The Nineteenth Byte

Redwolf Programs

3:23 PM

Morning!

Sorry I'm late, got up a bit later than I expected and had to mow

user

I forgive you, but you'll have to pay us all extra cookies today

Redwolf Programs

Can I make up for it with some insurance?

I'll bundle home and auto

user

Sure, why not?

caird coinheringaahing

4 hours ago, by caird coinheringaahing

I think you missed one @NewPosts (cc @RedwolfPrograms):

Might want to check what happened here @RedwolfPrograms

Redwolf Programs

Will do

Today's Tuesday so it shouldn't have been due to a reboot

Oh frick, I left a testing program open and wrote multiple gigabytes of the string Something... to a screen session lol

(node:4964) UnhandledPromiseRejectionWarning: FetchError: request to api.stackexchange.com/2.2/questions/…(( failed, reason: socket hang up

Doesn't look like anything I could control, but I'll add some error handling to make it retry if this happens in the future

hyper-neutrino

3:30 PM

brilliant

Redwolf Programs

Wrong room, frick

← 3 messages moved from BMG Drafts

hyper-neutrino

beat me to it

that's gotta be pretty rare

user

I don't see a steak

@lyxal What is this

hyper-neutrino

@user it's chicken

user

Eww, rare chicken

Redwolf Programs

3:31 PM

You ruin chicken by cooking it well done. You lose all the flavor and texture.

user

You can get salmonella from undercooking it, i think

Redwolf Programs

Nonsense

hyper-neutrino

most messages moved into TNB have been by Adám from APL :P

user

@RedwolfPrograms Overcooking it does that

@hyper-neutrino Apples are always eaten rare

Redwolf Programs

(I'm joking, don't over or under cook chicken :p)

user

3:32 PM

Never cook an apple, it doesn't end well

hyper-neutrino

@user I like mine medium-well

user

@RedwolfPrograms No you're not

Redwolf Programs

I'm nOt jOkInG I'm hYpEr-nEuTrInO

user

@hyper-neutrino ಠ_ಠ

Redwolf Programs

Wait wrong person lol

hyper-neutrino

3:32 PM

ಠ_ಠ

user

@RedwolfPrograms Ha! Found the impostor! Red's looking very sus right now

Redwolf Programs

i've moved to canada and stopped capitalizing i

user

@RedwolfPrograms Wait did you just forget who you are?

Redwolf Programs

No, I'm just used to it being HN who gets lyxal'd for some reason

user

@RedwolfPrograms Huh, TIL Canadian keyboards don't have a Shift or CapsLock key

hyper-neutrino

3:33 PM

Morning everyone, I just moved to Texas

user

@RedwolfPrograms Because HN keeps forgetting that they're not supposed to let people know they and JoKing are the same entity

John Dvorak

:wave:

hyper-neutrino

@JohnDvorak :wave:

user

@hyper-neutrino Don't shoot yourself in the foot

hyper-neutrino

@user no worries, I've already been shot thrice

John Dvorak

3:34 PM

I'm curious, why did you move?

hyper-neutrino

@JohnDvorak uh, you walked in in the middle of a rather strange joke

if you know about the whole "you're not joking, you're <username>" thing that lyxal thinks is funny

John Dvorak

sorry

hyper-neutrino

redwolf said they were joking

user

@hyper-neutrino Anytime anyone walks into TNB, it's going to be in the middle of a rather strange conversation

hyper-neutrino

and then "corrected" that to:

2 mins ago, by Redwolf Programs

I'm nOt jOkInG I'm hYpEr-nEuTrInO

2 mins ago, by Redwolf Programs

i've moved to canada and stopped capitalizing i

so i was continuing ^

Redwolf Programs

3:37 PM

There've been a lot of late answers reviews recently...

(Not complaining though :p)

This challenge has a controversialness of more than 10 according to Question Reception

in BMG Drafts, 7 secs ago, by Redwolf Programs

If anyone has any more ideas for drafts, we'll probably start voting in a few minutes.

hyper-neutrino

hey there @rene! o/

rene

3:52 PM

Hey! There was a party here, so I'm told

hyper-neutrino

Yep! Just waiting for more people to show up :P

Redwolf Programs

Voting on drafts is starting now.

