The Nineteenth Byte

musicman523

19:00

for those who would be interested in answering a KOTH, would you all be okay with Python only?

Mr. Xcoder

Pyth, 7 bytes: q1l.{.+ (I think It's golfable)

Leaky Nun

@Mr.Xcoder hint: .+

Mr. Xcoder

@LeakyNun Consistent truthy/falsy?

With inconsistent values, Pyth, 5 bytes: l.{.+

Leaky Nun

@Mr.Xcoder preferred

Mr. Xcoder

What is the target length

?

HyperNeutrino

19:03

.+.+ gives me the deltas of the deltas

If those are all zero, then it's an arithmetic sequence

Mr. Xcoder

@LeakyNun What is the byte count I should aim?

HyperNeutrino

@Mr.Xcoder Wait what counts as truthy and what counts as falsy here

Leaky Nun

@Mr.Xcoder I don't know, I didn't do it

Mr. Xcoder

@HyperNeutrino Why are you asking me?

totallyhuman

how luck-based is jelly's chaining

PhiNotPi

19:05

@musicman523 I would. (I'm assuming each bot would be a Python class?)

Leaky Nun

@totallyhuman 0

HyperNeutrino

Because it seems to be giving 1 for truthy and not-1 for false, but IDK.

totallyhuman

:P

PhiNotPi

Generally the benefits of using a single language (execution speed) outweigh the disadvantages.

musicman523

Also it's just a lot more effort for me to deal with language-agnostic I/O

HyperNeutrino

19:06

@PhiNotPi You could have each bot be a module with certain functions/globals too, but idk

Mr. Xcoder

@LeakyNun l.{.+, should I golf more?

Leaky Nun

@Mr.Xcoder never mind

HyperNeutrino

l{.+ seems to work too maybe?

Mr. Xcoder

@LeakyNun Never mind?! Something ain't good

HyperNeutrino

truthy,false is 1,not-1

Mr. Xcoder

19:07

Am I in my comfort zone?

musicman523

@LeakyNun Hint?

Mr. Xcoder

Consistent, 6 bytes: q1l{.+

Leaky Nun

@Mr.Xcoder no, I just think that you got the core of the challenge, and that we can move on

Mr. Xcoder

@LeakyNun Good, next

Leaky Nun

@musicman523 what construct cannot contain duplicates?

Mr. Xcoder

19:08

@musicman523 HINT: {...}

Leaky Nun

@Mr.Xcoder product of a list

Mr. Xcoder

@LeakyNun [1,2,3] -> 6, right?

Leaky Nun

@Mr.Xcoder yes

For a second I thought you confused product with sum

musicman523

Aha

HyperNeutrino

Python, 35 bytes: spoiler

musicman523

19:10

lambda l:l==sorted({*l})

HyperNeutrino

oh what

right I can combine the two statements

whoops

Leaky Nun

@musicman523 you can't sort a set

musicman523

and {*l} is the same as set(l)

ah

Mr. Xcoder

@musicman523 No point insorting a set

musicman523

true

Leaky Nun

19:11

you also can't compare a set with a list

musicman523

Then lambda l:l==sorted([*{*l}])

Leaky Nun

@musicman523 a set is already sorted by default

Mr. Xcoder

Just a hint

musicman523

@Mr.Xcoder That just checks for duplicates, not to see if it's ascending

oh okay

@LeakyNun sets are not sorted by default

Mr. Xcoder

Oh, I forgot about my challenge

Leaky Nun

19:13

@musicman523 interesting.

your solution is optimal then.

Mr. Xcoder

@LeakyNun Hint

What was reduce

Leaky Nun

@Mr.Xcoder it's two bytes

Mr. Xcoder

@LeakyNun just a curiosity: What was reduce?

HyperNeutrino

Is pyth.herokuapp.com working for you guys?

Leaky Nun

@Mr.Xcoder F

@HyperNeutrino gg someone borked it

Mr. Xcoder

19:15

@HyperNeutrino it is

Leaky Nun

people, please don't exhaust the online compiler

HyperNeutrino

it doesn't work for me

musicman523

it isn't working for me

Mr. Xcoder

Now it doesn't: Application error

Leaky Nun

it isn't TIO

it doesn't have a 60 second timer

Mr. Xcoder

19:15

I was using it!

