The Nineteenth Byte

StackMeter

10:12

yo

it's ya boi

back with an extra 18 rep

that's right

Wasif

Hi StackMeter

StackMeter

18

sup Wasif

Wasif

Weren't you in 69 rep when you last came here, so you haven't you got extra 24?

StackMeter

it was 61. then down to 49, then up to 79

hyper-neutrino

anyone else keep getting BSOD after the most recent windows update

i think my computer decided to update itself despite me telling it it wasn't allowed to do that and now it keeps crashing because microsoft is utterly incompetent at everything

Adám

10:21

@Wasif About the Bangladeshi flag: How shall we do rounding?

Wasif

i haven't updated windows yet, to what build you get BSOD

@Adám Now what is rounding (sorry)

Adám

@hyper-neutrino One of my colleagues has reported something like that. Apparently about 5% see issues after the latest update.

hyper-neutrino

Edition Windows 10 Home
Version 20H2
Installed on ‎2020-‎11-‎06
OS build 19042.867
Experience Windows Feature Experience Pack 120.2212.551.0

Lyxal

@hyper-neutrino get a load of this guy, updating Windows! :p

I just never let it update

hyper-neutrino

@Adám oh, only 5%? unlucky then, both my brother and i encountered this

see i tried to not update but i left my computer asleep last night and it seemed to have decided to update anyway

Lyxal

10:22

Wow imagine not having a sleep and don't update option

Made by surface gang

hyper-neutrino

i've frequently had instances in the past where my computer network just stops working entirely or it keeps freezing or just crashes and almost every time i force restart it applies an update when it reboots

Adám

@Wasif Let's say I render a 30px by 50px flag. The centre of the circle should then be 27.5px from the left edge. But what if I cannot (easily) address half-pixels?

hyper-neutrino

i'm starting to wonder if my system intentionally causes issues to force me to restart so it can apply the update that i really don't want to download

it's something i could see a company like microsoft doing

Lyxal

@hyper-neutrino what brand is this forceful computer?

Wasif

@Adám Then wouldn't you choose a different resolution?

Adám

10:24

@Wasif Should I? If so, you must specify it in your post.

StackMeter

never mind, just got to 89 rep pog

hyper-neutrino

@Lyxal HP

StackMeter

we might hit 100 soon

Adám

@Wasif Am I allowed to render a 6×10 pixel flag?

Lyxal

@hyper-neutrino hp is just generally bad

@StackMeter you might.

Wasif

10:26

@Adám I am getting confused with the pixels, how about setting the minimum res to the res of the given picture?

Lyxal

@StackMeter One never knows how soon things can happen

Adám

@Wasif Either way, you have to specify a minimum resolution in your post.

And we still need rounding for the irrational numbers at the edge of the circle.

Wasif

@Adám okay i'll do it soon

StackMeter

@Adám might just double the size

to eliminate fractions

Wasif

@StackMeter It took nearly a month for me to get past 1 rep in Stack overflow, who knows when what happens

StackMeter

10:28

though the rounding must still stay for the circle

Adám

@StackMeter There's no multiplication factor that'll eliminate fractions of irrational numbers.

StackMeter

but for the half-pixels it would work

Adám

Sure. I was just using it as an example of what rounding means.

StackMeter

but yeah there is gonna be rounding, no way around it

I would say keep it as close as possible for the resolution

Wasif

@Adám is 286*176 ok? (The res of example image)

Adám

10:31

@Wasif Up to you, as long as you specify what to do regarding rounding.

StackMeter

That seems fair

rip spelling

*fair

Lyxal

I know right

Wasif

@StackMeter you can edit your post

Lyxal

@StackMeter spelling hard

Adám

@StackMeter Pro-tip: Press UpArrow and fix it.

Wasif

10:32

instead of posting broken messages

StackMeter

yay it fixed

Adám

@StackMeter Next up: fix that message.

