The Nineteenth Byte

OldSandboxPosts

1:00 AM

Sandbox posts last active a week ago: Construct integers from 1, -, and (

PyGamer0

4:33 AM

@Bubbler i am currently reading a book on arm, i copied a simple program to termux . tried assembling, and it failed.

Bubbler

What program and what command did you use?

New Posts

4:51 AM

0

Q: Spell out an integer... in NDos' way

Objective Given a positive integer, spell it out in the conlang I made. Specification Let \$n\$ be the inputted integer. \$n\$ shall be spelled out in the following specification. The entire spelling is case sensitive. With the decimal expansion of \$n\$, let d be the least significant nonzero di...

hyper-neutrino

5:52 AM

→ 1 message moved to The Nineteenth Bakery

PyGamer0

6:39 AM

@Bubbler a very simple program:

.global _start
_start: mov r0, #65
        mov r7, #1
        swi  0

tried nasm, yasm, and as .. they all error

as complains that the first operand of mov should be an int register, and an unknown mnemonic swi

Bubbler

swi is not an actual instruction

you need to use proper linux syscalls to print something

PyGamer0

@Bubbler oh

Bubbler

Try using my hello world without .thumb instead

PyGamer0

ok

(frick wrong keyboard layout)

Bubbler

.section .text
.global _main
_main:
    mov r7, #4         // 2704   syscall #4 (write)
    mov r0, #1         // 2001   fd #1 = stdout
    add r1, pc, #8     // a102   string address = (pc+4) + 4 (msg)
    mov r2, #13        // 220d   string length = 13
    svc #0             // df00   syscall

msg: .ascii "Hello, World!"

I think this should work with as

PyGamer0

6:53 AM

> h.s: Assembler messages:
h.s:4: Error: operand 1 must be an integer register -- `mov r7,#4'
h.s:5: Error: operand 1 must be an integer register -- `mov r0,#1'
h.s:6: Error: operand 1 must be an integer or stack pointer register -- `add r1,pc,#8'
h.s:7: Error: operand 1 must be an integer register -- `mov r2,#13'

Bubbler

huh

maybe gas?

hyper-neutrino

well i'm trying to make a chat bot and

somehow even when i provide "0" as my password it fetches an fkey successfully???

pxeger

hmm

hyper-neutrino

and then when i try to post to chat.stackexchange.com/chats/ROOMID/messages/new i get a 404??

pxeger

have you got some weird caching proxy in between or something?

hyper-neutrino

7:01 AM

the fkey never changes no matter what email or password i tell it to use which suggests that i'm not even getting the right field, but i basically copy-pasted npsp so idk how the fuck that's possible

PyGamer0

@Bubbler how do i install gas on termux?

> Colemak Club, Stage 1: 17.79 WPM 90.7% accuracy

Bubbler

7:39 AM

Hmm, actually mine was for arm32, and you need to code in aarch64 for android I guess

Bubbler

7:56 AM

@PyGamer0 you could try this code instead

Adám

8:19 AM

Is it just me or have all code blocks become invisible?

lyxal

Just you it seems

Bubbler

^

Adám

Hm, seems to be a font issue.

PyGamer0

@Bubbler worked!

Adám

Apparently "Cascadia Mono" is blank.

Bubbler

8:30 AM

@PyGamer0 Nice, welcome to aarch64 :)

Adám

Apparently:

5

A: Code editor appears blank

This happened to me on VS2022 and it was caused by the Cascadia Mono font being corrupted (by Windows update?). Issue also broke VS Code. Explained on this thread.

I installed the latest font and that solves the problem.

Razetime

9:00 AM

@Adám has cascadia added APL support?

Adám

I don't think so. Why?

Razetime

was wondering if you were testing that out

Adám

Not at all. Maybe a Windows update.

PyGamer0

damn raspberry pi pico is cheap.

Adám

@Razetime github.com/microsoft/cascadia-code/issues/553

PyGamer0

9:21 AM

@Bubbler time to learn some aarch64 assembly :p

Adám

@Razetime How did it go?

