The Nineteenth Byte

Jo King

8:00 AM

at least the food will be close by

New Posts

0

Q: Continuous knapsack but fast

The input for the continuous knapsack problem is as follows. For each item 1...n we are given a positive weight and profit. Overall we are also given a positive capacity which is the maximum weight we can carry. The goal is to pick items so that the profit is maximized without exceeding the prof...

code-golf

Redwolf Programs

It's not too far of a flight from here, too bad I can't just go over there :p

lyxal

@RedwolfPrograms well you see, if you somehow managed to change your nationality to Australian, I'm sure we'd let you in

Admittedly, you'd probably have to take a mandatory 14 day holiday in a hotel,

But that wouldn't be too bad :p

I mean, sure, you have to pay for it yourself, and sure, it's actually self-isolation meaning you can't leave the the hotel

Redwolf Programs

It'd still be better than this place lol

hyper-neutrino

wait so what you're telling me is that the 2-week covid quarantine is actually... enforced upon entering australia???? :o

lyxal

8:07 AM

@hyper-neutrino pretty much

And iirc you get in trouble if you don't

hyper-neutrino

like what sort of trouble / what happens

lyxal

You pay a fine

maybe jail time

I'm not really sure

Redwolf Programs

Gov'ts: "If only there was some way to prevent COVID"
Australia: "How about making people actually follow the rules?"
Gov'ts: "If only there was some way to prevent COVID"

hyper-neutrino

hm ok. in canada idk exactly how it works so i'm not sure either but i'm p sure it's kinda sketchy and you maybe pay a fine and under some conditions you might just only need to stay for 3 days or smth

lyxal

@JoKing is this roughly accurate, seeing as how you're in the part of the state which is becoming a hotspot again?

hyper-neutrino

8:09 AM

IMO canada overall's been... bad with handling covid. like really bad

Redwolf Programs

Hawaii's actually pretty strict about COVID stuff, they're almost as good as Australia

Of course the population is significantly smaller

lyxal

@lyxal (by part of the state, I mean Sydney in general)

@RedwolfPrograms laughs in covid resurfacing in one of our capital cities

Jo King

@lyxal i'm pretty sure there is jail time

Redwolf Programs

I got a cold the other day, from my sister. First time since 2019 I think.

And "masks don't work" :p

Jo King

either that or you get deported

lyxal

8:13 AM

I suppose 55 active cases is still better than what the rest of the world is experiencing though

Jo King

it's a lot easier to do in a country with no land borders, i'm sure canada's getting screwed by dumb Americans illegally crossing the border

lyxal

Yeah that's true too. It's way easier to manage a virus when your borders are water

hyper-neutrino

canada was primarily getting screwed by planes entering the country due to airlines not being closed AFAICT - but i'm not sure

but yes, having land borders is definitely trickier

lyxal

Imagine having your airlines closed. Made by oh wait didn't they recently stop our travel bubble with New Zealand?

Jo King

you should build a wall or something

hyper-neutrino

8:15 AM

l o l

fun fact: my city now tops the province in new daily cases, even surpassing the greater toronto area (the previous hotspot by far) which has a much higher population and population density...

lyxal

And make the Americans pay for it :p

Redwolf Programs

Anyway, gtg o/

I'll try to check in again tomorrow

PyGamer0

@RedwolfPrograms o/

lyxal

Okay, go and enjoy sleeping lol

@JoKing haha you're in an area declared a hotspot by the Queensland government :p

Jo King

yuppers

lyxal

8:21 AM

But then again, so is the entirety of Greater Sydney

Jo King

every thing i was going to do this week has been cancelled

Razetime

@JoKing oh no

what happened

Jo King

i was actually planning to go to the shopping centre where the first case was found

lyxal

@Razetime Annastacia Palaszczuk, the absolute epic gamer, declared not just the city Sydney, but all places under the scope of Sydney a covid hotspot in relation to entry into Queensland

Mind you this includes areas with absolutely no covid

hyper-neutrino

our government is currently staging reopening phases

lyxal

8:24 AM

@hyper-neutrino for the first time or is this after subsequent snap lockdowns?

