The Nineteenth Byte

Fmbalbuena

00:00

@lyxal Can you subscribe my channel? I already subscribed your channel.

@cairdcoinheringaahing wait why i don't appear?

caird coinheringaahing

Am I going crazy, or is this listing Fmbalbuena's most recent meta answer being posted at Sep 4 '14 at 21:27?

Fmbalbuena

@cairdcoinheringaahing wait bug?

ta Radvylf srik su shilani

loool

emanresu A

What's more none of them are times their account has existed

caird coinheringaahing

@cairdcoinheringaahing Oh right, that's the time the Sandbox was posted

Bubbler

00:05

Yeah

ta Radvylf srik su shilani

Oh

:|

emanresu A

True, but one says Aug 12 at 19:16

Fmbalbuena

0

Q: My recent answer time was 2014

this recent answer This answer is too old, now is 2021, This is a bug.

Bubbler

Showing it there is very confusing though

emanresu A

And it doesn't have a year

caird coinheringaahing

00:06

That's totally not intuitive

emanresu A

Should be dated '21

caird coinheringaahing

@emanresuA The top date is the time the question was posted, the bottom is the time the answer was posted

emanresu A

I realise that. SE usually dates years

ta Radvylf srik su shilani

Any feedback on Inject arbitrary code into a compiler?

caird coinheringaahing

@Fmbalbuena you do, but because SEDE only updates every Sunday, it only lists you with 9 answers

emanresu A

00:09

By "behave non-deterministically" do you mean it can't have random builtins?

ta Radvylf srik su shilani

Yeah. It also can't rely on things like environment variables to change behavior.

(Unless you counted that as how it takes I/O, I guess)

caird coinheringaahing

@cairdcoinheringaahing Honestly, the entire layout if the new &tab=answers page is kinda unintuitive :/

Bgil Midol

@cairdcoinheringaahing No, I need to represent something like reversed (123) = ...

caird coinheringaahing

The votes count is too small, answer time/date should be listed before the question time/date, and all the metadata is too small

emanresu A

submits Vyxal — emanresu A 20 hours ago

Fmbalbuena

00:17

@emanresuA Can i Steal Vyxal codepage?

ta Radvylf srik su shilani

Vyxal is MIT licensed, so yes

user

Of course

Fmbalbuena

@taRadvylfsriksushilani Can you generate a random codepage for some reason?

user

My school district's allowing virtual instruction even for students not in quarantine! \o/

lyxal

@taRadvylfsriksushilani I think you'll find that all the cop answers will be cracked by @AaroneousMiller :p

ta Radvylf srik su shilani

00:20

lol :p

lyxal

If you asked Aaron how many ACEs he's found with Vyxal, the answer would easily be "yes"

Sandbox Posts

00:53

0

A: Sandbox for Proposed Challenges

Biggest katlani noun dictionary in 400 bytes code-golf kolomogorov-complexity Katlani is a constructed language being designed in chat. In this challenge, your goal is to print the largest dictionary of katlani nouns possible in 400 bytes or less. Task In 400 bytes or less, your program should p...

Wheat Wizard

Can anyone figure out why this convey program outputs zero indefinitely?:

https://λ.land/convey/run.html#eyJjIjoieyxcIiw8MF9cbiBePit9XG5fMCIsInYiOjEsImkiOiJbMSwyLDFdIn0=

{,",<0_
 ^>+}
_0

Fmbalbuena

@WheatWizard Can you teach me convey?

Wheat Wizard

Aparently not.

Fmbalbuena

Help me i can't explain you.

OldSandboxPosts

Sandbox posts last active a week ago: Reversed Multiple Pair, Short programs for fixed outputs, Is this hexagon symmetric?

Wheat Wizard

01:01

@Fmbalbuena I can teach you convey at some point. I'm not great at it anyway.

Unrelated String

i've completely forgotten how convey is supposed to work but the step by step visualization really does not look right for that

Wheat Wizard

But not tonicht it's w am.

Ok I figured it out I confused _ with .. There are actually invisible _s flowing through the program which apparently add to zero.

*nearly invisible.

Unrelated String

wacky

Fmbalbuena

@WheatWizard because this don't terminate

Wheat Wizard

Yeah that was my issue.

Ok posted my convey answer. Goodnight tnb.

