20)
    {
      j += 1;
      x[i][j] = i * j;
    }
  for(i = 0; i < 10; i++)
    while (j < 20) {
    s += x[i][j];
  }
  return s;
}

int main() {
  printf("%d\n", test(1, 9));
  return 0;
}

ΛεγίωνΜάμμαλϠΟΗʹ

I've never been a fan of userscripts

Downgoat

01:29

> Downgoat, a known and a user taken "seriously"

:P

Dmitry Kudriavtsev

@DJMcMayhem THat just copies inside vim

not outside

Zacharee1

@DmitryKudriavtsev I think that can be asked about just using vim in the first place :p

Dmitry Kudriavtsev

wat

DJMcMayhem

... yes? I thought that is what you wanted?

Dmitry Kudriavtsev

I have so many plugins

@DJMcMayhem I meant to the clipboard.

ΛεγίωνΜάμμαλϠΟΗʹ

01:30

@DmitryKudriavtsev Wudduzitdo?

Dmitry Kudriavtsev

@Zacharee1 I'll post a list of all my vim plugins

DJMcMayhem

Yeah, "+ is the clipboard register

Geobits

@DJMcMayhem I keep wanting to link to a chat message about the design date in the comments there with "What is dead may never die", but it keeps staying locked :(

Downgoat

@DmitryKudriavtsev select text and do y

Zacharee1

@DmitryKudriavtsev noitsokrlyidontneedtoseethat

Dmitry Kudriavtsev

01:31

OH.

THanks @DJMcMayhem

@Zacharee1

Downgoat

btw make sure to add set clipboard=unnamed to vimrc. then you can just do y

DJMcMayhem

@Zacharee1 Ping the wrong person?

Zacharee1

@DJMcMayhem yeppers.

@DJMcMayhem tab completion gets me sometimes

Dmitry Kudriavtsev

hastebin.com/iqafuxereg.txt

DJMcMayhem

Not a big deal.

Zacharee1

01:32

@Downgoat Bloggoat lol

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

C Compiler Implement a basic C Compiler. You do not need to implement the libraries. Compiler would output an object file containing a function, that would be linked with some libraries using GNU binutils ld and run. No function calls, unions, structs, casts will be used in the test cases. Te...

Dmitry Kudriavtsev

My code refuses to work

trichoplax

hastebin? Did you type that too quickly?

DJMcMayhem

@DmitryKudriavtsev My plugins

Dmitry Kudriavtsev

Just outputs "10"

Downgoat

01:33

@DmitryKudriavtsev do you believe it works?

@Zacharee1 It should really be called "Downgoat" because of all the down-time it has because WP keeps crashing

owait

Zacharee1

@Downgoat use Weebly :D

Dmitry Kudriavtsev

no, it should output 1*1 + 1*2 + ... + 2*1 + 2*2 + ... + 9*9

@Downgoat I like wordpress

Downgoat

@Zacharee1 nah, not enough customizability

i tried switching to ghost but apparently their init script doesn't support debain

Zacharee1

@Downgoat twas but a joke

download a free template and edit in Brackets

Downgoat

:|

Zacharee1

01:34

it's what I did. Works great

Dmitry Kudriavtsev

@DJMcMayhem license-to-vim lol

Downgoat

@Zacharee1 s/Brackets/vim

ftfy

Zacharee1

ewwwwww

DJMcMayhem

@DmitryKudriavtsev Haha, that was from Alex

Downgoat

@Zacharee1 ಠ_______________________________ಠ

Dmitry Kudriavtsev

01:35

Never liked vundle

Downgoat

@trichoplax pls kick @Zacharee1 for blasphemy :P

DJMcMayhem

I don't use vundle

Zacharee1

@Downgoat "How do I exit this thing? Hmm" `rogihgrqefwg'''egphiefqrpwignqefefq;'''';;;;^C^C^C^C^C^C^X^X^X^Xoegwgongvrbwewf‌;qe;q;q;gw;rb;qef;b;qq^WWWWW

trichoplax

@Downgoat I take no side in your religious wars :P

4

Geobits

I do! But I'm also not a vim fan, so...

Downgoat

01:36

@Zacharee1 it is better than people in brackets. "Down arrow, down arrow, down arrow, down arrow, right arrow, right arrow, right arrow, right arrow, right arrow, right arrow, right arrow". Where as in vim you can do 4j7l

or just run :set mouse=a and use cursor

Dmitry Kudriavtsev

github.com/dkudriavtsev/vim-plugin

Zacharee1

Are we talking about the same Brackets? @Downgoat

Dmitry Kudriavtsev

my own plugin manager

DJMcMayhem

@Downgoat mouse=a is default

Downgoat

oh :|

Zacharee1

01:38

Because I can use my cursor in brackets

Downgoat

you can do that in vim too

@Zacharee1 brackets.io <- this one?