New Posts

9:39 AM

0

Q: Windows place file on certain point of a HDD

I realized just now, that a huge mechanical HDD has different read/write speed at the outer track than the inner one. I use one partition for the whole drive. How can I tell windows if I do CreteFile Winapi call, that I want to place a file in the inner tracks, because I do not want to use that f...

file-system

ophact

10:12 AM

I am officially a "fanatic".

so I own a bit of gold

Adám

10:35 AM

Congrats(?)

Razetime

10:50 AM

@Adám they look very good with the font.

still needs the rest of the glyphs however. will take a while, i suppose

Adám

Maybe it'd be an idea to add a section to apl.wiki/Fonts with links to issues for addition of APL chars to various mainstream fonts?

Razetime

it's an idea.. dunno if the links should be there, though.

Adám

11:08 AM

@Razetime I don't follow. Without links, it'd be pretty useless, no?

Razetime

nah i'm saying there's no need to put a pending projects section

the page lists fonts with full coverage and that should be enough

Ginger

12:08 PM

heyo ;

mathcat

12:19 PM

Mar 28 at 13:30, by mathcat

*cricket noises*

Ginger

12:34 PM

betcha weren't expecting to see me again

haven't been dead, just busy

lyxal

@Ginger no, no I was

Ginger

huh

lyxal

weekends are slow

plus I figured that the recent noise talks have scared a few people off conversations

so totally expected you back

Ginger

ok then

now, about that game I was working on

lyxal

y'all just ever look at all the files in your project directory and realise it's been that long since you've looked at the general file structure of the project that you forget what everything is?

because I do be like that

I really do

Ginger

12:43 PM

in reference to vyxal or something else?

lyxal

Vyxal, but also some uni assignments lately

Ginger

hm

just do what I do and shove everything into 3 files /s

lyxal

I think the intro to computer science fundamentals essay I've been writing basically non-stop for the last 2 weeks has finally gotten to me

I've forgotten how to code

or at least how to file structure

Ginger

wELL

lyxal

Also why tf is it easier to work with a group of internet strangers on a project than it is to work on a project with people I've met IRL?

like /srs tho

projects I've worked on here with y'all are easy to collab on

Ginger

12:46 PM

hm

lyxal

and they go smooth

but with a recent uni group, things were difficult af

Ginger

maybe we're just more... compatible with your way of thinking?

dunno

lyxal

i dunno

I just know that I really don't understand people sometimes

irl people that is

Ginger

well I am an irl people [citation needed]

lyxal

The fact I have a better perception of here than real life is probably grounds for concern

Ginger

12:47 PM

¯\_(ಠ_ಠ)_/¯

why does this website exist

lyxal

I see the main page and raise you their disclaimers page

Ginger

ಠ_ಠ

lyxal

The way I see it, it's free real estate for citations if you ever needed to reference why the factors of 36 do be like they are

because holy frick is it hard to find credible sources on things you'd expect there to be a lot of information on

say for instance the role of discrete mathematics in addressing the need of algorithms and complexity

Ginger

shame I can't just cite "common sense"

hm, Wikipedia often doesn't have citations for the intro bits of pages for things like elements and stuff

lyxal

@lyxal you can find 39543 metric frick-tons of blog articles/websites/quora posts/etc explaining the connection but the moment you try to find anything research paper or journal, you just get a big nope.

