The Nineteenth Byte

New Main Posts

18:01

0

A group of characters (String input) approaches you and pleads you to sort them into four teams (String[] team), as they are unable to do so in a proper order themselves. Constraints: They want it to be done in the order they came in (i.e., input.charAt(0) will always go into team[0], and inp...

Pavel

@ThomasWard permission denied: go get me coffee

Thomas Ward

@Pavel sudo go get me coffee

eaglgenes101

u=2;s(x)=x+u;a(x,y,z)=foldl(x,fill(y,z));b(x)=y->x(y,y);print(typeof( a(∘,b(∘),4)(s)(4) ))

So far; I'm still getting the hang of the functions I defined

Thomas Ward

in Charcoal HQ, 12 secs ago, by SmokeDetector

@ThomasWard brews coffee for @ThomasWard

now, see, SMOKEDETECTOR knows how to treat me :P

HE gets me coffee.

DJMcMayhem

@ThomasWard I was going to give you my coffee from smokey, but I couldn't remember the command lol

I thought it was !!/brew

Thomas Ward

18:03

@DJMcMayhem well Smokey at least knows how to brew coffee :P

Mr. Xcoder

@ThomasWard Yeah you technically can but that wouldn't be too fun. Having an interesting, although longer approach is not a problem!

J. Sallé

@ThomasWard isn't SmokeDetector a bot?

Pavel

@ThomasWard Thomas Ward is not in the sudoers file. This incedent will be reported.

Thomas Ward

@DJMcMayhem if you're unlucky enough to land on TCOM's Smokey instance, it has !!/doom which just spews evil for five seconds before dying.

eaglgenes101

Okay, so I have a supercompositor function that applies composition repeatedly

DJMcMayhem

18:03

@Pavel cough xkcd *cough

eaglgenes101

Now how do I obtain a super-supercompositor function that iterates the supercompositor?

Pavel

@DJMcMayhem That is the reference, yes.

And also where I got the text from.

Thomas Ward

lol

@Pavel bet you wouldn't do that for Shog lol

Pavel

My implementation of Bash (on windows) has neither permissions to be denied nor sudo.

<-- has never had an interaction with Shog in his life

Thomas Ward

that's actually a good thing

when you have Shog randomly show up and bother you

chances are you did an evil

@J.Sallé maybe...

@Mr.Xcoder Yeah that's why I didn't steal. I did however give you the keys to solving the thing for Python3 :P

point not withstanding, an interesting approach is interesting. :)

i totally didn't check the static bytecounts, i would have found yours to be the shorter solution :P

I like adding a little complexity for uniqueness :)

J. Sallé

18:07

@ThomasWard ಠ_ಠ I want a coffee brewing bot

Thomas Ward

Too bad.

(I also have that at 1028-point font by the way, the resolution of that image is insane but I have it)

someone should create a programming language with the name ಠ_ಠ

even if it's a joke xD

J. Sallé

@ThomasWard lol sounds good.

@ThomasWard there is one already

dzaima

@ThomasWard already done.

Thomas Ward

must see

i must have missed it

J. Sallé

@ThomasWard github.com/molarmanful/-_-

Thomas Ward

18:10

i lol'd xD

J. Sallé

@Scrooble nice profile pic. Sneak&Show/Grishoalbrand player?

Thomas Ward

@Mr.Xcoder I'm surprised I didn't get yelled at for more screwups. I did try to golf it initially though. Guess I missed a few bits :)

Scrooble

@J.Sallé No, just fast ramp into Genesis Wave

Adám

Announcement: APL learning session in 13 mins.

DJMcMayhem

@ThomasWard New proposed avatar:

4

Thomas Ward

18:19

LOL I am tempted now xD

DJMcMayhem

Sorry it's scaled weird XD

Thomas Ward

nah its fine. I can fix it with hax.

but later.