Fmbalbuena

01:05

@WheatWizard I did not see the answer

Wheat Wizard

0

A: Ken Iverson’s Favourite APL Expression?

convey, 13 bytes {>+} ,",.0 .0 Try it online!

Bubbler

Hmm, I have a challenge to nominate for Best Of 2021 but it fits in way too many categories...

Fmbalbuena

ok

Wheat Wizard

@Bubbler What challenge is it? I'm curious.

Fmbalbuena

@WheatWizard Congrats you earned Curious badge.

Wheat Wizard

01:20

Indeed I did. Quite a long time ago now.

Fmbalbuena

@WheatWizard How many curious badges do you have?

Wheat Wizard

You can only have 1 max.

Fmbalbuena

oh sorry, How many badges that the max is 1?

Bubbler

@WheatWizard This

I decided to nominate it here btw.

caird coinheringaahing

@Fmbalbuena I believe 57

Wheat Wizard

01:33

@Bubbler I know. I get an inbox notif every time anyone nominates anything ;)

Fmbalbuena

CMC: print every badge that the max is 1.

caird coinheringaahing

01:45

@emanresuA Posts in the profile page only report a year if they were a year (as in 365 days) ago, not if they were in the last calendar year

ta Radvylf srik su shilani

02:00

Oops, that incredible tanh discovery on the float division challenge was made by Delfad0r, not Arnauld. I'd been giving credit to the wrong user for the last like 8 months lol

ta Radvylf srik su shilani

02:10

Best of CGCC 2021 is now accepting nominations!

7

@SandboxPosts Any feedback?

ta Radvylf srik su shilani

02:31

@cairdcoinheringaahing Do you have any meta posts related to your tag moderation efforts on meta during 2021? I feel like that's definitely worth a nomination

Fmbalbuena

Can someone help me to make details and clarity?

-1

Q: Move to Right and left

Task Your task is Take a inpus as a list of non-negative numbers, Move Right and left. If the numbers combine, then sum. If there is 1 element, the middle number is 0. Example A simple example is [1] gives [1, 0, 1] because [1] / \ / \ [1, 0, 1] Another example [1, 2] /\ /\ / X ...

code-golf math number array

caird coinheringaahing

@taRadvylfsriksushilani There's codegolf.meta.stackexchange.com/questions/23456/…, but that was posted by HN

There's also this SEDE query that I used

(speaking of, a couple of those questions could do with status-declined tags)

This is very unlikely to ever happen (see my comment), this has a corresponding MSE post with no status tag, and this is potentially still up for discussion

Fmbalbuena

@cairdcoinheringaahing Reopen review?

caird coinheringaahing

You mean this review? The question still isn't clear. I'm guessing you want to suggest a monthly event, like LOTM, where authors post challenges. But, your meta post isn't at all detailed enough. Why should this be an event? What should the themes be each month? Should the monthly challenges be themed? How exactly would it work? etc.

Fmbalbuena

@cairdcoinheringaahing no, in Main

caird coinheringaahing

02:43

@Fmbalbuena I haven't done a reopen review on main in a week

Fmbalbuena

@cairdcoinheringaahing why you don't like reviewing?

caird coinheringaahing

...

ta Radvylf srik su shilani

@Fmbalbuena it's not that caird dislikes reviewing, there just aren't many reopen reviews

caird coinheringaahing

After WW, who has godlike powers with reviewing, I think I'm the second most active reviewer

Fmbalbuena

@taRadvylfsriksushilani ok

caird coinheringaahing

02:45

And, in my defense, only 2 posts have been up for Reopen reviews since my last RO review :P

Fun fact, there's no user who beats me in all review queues (due to FP being split into FA/FQ), but ignoring that, only WW beats me in all queues

Jan 14 at 13:02, by caird coinheringaahing

@cairdcoinheringaahing Ooh nice, speaking of, I'm only 2 late answers reviews away from Reviewer :D

^ still applies cause there's only been one review (by HN) in the last week ಠ_ಠ

Fmbalbuena

@cairdcoinheringaahing because WW is unWinnable revieW Reopen votes.

caird coinheringaahing

03:02

Huh. Looking at codegolf.stackexchange.com/review/first-posts/stats for the historical record, only 4 users are in the top 10 reviews for each queue: me, WW, DJ and Stephen. However, going by FQ and FA, I'm the only one in the top 10 for all 8 queues

l4m2

03:47

Is there language that number lengt O(log n) and form such that autogram don't exist even if chars not in the language is allowed?