HyperNeutrino

I did u* and it seems to have stopped it from working... whoops... I thought that would work :I sorry

Leaky Nun

it will break

Mr. Xcoder

I cannot look through that nice search bar *facepalm*

HyperNeutrino

Pyth, 2 bytes: spoiler

musicman523

You can use repl.it if you want

Mr. Xcoder

19:16

Or tio

Leaky Nun

raw.githubusercontent.com/isaacg1/pyth/master/rev-doc.txt

the documentation is here

Mr. Xcoder

@LeakyNun 3 bytes: *FQ. Of course, Q is implicit, so: *F

Leaky Nun

@HyperNeutrino this exhausts the memory

it expands to u*GGQ)

HyperNeutrino

*facepalm* sorry guys

Leaky Nun

start with Q, multiply by itself repeatedly

Mr. Xcoder

19:18

@LeakyNun Next?

totallyhuman

o0

Leaky Nun

@Mr.Xcoder good

musicman523

@totallyhuman what does that do in Jelly?

HyperNeutrino

@isaacg Unfortunately, I appear to have broken pyth.herokuapp.com by doing u* because I don't do Pyth very well. Sorry for the inconvenience. Could you reboot it?

Leaky Nun

@isaacg or rather, can you monitor the memory usage so that it doesn't break?

@musicman523 or 0

HyperNeutrino

19:19

@musicman523 practically nothing

well yes what leaky nun said :I

totallyhuman

0o

Mr. Xcoder

1 min ago, by Mr. Xcoder

@LeakyNun Next?

HyperNeutrino

(not literally nothing, because it will make any falsy value become 0)

lol I deleted my answer about braids because it doesn't actually work, but it still gave me my silver code-golf tag badge lol

Leaky Nun

@Mr.Xcoder 5 -> [[[[[0]]]]]

Mr. Xcoder

Nested list with 0 in the middle?

Leaky Nun

19:21

yes

Mr. Xcoder

Very creative

I now need that search bar :(

HyperNeutrino

Jelly, 3 bytes: 0W¡

Mr. Xcoder

@LeakyNun Can the output be a string?

HyperNeutrino

Or if it matters, 0W¡ŒṘ

totallyhuman

W¡

wouldn't that work?

HyperNeutrino

19:22

no but then that's 5 -> [[[[[5]]]]]

Mr. Xcoder

If outputting like a String is allowed (I think it isn't, for obvious reasons): tio.run/##K6gsyfj/X1tbK1ApWslASyn2/39TAA. Please ignore this meassage if this is not the point.

@LeakyNun Hint?

Leaky Nun

@Mr.Xcoder please use the intended method

@Mr.Xcoder u

Mr. Xcoder

I hate the fact that I do not have that search bar :((

totallyhuman

@HyperNeutrino oh i misunderstood

Phoenix

Python, 24 bytes: lambda i:'['*i+'0'+']'*i

If output really needs to be an array, throw an eval() around it for plus 6 bytes.

Leaky Nun

19:26

9 mins ago, by Leaky Nun

https://raw.githubusercontent.com/isaacg1/pyth/master/rev-doc.txt

Mr. Xcoder

> u <l:GH> <seq/num> <any> Reduce B from left to right, with function A(_, _) and C as starting value. G, H -> N, T ->. A takes current value, next element of B as inputs. Note that A can ignore either input.

HyperNeutrino

Longer solution: f=lambda t,l=0:f(t-1,[l])if t else l

Business Cat

@Phoenix Or just do it properly in the first place, still 24 bytes: f=lambda n:n and[f(n-1)]

HyperNeutrino

oh nice

Phoenix

Nah, too intelligent

Business Cat

19:27

@musicman523 Yeah it will

Phoenix

Also ^^

HyperNeutrino

:38835357 it does though

musicman523

my b

Phoenix

Oh huh

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

Pristine Pristige A pristine program, as defined by Calvin'sHobbies, is a program that does not have any errors itself but will error if you modify it by removing any contiguous substring of N characters, where 0 < N < program length. Pristige is a language I designed in which all syntacti...

Phoenix

19:28

This upholds my belief that dynamic typing is good for golf and nothing else.

Rapid prototyping, maybe.

musicman523

It's an okay system

It lets you do a lot of neat things

HyperNeutrino

Pyth, 3 bytes: spoiler

Mr. Xcoder

@LeakyNun IDK how to do it with u.

musicman523

Personally I prefer Haskell's type classes system over anything else

Mr. Xcoder

But am working on it.

HyperNeutrino

19:30

> F <pf1> <any> <int> Apply repeatedly. A(A(A(A(... B ... )))), C times.

Leaky Nun

@HyperNeutrino you win

HyperNeutrino

yay

Mr. Xcoder

@HyperNeutrino I hate to use u

HyperNeutrino

then use F

Mr. Xcoder

@LeakyNun Should I still struggle with u?

Leaky Nun

19:30

@Mr.Xcoder yes :P

Mr. Xcoder

Target length @LeakyNun ?

