The Nineteenth Byte

hyper-neutrino

5:00 PM

@AlanBagel added

DLosc

@hyper-neutrino What the heck. That's incredible.

hyper-neutrino

yeah since my molding solution didn't work i just decided to go for some super cursed mod/base magic

unfortunately, it doesn't even beat caird's solution which uses some chaining magic i haven't fully understood yet :D

caird coinheringaahing

Behold my chaining powers :P

I added an explanation btw :P

@hyper-neutrino Uh oh, does this mean you're able to use ƙ now? This does not bode well for me in our golfing battles :P

hyper-neutrino

:D

DLosc

@pxeger When you said your solution was "improvable," my brain for whatever reason translated the word as "cannot be proved." :P

pxeger

5:04 PM

lol

caird coinheringaahing

According to Godel, it's possible it could be :P

@hyper-neutrino I feel convinced there's a shorter way to check if n has exactly one bit set, but I can't find it :/

pxeger

@cairdcoinheringaahing x & (x - 1) == 0?

Redwolf Programs

Can someone copy the code from this tio link?

DLosc

x=>(g=n=>x+x?[x.splice(0,++n).sort((w,z)=>w-z),...g(n%3)]:x)``

pxeger

yep, that's what I see too ^

Alan Bagel

5:13 PM

x=>(g=n=>x+x?[x.splice(0,++n).sort((w,z)=>w-z),...g(n%3)]:x)

Redwolf Programs

Thanks!

hyper-neutrino

@pxeger that doesn't work here because i have 0 in my list as well

but that's a nice trick to remember, thanks

Redwolf Programs

x+x to determine if an array is empty is a genius trick I just learned from Arnauld

hyper-neutrino

that's kinda cursed ngl

Redwolf Programs

It definitely is

Alan Bagel

5:14 PM

@RedwolfPrograms if seq: in Python works too

Redwolf Programs

Fun fact: +[21] works how you'd expect in JS, and is 21. Any guesses on why it works?

Alan Bagel

@RedwolfPrograms [21] => 21???

Redwolf Programs

Nope, 21 to the comma-separated string "21", which is then cast to a number

So +[1, 2] is NaN, because it's the same as +"1,2"

Alan Bagel

js is weird

DLosc

@AlanBagel Let's talk about... JavaScript

Alan Bagel

5:22 PM

@DLosc wat

caird coinheringaahing

8 bytes :D

pxeger

nice!

Redwolf Programs

I get the feeling Arnauld's working on some sort of 50-something-byte answer lol

hyper-neutrino

@cairdcoinheringaahing ah, nice

caird coinheringaahing

I kinda borrowed your approach of generating [1,2,2,3,3,3,4,...] to use Ṣƙ :P

@cairdcoinheringaahing Jelly, 7 bytes 3Rṁx@RS

hyper-neutrino

5:30 PM

@cairdcoinheringaahing i have been outplayed by my own strat :P

caird coinheringaahing

If it helps, I still don't fully understand ƙ in a general sense, just in this specific one :P

And I only understand it here because of your answer :P

hyper-neutrino

lol

I know how it works in the monadic case

caird coinheringaahing

I thought there was only a monadic case, there's a dyadic case?

hyper-neutrino

oh nvm key doesn't work on dyads

basically how key works is

it matches the elements on the left and right 1:1 and then groups by equality on the left side

so [1, 2, 3, 1, 2, 1] ?key [a, b, c, d, e, f] would group it as [a, d, f], [b, e], [c]

and then it applies the monad to each of those groups

caird coinheringaahing

That seems super specific

It's based on a J builtin, isn't it

hyper-neutrino

5:35 PM

lol, wouldn't be surprising

yeah it is quite niche

caird coinheringaahing

@cairdcoinheringaahing I'm definitely going to finish the blog post over the weekend, instead of revising for my exams, I promise :P

pxeger

that sounds like kind of a bad idea lol

caird coinheringaahing

5+5=11, 6/3=1, I've got this :P

Tho, I did a practice paper yesterday, and it seems as though my biggest issue is the same as my entire mathematical career: stupid tiny mistakes early on that make the rest of the answer entirely wrong

Fun fact: anagol is exactly 4 years and 2 days older than CGCC

DLosc

@cairdcoinheringaahing SAME. So relatable.

caird coinheringaahing

6:35 PM

I honestly don't know how anyone uses SEDE to query SO. I'm trying to find posts that use TIO, and it times out no matter what I do to try to restrict the search query :/

Alan Bagel

Why does [..."abcdefghijklmnopqrstuvwxyz"] raise a unexpected string error in js?

