The Nineteenth Byte

Consider the following list: list = {{1}, {1}, {1}, {1, 6}, {1, 4}, {1, 3, 5}, {1, 3, 2}}; How can the sub-lists be padded to the length of the longest sub-list (in this case 3), with the last value of the sub-list? The expected result is {{1, 1, 1}, {1, 1, 1}, {1, 1, 1}, {1, 6, 6}, {1, 4,...

list-manipulation

I feel like this would make a great challenge

I also suspect it may be a dupe, so CMC: That ^^

Downgoat

@DJMcMayhem JS 87 bytes: a=>a.map(i=>i.push(...Array(Math.max(...a.map(i=>i.length))-i.length+1).fill(i.‌pop())))

modifies the source array

quartata

@Downgoat You can't see all replies to replies, only one thread

ASCII-only

@DJMcMayhem Charcoal, 16 bytes: Ｅθ⁺ι…⟦¹⟧⁻⌈ＥθＬλＬι

quartata

If you want to see all the replies to a reply you have to click on it. That's what ASCII means

ASCII-only

the funny thing is that i'm using wolfram lists for display

Downgoat

1:13 AM

@quartata that doesn't mean they aren't nested/threaded

@ASCII-only :O since when does charcoal do array

quartata

They're not arbitrarily nested though. The thread is essentially flattened

ASCII-only

@Downgoat array input? for a couple of weeks now

Downgoat

@ASCII-only I think it's supposed to add the existing last elem as padding

ASCII-only

@Downgoat ah oops

@DJMcMayhem Charcoal, 19 bytes: Ｅθ⁺ι…⟦§ι±¹⟧⁻⌈ＥθＬλＬι

DJMcMayhem

Why longer?

ASCII-only

1:16 AM

@DJMcMayhem I padded it with [1] the first time >_>

Downgoat

1:31 AM

@ASCII-only we should have chaining syntax for VSL

ASCII-only

@Downgoat chaining?

Downgoat

goatDetector@processGoat(image: image)
            @processResults(format: .json)

where func class GoatDetector#ProcessGoat and func class GoatDetector#processResults

ASCII-only

fluent interface?

imo that should be up to the user

Downgoat

@ASCII-only fluent interface? is that a C# term?

@ASCII-only what do you mean by that (you mean they should explicitly add -> Self and return self in all functions)?

ASCII-only

@Downgoat no it's an every language term

@Downgoat yeah. because it'd be weird if void methods could just be chained

Downgoat

1:44 AM

@ASCII-only :/ ok

anyone else in TNB have opinions

ASCII-only

actually that's not what you're talking about right? or is it

Downgoat

@ASCII-only not by default, but if you use a special "chain" operator to call a method it will allow you to use chain operator again and refer to the same method

e.g. let x = goatDetector@voidMethod() would still error

ASCII-only

@Downgoat ah, i see. then you should definitely add that :P

Downgoat

do you have suggestion on what operator should be then?

ASCII-only

not really. but @ should be apply like normal languages imo

quartata

1:52 AM

@Downgoat Seems like this might get a bit confusing if the method returns something

Adding a decorator to automatically make a void method return this might not be a bad idea though

ASCII-only

@quartata but it would be inconsistent

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

The challenge Implement a command, !oldest, that gives the oldest user in the server that the command that was run in. Gracefully failing in DM channels is not required. Assume the bot's token is this invalid token: MjM4NDk0NzU2NTIxMzc3Nzky.CunGFQ.wUILz7z6HoJzVeq6pyHPmVgQgV4. If the token is co...

ASCII-only

2:10 AM

@NewSandboxedPosts ...

New Main Posts

2

Q: Enklactify these strings

Inspired by this comment chain... I wanna enklact my way out of this challenge but I can't... @ETHproductions to enklact (v): to implement a lookup table using a subsection consisting of unique elements. Enklacting is a very useful way to compress a lookup table. For example, let's s...

code-golf string

DJMcMayhem

Wowzers that was fast

ASCII-only

@DJMcMayhem i wonder if they've finally fixed the feed bots

Anonymous

@ASCII-only Definitely not

ASCII-only

@djm oh btw why does it link to mathematica question

DJMcMayhem

2:22 AM

Cause I'm a dunce lol

@ASCII-only I had that in my clipboard because I posted that link in chat a few minutes ago, I forgot that I never copied the right link

ASCII-only

hmm.

is it ok to return all strings :P

DJMcMayhem

I mean, in theory I don't object to it, but challenge spec says no

ASCII-only

:| so long

ASCII-only

2:42 AM

@Dennis wait why did you delete your answer

Pavel

@ASCII-only It's back up

It was probably invalid for some case

DJMcMayhem

@Dennis Added

Dennis

@ASCII-only I'm using 0 as a filler element. Sadly, the column ['b', 'c', 0] contains three unique elements, so my answer considered it valid.