Ginger

12:52 PM

maybe there's a policy?

m90

Indeed: en.wikipedia.org/wiki/Wikipedia:LEADCITE

Ginger

knew it

lyxal

you know what I love doing? trying to fix bugs only to realise you're accidentally editing files in a version you downloaded from github instead of onto the actual repo files you have elsewhere

tons of fun

Ginger

f

mathcat

uh wat did i just type

lyxal

1:04 PM

some kind of cursed combination of quotations, slashes and the letter s

the real question is why did you just type

Ginger

sorry what

cursed_regex

mathcat

idk

fsk

Radvylf Programs

1:31 PM

@mathcat Looks like s/'/'''/ s/s/S s///s s/S//

mathcat

the what?

lyxal

@RadvylfPrograms closer to the first than the others

mathcat

I don't understand regex

Radvylf Programs

No, the first with the last three regexes applied to it

mathcat

aha

lyxal

1:34 PM

@RadvylfPrograms but I mean the actual message was pretty close

mathcat

I am very confused

lyxal

@mathcat no, you're mathcat.

mathcat

I am very confused too

lyxal

no, you're mathcat

that fact hasn't changed in the last minute

PyGamer0

lol

very confused

1:36 PM

no I'm very confused

lyxal

only because the fact changed in the last minute since I said it hadn't change in the last minute

very confused

okay true

lyxal

@Ginger have you ever seen my website of my favourite things?

oop looks like you have

man this github skyline music slaps

skyline.github.com/Lyxal/2021

Adám

2:46 PM

@lyxal What is Skyline for?

pxeger

Just a gimmick I think

or, more charitably, a proof-of-concept for 3D graphics on the web

PyGamer0

ok how does this look?

do yall see code with syntax highlighting?

pxeger

Could do with some margin on the sides

but looks good

@PyGamer0 yes

PyGamer0

ok cool

i just need to tweak the colors to match my nvim theme

and i need to import the different font styles..

Adám

3:02 PM

@PyGamer0 Yes.

user

@lyxal you do realize we’re people right?

We’re not all chatbots

I think it’s just that everyone here has some experience with programming

Also, if you’re talking about vyxal, part of the reason is that it’s your language so the rest of us are fine with decisions you make that we don’t completely agree with

If it were my langUagr id be disregarding everyone else’s advice all the time

I do have to admit, I’m a nicer person here than irl and i assume others do that too

@PyGamer0 yes, could be more variation in colors tho

Seggan

@lyxal or trying to fix a certain bug, wracking your head over why you cant find it, and then only realizing youre on an old branch

user

@lyxal computer science essay? That sounds dumb

@Seggan i feel this, i wish my editor yelled at me whenever i madr changes on the wrong branch

Cmp: are you more or less the same in tnb as you are irl?

Romanp

3:20 PM

@user No. For some reason, I get off-topic here way easier than IRL.

user

Same. I feel chattier here than irl. Might be part of why we get off topic so easily

Bgil Midol

3:32 PM

Feedback?

user

I feel like a dupe might exist somewhere (but with numbers directly instead of characters)

Adám

@BgilMidol Would be more interesting if the alphabet was given as an input.

Bgil Midol

ok

Adám

(Also to avoid having to golf that constant)

user

To make it less trivial, maybe the amount to shift by could also depend on somd input

Bgil Midol

3:42 PM

@Adám Added

Adám

@BgilMidol OK, but now you need some alternate test cases, and don't forget to specify what can and cannot appear in the two inputs. E.g. the alphabet has no duplicates and the string always consists entirely of characters from the alphabet.

Bgil Midol

@Adám added

DLosc

@lyxal IDK, I have trouble with both :P

Adám

@BgilMidol meta.stackexchange.com/q/358847/317948

Huh, why didn't that one-box?

Bgil Midol

maybe because of the ping

DLosc

3:55 PM

@user Generally, yes. I'll talk about different topics in the different contexts, but I'd like to think I'm basically the same person everywhere.

Bgil Midol

@Adám fixed

pxeger

@Adám because it contains a username mention

oneboxing only happens when the message contains only the link and possibly a :12345678 reply marker

DLosc

Huh, TIL

Adám

SE chat FTW

Radvylf Programs

Noooo wayyyyyy...TIL you can split sqrt(a + b) into sqrt(f(a)) + sqrt(a - f(b)), where f is a moderately complicated formula

Adám

3:58 PM

@BgilMidol "Given a string consisting of only letters of the alphabet" seems to contradict the last test case.