Just star any you like.

ophact

Not exactly a party... although you could call it that

20 seconds

Redwolf Programs

I'll post the thing

Welcome to the third Biweekly Mini Golf! During this event, we'll post some CMCs (Chat Mini Challenges) for you all to solve. The first one will be posted at the start, and additional ones will be added every 5 to 10 minutes. Good luck!

CMC: Palindromise: given a string S output the shortest palindromic string that starts with S

hyper-neutrino

@RedwolfPrograms Jelly, 8 bytes: ;ⱮUƤUƑƇḢ

rak1507

4:03 PM

@hyper-neutrino explanation please :P

hyper-neutrino

;ⱮUƤUƑƇḢ  Main Link
 Ɱ        For each
   Ƥ      Prefix
  U       Reversed,
;         Append to the original string
      Ƈ   Filter to keep elements that are
     Ƒ    The same when
    U     Reversed
       Ḣ  And get the first one

Redwolf Programs

Javascript, 87 bytes: s=>[...s,0].map((_,i)=>s+(r=x=>[...x].reverse().join``)(s.slice(0,i))).find(t=>t==r(t))

user

> doggod

hyper-neutrino

oh, my solution doesn't account for palindromes correctly, oops

user

All hail our canine overlords!

Redwolf Programs

4:08 PM

My test cases were cat, dogg, and ada, I'd recommend those (or similar)

hyper-neutrino

In that case, 10 bytes: ;ⱮṖU$ƤUƑƇḢ

same thing, but ṖU$ pops the last element and then reverses, instead of just reversing, so it still maps over prefixes

Wasif

hello everyone

Redwolf Programs

Hi!

hyper-neutrino

you're just in time for the first challenge

Wasif

@RedwolfPrograms oh is the mini golf running

Redwolf Programs

4:09 PM

Yep!

Wasif

I'm in time

Redwolf Programs

Just started under 10m ago

hyper-neutrino

my reputation is no longer a multiple of 10 :( oh well, i could fix it, but i'm not gonna bother

Redwolf Programs

CMC: Given a list of strings, output the sorted version (alphabetically) based on last letter: ["abc", "deb", "fgh", "jiz", "efy"] -> ["deb", "abc", "fgh", "efy", "jiz"]. Must be in ascending order, and the strings will always match /[a-z]/g.

user

@hyper-neutrino Accept an answer (preferably one of mine ;) )

hyper-neutrino

4:11 PM

@user well that's what i meant by "i could fix it"

@RedwolfPrograms Jelly, 2 bytes: UÞ

literally "sort with key: reversed"

ṚÞ works as well

Aaron Miller

Vyxal, 3 bytes:⁽tṡ

hyper-neutrino

this is why I say postfix operators would be good for Vyxal :p

Wasif

@RedwolfPrograms Python FTW!!! 37 bytes: Try it online!

Redwolf Programs

Javascript, 45 bytes: d=>d.sort((a,b)=>a.slice(-1)<b.slice(-1)?0:1)

Wasif

lambda z:sorted(z,key=lambda x:x[-1])

hyper-neutrino

4:13 PM

how is "az", "bz" sorted?

Redwolf Programs

Doesn't matter

hyper-neutrino

okay

Redwolf Programs

in BMG Drafts, 12 mins ago, by ophact

And if the last letters are the same, you can sort in whatever order.

Wasif

sorry double posted net problem

hyper-neutrino

unfortunately "sort by tail" would not work because tail modifies. but sort by reverse works

Aaron Miller

4:14 PM

Wait, no. 2 bytes: µt

user

@RedwolfPrograms Scala, 16 bytes: _.sortBy(_.last)

Redwolf Programs

Scala is surprisingly golfy

Scala attacks

The library's nice

Python is hopeless

4:14 PM

@RedwolfPrograms Vim, 15 keystrokes: :sort /.*\ze./<cr>

hyper-neutrino

UṢU should also work in jelly (ofc not as short tho) - reverse each, sort, reverse each

rak1507

@hyper-neutrino sort under reverse each

Wasif

Can we still answer the first CMC?

Redwolf Programs

Sure, go ahead

hyper-neutrino

@rak1507 already did

rak1507

4:16 PM

yea, I'm just saying what it would be with under

which jelly should totally have

DJMcMayhem

err, 14: :sort/.*\ze./<cr>

hyper-neutrino

4 mins ago, by hyper-neutrino

@RedwolfPrograms Jelly, 2 bytes: UÞ

you mean ^?

