The Nineteenth Byte

Mayube

18:01

@pxeger that doesn't flatten it

pxeger

ok, a.flatMap(x=>a.map(y=>[x,y])) :Þ

Mayube

TIL js has flatMap

afaik list comprehension is the only 1-line way to flatten a list in python

Redwolf Programs

@Mayube map is shorter than a for loop though

Array compositions are just a longer map

pxeger

@Mayube sum(list_of_lists,[])

Mayube

@RedwolfPrograms not in python :P

Redwolf Programs

18:04

Uh oh I just made a networking-related infinite loop lol

I SSHed to my server and opened a screen session which displayed the total number of packets sent over SSH. So it'd count up, then send another packet to show that it'd counted up, and so on, making a loop :p

pxeger

lol

Mayube

List comprehension is much shorter in python, partly because of the overhead of typing lambda for every lambda :P

pxeger

try plugging a switch into itself with an ethernet cable, that's a much more old-fashioned networking infinite loop

Mayube

AFAIK most decent new switches these days will detect that loop

Redwolf Programs

@RedwolfPrograms It's actually a pretty good way to test latency lol

pxeger

18:07

> old-fashioned

Mayube

and by "AFAIK" I mean "according to my networking undergrad housemate" :P

Redwolf Programs

If networking was a small field, in order to get to know people, would you need to network? :p

Mayube

networking's an IT field, good luck getting them to talk to anyone :P

Aaroneous Miller

18:32

@Mayube I feel personally attacked :p

emanresu A

@NewBountiesWithNoDeadlines asm2bf go brr

@cairdcoinheringaahing Yep.

caird coinheringaahing

@emanresuA œṣF works

You might need œṣF¥ if you need it as a single link

emanresu A

ok

caird coinheringaahing

18:53

@Mayube Cartesian product?

Mayube

19:06

I guess

emanresu A

o/

Mayube

\o

Neil

19:37

@pxeger yeah but it could do filtering and mapping at the same time, which was neat. I think some of my answers used it

Fmbalbuena

@lyxal can you change the code to fixed code of @AaroneousMiller

still 70 - 1 bytes

Seggan

20:03

@pxeger in regard to your comments on my Zsh answer, I have a few things to point out. 1st, the ! operator has a higher precedence than %, so you need not enclose !n%i in parens. 2nd, my solution works perfectly for many test cases, while the very last one you gave does not even run

pxeger

@Seggan are you definitely putting the input in the command line arguments and not stdin? because I changed that

@Seggan also I think I misunderstood the !n%i part, and I was wrong that it didn't work, so sorry

Ok, I've worked out it's the (($#e+$#f<$#1&&e*f==$1)) part that broke it

Fmbalbuena

@pxeger What is your origin of your name?

pxeger

I'm not really sure why, but everything else still works

@pxeger (this is why I thought yours didn't work, actually - I forgot to change the input method!)

Here's a fully working golfed one: ato.pxeger.com/…

Sandbox Posts

0

A: Sandbox for Proposed Challenges

Escape the maze code-golf Here is a random maze: ##### #M.#E #.##. #.##. #.... ##### Here M is the starting point and E is the endpoint. # is a maze wall and . is a path. Now we can get out of this maze by following the sequence sssdddwww. (s is dow, d is right, w is up, a is left.) Your challen...

DLosc

So close!

Seggan

20:18

@pxeger thanks for the tips :) ill make sure to use them next time. i was litterally coding in bash with some zsh shortcuts ;)

pxeger

@DLosc close to what?

DLosc

Tying the best score

pxeger

oh, to beating 05ab1e?

@DLosc yes

@Seggan :)

why did those messages get combined? Am I going insane?

Seggan

no, theyre separate

pxeger

@Seggan after I edited to fix it, yes...

look at chat.stackexchange.com/messages/59640847/history

Seggan

20:21

hmm, you solution fails the test case of 40, its not digit small, but your version says it is

pxeger

@Seggan ah, this time I'm definitely right: yours gives the same output for 40

Seggan

mine gives 2 0s, yous gives nothing

pxeger

works for me: ato.pxeger.com/…

Seggan

never mind, i was using the wrong version. sorry for the mixup

pxeger

haha no problem

it's not like I would ever make a mixup using the wrong version... ;-)

Mayube

20:33

as somebody who uses Zsh as my goto shell when I'm on linux, I should probably learn Zsh scripting

pxeger

@Mayube I'm happy to help with anything!

I want more regular Zsh users!

Seggan

wait, you bountied, zsh, right?

pxeger

yep

PyGamer0

20:46

@Mayube i am in India

currently north india

news: the train has been delayed by 5 hours in total

pxeger

that doesn't sound very fun

Redwolf Programs

SOCK² is only working for a few minutes at a time, which is really odd.

pxeger

SOCK² is something you made, right? How does it work?