Riker

@ThomasWard no thx i'm good

waht the heck I did not need that image in my screen

@DJMcMayhem chrome was zoomed in far cause I was reading tiny text, so all my screen has is that image

DJMcMayhem

@Riker I'm sorry, would you prefer having this image on your screen?

Riker

no thx I'm good

Adám

18:22

@ThomasWard Can you give TIOBot write access in here?

Thomas Ward

I could but that would be abuse of privs without the room owners giving permission

cc @DJMcMayhem

dzaima

lol Riker, DJ and Thomas all had Adáms icon for a moment for me

DJMcMayhem

@ThomasWard I think he's asking for write access in a different room

Thomas Ward

ah i'm blind

DJMcMayhem

Of which he is an owner

@ThomasWard You have my permission to do that thing in that other room. :P

Thomas Ward

18:32

:P

Mr. Xcoder

@ThomasWard yelled at? Sorry I was trying to give help, not yell :P

NieDzejkob

18:46

@Adám what does TIOBot do? Maybe you should fill the "About me" section of that bot?

Adám

@NieDzejkob It isn't my account.

Thomas Ward

18:57

@Mr.Xcoder figure of speech. My TTS reader on the one computer is evil

I see TIOBot in here... but it needs to be in the other channel lol

Socratic Phoenix

@NieDzejkob it does some stuff

@ThomasWard It was here cuz I logged in on the wrong account; It was in the other room for a bit but I have to leave in 20 mins and my server is off :(

Thomas Ward

what's it need to run

maybe I can spin it up on one of my systems

Socratic Phoenix

just java & account credentials

Thomas Ward

both easy, I can loan it out via AquariusOne, my friendly bot-self xD

Socratic Phoenix

@ThomasWard cool. I'll publish the most recent release on github and link it in a second

Thomas Ward

19:00

i assume it interacts with TIO.run so I don't have to have the entire TIO infrastructure up :p

Socratic Phoenix

@ThomasWard correct; it could work on any TIO backend if I added the option, but right now it's just tio.run

Thomas Ward

cool.

New Main Posts

-2

Q: Display the binary form of the input value!

Constraint :- function need to be called to display the binary form of the input value :- number of variables allowed are 2(including input variable) :- use of bitwise operators are mandatory :- should be optimistic solution

code-golf number c

Thomas Ward

@SocraticPhoenix any particular Java version or does bog-standard OpenJDK 7+ work?

so I know which system to drop it onto :)

Socratic Phoenix

@ThomasWard I think it may need to be Java 8, since I'm pretty sure there's a lambda somehwere

Thomas Ward

19:04

that's fine, OpenJDK 8 is usually what I put on :p

in APL, 17 secs ago, by Socratic Phoenix

I am somewhat confused

@SocraticPhoenix when room owners or moderators move messages from one room to another it sends you an invite to the room that the messages ended up in. Unless it's behind lock and key.

Socratic Phoenix

@ThomasWard Oh, cool

@ThomasWard Current bot. There are probably still bugs...

Thomas Ward

probably are. But i'll spin it shortly, gotta dig out my SSH key lolo

Socratic Phoenix

@ThomasWard One big one is that it doesn't seem to properly connect to multiple rooms, but that could have just been latency.

Thomas Ward

well this is going on a very powerful uplink so we'll see.

symmetric 1Gbps :P

Socratic Phoenix

@ThomasWard Why can't i have interwebs like that -_-

Thomas Ward

19:14

well i have servers :p

servers are in datacenters

datacenters have powerful inets.

Socratic Phoenix

I have a server.... one server... in my dad's apartment in virginia... with terrible wifi xD

it's off...