StackMeter

press f to pay respects

Adám

CMC: Implement a stack meter, i.e. return/print the depth of the stack at the point where your function/program was called.

rak1507

that's ⎕SI or something right

Adám

10:35

Yeah, StackMeter←{≢1↓⎕SI} should do it.

Lyxal

@Adám is depth the deepest dimension or is it length of stack?

Adám

@Lyxal I mean the calling stack.

StackMeter

@NewMainPosts I'm going to be the first answer on this problem

Lyxal

@Adám but is depth length or deepest/highest level of nesting?

hyper-neutrino

in python, lambda:len(stack(0));from inspect import*

Adám

10:38

@Lyxal You mean to ask what the technical term "depth" means in APL land? afaik, a call stack is a linear list without branches. Correct me if I'm wrong.

Wasif

@Adám len(inspect.stack(0))???

You can see the whole call stack from inspect.stack(), so currently taken depth would be len(inspect.stack(0))

rak1507

need to import inspect like hyperneutrino's answer

Adám

@hyper-neutrino @Wasif not sure what the 0 does, but are you sure it isn't off-by-one?

Lyxal

@Adám oh right. You mean function call stack, not array depth

But in APL land, what is depth?

hyper-neutrino

not sure what the 0 does, but removing it seems to work :P

Adám

10:40

@Lyxal apl.wiki/depth

hyper-neutrino

changing it to another number... doesn't seem to change the result either.

Wasif

I think it is the current depth of stack

inspect.stack() gives the whole call stack

Adám

> for the caller’s stack

Ah, so no, it isn't off-by-one, then.

hyper-neutrino

well it's almost 7am here and i don't seem to be getting any progress on this assignment so i'm going to sleep now o/

rak1507

what's the assignment (if you're allowed to say)?

Lyxal

10:44

@Adám Vyxal, `ʀ¦_∧ǔ`E

StackMeter

@hyper-neutrino bro I have a 1000-word essay I put off for a week to play Minecraft

put that through ROT-13, it might say somethin

Lyxal

@Lyxal this only works in the offline interpreter

it pushes the compressed string "context_level" and evals it as python

Vyxal keeps track of the levels of depth your program flow goes into internally

Adám

Heh.

@Lyxal Does it have TCO?

Lyxal

@Adám Total cost of ownership?

Adám

Tail call

In computer science, a tail call is a subroutine call performed as the final action of a procedure. If the target of a tail is the same subroutine, the subroutine is said to be tail-recursive, which is a special case of direct recursion. Tail recursion (or tail-end recursion) is particularly useful, and often easy to handle optimization in implementations. Tail calls can be implemented without adding a new stack frame to the call stack. Most of the frame of the current procedure is no longer needed, and can be replaced by the frame of the tail call, modified as appropriate (similar to overlay for...

Lyxal

10:47

probably not

it only stores the depth so that the implicit input system knows which arguments to use

Adám

Ah, so you're actually hacking the system.

Lyxal

pretty much

I'm eval'ing a function defined in the interpreter

hence why it only works offline

Adám

How so?

Lyxal

it doesn't work online because the online interpreter has safe eval on

Adám

Why, though?

Lyxal

10:49

because if I just used regular python eval, people could try and eval bad things

Adám

Ah, you don't have a sandbox.

Lyxal

no

I don't know how to do that

and it seems too much for a simple programming language not used by many people

Adám

Right, so it is like TryAPL.org which also uses a safe eval.

Lyxal

Yeah

let me find the pattern i have

(\[(((-?\d+(\.\d+)?)|\g<1>|"[^"]*"|'[^']*')(, *)?)*\])|(-?\d+(\.\d+)?$)|"[^"]*"|'[^']*'

rak1507

oh christ

Lyxal

10:51

that somehow works

rak1507

that is a regex and a half

Adám

I recently enhanced TryAPL's safe eval so it allows using eval in eval but automatically makes sure to replace your eval with the safe one, ad infinitum.