4, 5 bytes?

Leaky Nun

5 bytes

HyperNeutrino

tfw you're used to reading text shorthand so you keep reading the "u" as "you" :P

New Main Posts

0

Q: Can you loop without crashing?

Many of us are familiar with the game Tron. You control a "lightcycle" placed on a grid. The lightcycle always moves forward (though you control the direction) and leaves a permanent trail behind it. If you run into a trail, you crash! The goal here is to determine if a given path is a valid loo...

code-golf

Mr. Xcoder

herokuapp is back!

Business Cat

19:32

What's better for a parity built-in: 1 for even or for odd?

Mr. Xcoder

@BusinessCat 1 for odd, 0 for even

Like n%2

Business Cat

So it's just shorthand %2?

Mr. Xcoder

@BusinessCat yes

@LeakyNun u feels so pointless here that I cannot figure out how to do it.

HyperNeutrino

I'll stick to using TIO so I don't break HerokuApp again :P

Leaky Nun

@Mr.Xcoder what does u do?

Mr. Xcoder

19:35

@LeakyNun Please

Leaky Nun

@Mr.Xcoder should I just give you the answer?

Mr. Xcoder

> Reduce B from left to right, with function A(_, _) and C as starting value. G, H -> N, T ->. A takes current value, next element of B as inputs. Note that A can ignore either input.

@LeakyNun Ok, not yet

@LeakyNun I give up with u.

Leaky Nun

spoiler

Mr. Xcoder

I am struggling to not look at it yet.

I can do it

I want to solve it with u.

But how?

@LeakyNun Mini-hint: Does your spoiler source contain the character ]? From the F solution earlier, I see it is [A]

It also must contain Z or 0, for the middle of the list. Am I right?

Leaky Nun

@Mr.Xcoder yes

Mr. Xcoder

19:42

Possible thing I should mess around with: G is the current value.

LegionMammal978

Mr. Xcoder

And it must create a list from the current value. The initial value is Z, so it ends in Z. I also must add a list in every iteration, it starts with u.

Stewie Griffin

The Wi-Fi password at my in-laws' is 256256ffff. They claim it was chosen randomly so that it should be easy to remember. They have never heard of binary or hexadecimal and don't know what a bit it a byte is. Am I the only one who think this it's a very strange coincidence?

Mr. Xcoder

Of course it must contain Q too. I think I have it.

Leaky Nun

@StewieGriffin hunter2?

Stewie Griffin

19:44

Huh?

Mr. Xcoder

@LeakyNun Confirm it is valid before I look at the spoiler: u]GQZ.

Leaky Nun

@StewieGriffin it means, why are you revealing a password in public?

@Mr.Xcoder it is

LegionMammal978

@StewieGriffin Who actually set up the system?

@LeakyNun password is being used as someone's Wi-Fi password right now :P

Mr. Xcoder

@LeakyNun I now am proud of myself

@LeakyNun Next?

Leaky Nun

@Mr.Xcoder good

@Mr.Xcoder I don't have anything for the moment

Mr. Xcoder

19:46

@LeakyNun Perfect, thanks!

I had a great time solving your challenges @LeakyNun. Thank you

We shall repeat that sometimes

Leaky Nun

Thanks

musicman523

CMC: Import all modules in a directory in python

Stewie Griffin

@LeakyNun I'm not afraid someone here will come and use their Wi-Fi :-)

Poke

@StewieGriffin at least it doesn't spell a real word

Mr. Xcoder

Development of Cthulhu

Room for the development of Cthulhu (github.com/Mr-Xcoder/Cthulhu

Wanna join ^?

Stewie Griffin

19:48

@LegionMammal978 they say they did it together...

LegionMammal978

@StewieGriffin And they aren't very technical, I suppose?

Poke

maybe one person entered ther 256256 and the other person entered ffff

#truerandom

Mr. Xcoder

@totallyhuman Did it work? (first time doing this)

totallyhuman

No

Stewie Griffin

@LegionMammal978 not at all... as I said, they did it together, since it's too hard to do alone. :-)

Mr. Xcoder

19:52

I granted you write and read access...

Can't you write a message right now?

@totallyhuman Ignore my last invite

totallyhuman

Lol

Mr. Xcoder

I can't invite you

@totallyhuman Try now

@musicman523 I granted you write access

Made it free

Development of Cthulhu

Room for the development of Cthulhu (github.com/Mr-Xcoder/Cthulhu

I have to go now.

totallyhuman

Bye

Mr. Xcoder

Can I golf this 4 byte Pyth code: .MP_? It is meant to extract the primes from an array taken as input

Anyone?

link

Ping me if you find a shorter solution ^. Bye!