@DJMcMayhem Thanks. Fwiw, amending my answer to return all strings means I have to remove the last byte, so I wouldn't mind.

ASCII-only

i'm sure for most people returning all is shorter :P

+ they have a [0] or equivalent somewhere

DJMcMayhem

@Dennis Yeah, that would have been way better, but All or one sounds weird and I don't want to invalidate anything

Maybe there's a better solution but I'm not sure what it is

ASCII-only

2:51 AM

:| the charcoal one is disappointingly long

Dennis

@DJMcMayhem Not that weird. Sequence challenges usually use n-th (0- or 1-indexed), first n, or all.

@ASCII-only Unless it's a recursive approach.

ASCII-only

or iterative, yeah

Dennis

@DJMcMayhem Re: Throwing exceptions is not allowed. That's kinda overriding our defaults. STDERR can be ignored, and a full program that raises an exception "prints" the empty string.

DJMcMayhem

Ok, removed that

Pavel

3:57 AM

I just bought a copy of the The IEEE Standard Dictionary of Electrical and Electronics Terms First Edition (1977) at Half-Price Books for three dollars and that makes me really happy for some reason.

ASCII-only

@Pavel :|

Pavel

I gave it it my dad, he like collecting these kinds of old manuals. We have a printed copy of the Unicode Standard, Third Edition.

ASCII-only

@Pavel perl -e'print":| "x2'

New Sandboxed Posts

4:59 AM

0

A: Sandbox for Proposed Challenges

Bananagrams Solver code-challenge string Bananagrams is a tile-based word game where you race to make crosswords and use all your letters before everyone else does. In the original game, finishing your crossword allows you to say "peel", causing everyone to draw another letter tile. Whoever f...

New Main Posts

5:15 AM

1

Q: Word Search on a Torus

The Challenge Given a list of words and a grid of letters, your job is to determine which of the given words can be found on the grid in all 8 directions (forward, backward, up, down, and the 4 diagonal directions), much like a word search. The grid is toroidal, so the grid wraps around on the e...

code-golf string grid

Soaku

9:15 AM

@Mr.Xcoder Mr-Xcoder created a repository Mr-Xcoder/test-website 20 seconds ago... hmm

Mr. Xcoder

@Soaku Yes?

Soaku

@Mr.Xcoder Nothing, I entered github and saw this.

Cows quack

10:10 AM

@Downgoat in the grad-design userscript, the settings button (the one where we can change propose=>porpoise) appears to have disappeared from the navbar

Lynn

12:30 PM

oh no... what should I do if I don't want to hammer something I think is a duplicate, and just leave a close vote?

I'll leave a comment I suppose ><

Mr. Xcoder

12:54 PM

@Lynn You don’t have a choice, unfortunately... blame-se

New Sandboxed Posts

1:09 PM

0

A: Sandbox for Proposed Challenges

Palindromic Sum code-golfmathnumberbase For some all bases g ≥ 5, we prove that any positive integer can be written as a sum of three palindromes in base g. This is the theorem proven in this paper by Cilleruelo, Luca, Baxter. Challenge Given a positive integer n and a base g ≥ 5 find t...

user202729

1:24 PM

@Lynn Edit out the tag, VTC, rollback. (don't)

apio2018.ru/schedules 7 days left.

New Sandboxed Posts

1:43 PM

0

A: Sandbox for Proposed Challenges

Take an expression containing these functions, check whether it's true: 1 int one() 1 - int neg(int) -a + int add(int, int) a+b * int mul(int, int) a*b > bool gt (int, int) a>b & bool and(bool,bool) a&b | bool or (bool,bool) a|b % bool any(var, expr) whether a be any value ...

user202729

Is there anything in J that is similar to Jelly Ð¡? (repeat with accumulation)

Wow. Why are there only 17 users here?

Normally there are twice as much...

dzaima

CMP: what should Canvas return for 1/0? It's either 0 or 1 (or maybe the dividend?) but that doesn't make much sense, or Infinity, but breaks on pretty much every mathematical operator

user202729

Error out? Sometimes error can be useful.

dzaima

@user202729 golflangs & erroring = bad golflang. 9/10 times it won't be useful

user202729

(for the Google challenge perhaps?)

dzaima

1:54 PM

@user202729 yeah I noticed that and my first thought was that the user list was glitching out :p

user202729

Then...

I don't know. Ideally it should return a result that would minimize the bytecount for commonly generated constants.

dzaima

I think imma go for just returning the dividend as that preserves the sign and acts like nothing happened

user202729

2:29 PM

36 mins ago, by user202729

Is there anything in J that is similar to Jelly Ð¡? (repeat with accumulation)

New Sandboxed Posts

2:39 PM

0

A: Sandbox for Proposed Challenges

Queuez A typical stack-based lanaguage uses nilads, monads, dyads, and occasionally operations with larger numbers of arguments. As each operation is processed, the values are stored on a stack, so that if you want to apply an operation to the result of other operation(s), you simply invoke thos...