Lyxal

@rak1507 there's a reason I switched away from re to regex

rak1507

that makes me want to cry

Lyxal

it's recursive too

rak1507

10:53

why would you do this

Adám

@rak1507 What does?

rak1507

that regex

Adám

To allow (some) eval in code.

Lyxal

^

rak1507

surely there's a better way

Adám

10:54

Worked for me.

Lyxal

@rak1507 this is for an esolang mind you

you're considering extra work for code golf

smh

rak1507

true

Lyxal

the whole point is that we hack stuff together, pray it works and then relish in our mess when it gets fake internet points

4

Adám

:-)

Are you not worried that you missed something and might expose your server?

Lyxal

@Adám it's pretty much all open source anyway

and besides, it's a free server

as in I'm not paying anything and I don't own it

Adám

10:57

Right.

Wasif

What server?

Lyxal

pythonanywhere.com

the site in question which utilises the regex

wow well done markdown.

Adám

Yeah, I have to be a bit more careful with our TryAPL server, even though it is running inside Docker inside a virtual machine. But the virtual machine is running on our own hardware in a data centre.

StackMeter

@NewMainPosts ayy, first answer on a question

first time too

rak1507

@Lyxal is flask multithreaded or whatever? does it support multiple concurrent executions?

Lyxal

10:59

@Adám If I was actually paying for/maintaining the server I'd probably be more careful too

@rak1507 honestly I don't know

never tried it

rak1507

quick everyone run a slow vyxal program and see what happens

app.config['SECRET_KEY'] = 'n3vagljfd;lkgern;glkn4erg]po_*&)#M(VNP#UC<P{M@OW#X*()R#M*R<JP(R' hmm

Lyxal

I'll tell you the results in a minute

because I set it to timeout after 60 seconds by default

rak1507

lol I hope that's not important

Lyxal

nah

my phone and computer are both running {} at the same time

so far so good

rak1507

cool

Lyxal

11:01

okay the phone just finished

it timed out as expected

the computer is still going

frick

rak1507

I want to write a simple golf site a bit like anagol but I'm not sure what to use for it, I thought flask might be too slow, looked at IHP a bit, but it looks quite complicated

Lyxal

okay it just finished too

rak1507

sounds like it's not concurrent then

Lyxal

no

rak1507

can you do an experiment where you run something slow and try and run something fast on a different device?

Lyxal

11:04

sure

the computer will be running ÞF 10000Ẏ (take the first 10k Fibonacci numbers)

the phone will be running 0 1000(n+), (sum the first 1k numbers)

phone finished almost instantly

rak1507

while the computer was running?

Lyxal

yep

computer just finished

rak1507

hmmm

StackMeter

also

I nominate the legend who upvoted 4-5 of my posts today

for owner

Lyxal

thank you

i appreciate

Wasif

11:13

It wasn't me who upvote you :P

Lyxal

47 mins ago, by Lyxal

@StackMeter One never knows how soon things can happen

;p

StackMeter

ok then

I nominate Lyxal for owner

I got memed on by Wasif; gg to them

lol

also finally downvotes pog

Wasif

Let's relax! I was sweating on excitement, its too golfed now in 170 bytes

Lyxal

there's no such thing as too golfed

StackMeter

ok I think Wasif is done

he can't golf this much more

Wasif

11:26

I think so

Good luck

StackMeter

20 minutes

20 minutes

and he halves the byte count

Wasif

No! 165 bytes

Last else is not needed as return breaks out of the function

StackMeter

I should have known

but this is it

pxeger

11:43

@Wasif what challenge is this for? It can probably be much shorter

StackMeter

oh please god no my code has been compressed to deadly levels

how do you even do this?

no, but seriously, how?

to compress it further, you'd have to change the underlying code itself

and I don't know how to do that

pxeger

What do you mean by the "underlying code itself"?