By "language that number lengt O(log n)" I mean: if a language call 1 a, 2 aa, 3 aaa, etc. then it can't say "There's aaaaa a", there're 6>5 a's

user

04:04

@Fmbalbuena caird is literally one of the most prolofic reviewers here (can you use prolific hete?)

PyGamer0

lol

lyxal

Oh sweet sweet internet and phone reception how I've missed you for 3 hours

emanresu A

Welcome home

lyxal

The joys of visiting people who live in reception deadzones

user

The joys of visiting people

emanresu A

04:16

The joys of ~~visiting~~ people ~~who live in reception deadzones~~

user

How to be happy: Be ruse as hell to everyone and you won’t get invited anywhere. Works for me

PyGamer0

@lyxal where did you go?

lyxal

@PyGamer0 just to a friend of my parents

PyGamer0

oh

lyxal

@user believe it or not, it was actually kinda relaxing hearing old stories from this family friend while having a cup of tea

user

04:23

Ah if they’re doing all the talking then it’s all good

PyGamer0

fun fact: i have history exam today

lyxal

@user I very rarely do all the talking - all the family friends I see seem to understand that things work better when they do the talking

user

You’re lucky lol

All my relatives expect me to tell them about my life and stuff

lyxal

Although I suppose it helps that these friends are in their 70s and up lol

user

It’s a good thing I live ina whole nother country now

@lyxal lol yeah old people can really go on and on once they get started

lyxal

04:26

@user exactly.

PyGamer0

> tjjfvi solved all 25 challenges in AOCG2021 using TypeScript Types

lyxal

Covid has made it so that I haven't been able to socialise with people my age - last year was my first year of uni meaning I didn't have my high school friends any more. And lock downs meant I didn't meet people irl

So I'd say I'm in a pretty good social position

user

Pretty good?

Bubbler

04:44

Well, everyone socializes virtually these days, no?

PyGamer0

types of socialising:
- virtually
- physically
- mentally
- historically
- scientifically
- idiotically

Unrelated String

not sure i've really had friends in my year since middle school

Bubbler

My way of socializing: I forget all "friends" when I graduate from somewhere

user

^

Bubbler

Internet friends are forever because there's no graduating from it :P

3

PyGamer0

04:51

lol

user

Everything stays on the internet forever, including friendships :p

PyGamer0

i WaNt FrEnS
          - Billy, How to Make Frens 2022

user

Once you enter the internet, you become immortal

PyGamer0

How to Make Frens:
- Eat
- Become sad that you don't have frens
- ?????
- Profit

user

Halp i did steps 1-3 but no frends

PyGamer0

04:55

@user did you ????? correctly?

user

CMP: How many of you in tnb are losers with few or no friends?

PyGamer0

idk how many i have, irl i have a couple

i am not a loser then

user

@PyGamer0 was it supposed to involve running away while screaming?

Bubbler

@user I have zero irl, and I haven't had any problems from it so far

user

@PyGamer0 only two lmao what a loser (/s that’s pretty good)

PyGamer0

04:58

@user no

user

@Bubbler my parents keep telling me i need to make friends in case something happens and i need to be bailed out. I’ll let them know an infinite stranger said otherwise :p

*internet

Bubbler is finite

2

ta Radvylf srik su shilani

Says who?

Do y'all think Reverse Zip Bomb fits under Breaking the Mold? I think it does, but I don't really want to self-nominate "unilaterally" lol

Bubbler

06:04

Yeah, it's a good one

graffe

I have a long list of ints and I want to check they are pairwise coprime in Python. Is there a clever way to do it?

emanresu A

@taRadvylfsriksushilani Yeah

Bubbler

though you can always make a nomination unilaterally and let people decide at the voting phase :P

PyGamer0

@graffe what is pairwise coprime?

graffe

@PyGamer0 each pair is coprime

emanresu A

06:06

@Bubbler Wait, is your hexagony thing in first place?

PyGamer0

@graffe example of input?

Bubbler

@emanresuA I think so, it ties with Keg and wins against everything else

graffe

@PyGamer0 6, 25, 49, 121

emanresu A

I feel like this could be a nomination for wrong tool for the job

PyGamer0

my classmates dont even know o/

:/

Unrelated String

06:11

what

coprimeness?