Thomas Ward

yeah i pay for colocations :P

Socratic Phoenix

@ThomasWard and I don't know what that means :P

Thomas Ward

my equipment, their datacenter, i pay for the uplink

@SocraticPhoenix looks like it's up, and it'll stay online until I kill it :)

yay for always-on servers and linux containerization :)

Socratic Phoenix

Cool

Thomas Ward

19:29

it looks like it replies a lot faster too, though that may just be an illusion. Probably helps it's on a fast uplink though :)

Socratic Phoenix

Hopefully I can get the tiobot account working... I may just ask or answer questions as it to legitimately gain rep -_-

Thomas Ward

@SocraticPhoenix well AquariusOne has reputation. I posted an answer via it to Ask Ubuntu, its home account, instead of my writing the answer. That got it enough rep (two upvotes at least) to start using chat. Since then, no problems.

but yeah, that's really all I've used it for. Or I've given it explicit access in rooms where I am god, but that's its own story :)

or to login and see what something looksl ike to an unpriv'd user :0

@SocraticPhoenix the GOOD news is that this is on a very powerful box too, I tend to run all services inside LXD containers on an Ubuntu box with 2 dedicated CPUs and 8GB RAM. And so far I'm not anywhere NEAR max usage either

Socratic Phoenix

Like I said, bugs.. is there a stack traces?

Thomas Ward

not unless you stop using slf4j. It didn't stacktrace error either

Socratic Phoenix

But I don't use slf4j; the chat API does... xD

Thomas Ward

19:36

:p

well it didn't stacktrace error

Socratic Phoenix

Then I blame the API and claim it as not my problem

Thomas Ward

yeah i found the socket error via sniffing

i have another process on the box that sniffs for chatexchange sockets and yells if it explodes.

this is because of Smokey :P

Thomas Ward

19:54

I assume, of course, that we wouldn't want the TIOBot in here :P

cc @DJMcMayhem because I know you were here earlier :p

Erik the Outgolfer

@ThomasWard nah it would be very disruptive

Thomas Ward

indeed.

Anonymous

@ThomasWard Nope. We have a strict no-bots policy in here. Only the Feeds bots are allowed. Sometimes we make exceptions, but only for very specific circumstances (like the moderator election - we had a bot in here that computed the winners from the vote data when it was released).

Thomas Ward

oh I can understand that one perfectly :)

we're very much the same over in AUGR, though we permit SmokeDetector because it helps us squish spam so easily heh

Erik the Outgolfer

and as I said above this one won't be an exception to that rule

Thomas Ward

19:56

i think i missed that in the lag

points at Campus Internet being crap

Anonymous

We had a TIO bot in another room called DataBot, back when TIO was first made

Thomas Ward

as I said, was merely curious :)

Anonymous

But it hasn't been updated to work with the new API, and the room has since frozen

Thomas Ward

@Mego yeah TIOBot has its own home, and is in the APL channel for their thing heh.

works pretty decently it seems.

Anonymous

Calling for feedback - I know it needs a few example runs, but other than that - are the rules clear? Did I miss anything that needs specifying?

Pavel

20:12

@Mego How exactly do I say that wish is no longer usable? Could I just have a key of chars representing statement, or is there a particular phrase to output?

Anonymous

@Pavel The output format isn't important, so long as it is unambiguous

Anonymous

Rather than outputting each individual card's name, you could output a different character for each

Pavel

@Mego So I could write, say, a literal character $ and say that represent wish not being usable anymore?

Can I just output a number for wish count/int change and use the context of the card drawn for which it is?

Anonymous

@Pavel Sure

Anonymous

@Pavel Sure

Pavel

20:15

Cool

Anonymous

I dislike challenges where the output strings take up a huge amount of the byte count, so I prefer to allow any unambiguous output scheme

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

How many Latin Squares? code-golf number A Latin Square is a square of size n × n containing numbers 1 to n inclusive. Each number occurs once in each row and column An example of a 3 × 3 Latin Square is: [[1, 2, 3], [3, 1, 2], [2, 3, 1]] Another is: [[3, 1, 2], [2, 3, 1], [1, 2, 3]] ...