Is it what it sounds like - a SOCKS proxy nested inside a SOCKS proxy?

Redwolf Programs

socks5 over a websocket, with some fancy stuff on top

It's kinda jankily patched together, so I wouldn't be surprised if I should be buffering something somewhere or something

pxeger

I'd guess the problem is the network dropping the connection after a few minutes?

Redwolf Programs

20:57

No clue

I'm going to do some testing at home, to see if it's sock² itself or the school wifi doing something odd

Mayube

21:35

How do I downvote a comment

Redwolf Programs

Ooh, my AoC id has four consecutive identical digits

#988880

Mayube

CMQ: Should all non-zero numbers be truthy in my language, or just positive numbers?

Redwolf Programs

I'm actually considering making 0 truthy in an upcoming language

And only ..-1 is falsy

Aaroneous Miller

@Mayube All numbers that do not contain a zero are truthy.

5

Mayube

function isTruthy(n) { return !(n==0||n.toString().split("").map(c=>isTruthy(parseInt(c))).reduce((a,b)=>a&&b));}

Redwolf Programs

21:45

x=>[...x+""].every(z=>z)

Mayube

numbers are truthy only if divisible by pi

Redwolf Programs

@Mayube Why .map(...).reduce((a,b)=>a&&b)? That's a really long way to say .every(...) :p

And .toString().split("") is so ungolfy I wouldn't even use it in production code :p

@RedwolfPrograms (Note this should be +z not z)

Mayube

@RedwolfPrograms wtf that's existed since 2011!?!?

Redwolf Programs

Oh wow, didn't know it was pre-ES6

Or, preS6 lol

Mayube

> every was added to the ECMA-262 standard in the 5th edition

Redwolf Programs

21:48

@RedwolfPrograms Golfy™

Mayube

Look man, I'm a C# programmer by day, and used to be a PHP programmer by day. The most exposure I've had to "modern" JS is TS :P

Redwolf Programs

I guess that explains the worrying lack of type system abuse in that code lol

Although I'm kinda confused as to why you used recursion there

Mayube

cos recursion is fun

Redwolf Programs

f=x=>x%10&&(x>9?f(x/10|0):1)

git gud :p

f=x=>+x&&[...x+""].every(f) is shorter actually, and uses your method

(why am i doing this)

CMQ: What's the name of an operation that would take any number of arrays, and return every way to choose one item from each? E.g., [1, 2], [0, 4], [1, 2, 8] to [1, 0, 1], [1, 0, 2], [1, 0, 8], [1, 4, 1], [1, 4, 2] and so on

Mayube

@RedwolfPrograms doesn't work very well though, base case is a bit wonky

Redwolf Programs

21:58

@RedwolfPrograms All the way up to [2, 4, 8]

Mayube

Also f=x=>!/0/.test(x+"") is shorter

Redwolf Programs

@Mayube Wdym? It's just if x is 0, return 0

Mayube

@RedwolfPrograms and what happens if x is 2?

Redwolf Programs

It's truthy, so it returns [...x+""].every(f)

Mayube

it calls ["2"].every(f), which calls ["2"].every(f)...

Redwolf Programs

21:59

@RedwolfPrograms ...oh

Wait, doesn't your original do that too?

Mayube

probably lol

Redwolf Programs

I was just golfing your approach :p

Mayube

well regex is shorter anyway

Fmbalbuena

22:18

@lyxal edit the explanations of how bucal code work?

lyxal

Hey @RedwolfPrograms there seems to be a problem with your SOCK²

It's just sitting there doing nothing

@Fmbalbuena maybe later. I'd need time to see exactly what's changed

Redwolf Programs

22:55

@Mayube You know .test casts to string right, you don't need the +""

But yeah, regex wins, and even more so with that :/

caird coinheringaahing

23:22

Can we get a couple more VTDs on this?

lyxal

23:47

woah I just managed to keyboard interrupt python on a comment

>>> Traceback (most recent call last):
  File "...Python\Python39\lib\runpy.py", line 197, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "...Python\Python39\lib\runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "...vyxal\vyxal\vyxal.py", line 48, in <module>
    # Vyxal REPL ftw
KeyboardInterrupt

last time I checked, you're not really supposed to be able to KeyboardInterrupt on something that's supposed to be ignored

Sandbox Posts

0

A: Sandbox for Proposed Challenges

Solve the halting problem for Minyrinth code-golf decision-problem interpreter halting-problem Introduction Minyrinth is the stripped-down version of Labyrinth. It has the same routing semantics as Labyrinth but only four non-wall commands, and only one register (that can hold unbounded signed in...

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