PyGamer0

no this emoticon o/

or \o

@graffe you want to check if adjacent values are coprime?

graffe

@PyGamer0 no I would like to check that all pairs are coprime

Bubbler

Pairwise coprime means all (not necessarily adjacent) pairs are coprime, yeah

PyGamer0

oh

Bubbler

I don't think there's an easy shortcut for it, unless you use something like sympy and invoke number theory functions

Unrelated String

06:16

@PyGamer0 sad

Bubbler

Or you can try this: let P be the product of all numbers. Divide P by each number, and take the GCD (not pairwise, just reduce by math.gcd) of all of them. If it is 1, the numbers are pairwise coprime.

(Doesn't work if you have 0 in your list)

PyGamer0

import itertools as it
from math import gcd
x = [6, 25, 49, 121]
print([*map(lambda a:[gcd(*a) == 1, [*a]], it.combinations(x, 2))])

@graffe is ^ what you want

graffe

@PyGamer0 thank you!

PyGamer0

for me it outputs: [[True, [6, 25]], [True, [6, 49]], [True, [6, 121]], [True, [25, 49]], [True, [25, 121]], [True, [49, 121]]]

graffe

I just found cs.stackexchange.com/a/93032/6635

PyGamer0

06:22

@graffe idk if my method is right

graffe

python has math.lcm now so maybe this is the best way?

New Posts

0

Q: How to fix this incrementation for this 'diamond'?

I am trying to get the slashes to form a half-diamond type of shape, but I cannot seem to get the incrementation correct. I currently have: else if (menuOption == 2) { int numberOfDolls = 0; cout << "Number of dolls -> "; cin >> numberOfDolls; for (int i = 1; i <= numb...

c++

emanresu A

Comments userscript go brr

UGH

better asking this kind of questions in code gulf — THUNDER 07 52 mins ago

@wockywoad No it is specially for these kind of questions will get response soon for this kind of questions there : ) — THUNDER 07 27 mins ago

I hate this user

Sorry, that was a bit strong. It just seems like they're deliberately sending spam here.

lyxal

@Bubbler this implies Keg is tied first place which ngl doesn't sound right

Not that it's tied, that it's first place

PyGamer0

06:43

@emanresuA yeah it looks like that

lyxal

@emanresuA which hexagony thing?

emanresu A

2

A: Best of CGCC 2021 - Now Accepting Nominations!

The most unexpected outcome An answer that you didn’t expected it to work, or do something else, but unexpectedly did some weird behavior and made the answer valid. This could involve some interpreter bug, or obscure feature that wasn’t documented nor known by many people. Lololololololololololol...

hyper-neutrino

technically they were right that they do get quick responses on this site with this type of question

PyGamer0

lol it would get immediately closed, very helpful indeed

oh they already asked lol

@emanresuA why is it code gulf?

gulf stream <=> golf stream?

emanresu A

Spellingn't

PyGamer0

06:50

> golf stream is a warm ocean current originating from golf of Mexico

PyGamer0

07:23

ok i have sucessfully lured my classmate into this room

@user1134108

emanresu A

You realise they can't talk here right?

PyGamer0

i know

lol

idk why am i finding this funny

emanresu A

It's funny when your little brother invades

3

PyGamer0

lol

lyxal

@user1134108 what pygamer hasn't told you is that staying here leads to a crippling addiction to code golf

If this isn't something you wish to accept, leave now

PyGamer0

07:28

he doesnt program thats why its funny

lyxal

he does now.

3

PyGamer0

lyxal

@PyGamer0 how is Pygamer Jr going?