Okx

feedback? ^

Downgoat

20:40

> new Chain()
TypeError: Class constructor Chain cannot be invoked without 'new'

:|

Uriel

@NewSandboxedPosts oeis formula is a tre-cursion

Okx

@Uriel Wikipedia definition is better: en.wikipedia.org/wiki/Latin_square

you think it's good though?

Uriel

@Okx sure, the question is good, and it's actually nice to have a non-trivial sequence

Okx

thanks haha

i thought an np-complete sequence would be interesting

upvote it if you like it

Adám

20:57

What does this program do?

Downgoat

IIRC it was a compiler forkbomb

Adám

@Downgoat It just recursively calls itself twice?

Okx

@Adám stackoverflow.com literally

Adám

Isn't it enough to do

o(){
  o();o();
}
main(){o();}

DJMcMayhem

@Downgoat It's not gonna forkbomb until runtime

Downgoat

21:00

oh actually looks like it's just code to cause stack overflow

DJMcMayhem

@Adám Yeah, that would be equivalent

Uriel

@DJMcMayhem unless you have a real crappy compiler

Thomas Ward

forkboom?

:P

Downgoat

@Uriel i.e. cheddar

Adám

In fact, how does it ever reach the second call of o()?

Uriel

21:01

@Adám it doesn't. Probably useless call

Adám

o(){
  o();
}
main(){o();}

should be enough.

Maybe even main(){main();} ?

Uriel

main(){main()} (not really)

Ah ninja'd

Adám

@Uriel Yeah, and in a PL I don't even know what is!

Downgoat

that is good example to test LLIR infinite loop detect hm...

DJMcMayhem

@Adám C?

Uriel

21:03

@Adám that's c, but probably valid in a dozen other langs

Adám

@Uriel "valid"

Poke

74

Q: Shortest program that throws StackOverflow Error

Write a program that throws a StackOverflow Error or the equivalent in the language used. For example, in java, the program should throw java.lang.StackOverflowError. You are not allowed to define a function that calls itself or a new class(except the one containing main in java). It should use ...

code-golf

Uriel

@Adám would work the same*

DJMcMayhem

@Adám Out of curiosity, what non-APL languages do you know? Do you work on the APL implementation in some different language?

Downgoat

if your recursion isn't in a condition, it will always either result in 1 iteration or infinite right

Adám

21:04

@DJMcMayhem I don't contribute to the APL implementation other than with ideas for the C(++) programmers to implement. Although parts of Dyalog APL are written in APL.

feersum

It's not a fork bomb. The program does not make any copies of itself.

DJMcMayhem

@Adám So you work on the APL parts of it?

feersum

It wouldn't even use particularly much memory unless you set a huge stack size.

Adám

CMC: forkbomb

DJMcMayhem

@Downgoat How would you get 1? I think it'll always be infinite unless it's in a conditional

Adám

21:06

@DJMcMayhem I could, but have not, other than reporting bugs in the APL code.

Anonymous

@Adám :(){ :|: & };: (not even remotely original)

Downgoat

@DJMcMayhem func f() { return; f() }

DJMcMayhem

...

Thomas Ward

@Adám <WARNING> THE FOLLOWING CODE IS DANGEROUS! DO NOT EXECUTE, IT WILL CRASH YOUR COMPUTER HARD

Python, 27 bytes (according to TIO):

import os;while 1:os.fork()

Adám

@Mego What language is that?

Anonymous

21:07

@Adám Bash

Downgoat

@Adám main(int a,char**b){system(*b)} I I think should work

Anonymous

@ThomasWard You don't need the parens around 1

Downgoat

@ThomasWard brb executing

DJMcMayhem

@Downgoat That'll stack overflow but not fork bomb.

feersum

@Downgoat This is also not a fork bomb since it grows linearly, not exponentially.

DJMcMayhem

21:08

Fork bomb means each iteration doubles

Anonymous

@Downgoat main(){while(fork());} is shorter

feersum

@DJMcMayhem Wrong, it will not stack overflow.

It will create many procesess though.

@Downgoat I actually made a program that did this by accident once.