hyper-neutrino

@lyxal well we had an "extended spring break" which became a "postponed school reopening" which became "the whole school year is online" and then lockdown, stage 1 - ? of reopening, "emergency shutdown", phase 1 - ? of reopening, whatever they named the other lockdown, and then like some color coding, and now more stages of reopening

lyxal

Wow, that sounds, uh, complicated

We got the whole country reopened with re-lockdowns as needed

In a period of a few months starting in roughly May last year

hyper-neutrino

see your government seems like

somewhat competent

lyxal

In relation to covid? Yes

hyper-neutrino

well specifically around the pandemic, yes

idk about other things :P

lyxal

8:31 AM

Honestly, idk about the other things either lol

I mean, it definitely helps that we only have roughly 25 million people

I envy @Ausername though: their government had it way easier than us

You think we're remote? NZ is even more so than us

hyper-neutrino

that's fair enough :p

Jo King

i wish they wouldn't be so quick to reopen

hyper-neutrino

the exact opposite problem most people have with SO :p

but yeah I agree

like isn't multiple consecutive emergency lockdowns an indication that maybe... ya shouldn't have reopened that fast in the first place...

me: mm yes with these vaccines, in combation with wearing masks, distancing, and restricting travel, we can probably cut down / nearly eliminate coronavirus

government: yes we have vaccines now be free. oh wait everyone has the delta variant now

PyGamer0

What is the latest version of Java

cause my computer sir is saying "8, is the latest versoin of Java"

lyxal

@JoKing have you ever seen this?

PyGamer0

8:43 AM

@lyxal have you seen this

lyxal

@PyGamer0 yes, and I didn't need to click

PyGamer0

ok

Jo King

@lyxal "What's the most important thing in Australian culture? Lying to other people about Australian culture", perfect

PyGamer0

CMQ: Which esolang has Errors; traceback; error handling

hyper-neutrino

java

3

PyGamer0

8:59 AM

java is an esolang?

wasif

hi everyone

hyper-neutrino

from the front page of esolangs wiki:

> programming languages designed to be unique, difficult to program in, or just plain weird.

PyGamer0

@hyper-neutrino lol

wasif

lol java is esolang

@PyGamer0 you implement one

Jo King

@hyper-neutrino wow, it's all three, amazing

PyGamer0

9:00 AM

well my computer sir is saying JAVA is a SIMPLE language

wasif

what??

Java is simple?

PyGamer0

apparently from my computer book YES

wasif

you said your teacher said it

Adám

You can't just say something is such-and-such to make it be that (unless you're God).

PyGamer0

@wasif the teacher says everything on the book

Adám

9:05 AM

Well, you could say 1+1=3 too, but you'd be wrong.

PyGamer0

but we all know that 10 = 0

Adám

mod 10, yes.

wasif

@Adám Well I can prove 1=3

Adám

Java is a terse stack-based language designed especially for inductive logic programming.

wasif

sorry 1+1=3

Adám

9:08 AM

I can prove that 1+3=2

wasif

everyone can prove any x+y=z

PyGamer0

@wasif multiply both sides by 0

Adám

I can prove that 1+2>3

wasif

no if you need to multiply both sides of equations you need to multiply with a number that is not 0

@PyGamer0 ^

PyGamer0

@Adám how?

@wasif ok then multiply both sides by (1-1)

or infinity

wasif

9:11 AM

the proofs are made like they appearently look possible

@PyGamer0 Try it!

lol

@Adám wait how

;-)

@PyGamer0 Better?

wasif

the secret is APL operators are evaluated from right to left

so 2>3 gets evaluated first

and it is 0

and added with 1 is 1

;-)

Adám

9:15 AM

@wasif Strictly speaking, APL operators are actually executed left to right, but APL functions are executed right to left.

wasif

yes

i am not a nerd

Adám

Also, APL's execution matches how people tend to speak too.

Neil

bah, someone doesn't like compressed lookup tables

wasif

who?

lyxal

@Neil someone downvoted an answer of yours?

Better now?

A username

9:31 AM

@lyxal We're in level 2 tho :p

Neil

huh, the downvote mysteriously vanished!

A username

CMQ: Least favorite tag?