PyGamer0

he is doing class

@emanresuA how long are you gonna wear that hat?

emanresu A

Idk

PyGamer0

07:42

CMP: Juic or no juic?

lyxal

No juic yet

I try for thirtee minut

And no juic

I cry

PyGamer0

did you use Neil's advic

lyxal

Was sleep when advic

Don't know advic

PyGamer0

Jan 16 at 22:02, by Neil

@user your problem is that you need 6e23 avocados to get juice. this is known as the avocado constant

^ here is advic

CMP: tacit or stack based golflangs?

lyxal

Stack based because I don't get a headache after 20 minutes

emanresu A

07:47

^

PyGamer0

@lyxal and @Vyxalers did yall tried creating a language with Vyxal (stackbased)

Razetime

prefix

lyxal

@PyGamer0 I implemented an esolang in Vyxal once

PyGamer0

@Razetime any reason for prefix?

emanresu A

I have BF to Vyxal transpiler

Razetime

07:49

because i like it that's the reason

emanresu A

o/

PyGamer0

08:04

z/

emanresu A

Nvm back

PyGamer0

\z

pxeger

08:24

Somewhat amusing that codegolf.stackexchange.com/questions/241474/… with a net score of 0 is on HNQ

emanresu A

Slightly concerning

Especially since it’s a probable dupe

Ok looks like the xkcd thing is a plane

pxeger

coccyx??

autocorrect wilding

emanresu A

Mobile chat is cursed

@pxeger yep

emanresu A

08:46

CMQ: which is better at data compression, golflangs or zips?

(Judged on pure compression, for practical purposes zip wins hands down)

pxeger

For anything longer than a few orders of magnitude of bytes, zip will win

emanresu A

/shrug it loses on any of the generated Vyxal programs from print x without x

Wait I’m on mobile

PyGamer0

std::map<char, std::pair<int, Type(*)(Type)>> atoms;

^ is that correct? (trying to convert python to c++)

pxeger

correct for what?

PyGamer0

09:02

python: atoms = {"a": [0, lambda: 10]}

pxeger

you can't just say "is this correct" with no indication as to what you're aiming for

PyGamer0

@pxeger basically i am asking if the type definition is correct

i want to recreate ^^ that in c++

so i am mapping char to a pair of int and a function,

Type is a union of int and vector of Type

namespace plg {                                                       typedef union Type {
        int ix;
        std::vector<union Type> vx;
    } Type;
    std::map<char, std::pair<int, Type(*)(Type)>> atoms;
};

emanresu A

If you want overloading for flax don’t use c++

PyGamer0

i am making a prefix language in c++

nothing flax related

pxeger

@PyGamer0 you're gonna need a tag on that union

PyGamer0

09:06

tag?

pxeger

otherwise there'll be no way of knowing whether the item you're looking at is an int or a vector

Tagged union

In computer science, a tagged union, also called a variant, variant record, choice type, discriminated union, disjoint union, sum type or coproduct, is a data structure used to hold a value that could take on several different, but fixed, types. Only one of the types can be in use at any one time, and a tag field explicitly indicates which one is in use. It can be thought of as a type that has several "cases", each of which should be handled correctly when that type is manipulated. This is critical in defining recursive datatypes, in which some component of a value may have the same type as the...

@PyGamer0 also vector<union Type> should just be vector<Type>

PyGamer0

ok

this is very hard :/

Sandbox Posts

0

A: Sandbox for Proposed Challenges

Navigate the city The government of your country has just completed a city designed to accommodate a few thousand people. It has all sorts of facilities including roads, restaurants, malls, houses, etc. You have been invited to test the road system, but you are completely unfamiliar with it, so y...

Bubbler

09:22

PyObject internals in a nutshell

pxeger

The CPython object layout is actually remarkably simple I think

user

10:04

Ha

I nearly went crazy trying to mess with them

pxeger

github.com/cgccuser/whython?

oh you deleted it lol

user

10:33

Lmao yeah

I was trying to implement the monkey patching on steroids thing

ThisFieldIsRequired

11:16

what nice awkward silence

pxeger

WOULD YOU PREFER WE BE LOUD?

ThisFieldIsRequired

that would be slightly better

PyGamer0

OH OK

ThisFieldIsRequired

YES INDEED.

YOU JUST INSPIRED A MINI-CHALLENGE: CAPITALIZE ALL LETTERS IF THERE IS "LOUD" IN THE INPUT, LOWERCASE ALL LETTERS IF THERE IS "SOFT" IN THE INPUT, AND KEEP THE SAME OTHERWISE.

PyGamer0

CMM: If the challenge is asking me to input as a list, can I make a function that takes the length of the list as the second argument?

lyxal

11:25

@ThisFieldIsRequired Vyxal, 15 bytes: ⇩:‛εḭc[⇧|‛ʁøcß⇩

pxeger

@PyGamer0 I think that's only normally allowed in languages where arrays don't have their length as an inherent property (e.g. C)

PyGamer0

oh, so i cant do that in python

ThisFieldIsRequired

@lyxal excellent answer

lyxal

well it's true

Jet fuel can't melt loud beams

ThisFieldIsRequired

Well it can't melt LOUD ones. Nobody said it couldn't melt loud ones.