Redwolf Programs

I'll go ahead and post caird's quintuple polyglot one since I expect it'll take a while if anyone's planning on attempting it

CMC: Polyglot that outputs 5 different characters in 5 different languages

user

@RedwolfPrograms Scala REPL, Python 2, Python 3, Ruby, and probably a few more, 14 bytes: print("abcde")

Redwolf Programs

I don't think that's what was meant

@cairdcoinheringaahing Are snippets allowed for the polyglots?

Like "+" for JS?

rak1507

4:19 PM

it needs to print character 1 in language 1, character 2 in language 2, etc

user

Oh lol

I'm dumb, sorry

Redwolf Programs

If so, "+[.,].","x" is a polyglot with three languages (BF, dotcomma, JS), not sure which to try to add now

Wasif

Powershell 2,3,4,5,6: $psversiontable.psversion.major, 31 bytes

Redwolf Programs

That's boring :p

Wasif

Try it online!

looking at the version is probably allowed tho boring

hyper-neutrino

4:20 PM

must it output exactly one character?

user

@RedwolfPrograms Jelly, since it only runs the last line?

hyper-neutrino

and does the program have to terminate without error

Redwolf Programs

@user Oh, good idea.

pxeger

@RedwolfPrograms C, Python, Ruby, Bash, Zsh: Try it online!

Redwolf Programs

I forgot how strings work in jelly, what's the one for a single character?

hyper-neutrino

4:22 PM

@RedwolfPrograms ”x

be careful with encoding issues with other languages

user

@pxeger Nice!

Redwolf Programs

What would # do in Jelly?

Wasif

@pxeger oo you code too fast

this challenge will help y'all

pxeger

@Wasif I already had this to be fair

Redwolf Programs

print("+[.,]."&&"x")
//”x

This breaks Jelly :/

I guess I'll have to try a different golfing language maybe?

hyper-neutrino

4:25 PM

jelly is possible but you need to understand a lot of quicks to solve the "pop from empty list" errors :P

Redwolf Programs

print("+[.,]."&&"x")
#‘x

This works in Ash

In theory

user

Husk only runs the first line. Try something in the form
"<char>"
js code that's also valid husk?

Redwolf Programs

So that's four now

user

@RedwolfPrograms ಠ_ಠ

Redwolf Programs

Should I post the next CMC now?

ophact

4:26 PM

Sure

Wasif

@RedwolfPrograms of course

Redwolf Programs

CMC: Sort a list of numbers so that no triplet of items is consistently sorted min to max or max to min. [0, 1, 2, 4, 8, 10] could become [10, 2, 4, 1, 8, 0]

ophact

Does it have to be deterministic?

hyper-neutrino

a=2//2;a=int(1/2*2);import sys;alert=lambda x:sys.stdout.write(str(x))
alert(a)
3

Redwolf Programs

@ophact No, and I was just thinking the exact same thing lol

hyper-neutrino

4:28 PM

outputs 0 in python 2, 1 in python 3, 2 in JS, 3 in Jelly, and \x01 in brainflak

Redwolf Programs

Nice!

hyper-neutrino

er, that's wrong

DJMcMayhem

@RedwolfPrograms What about impossible inputs? (10, 3, 3, 3)

hyper-neutrino

wait no it isn't

Redwolf Programs

@DJMcMayhem Ignore those I guess

hyper-neutrino

4:29 PM

i accidentally made it a brainflak polyglot because of the (()) on the end of the first line, LOL

i initially was adding that myself because working across 5 TIO tabs, my code got a bit mixed up

@RedwolfPrograms can we assume that the input is sorted?

Redwolf Programs

I'd originally said no, but I guess that'd be a bit more interesting.

DJMcMayhem

I hope not

Redwolf Programs

No, you can't

DJMcMayhem

That doesn't seem like a reasonable assumption imo

hyper-neutrino

alright

Ṣs2UF in jelly should work then; sort it, reverse each slice of size two, and flatten

actually nvm that won't work if the input has like 8 3s in a row

ṢŒHż/UF should work; sort, split into two halves, zip the first with the reverse of the second, and flatten

rak1507

4:32 PM

that's what I was thinking too although I'm not convinced it'll work

it should do though

Aaron Miller

@RedwolfPrograms Vyxal, Red, BF, Befunge-93, Python 1: Try it online!

ophact

Python 1?