Wheat Wizard

20:19

This new user was mistakenly told his answer was invalid here by a more experienced user. Here is the relevant meta.

I have voted to undelete, as there is nothing wrong with the answer.

musicman523

@WheatWizard I don't have a high enough rep to undelete. Should it be flagged?

Wheat Wizard

Perhaps, I'm not really sure on what should be flagged.

totallyhuman

i wonder how many posts saying "will golf later" or something like that have been left untouched

LegionMammal978

Fun fact: srand(0) has the exact same result as srand(1) on a glibc implementation

In stdlib/random_r.c:

  /* We must make sure the seed is not 0.  Take arbitrarily 1 in this case.  */
  if (seed == 0)
    seed = 1;

Poke

@WheatWizard huh? output isn't implicit in ruby. he would need to prefix the answer with puts or something

and that wouldn't work if it was doubled

Wheat Wizard

20:29

@Poke No He's using interactive mode, in which output is implicit

Leaky Nun

@Mr.Xcoder I don't see any point commenting a 79 bytes after I have commented a 76 bytes

Poke

@WheatWizard that's what a snippet is..

Wheat Wizard

@Poke No its not

Poke

oh ok then

good talk

Wheat Wizard

Interactive mode is valid for answers

Leaky Nun

20:30

@Mr.Xcoder that's actually golfier than I would have it

Poke

@WheatWizard that has a net of +1

i don't think that's widely accepted

Wheat Wizard

huh? It has a net of +14?

Poke

oh you linked the other answer

Wheat Wizard

Ah I see my bad

Poke

well i guess the language in the answer should be "Ruby REPL"?

Wheat Wizard

20:33

Yeah he should change the title of his answer

I think the official name is irb

Poke

ye

Mr. Xcoder

@LeakyNun I am on mobile, haven't seen you comment. Sorry

@LeakyNun I'm happy then

Poke

using a REPL as your language seems as "meh" to me as using a lambda

in this case it was done creatively

but in most cases it's a no-thought method to reduce bytecount

Wheat Wizard

I'm not sure how I feel about it myself. It doesn't sit well with me but there is no reasonable way to disallow it.

Mr. Xcoder

@WheatWizard REPL languages?

Wheat Wizard

20:40

Yes

Mr. Xcoder

That kind of ruined by challenge

Indeed

Wheat Wizard

I think they ruined your challenge in the same way that golflangs "ruin" challenges. There is a tool for every job and its no fun to do a job with the correct tool.

Poke

fair enough

@LeakyNun I spy a League of Legends character quote

Leaky Nun

@Poke that isn't where I got it from though

Poke

I believe it

his laugh happens to be my text message ringtone

Mr. Xcoder

20:46

@LeakyNun Cheer curiosity: How would you have had it?

Leaky Nun

@Mr.Xcoder fP_TQ, the obvious way

Mr. Xcoder

@LeakyNun I see.

@LeakyNun Noob question: why cannot Q be ommited in this case?

Leaky Nun

@Mr.Xcoder read the docs of f

Mr. Xcoder

> First input where A(_) is truthy?

And that would be, of course, 2?

Leaky Nun

yes

Mr. Xcoder

20:53

BTW, nice one +1

Step Hen

Time flies like an arrow; fruit flies like a banana

"Time flies like an arrow; fruit flies like a banana" is a humorous saying that is used in linguistics as an example of a garden path sentence or syntactic ambiguity, and in word play as an example of punning, double entendre, and antanaclasis. == Analysis of the basic ambiguities == "Time flies like an arrow" is an English phrase often used to illustrate syntactic ambiguity. In this connection the sentence is often seen as part of the elaboration: "Time flies like an arrow; fruit flies like a banana". Modern English speakers unambiguously understand the sentence to mean "As a generalisation, time...

totallyhuman

0

A: Computers will never taste a refreshing cookie

Bubblegum, 23353 bytes Yup. Most of it won't fit in an answer so... Both the code and the TIO link are in pastes. Code (a hexdump of the code) TIO link (the output exceeds TIO's limitations)

my eenie little chromebook almost crashed trying to do this o0

Riker

why does JS not have a simple sub in string

why string.includes(sub)?

Downgoat

@Riker because in means if it has a property

e.g. 'includes' in string === true

Riker

oh

that's actually really cool

ATaco

21:05

JS much prefers to use functions rather than syntax.