Uriel

@Mego wait, c has 'fork' as a built-in?!

feersum

It was supposed to be a program that launched another command, given in the args

And then I forgot to strip off the 0th argument.

Anonymous

@Uriel No, but the library containing fork is automatically linked when compiling with gcc

Thomas Ward

21:09

@Downgoat lol

Downgoat

@feersum please experimentally show :P

@DJMcMayhem It shouldn't stack overflow

feersum

@Downgoat I have, see my last message.

It actually took 5-10 minutes for my computer to become unusable.

I didn't know what was happening for a while; the responsiveness of the OS gradually decreased.

Pavel

@Mego If the player has both a use of The Stars and uses of Wish, which does the player use to save themselves?

feersum

A real fork bomb should bring things to a halt immediately, I believ.

Anonymous

@Pavel You mean The Fates?

Thomas Ward

21:11

@Pavel A fork bomb. :P

DJMcMayhem

@ThomasWard while: doesn't work

Pavel

@Mego Yes, fates.

Sorry.

Thomas Ward

E: Dead internet is dead

1 moment

Anonymous

I just clarified that - they use The Fates

Adám

What is exit code 124?

Pavel

21:12

@DJMcMayhem Also indent is needed.

Anonymous

@Adám Application-specific

Pavel

@Mego I see. Cool.

Thomas Ward

@DJMcMayhem fixed both parts; the while loop and the indent for my code.

DJMcMayhem

You can remove a space for -1: import os;while 1:os.fork()

Thomas Ward

also fixed :P

point is don't run it you'll fubar your system

@DJMcMayhem should probably say this is not the most original solution, this is the typical python example of a fork bomb xD

just... reduced slightly.

Adám

21:23

@Adám APL, 8 bytes: {∇&¨⍵ ⍵}

Okx

nice tio link now i can forkbomb tio

Anonymous

@Okx That obviously won't work

Okx

yeah...

Adám

TIO has dedicated forkbomb detection.

Pavel

21:37

@DJMcMayhem Invalid syntax. Works if you replace the semicolon with a newline.

Pavel

21:56

@Adám 0/10 not killed by TIO so it must not be a fork bomb

Adám

@Pavel I'm not sure what exit code 124 is, but I suspect that it is the APL interpreter stopping the fork-bombing before TIO does so.

@Pavel Also, it spins off APL threads, which TIO doesn't detect.

Okx

special apl threads that don't act like normal threads?

Pavel

@Adám I think it's some sort of TIO bug. There normally can't be anything between the timing info and the exit code.

Adám

@Okx Yes.

@Pavel Huh, you're right, Didn't notice. That is odd.

Uriel

22:15

@Mego what lib is that?

Anonymous

@Uriel glibc

Adám

23:05

How ironic that "T9, which stands for Text on 9 keys, is a (…) technology for mobile phones (…) that contain a 3x4 numeric keypad" (Wikipedia).

ATaco

23:16

You can theoretically do it in 6 buttons, which is 5 data bits and a clock button.

Uriel

@ATaco well, there's the issue of getting mortals to buy and use it

ATaco

Or you could do it in 5 buttons if you just considered releasing the buttons as a clock signal.

(But then the 00000 case wouldn't be achievable)

Pavel

23:36

I never figured out how T9 works.

I once had a touchscreen phone that simulated the 3x4 keypad entry scheme for texting. It was great.

Downgoat

> infinite loop in nodejs, good performance

> good performance

don't you hate it when your infinite loop takes too long to execute forever

New Main Posts

23:52

0

Q: Matrix class c++ dynamic array as arguemnt of function

I want to implement a Matrix class. I coded an array of arrays of pointers. When I set the values of each element of the array to 0 with a for loop, it works fine (apparently). But when I try to declare a function of my class (setvalues) to take the values of a 1D array and store them in the matr...

array-manipulation c++

ATaco

@NewMainPosts Somone please closevote/hammer

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