Redwolf Programs

Old version

Alan Bagel

@RedwolfPrograms I'm testing it in the browser

Redwolf Programs

Oh huh

Works for me

What browser?

Alan Bagel

@RedwolfPrograms Oh wait now it works.

Redwolf Programs

6:38 PM

lol

Alan Bagel

I copy pasted some two line code from tio.

Hmm why does `s=0
[..."abcdefghijklmnopqrstuvwxyz"].forEach(e=>console.log(e))` raise a unexpected string error in js?

Redwolf Programs

It's detecting that as 0[..."abc"]...as in, finding the ..."abc"th item in 0

You can fix that with a semicolon

Alan Bagel

@RedwolfPrograms ok thanks

Redwolf Programs

Using JS without semicolons can do some weird stuff sometimes

Alan Bagel

Why does " "*2+"a" result in 0a?

Redwolf Programs

6:43 PM

Because " " is 0 when cast to a number

And * casts both its arguments to numbers

It doesn't have a string repetition overload like Python

Alan Bagel

@RedwolfPrograms Oh I forgot to use .repeat(). I'm too used to Python.

Is it possible to do something and increment a variable in a lambda?

Redwolf Programs

Does +:= exist? Or something with similar syntax?

(If we're talking about python)

Alan Bagel

@RedwolfPrograms No, but x:=x+1 exists.

I guess I'll use a `function(){}` then. Ended up with ```s=0;
[..."abcdefghijklmnopqrstuvwxyz"].forEach(function(e){console.log(" ".repeat(s)+e);s+=1})```

Redwolf Programs

s++

Alan Bagel

@RedwolfPrograms I may have used way too much Python...

Redwolf Programs

6:52 PM

And e=>(console.log(...),s++) is much shorter than a function

caird coinheringaahing

I believe e=>console.log(" ".repeat(s++)+e) should work, right?

Or am I misremembering how s++ works?

Redwolf Programs

Yep

I didn't look at where s was actually used lol

Also, map is much shorter than forEach

You also don't need the newline after s=0 if you're using ;

And actually, s is unnecessary anyway

forEach and map provide the index as a second argument

So (e,s)=>console.log(...) would work and doesn't require the s=0 or s++

@AlanBagel ^

Alan Bagel

[..."abcdefghijklmnopqrstuvwxyz"].map((e,s)=>console.log(" ".repeat(s)+e))

Pretty golfed.

Is there a 'fancy' and shorter way of saying abcdefg...

Redwolf Programs

Yes

[...Array(26)].map((_,i)=>console.log(" ".repeat(i)+(i+10).toString(36)))

(i+10).toString(36) is the short way of getting the nth letter of the alphabet

(f=i=>i<26&&console.log(" ".repeat(i)+(i+10).toString(36))+f(i+1))(0) is shorter I think, using recursion

Alan Bagel

7:08 PM

Hmm, It looks like both are longer.

Oh wait, I saved one byte!

What does the (0) do?

Redwolf Programs

It's needed to run f

It also initializes i to 0

Alan Bagel

Why zero?

Why not 1?

Redwolf Programs

0 corresponds to a

Alan Bagel

@RedwolfPrograms ohhh

emanresu A

7:23 PM

for(i=0;++i<26)console.log(" ".repeat(i)+(i+10).toString(36))) might be shorter

Redwolf Programs

You're missing a ; in the loop

pxeger

cs.cmu.edu/~sef/sefSmiley.htm

emanresu A

@PyGamer0 Implementing a specific algorithm is generally off topic as you can't tell whether a solution uses that or something else.

@RedwolfPrograms So I am

Redwolf Programs

But yeah, the for loop is definitely shorter

I'm not used to golfing full programs lol

pxeger

CMM: is it ok to clarify and then repost old challenges which were closed for being unclear?