Neil

strange thing though is that the last digit of my rep didn't change

A username

Mine's restricted-complexity

Neil

never mind, I clicked in the wrong place

caird coinheringaahing

9:33 AM

@Ausername If I see restricted-time or restricted-complexity on a question, I won't even bother to read it

In a more "general" version, I'm not usually a fan of quine challenges

lyxal

@Neil it wasn't me

Adám

@Ausername If I see king-of-the-hill or cops-and-robbers on a question, I won't even bother to read it.

Neil

@Ausername arithmetic, I've got 220 answers but only 5150 rep

caird coinheringaahing

CMC: Given two integers a and b output the last digit of a to the power b. Your program should work on TIO (as in, display the answer without timing out) for all inputs up to 2^32

Neil

@Ausername actually it's really sequence, because it's often really just a decision-problem but more difficult for no obvious reason

A username

9:36 AM

@cairdcoinheringaahing You just said you hate restricted-time

lyxal

@Ausername if I see code-golf on a challenge, chances are I won't read it properly

A username

Um....

rak1507

@cairdcoinheringaahing pow(a,b,10) python

Neil

@cairdcoinheringaahing 1 byte: 0. It's the last digit in base a of course...

A username

et in vyxal

lyxal

9:37 AM

@Ausername I mean, usually it's because I'm too busy trying to fgitw an answer and I accidentally skip info lol :p

caird coinheringaahing

@Ausername Yes, because I think it's best used to untrivialise trivial challenges. Most of the time, it's used on interesting challenges but the OP wants to prevent a slower approach that isn't that boring

Recursive Co.

Yay, more Indonesian Gambling Spam!

A username

Me too

@RecursiveCo. Yay!

Neil

I guess I should amend that to !b, in case b is 0...

Adám

@cairdcoinheringaahing So we need powmod

A username

9:38 AM

aspodiozixcjiax? now they're just keyboard hashing.

caird coinheringaahing

@Neil Well, I suppose so :P

Neil

wait, I can do better: 1. This is in base a-1, so always works

Recursive Co.

One tag they did get right was "game".

A username

And hyper's asleep so they can't nuke it...

Caird can you nuke the nmp

caird coinheringaahing

@Ausername Just flag and downvote, it'll be dealt with but slightly slower than if HN's around

Recursive Co.

9:39 AM

I have a feeling these Indonesian people monitor when mods sleep then post right after that, this happened the last time, hyper fell asleep then IGS came up

A username

@cairdcoinheringaahing I did.

Recursive Co.

Worst part is that the poster's identicon looks like mine. I do not want to be associated with such posts

A username

@RecursiveCo. This is why NMP can be useful.

caird coinheringaahing

→ 1 very naughty boy moved to sit in the timeout corner

10

lyxal

@Ausername hehe my spam flag got accepted

caird coinheringaahing

9:40 AM

Oof, that's a hassle to do on mobile

lyxal

Not when I use desktop site on mobile by default

PyGamer0

CMC: Given an integer i, output the 7th root of it and then square the number.

A username

Uh...

Recursive Co.

@PyGamer0 So output, square and terminate without outputting again?

PyGamer0

wdym

Recursive Co.

9:43 AM

Do we output the squared number

rak1507

@PyGamer0 ⎕*7÷2

PyGamer0

take input > get the 7throot > square it > print it

lyxal

@cairdcoinheringaahing this is hilarious

Recursive Co.

Oh

rak1507

oops should be 2÷7

Recursive Co.

9:43 AM

n=>n**(2/7)

lyxal

@PyGamer0 7Ėe²

A username

I feel like something was lost in translation

I probably shouldn't have put it through 20 different languages.

PyGamer0

@Ausername 100s of years of experience

Adám

@PyGamer0 The order doesn't matter.

Recursive Co.

You can only play your first game at a casino.

A username

9:46 AM

That's great

caird coinheringaahing

> IDN players can play online and other games

Adám

@PyGamer0 dzaima/APL: 7√×⍨

caird coinheringaahing

Online is a game now?

StackMeter

I have a challenge here

Recursive Co.

> "even with hundreds of years", you can only play your first game at a casino".