Riker

@Downgoat I wish that could be "has" or similar

i.e. string has 'includes'

Downgoat

@ATaco proof: latest ESDiscuss thread. one of the guys there had a big rant about it :P

Riker

@ATaco I've noticed that

Downgoat

@Riker :O cheddar has this. 100% definitive evidence you should use cheddar

cheddar> 'foobar' has 'foo'
true

wait oh :|

Riker

haha

@Downgoat "cheddar would have this, but, uh, cheddar is a horribly broken PoS that is currently on hold"

Downgoat

21:08

@Riker :'(

I can switch from has -> in if you will use cheddar :D

totallyhuman

i keep asking this but i feel like my library is lacking in functionality

what would you expect an oeis library to have

Downgoat

@totallyhuman 1) get OEIS descriptions, a list of sequence example, authors 2) parsed descriptions of related/linked OEIS sequences, sequence ID

Riker

@Downgoat lol

no it's cool I like has better

totallyhuman

descriptions - check
first few terms - check
author - check

sequence ID - check

Downgoat

by parsed descriptions i mean the linked sequences from 'comment' field has extracted

obviously parsed links/refs would be a plus

totallyhuman

21:13

ah

DJMcMayhem

stilldrinking.org/programming-sucks

Downgoat

oh and obvious one: ability to generate OEIS link. (I know it's trivial you can just do "oeis.org/A#{seqId}" but still...)

totallyhuman

yes done

Downgoat

Might be a reach but would be really awesome: sometimes haskell/mathematica snippets are on OEIS, ability to spawn a haskell/mathematica process if detected on user's computer and get value from function would be amazing

totallyhuman

Mm I really wanted to do something like that

I'm not sure how I'd go about making it work perfectly

Especially since I'm literally taking code from the internet and running it

Downgoat

21:18

to be fair it's python so no matter what you do code is insecure

Riker

@Downgoat ok, I'm really stuck w/ digital ocean + github domains, can you give a step-by-step walkthrough of what I need to do >_> it shouldn't be this hard

Step Hen

My cQuents interpreter is written in Python, once I get it ~~working~~ finished it should be able to generate most OEIS sequences

Riker

I've got a file called "CNAME" containing "username.github.io" on the server, and the github repo is set to go to "domain.com"

and the google domains area has the nameservers (ns1|ns2|ns3).digitalocean.com

Downgoat

@Riker Quick question: why are you use a DO VPS if you are hosting a GitHub pages site?

totallyhuman

Yes but oeis doesn't host cquents solutions for each sequence :P

Riker

21:20

@Downgoat trying to get a custom domain name

Downgoat

your domain name provider should give you DNS options themselves

Riker

o really?

hm

Step Hen

@totallyhuman Is your library going to be online or offline?

totallyhuman

Online

Downgoat

if u do it simplifies things quite a bit

Riker

21:21

thanks :D

Step Hen

oh, I thought it was supposed to be offline, since I thought you'd be using it for PPCG, nvm

totallyhuman

I do not want to deal with scraping the whole oeis

It's yuuuuuge

Downgoat

@totallyhuman you could have your thing spawn a docker on launch with like 0 perm and execute securely inside that container

totallyhuman

github.com/totallyhuman/py-oeis/blob/master/oeis.py

isaacg

@LeakyNun It seems fine to me currently - do you know how long it was down for?

New Sandboxed Posts

21:30

0

A: Sandbox for Proposed Challenges

Self-Improvement Your Task You must create a self-mutable program that, when run, outputs a non-zero integer and also overwrite the file with a program that outputs double the number. For example, if I run the program self-improvement and it outputs 10, it must output 20 when I run it the seco...

totallyhuman

Also I literally have no idea how to use docker

Also didn't it get renamed?

Downgoat

@totallyhuman still docker on its website and everywhere. they might have gotten acquired and all though.

totallyhuman

Oh huh

Downgoat

21:48

Question: what do you call the thing (context: app design pattern) that talks between model and controller/view

New Main Posts

2

Q: Tips for golfing in x86/x64 machine code

I noticed that there's no such question, so here it is: Do you have general tips for golfing in machine code? If the tip only applies to a certain environment or calling convention, please specify that in your answer. Please only one tip per answer (see here).

code-golf assembly

totallyhuman

@NewMainPosts this one is one of those cases: "Don't."

Challenger5

What's the shortest way to get the element of an array in Jelly?

totallyhuman

ị

DJMcMayhem

@Challenger5 ị

totallyhuman

21:57

Ninja'd

Challenger5

Sorry, I meant last element.

DJMcMayhem

ṫ

totallyhuman

ṫ

DJMcMayhem

Nope

Ṫ

Challenger5

But Ṫ modifies the original list, and I'm using the original list

How would ṫ work as a monad?

DJMcMayhem

21:59

ṫL

Development of Cthulhu

Development of Cthulhu

Transcript for