Doesn't have to be a contradiction, but you may want to be a bit more clear about what you mean by "alphabet".

ophact

@RadvylfPrograms Could be an interesting CMC. Figure out what f is such that the formula holds true for any nonnegative a, b

PyGamer0

@user umm i said i am trying to make it look like my nvim colorscheme

camo.githubusercontent.com/…

^ roughly how it should look

(may be outdated)

Seggan

@ophact or just make it an actual challenge

Adám

@BgilMidol The title "Shift code points gradually" is a bit misleading. Nothing to do with code points, afaict.

ophact

@Seggan Was referring to Radvylf's specific case, but it could indeed make a fun challenge

DLosc

4:01 PM

@Seggan Seems more like Puzzling.SE: once somebody figures out the formula, there's no challenge for anyone else

Radvylf Programs

^

@RadvylfPrograms Wait, it's not f(a) and a - f(b), it's just a formula f that uses both a and b, so f(a, b) and a - f(a, b)

PyGamer0

rate my c code

ophact

> int main(void) {

I don't know C

but that looks weird

Bgil Midol

@Adám fixed

pxeger

@PyGamer0 looks like a highly efficient sort...

PyGamer0

4:09 PM

@pxeger o_¶

wdym

ophact

@ophact You pass a function as your argument?

pxeger

int main(void) just means that main ignores its arguments

PyGamer0

@ophact main takes no arguments

pxeger

I believe it's a special property of declaring main that you can do that

Adám

@BgilMidol You should harmonise your input nomenclature: "string" vs "input"

PyGamer0

4:10 PM

@pxeger wdym

Adám

I also recommend defining a bit clearer what "shift" mean.

ophact

int main(void) looked weird because since I know a tiny bit of Java I thought it meant that you would pass a "void" as your argument, i.e. a function returning null. But the actual functionality makes sense now,

pxeger

void isn't a function returning null, it's a type with no properties

ophact

in Java I believe it was a function returning null or with no return type? I might be wrong about that one too

Radvylf Programs

@ophact Ugh you just reminded me JS has a void operator

ophact

4:12 PM

it does?

Bgil Midol

@Adám fixed

pxeger

@ophact it's the return type of a function returning nothing

Radvylf Programs

Yep, the only time it's ever used is javascript:void(0) links

It just returns undefined

PyGamer0

@pxeger honestly i forgot how to make bubble sort, but that anyways works lol

pxeger

@RadvylfPrograms it's sometimes used by JS minifiers

(although why not use {}._ or something?)

Radvylf Programs

4:13 PM

Yeah, I could see it being shorter in a few very rare cases, though void and [][0] are the same length

And if you don't care about being nice [].x is shorter still

And if you have some variable x you know is a non-nullish primitive type, which chances are you do, and you're a psychopath, you can do x.x

ophact

@RadvylfPrograms I remember the time you said that JS was the "English of programming". The void operator is a good example

Bgil Midol

@RadvylfPrograms what about just x?

ophact

ReferenceError

Bgil Midol

(if x isn't defined)

Radvylf Programs

That'll error unless x has been declared with var

Adám

4:15 PM

@BgilMidol Hm, not sure that helped. How about something like "find the location of the first char in the wrapping string and replace it with the wrapping string char 1 step to the right of that, find the second char in the wrapping string and replace it with the char 2 steps to the right, find the third and replace it with the char 3 steps to the right, and so on."

Bgil Midol

@RadvylfPrograms top.a seems to work

Radvylf Programs

That's just as long as the [][0] or void option, but doesn't always work

Whereas x.x (where x is a primitive) will always work unless a .x method is added to it in a later JS standard which is pretty unlikely

Or someone does stuff like String.prototype.x

And enters the realm of dark javascript™

Seggan

is returning a function that does the actual calculation allowed in challenges?

i.e.

Radvylf Programs

Yes, as that'd be currying with an unused input

Both of which are allowed

Unrelated String

^

Seggan

4:23 PM

function add() {
return (a,b) => a + b;
}

@RadvylfPrograms what is currying?