Alan Bagel

7:34 PM

@pxeger I think so.

caird coinheringaahing

@pxeger I'd suggest asking the OP of the question, and use similar guidelines to abandoned Sandbox proposals (wait a week for a response before doing so). Either way, you should definitely credit the original author for the challenge idea

emanresu A

@NewPosts I have this, can someone who's good at jelly make this tie caird?

Alan Bagel

Not me.

hyper-neutrino

@emanresuA the trailing empty list is invalid

caird coinheringaahing

1) That doesn't work as it has a trailing []. You need Ṗ to fix that. 2) That was essentially my first version :P

hyper-neutrino

7:42 PM

removing that makes it literally caird's initial solution :p

caird coinheringaahing

I had the chain separator after the R, but basically, yeah :P

Sandbox Posts

0

A: Sandbox for Proposed Challenges

Can I obtain this Minecraft item? Given a list of items I have access to, determine if I can obtain a certain amount of some other item via crafting, mining, trading, and some other actions. Actions This is a list of all actions which may be performed, and what items they involve Crafting: Log ×...

emanresu A

Oh :P

Neil

8:33 PM

@emanresuA for(i=9;++i<36;)console.log(" ".repeat(i-10)+i.toString(36))

pxeger

Fredrik Lundh (owner of effbot.org) has died: mail.python.org/archives/list/python-dev@python.org/thread/…

DLosc

@NewPosts Not too bad in HBL, even with no group or unfold functions yet.

Redwolf Programs

8:55 PM

Idea: A programming language that uses endings on things to determine what operators apply to, like latin does

emanresu A

@Neil Ooh, nice

pxeger

@RedwolfPrograms that's actually an awesome idea

so like nilads have an ending which determines whether they're about to be used monadically, as a left argument, or as a right argument

and functions have an ending which determines the same but for their return values?

@RedwolfPrograms (are you bored in Latin class again?)

Redwolf Programs

(yes)

I might as well just post my whole schedule here lol

Alan Bagel

9:28 PM

@RedwolfPrograms I think it's a good idea.

lyxal

9:48 PM

@SandboxPosts Vyxal, 1 byte: 1 explanation: just use /give

Fmbalbuena

6

Q: Tips for golfing in Chef

What general tips do you have for golfing in Chef? I'm looking for ideas which can be applied to code-golf problems and which are also at least somewhat specific to Chef (e.g. "remove unnecessary whitespace" is not an answer). Please post one tip per answer.

Someone answer to get 50 rep

^^^^^^^^^^^^^^^^^^^^

@Fmbalbuena CMFF: This is the 2009988th message in TNB

Redwolf Programs

No it isn't

> 1987047

Where'd you get that number?

Fmbalbuena

@RedwolfPrograms A conversation can only have up to 400 messages; you have selected 2009995.

@RedwolfPrograms Where'd you get that number?

Redwolf Programs

It says on the info page for the room

@Fmbalbuena That probably counts something like feeds or moved messages

Fmbalbuena

@RedwolfPrograms Yeah I count feeds and moved messages.

Redwolf Programs

9:57 PM

I also downloaded a list of every message in the room not long ago and it was the same as the indicator on the info page

Fmbalbuena

@RedwolfPrograms 50 rep bounty?

Sandbox Posts

10:40 PM

0

A: Sandbox for Proposed Challenges

Converge to a number Your challenge is to, given a number n, count up to each digit of it, giving the effect of converging on it. Basically, count up to the first digit by its place value (\$⌊\log_{10}\left(x\right)⌋\$). Then do the same for each subsequent digit, but with the values of the previ...

emanresu A

@Bubbler Chance is (10/16) ^ 11 = .005 = 1 in 2000, so quite rare but reasonably possible

There's probably one in Vyxal somewhere

hyper-neutrino

22 hours ago, by lyxal

@Bubbler I see your 11 and raise you a 12

Redwolf Programs

11:40 PM

@emanresuA I already did the stats and posted them here lol

Except for some reason the tool I was using got it wrong

Oh it's because I clicked the wrong distribution lol

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