How does that work

hyper-neutrino

I think Dennis added that upon my request because I needed more languages for One OEIS After Another :P

or maybe it was there beforehand, I can't remember

rak1507

@AaronMiller it doesn't print anything in python 1

hyper-neutrino

also doesn't seem to print in befunge-93 either lol but idk how that language works

ophact

4:38 PM

125 bytes in python 3

pxeger

@ophact markdown doesn't work in multiline messages

Aaron Miller

Oops, had to swap the @and the '. Fixed.

ophact

Edited.

Aaron Miller

@hyper-neutrino It prints a tab (0x09)

hyper-neutrino

oh :/

Redwolf Programs

4:39 PM

143 bytes just to make a list of the orderings :/

ophact

what language?

Redwolf Programs

JS

Found a few golfs though

Wait no now it's broken

Wasif

Python 3.3=0, Python 3.5=1, Python 3.6=2, Python 3.8=3, Python 3.9=4, 143 bytes,

lambda:exec("\n".join(['try:exec("'+x+'");o='+str(y)+"\nexcept:0"for x,y in zip("u'' b''%() f'' (a:=0) {}|{}".split(),range(5))])+"\nprint(o)")

Polygot challenge

Redwolf Programs

CMC: Given a string of even length L, output a balanced string of parentheses of length L

Wasif

I am going for dinner now :-(

user

4:43 PM

@RedwolfPrograms Can we just do () l/2 times, or do they have to be nested?

*L/2

rak1507

@Wasif cya

ophact

which parentheses

hyper-neutrino

@RedwolfPrograms jelly, 5 bytes: Hx@Ø(

does (((...)))

Hẋ@Ø( does ()()...()()

Redwolf Programs

It's caird's CMC so I'm not sure, but I'd guess any balanced string of parentheses is fine

DJMcMayhem

@RedwolfPrograms Wait what? Just literally any string of length L?

hyper-neutrino

4:45 PM

wait we're given a string of length L, not L?

DJMcMayhem

V 6 bytes I guess: Ó../()

Redwolf Programs

HN's extension of it seems much more interesting

hyper-neutrino

LHẋ@Ø( then I guess

or LHx@Ø(

Aaron Miller

Vyxal, 5 bytes: L½k(*

DJMcMayhem

brain-flak, 44 bytes: {{}{}<>(((((()()()()()){}){}){}())[()])<>}<>

ophact

4:48 PM

The right tool for the job ;) a challenge about brackets solved in a language reliant on brackets

user

@RedwolfPrograms Scala, 14 bytes: l=>"()"*(l/2). Can't use underscores here :(

Redwolf Programs

JS: x=>"()".repeat(x.length/2)

Aaron Miller

Red, 36 bytes: prin append/dup"""()"(length? s) / 2

hyper-neutrino

python 2: lambda x:len(x)/2*"()"

Redwolf Programs

You can sort it if you want them to be nested

hyper-neutrino

4:50 PM

lambda x:len(x)/2*"("+len(x)/2*")" if you want nested

DJMcMayhem

I think you're missing a len

user

@RedwolfPrograms Ooh, that's a good idea

hyper-neutrino

@DJMcMayhem *facepalm* i keep forgetting that we're not given L

fortunately i do not have to worry about running out of time to edit :D

DJMcMayhem

mOD aBUSe!@!!1!1!11!!!!

Sandbox Posts

0

A: Sandbox for Proposed Challenges

Combinatorial Pipes math combinations You're a plumber working on a house, and there's some connections of different given angles that you're not sure how you're going to complete. You have 8°, 11.25°, 22.5°, 45°, and 90° fittings at your disposal, and you want to use as few as possible to match ...

Redwolf Programs

4:54 PM

Yes! Found a super short way to get the orderings of an array in JS.

It's O(n^(n+1)) though lol

hyper-neutrino

lol

caird coinheringaahing

@RedwolfPrograms I'll say no

Redwolf Programs

I did it!

Javascript, 176 bytes:

d=>[...Array((m=d.length)**m)].map((_,i)=>d.map(_=>(r=d[i%m],i=i/m|0,r))).find(x=>[...x].sort()+""==d.sort()&&!x.some((n,i)=>i>0&i+1 in x&(s=Math.sign)(i-x[i-1])==s(i-x[i+1])))

hyper-neutrino

is this to the no-three-sorted challenge?

Redwolf Programs

Yep

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