PyGamer0

11:38

CMQ: How do I do while loops in a lambda?

lyxal

you don't

use recursion instead

PyGamer0

ok

New Posts

0

Q: Crack the Caesar cipher

The Caesar cipher is a simple and famous cipher, where the letters of the alphabet are rotated by some secret amount. For example, if our secret rotation is 3, we would replace a with d, b with e, w with z, x with a and so on. Here is an example (rotation amount: 10): Robo sc kx ohkwzvo This cip...

code-golf string cipher

ThisFieldIsRequired

11:55

@PyGamer0 You can't.

I mean you could do something like any though.

Loop through an infinite list and do stuff like updating variables or printing while looping, and once you hit the condition, stop. Like this?

that would require generators though

and some source of infinite list

user

12:19

@PyGamer0 exec

Anush

12:40

I am confused by lambda functions in Python. In this line make_vec_env(lambda: BitFlipEnv(array_length=50), n_envs=12) what exactly is being passed to the make_vec_env function?

pxeger

two objects: a function, and an integer 12

Anush

thanks. I wonder why the lambda is needed at all

pxeger

because it produces a new BitFlipEnv (whatever that is) each time you call it

rather than using the same one

Anush

thanks! That makes perfect sense

stable-baselines.readthedocs.io/en/master/common/cmd_utils.html hmmm

env_id – (str or Type[gym.Env]) the environment ID or the environment class

I don't understand how this lambda function is passing a class

pxeger

Type[gym.Env] means a subclass of gym.Env

but the main thing you do with classes is call them to instantiate them

so you can often use functions which return objects in their place

Anush

12:50

ah ok thanks

PyGamer0

13:22

i guess the lambda in python got its name from lambda calculus

pxeger

I think the use of lambda to mean function might have existed before then

actually, looks like Alonzo Church's use was the first

Apparently he picked lambda via "eeny, meeny, miny, moe"

thejonymyster

13:38

@pxeger a rigorous and time tested selection process

New Posts

0

Q: Replicate "dotnet ef" unicorn

.Net Technology is an incredible framework with marvellous functionalities, and among all of them, the most important one obviously stands out: Yep, your simple task is create a program that when it takes at input: dotnet ef It prints the following ascii art by output: /\__ ...

code-golf ascii-art

ThisFieldIsRequired

14:09

@SandboxPosts Is there any feedback on this challenge that anyone would like to give? It's a hugely complex challenge, so I will likely need to clarify a lot.

Razetime

i don't think you replied to the message

ThisFieldIsRequired

I didn't?

Well here's the link then: codegolf.meta.stackexchange.com/questions/2140/…

and I know I only posted the proposal 4 hours ago, but then again I will probably need to make a lot of changes. Even today I have had to clarify a few confusing parts I found myself.

pxeger

I don't think the new tag navigation is warranted. Would path-finding and grid do?

ThisFieldIsRequired

yeah, maybe

ta Radvylf srik su shilani

14:38

@PyGamer0 Something new :p

PyGamer0

@taRadvylfsriksushilani ok: Moduluo based language

ta Radvylf srik su shilani

Sounds similar to Risky

PyGamer0

what

ta Radvylf srik su shilani

Risky mods the length of the code by 2, to determine the structure

Adám

2

PyGamer0

14:42

the latter looks way better than the former

because its apl

ta Radvylf srik su shilani

2

PyGamer0

@taRadvylfsriksushilani lower quality :/

ta Radvylf srik su shilani

Yeah I threw it together in like 2m on google drawings lol

PyGamer0

lol

thejonymyster

whos the guy in the second pic

i thought it was spiderman

ta Radvylf srik su shilani

14:48

It's a JS programmer, jumping off a skyscraper

thejonymyster

ohh

not as relatable then

ta Radvylf srik su shilani

JS is like being bit by a spider, but not in that sense

thejonymyster

Changed My Mind

ta Radvylf srik su shilani

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And, while you're at it, Inject arbitrary code into a compiler

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