Dmitry Kudriavtsev

@Zacharee1 It gives you a message to use :q! if you try ctrl+c

Zacharee1

@Downgoat yeah

DJMcMayhem

Also, bragging about needing to change a setting to use your mouse probably won't win very many people over. :P

2

Zacharee1

@DJMcMayhem ^

Dmitry Kudriavtsev

01:39

@Zacharee1 You can use vim anywhere, over ssh, in a tty, etc.

Not brackets

Zacharee1

@DmitryKudriavtsev which is why I tend to edit my HTML using SFTP or locally

Dmitry Kudriavtsev

In a tty you can even use gpm for mouse support <3

Zacharee1

if I have SSH, I have SFTP

Dmitry Kudriavtsev

HTML? Why?

Also, what if your x server is not started yet?

DJMcMayhem

As an avid vim user: "Who cares if somebody wants to use a different editor? It's their workflow and their choice."

Zacharee1

01:40

What else would I use Brackets for in the context of web development? Java?

Dmitry Kudriavtsev

web development. ah.

Zacharee1

@DmitryKudriavtsev It'll never be started. I'm using Windows

Dmitry Kudriavtsev

I use rails.

@Zacharee1 Aren't you an avid user of AU?

Zacharee1

@DJMcMayhem but..... pointless arguments...

Dmitry Kudriavtsev

Also, Xming and Cygwin/X are a thing

Geobits

01:40

Not anymore. He got kicked for using windows.

Dmitry Kudriavtsev

lawl

Zacharee1

@DmitryKudriavtsev Just because I don't use Ubuntu all the time doesn't mean I don't know how it works :p

also, VMs

plus dual-boot

@DmitryKudriavtsev yuckyuckyuck

If I want Bash, I'll just use WSL

DJMcMayhem

@Zacharee1 Oh, sorry I forgot. JAVA is run slow! Linux is 4 nerdss!!! lol

Geobits

"It'll never be started" implied to me you didn't use it at all ;)

Dmitry Kudriavtsev

WSL can be used with Xming to run X11 apps under windows.

Geobits

01:42

You have to ask yourself why though :/

Zacharee1

@DJMcMayhem Well I'm very annoyed by Java (or should I say I'm public static int annoyedBy(String Java)).

Dmitry Kudriavtsev

To not reboot to use X apps

Geobits

I don't reboot to use X apps, but then again I'm not on windows.

Dmitry Kudriavtsev

i have a friend that uses xming and wsl to autolaunch xfce at login to windows

then use linux programs

Downgoat

@Zacharee1 you forgot semicolon, brb borking

Geobits

01:43

That makes lots of sense >_>

Dmitry Kudriavtsev

It's their mom's computer and they're not allowed to install Linux or Virtualbox. THe feature could be enabled though.

Zacharee1

@Downgoat append {return "WAT";}

happy?

Geobits

Nooooo, you need a String[], not String.

:P

DJMcMayhem

Did someone say char[]? Puts on brass knuckles — Alex A. ♦ Jul 5 at 17:49

Geobits

Wait, are you returning a String in an int method?

Downgoat

01:45

^

Geobits

@DmitryKudriavtsev That makes some sense I guess, but still.... eww.

Downgoat

ÜBER-BORK INCOMING

PhiNotPi

ducks and covers

ΛεγίωνΜάμμαλϠΟΗʹ

goats and covers

Dmitry Kudriavtsev

I think if you did that in C it would return the first four characters of the string in int form.

Zacharee1

01:51

@Geobits it's to accentuate how little sense Java makes

Java is like they took C and said "how complicated can we make this"

Dennis

@ASCII-only Done. Sorry for the delay.

Downgoat

@Dennis btw, can you also update cheddar (npm install -g cheddar-lang)?

Geobits

@Zacharee1 Most languages are pretty confusing if you write them wrong.

Downgoat

^

TimmyD

@mınxomaτ I ran the test on my home lappy -- i7-6700k and NVidia GTX 1080 -- and got 584 / 8934 ... I think the test may not be long enough to allow the graphics card to ramp up?

Downgoat

01:55

Java is actually very simple compared to many other languages in terms of syntax imo

cheddar> "test".test(/es/)
true
cheddar> "tst".test(/es/)
false

:D :D :D :D

Zacharee1

@Downgoat Well you write in languages that are just random unicode characters put together in some sort of "syntax" so OK :p

Downgoat

@Zacharee1 there is not single unicode char (not in ASCII) in here

Zacharee1

Are Latin chars not part of unicode?

Downgoat

(excluding ツ in ¯\_(ツ)_/¯)

Zacharee1

well I meant all unicode chars

Downgoat

01:58

@Zacharee1 usually unicode character refers to characters not existent in the ASCII charset but ok fixed

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