Wasif

@pxeger the recent rarity challenge

@StackMeter my golfing is just nothing

Deadliness is still remaining....

Lyxal

@StackMeter you know what they say: it takes a community to golf an answer

Neil

@cairdcoinheringaahing out of interest, how are you testing that?

rak1507

11:54

codegolf.stackexchange.com/a/223303/95516 how come this takes two inputs when the challenge says to take 1?

I don't get what the problem is

Wasif

146 bytes!

StackMeter

welllllll

gotta go make another edit

that's 6 at this point

rak1507

please could you add test cases on TIO? (it's good practice to do that with all your answers anyway)

oh, so it takes n and nmax?

Lyxal

143 lol

Adám

@rak1507 Heh, ⍎'⎕SI'⍨ should work.

StackMeter

11:58

sorry @Lyxal we're already down to 140

Lyxal

@StackMeter where?

It's currently 145

Not 140

pxeger

on the answer itself, in the comments

I got it down to 92

Wasif

Our community effort shorten the code by 1/3

:-)

rak1507

can you return it as a tuple of numbers not strings with a and b?

Lyxal

89

Wasif

12:02

Let's give StackMeter bit rest :P

He may be tired of editing

rak1507

xnor will probably come along with a 50 at some point

Lyxal

It's just one last edit

@rak1507 yeah probably lol

Wasif

How many edits have been there

StackMeter

8 afaik

idec at this point

how did we get from 266 to 85 bytes

Wasif

magic :-)

pxeger

12:05

@cairdcoinheringaahing I've just seen your recent bio changes, and I happen to know of someone called Jay who uses mixed pronouns and lives in the UK... is this a crossover episode? Do you happen to know a Beth?

rak1507

@StackMeter by not golfing it in the first place and changing the output...

Lyxal

Inb4 jelly 6 bytes

Wasif

@math i was going to tell you this but you went offline. I have just translated pylite in python: github repo you might be interested

Lyxal

@StackMeter the program in the answer doesn't match the byte count

math

@Wasif Wow, nice.

StackMeter

12:16

it's 83 characters, and 83 bytes

Lyxal

My byte counter says 89

pxeger

It's definitely 89 as it is in the post

math

@Wasif Looks like python is an easier programming language to program programming languages. I used JS though, because I wanted an online interpreter. I don't know how to make that in python (other than Flask)

Lyxal

Flask is easy enough

You just need to wrap the interpreter in a function

caird coinheringaahing

@Neil Running local arenas, and I added in a print functions after each match so I can see the points breakdown

StackMeter

12:18

rip - posted the worng code

math

@Lyxal Really? I thought Flask only runs in localhost?

rak1507

you what

Lyxal

@math the vyxal interpreter uses flask

pxeger

@math no, you can put Flask on a server (e.g. Google App Engine)

caird coinheringaahing

@pxeger I do know someone called Beth (a couple of people called Beth actually), but not very well, all the Beths I know are casual acquaintances

Wasif

12:19

Yes you can try Flask

@math have you planned the rest of the syntax

pxeger

@cairdcoinheringaahing hmm ok. The Beth I know knows the Jay I know very well

Lyxal

@math pythonanywhere.com is where you can host flask for free (example site: lyxal.pythonanywhere.com/)

caird coinheringaahing

@pxeger Is the Jay you know openly gay?

pxeger

@cairdcoinheringaahing I don't know Jay directly at all, and I don't know Beth very well, so I don't know. All I know is that Jay changes pronouns regularly when Beth talks about them

caird coinheringaahing

@pxeger I'm guessing that we don't know the same Beth :P

pxeger

12:22

@cairdcoinheringaahing that's a shame. I was hoping for a crazy coincidence

caird coinheringaahing

Unless there's a Beth on my life who talks more about me than I know about them, which I suppose would be more concerning than if we have any social connection to each other :P

math

@Lyxal Thanks, I'll try it. I'm definitely more comfortable in python than in JavaScript.