Radvylf Programs

It's where you take input like (a)=>(b)=> instead of (a,b)=>

caird coinheringaahing

@Seggan If you really wanted to, you could do add = () => (a) => (b) => a+b

Seggan

ah

ty

Radvylf Programs

@RadvylfPrograms This is almost like currying the input rules regarding currying lol

hyper-neutrino

4:39 PM

ok so i'm trying to just send a message to SE chat in node and this is the sequence of requests i'm getting (up until before the send-message request) gist.github.com/hyper-neutrino/f1a2ff88fb54af3ed2e128a644bbf422

notably my password is not "0", but i still get an fkey somehow, and the fkey is the same even if i use my other email, and it's not equal to the fkey i get from inspecting the requests in the network tab

it's weird cuz i believe i'm just copying what npsp does to authenticate but it's clearly incorrect

caird coinheringaahing

@hyper-neutrino "0" is a super strong password tho, it's so simple, no one will ever guess it :P

3

hyper-neutrino

true, brb gonna change all of my passwords to 0 :P

Bgil Midol

@Adám fixed

Radvylf Programs

@hyper-neutrino Is that happening when you use your correct password?

hyper-neutrino

@RadvylfPrograms seems like it, yeah

Radvylf Programs

4:49 PM

Might be a cookie issue then

Adám

@BgilMidol Maybe "Given an input string and a wrapping string, find the location of the first input string char in the wrapping string…"

hyper-neutrino

possibly. i might just copy your cookie thing; i tried making my own but it could be causing issues. i'll copy the npsp code and put some logging code in it and run it on a test account and see if i can find any discrepancies

Radvylf Programs

I'd try using curl to do the process manually (with lots of flags for verbosity) so you know what cookies you know to look for

Or yeah using NPSP's request and looking for differences

hyper-neutrino

ah, yeah, i'm missing the prov cookie in the third request... idk how i missed that, i could've sworn i looked over each request to check for cookie issues. but i should be able to fix that easily then

pxeger

5:12 PM

what is stackoverflowsolutions.com?

Radvylf Programs

This is a corporate part of SO I don't think I've seen before

Looks like it's just selling SO for teams but with fancy wording though lol

If you want to seem professional, add "solutions" to your name.
- Radvylf solutions

Bgil Midol

@Adám fixed. is it ready to post?

Adám

@BgilMidol You didn't add "input string"

Bgil Midol

where?

Adám

"Given an input string and a wrapping string, find the location of the first input string char in the wrapping string…"

Also, I think you should have a test case where one needs to wrap around multiple times.

Bgil Midol

5:18 PM

@Adám fixed (hopefully)

@Adám example?

Adám

If the input string is longer than the wrapping string, a character found late in both strings will wrap around multiple times.

Bgil Midol

@Adám fixed

Adám

@BgilMidol That result doesn't look right to me. The first 2 should shift twice. First shift gives 1, second shift gives 2, or am I missing something?

Do you have a reference implementation?

Bgil Midol

no

@Adám i think i fixed it

Adám

@BgilMidol I strongly recommend always solving a problem before posting it. This will help you catch lots of issues, including typos and problems with the spec.

5

@BgilMidol I'm not sure. The 5th 1 should shift 5 times: →2→1→2→1→2, no?

Bgil Midol

5:35 PM

@Adám made a example implementation

Adám

OK, great. Imo, you don't need to include an implementation, just need to have one. Also, you should run all your examples through your implementation.

Bgil Midol

@Adám checked (and fixed) all of the test cases

Adám

Looks good to me then. You may want a second opinion, though.

New Posts

5:58 PM

0

Q: Shift a string gradually

Given an input string and a wrapping string, find the location of the first input string char in the wrapping string and replace it with the wrapping string char 1 step to the right of that, find the second char in the wrapping string and replace it with the char 2 steps to the right, find the th...

code-golf string

Radvylf Programs

I wonder how much easier it would be to design and construct a nuclear weapon, given a sufficient amount of fissile material, today compared to the 40s, given that we know it's possivle, have some amount of knowledge of how they work, and can do computations that took hours in just seconds.