Well, looks like that person didn't learn anything from the 300 years of experience

lyxal

9:46 AM

@RecursiveCo. well aren't I rebellious playing hold'em on my Nintendo DS at an age where I probably shouldn't have been doing so

StackMeter

CMC: rotate the string sns n 180 degrees

and for the second part

lyxal

@StackMeter no

I'd be a sussy baka if I did that

caird coinheringaahing

@StackMeter hmm seems kinda sus to me

A username

Yes

caird coinheringaahing

@lyxal Super Mario Bros literally has a casino "mode" where you can play poker and other casino games :P

StackMeter

9:48 AM

CMacroC: rotate a generic string 180 degrees:

PyGamer0

there should be a bot that automatically deletes IGS

caird coinheringaahing

That's called me and hyper :P

Recursive Co.

Or just a bot to filter out tags that don't match

@cairdcoinheringaahing Hello Robot

caird coinheringaahing

And smokey

lyxal

@cairdcoinheringaahing the one I played was called Clubhouse Games, and that was when I was around 7

StackMeter

9:49 AM

allowed characters: wmuniopqbdv^zxshjrl!#.',

Adám

@StackMeter Example case?

Neil

@cairdcoinheringaahing JavaScript: a=>b=>(a%10)**(b%4)%10

caird coinheringaahing

@PyGamer0 There's one that almost does that: Smokey. It auto casts 3 (?) spam flags on any spam it detects on the network

PyGamer0

@cairdcoinheringaahing how are you a bot

Adám

@Neil Doesn't that fail on big numbers?

Recursive Co.

9:50 AM

@Neil You're missing > in a=b

caird coinheringaahing

@PyGamer0 I'm 40% zinc, 40% copper, 40% titanium, 40% dolomite and I have a 0.003% nickel impurity that makes me me

7

@Neil Ooh, nice

Recursive Co.

Oh so there's a bot behind that dog you carry everywhere

caird coinheringaahing

Patch has legs, he can (and does) walk everywhere :P

Neil

@Adám question only asked for inputs up to 2^32 and this works for inputs up to 2^53

PyGamer0

@cairdcoinheringaahing hmm 40+40+40+40+0.003 ≠ 100

Adám

9:52 AM

@Neil Oh. I should have looked closer. You mod first.

PyGamer0

you are lying

Recursive Co.

@PyGamer0 Not in base 6.2425

Neil

you can use 4n and 10n if you want big int arithmetic of course

PyGamer0

@RecursiveCo. bruh

caird coinheringaahing

@PyGamer0 I'm also 40% storage space

A username

9:54 AM

@lyxal Can you modify the corpus to find the least used elements?

Recursive Co.

@cairdcoinheringaahing That's a lot of wasted storage

A username

This answer is amazing

caird coinheringaahing

@Ausername Yeah, but practically everyone's already seen it, it's not that interesting anymore :P

A username

True...

Guys, what do you think?

Recursive Co.

10:10 AM

Wow

Anyone want to invent the Nickroll? With Nickelback songs?

A username

Be honest, did it get you?

Recursive Co.

Now that got me. It would've been more obvious if it was a youtube link as I now routinely check such links in TNB

A username

I actually made that a long time ago

Recursive Co.

CMC: Given a string, output 'rickroll' if it is the video ID of the song and nothing otherwise.

(without the quotes)

A username

According to caird, the first time I used it, "That's very clever, but I didn't even look at the link"

Recursive Co.

10:14 AM

It what?

A username

(Accidentally pressed enter)

Recursive Co.

At first I thought you were going to admire tsh again as you always do.

@RecursiveCo. Hi

Bh!

Hi

10:18 AM

my challenge should be all correct now

@RecursiveCo. what sort of worked example did you want?

Recursive Co.

Just like your first example but with a longer explanation.

felipa

OK

@RecursiveCo. how is the worked example now?

Recursive Co.

Great!

felipa

now I just need some answers :)

a positive vote count!

Razetime

10:34 AM

@felipa i see you've been on this site for a long while!

felipa

@RecursiveCo. do you think you will write an answer?