pxeger

@cairdcoinheringaahing I highly doubt you'd have a girlfriend without having noticed

Lyxal

@math I suggest you look at the flask_app.py file and the execute function in Vyxal.py for a look at how I did it

caird coinheringaahing

@pxeger Well, as I alluded to before, I'm openly gay, so I'd be very confused if I did have a girlfriend at all :P

pxeger

12:25

well yeah

math

@Lyxal Ok, I think I'll start again from scratch (except the html file) to design to code.

math

12:42

@Lyxal Then the name will be better. :P

Redwolf Programs

:o

Arnauld just got outgolfed

pxeger

Pog, where?

Redwolf Programs

This answer

pxeger

gasp

Redwolf Programs

It's using Node.js and Arnauld's using ES6, but I don't think they're using any features specific to Node or V8

New Main Posts

12:49

0

Q: Taxi Helper Program

Imagine you're a Taxi driver. Everyday you drive, pickup passengers, pay for fuel, and get paid for driving. Your daily routine: The starting place is the Taxi Garage. Drive the taxi from on place to the other. Every Place has an event, like add numerical passengers, print a passenger to stdout,...

New Sandboxed Posts

13:02

0

A: Sandbox for Proposed Challenges

Interpret ASCII control characters like a terminal code-golf string typography Given a ASCII string containing control characters, compute what it should look like when printed to a terminal. Imagining the behaviour of a cursor, this is how to treat each character in the input: 0x08 backspace (\...

user

13:21

@Adám Thread.currentThread.getStackTrace.length, I think.

Redwolf Programs

13:48

My OEIS sequence got rejected because the first 100k terms are identical to another one

caird coinheringaahing

I mean, I kinda get that. It's not like they list the first 100001 terms of each sequence :P

Redwolf Programs

I should submit "Terms in A343327 with an offset of 100000" :p

caird coinheringaahing

That could actually work :P

Redwolf Programs

Actually because of the way the sequence works it'd just be the original one but incremented

I'll still make a challenge about it because it's interesting to golf

caird coinheringaahing

Only 4 users have ever gotten 2 or more different tag synonyms approved (table): Alex A (2), me (2), Peter Taylor (2) and Martin Ender (7)

rak1507

13:56

@RedwolfPrograms that's interesting that it becomes different, what is the sequence?

Redwolf Programs

@cairdcoinheringaahing Would've been me but I let you take decode :p

caird coinheringaahing

@RedwolfPrograms More like I sniped it out from under you :P

Redwolf Programs

@rak1507 It's minimal coin changing, basically it becomes different because the other sequence used coin denominations up to 50k, while mine continues 1, 2, 5, 10, 20, ... and so on

caird coinheringaahing

I'll happily let you do the next one :P

rak1507

@RedwolfPrograms how do you define so on?

there's a very short apl solution to that using generating functions btw :P

oh no, minimal, not number of possibilities, nvm

Redwolf Programs

13:58

It's the hyperinflation sequence, a(3n) = 10 ** n, a(3n + 1) = 2 * 10 ** n, a(3n + 2) = 5 * 10 ** n

caird coinheringaahing

> Editing a question tagged with a synonym tag causes it to be replaced by the master tag

That's a helpful feature I didn't know about

> All good tag synonyms should eventually be merged (source). This retags all questions tagged with another tag – which is not automatically done when a synonym is created. As merging is not (easily) reversible, it should be done with caution. Only moderators can perform a merge.

Should we be bugging the mods to merge the tag synonyms that are still around, such as encode or mathematics?