DLosc

Rough ballpark guess, based on the amount of progress North Korea seems to have made: easier, but still not very easy.

Radvylf Programs

Oh true

Well there goes my plans for the evening

Bgil Midol

6:24 PM

CMQ: Can (and should) I answer my own question?

Adám

Yes, but if doing so in a mainstream/popular language, hold off for a while to give others a chance. I'd say a week is fine.

Radvylf Programs

^

Adám

@RadvylfPrograms Depending on the amount of info you have available, the design phase would probably be measured in hours rather than days. Construction time would entirely depend on how much "from scratch" we're talking. I'd say anywhere from a few days to a few thousand years.

DLosc

@BgilMidol I'd say hold off for a while even if not answering in a popular language.

Radvylf Programs

@Adám Well, the info available would just be what an ordinary group of half a dozen or so people, perhaps some with nuclear physics degrees at most, would know.

Adám

6:31 PM

A basic nuclear weapon is incredibly simple. Separate two 0.75 × critical mass blocks by a lead wall and spring load them together. Detonation mechanism will be to remove the wall, causing the springs to quickly join the two blocks.

"Safe" construction, storage, and delivery is a whole other question.

Radvylf Programs

Hmm, true. I was thinking a plutonium one, but I suppose "given a sufficient amount of fissile material" is vague enough to include HEU

Adám

Don't try this at home.

@RadvylfPrograms Plutonium-239 will make for a handy little bomb. Two 7.5 kg blocks should be in the right ballpark. Can fit in a large backpack or suitcase.

Radvylf Programs

...that'd just fizzle

Adám

The backpack? Surely, if you slam together the 15 kg of P239, you won't live to regret it.

Radvylf Programs

The problem is, it blows itself to pieces before the reaction really gets going. That's why they went through the trouble of engineering implosion type bombs even in 1945.

A gun-type plutonium device just isn't viable

Adám

6:43 PM

Ah, I see.

ATO

How tf do I log out of StackExchange?

Radvylf Programs

Click the SE logo in the right of the topbar

ATO

(A separate question is why I'm suddenly inexplicably logged in as ATO instead of pxeger)

Radvylf Programs

pxeger

Yeah I got it, thanks

DLosc

9:32 PM

@NewPosts Further evidence that Pip is often about as golfy as APL

Seggan

10:50 PM

stupid math question: is 123x^y (123x)^y or 123(x^y)?

forest

@Seggan Exponents are evaluated first.

So 123 * x ^ y = 123 * (x ^ y)

Seggan

ik that just when doing algebra its so tantalizing to think that the number right next to the variable is evaluated first

ty for confirming my fears

Unrelated String

the alternative precedence would be unbelievably scuffed

DLosc

What's the best way in a BQN dyadic tacit function to apply a monadic function F to the left argument, apply a different monadic function G to the right argument, and then apply a dyadic function H to those two results? I've got F∘⊣ H G∘⊢, but that feels super clunky.

Specifically, I'm trying to write a function that takes two strings and returns a list of N copies of one string, where N is the length of the other string. ⋈∘⊣⥊˜≢∘⊢ is what I have now.

Seggan

11:09 PM

wait why did my edit apply immediately without approval?

DLosc

@Seggan Welcome to 2k rep :)

Seggan

ik it allows me to review suggested edits but insta-approval?

DLosc

Yep

forest

It needs two people to approve an edit suggestion, but you can bypass that by doing "edit and improve".

DLosc

@forest I think they mean that their own edits are "insta-approved," i.e. don't need to be approved by anyone else.

forest

11:15 PM

ah

Yeah, that's a 2k rep thing.

lyxal

11:57 PM

Fridge water is not a good thing to put into your drink bottle for the night. It tastes okay in theory during the day, but that stuff just tastes odd 9 hours later.

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