@Razetime I am ooooold :)

codegolf.stackexchange.com/questions/10713/… was still my greatest challenge

Razetime

you may want to clarify that a bit more

since "as close as possible to a reference" isn't really a specification

felipa

it's from 7 years ago

I am more interested in today's challenge

Razetime

never too late to make a question better :)

felipa

@Razetime :) Please feel free to suggest constructive edits

Razetime

10:37 AM

I am considering answering it in K but i'm not sure whether I should add a computer player

so maybe have the following:

felipa

actually I liked codegolf.stackexchange.com/questions/10656/… too

the good old days

Razetime

two paddles, rectangular, must be on each side

point must be displayed for each player

and maybe remove the requirement for a computer player

that's it

ball must bounce at angle of 90 degrees to the direction it was moving in, maybe

or any other simplistic logic

that should work as a spec

@felipa btw where's this

ah the continuous knapsack

felipa

yes that one

if you can code breakout in half an hour then that is cool too :)

Razetime

sadly that is closed

popularity contests don't get much love nowadays

felipa

I know... all the best things get closed

Razetime

10:41 AM

haha

felipa

codegolf.stackexchange.com/questions/tagged/popularity-contest

Razetime

anyway this looks similar to the problem anush posted a little while ago

felipa

look at the number of answers to the recent closed questions!

@Razetime what does?

Razetime

non-greedy solution to fractional knapsaxck

@felipa your new question

felipa

@Razetime you mean in this chat? They didn't post a challenge I don't think

Razetime

10:42 AM

@felipa it was a CMC

felipa

@Razetime right. We communicated about this

Adám

@RecursiveCo. So we have to do image detection?

felipa

does anyone know a good way to add some words to the bottom of a video (on linux)?

Razetime

@Adám he's looking for the string dQw4w9WgXcQ, the youtube id

@felipa flowblade is a tiny app for that

felipa

@Razetime oh wow. Thanks I will look that up

Razetime

10:45 AM

it's pretty fast and works on most linuxes

felipa

it exists for ubuntu!

@Razetime how do I add text in flowblade?I have installed and run it

Razetime

@felipa video

felipa

@Razetime thanks

lyxal

11:22 AM

@Ausername I always check where the links go before clicking, and last time I checked stack exchange doesn't use surge lol

Also, the link doesn't look like the usual answer link format

@Ausername I don't know how it actually works - I just download the data and press run

wasif

11:59 AM

@lyxal where do you run the corpus

I mean how can I run the corpus myself locally

pxeger

12:20 PM

@cairdcoinheringaahing he's not the messiah!

I have discovered my new favourite set of Unicode characters: 🯰🯱🯲🯳🯴🯵🯶🯷🯸🯹

lyxal

@wasif I'll put it into a gist - I saved it while it was still available

pxeger

Yeah, why did 2x-1 delete their account?

lyxal

that's one of life's great mysteries

user

stasoids back!

lyxal

@pxeger why they delete their account has been an unanswered question for around a year now

pxeger

12:26 PM

hmm

lyxal

@wasif gist.github.com/Lyxal/7a8d3b1f505f512ce0191312e9a45cba

@pxeger in other words, it's not the first time this has happened

user

@lyxal Any theories?

lyxal

@user all theories I originally had were discredited due to the circumstances not fitting the expected pattern

so no

Anyone know how to make favicons work?

because it's refusing to work

pxeger

shouldiblamecaching.com

lyxal

still not working

go to the vyxal interpreter and tell me what you see as a favicon.

@pxeger ^

pxeger

12:30 PM

nuffink

lyxal

what does the caching site say?

pxeger

favicon.ico gives a 404

@lyxal ?

lyxal

@pxeger shouldiblamecaching

is this not how to favicon? <link rel="shortcut icon" type="image/jpg" href="https://github.com/Lyxal/Vyxal/blob/master/templates/favicon.png">

pxeger

@lyxal it says "It's not working? Should I blame caching? YES. [advice may be invalid due to caching]"

lyxal

@pxeger huh. intersting

pxeger

12:32 PM

I think it has to be .ico

And image/jpg does not match the .png extension

And https://github.com/Lyxal/Vyxal/blob/master/templates/favicon.png is not the image URL itself; it's the GitHub page for the file

Try https://github.com/Lyxal/Vyxal/raw/master/templates/favicon.png

lyxal

yes

that works

as you can tell i'm very bad with html

pxeger

why didn't you just google it btw lol

111

Q: What is the best practice for creating a favicon on a web site?

Question What is the best practice for creating a favicon on a web site? and is an .ico file with both 16x16 and 32x32 images better than a .png file with 16x16 only? Could the right method preferred today not be working in reasonably old browsers? Method 1 Placing a file named favicon.ico i...

html favicon

Transcript for