Redwolf Programs

14:14

It's so weird posting a challenge and seeing New Posts immediately update

I'm used to twenty minutes of forgetting I just posted a new challenge until NMP reminds me

There are a few really interesting approaches to finding the nth term of that sequence that I know of, so it'll be interesting to see which one's shortest

Redwolf Programs

14:30

I have 47 bytes in JS, can't wait to see Arnauld or tsh do it in 20 :p

New Main Posts

2

Q: Number of coins needed to make change

Relatable scenario: I'm going to the store to buy a single item, but only have a $100k bill. As a result, I need exactly $999,979 in change, and in the fewest coins/bills possible because I'm quite obviously a very practical person. The denominations of these coins/bills follow the hyperinflation...

code-golf sequence

hyper-neutrino

@rak1507 i can't really say what it is but i need to use a language called MMIX which i'm not really a fan of so far :P

StackMeter

@RedwolfPrograms "precisely $999,979": a) shouldn't it be $99,979 and b) how is this relatable?

Redwolf Programs

a) yes and b) it's not and that makes it funny :p

caird coinheringaahing

14:57

@RedwolfPrograms is New Posts double posting for you or is it just me?

Wait, it's not double posting, it's misattributing answers

It's misattributed Arnauld's and Delfad0r's answers: i.sstatic.net/qUeuA.png

Redwolf Programs

Yep, two answers were posted at the exact same time pretty much

There's not really anything I can do about that

It only happens under extremely rare circumstances, and only if the answers are on the same question, so it's not really that important imo

Redwolf Programs

15:17

Husk, 05AB1E, and Jelly are tied lol

caird coinheringaahing

It annoys me that Husk has no way of doing integer compression :P

Any feedback?

user

@cairdcoinheringaahing Compress a string, convert to int, I guess

Redwolf Programs

uḲ[“0112212233}s is the shortest I can get in Ash :(

Maybe I should make my compressed integer operator useful in more situations

StackMeter

15:33

I swear to Christ Python can't win anything

2 hours of sheer optimisation and a 75+% reduction and it's still in last

caird coinheringaahing

It isn't exactly a golfing lang :P

pxeger

Not when competing against golfing languages, no. But answers compete with answers in the same language, because it just isn't fair otherwise

user

You can compete against other Python answers

pxeger

Try golfing in C++ :P

StackMeter

fair

though I am proud of this community for tearing into my answer and stripping the 2 from 266, leaving it as 66

user

15:35

C++ lambdas may actually be shorter

Or maybe not

pxeger

It still takes 4 or 5 bytes to declare a variable though (int or auto )

StackMeter

yeah

I guess that's why there's a "per language" leaderboard, since some languages would basically be nonexistent otherwise

caird coinheringaahing

@StackMeter I've reduced the strikethrough in the header, as it's kinda obtrusive, and just done some general formatting fixes, feel free to rollback anything you dislike

StackMeter

No, that's probably for the best since I can't format to save my life lul

New Main Posts

1

Q: Variable length Fibonacci word

Challenge For any two strings A and B, we define the following sequence : F(0) = A F(1) = B F(n) = F(n-1) + F(n+2) Where + denotates the standard string concatenation. The sequence for strings "A" and "B" starts with the following terms: A, B, BA, BAB, BABBA, ... Create a function or program tha...

code-golf sequence fibonacci

StackMeter

15:53

do you know he funny thing

I unlocked upvotes in two days but it took 1/2 a year to unlock downvotes

literally just unlocked it today

hyper-neutrino

apparently I have 22 downvotes cast (ignoring deleted posts, since they don't show up)

caird coinheringaahing

@StackMeter Yeah, it's not a good thing :/

Leads to the FGITW effect when a question hits HNQ

hyper-neutrino

i convinced my friend to post a handwritten assembly answer to a fastest-code challenge cuz everyone was posting in C and his opinion after getting a bunch of upvotes was basically

"seems whoever writes a moderately interesting answer first just gets all the upvotes"

which is, unfortunately, pretty accurate, sometimes minus even the "slightly interesting" part

StackMeter

I have cast a total of 0 downvotes

I'm not wasting rep on that till I hit comma levels

user

@hyper-neutrino The bang! question?

hyper-neutrino

15:59

yep

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