FrownyFrog

2:53 PM

^:(1 4 5) is 1st 4th and 5th iteration in a table

^:(<5) is 0 to 5

saves one byte compared to ^:(i.5)

and ^:a: is like ^:_

@user202729 ↑

and there’s that thing where x f@[&0 y is equivalent to f^:(x) y

works with a: and _ but not negatives for some reason

user202729

3:08 PM

What does the m, u, v denote? Noun and verb?

FrownyFrog

m and n are nouns

v and u are verbs

user202729

@FrownyFrog It does work for negative for me. tio.run/##y/r/PzU5I18h3lBBw1BTTVtBw1Tz/38A

No it doesn't. That's only for specialized dyads.

FrownyFrog

that’s not even the @[&0 thing

or is it

user202729

If J were designed for code-golf, they would specialize that so it's invertible. In real life, there is no point in composing a verb to [ and then right-bond to 0 (that is, no-op).

FrownyFrog

i don’t understand

it works with a:

but not negatives

user202729

3:17 PM

Because f@[&0 ^: _1 doesn't work either.

FrownyFrog

tio.run/##y/r/PzU5I18h0UpB18ohWs1AQcNQkwsspGsVZwUURuHHGyL4QDZCy/…

user202729

tio.run/##y/r/PzU5I18hWs1AITOvTMHk/38A

NB. they both error
echo -:@[&0 ^:_1 (1)
echo _1 -:@[&0 (1)

FrownyFrog

I mean a: is an empty box, it already has to be fairly specialized to understand what I mean by a:

am I being dumb

user202729

^: is specialized. Dyadic & just converts to ^:.

FrownyFrog

right

user202729

3:22 PM

In chat.stackexchange.com/transcript/message/44426237#44426237, the latter directly converts to the former.

And @[&0 is not specialized to no-op.

FrownyFrog

>the latter directly converts to the former.

how do you know?

user202729

Because why not...

> x m&v y ↔ m&v^:x y
x u&n y ↔ u&n^:x y

FrownyFrog

ohhhhhhh

thanks

it’s a nop but it’s still there, and it messes it up

well it should have an inverse

it’s 2018

user202729

J is not designed for code golf.

(Because no one use it, no one specialize it)

(it would be good if they just specialize /:\. to construct a suffix array and +//.@(*/) to do FFT)

FrownyFrog

/:\.?

what do you mean?

user202729

3:33 PM

Sort by suffixes of (a string).

For example assume st=:'string$' then (i.#st)/:[\.st is its suffix array.

Oops, I missed a [.

flawr

5:06 PM

Jan 30 '16 at 20:42, by Optimizer

> Jon Skeet can make PPCG graduate

Where is he when you need him...

Erik the Outgolfer

5:26 PM

CMC: given number N, 1) calculate M = N mod 256, 2) convert M to binary and call it B, 3) pad B to 8 bits and call the result P, 4) reverse P and then join the bits in a string with ][, prepend [ and append ]

New Bounties With No Deadlines

0

A: List of bounties with no deadline

Prove the black magic formula I'm offering 250 rep for a write-up proving my black magic formula for the number of triangular lattice points within a given distance to the origin. The proof should be well-presented, accessible without loads of math background, and self-contained. By self-contai...

Cows quack

@EriktheOutgolfer M=N, so the first step can be skipped

ngn

@EriktheOutgolfer APL: ,'[',']',⍨⍕⍪⌽(8⍴2)⊤N

Cows quack

can this be shortened using ⎕JSON?

Erik the Outgolfer

@Cowsquack I mean M=N%256, you can see I used = and not ≡, and it's mod 256 and not (mod 256)

ngn

5:33 PM

@Cowsquack I'm not sure, there's no , between ] and [

Erik the Outgolfer

@ngn uh, you can't assume the input is in a variable...

ngn

@EriktheOutgolfer ok, then: ,'[',']',⍨⍕⍪⌽⎕⊤⍨8⍴2

dzaima

@EriktheOutgolfer Canvas, 18 bytes

13 bytes

ngn

@Cowsquack actually, you were right about ⎕json: ∊⎕json¨,¨⌽⎕⊤⍨8⍴2

Cows quack

you missed the comma in between the ]['s

Erik the Outgolfer

5:41 PM

because it doesn't exist, yes

Cows quack

oh, I misunderstood the cmc

Erik the Outgolfer

@EriktheOutgolfer GolfScript, 5 bytes: ~]zip

dzaima

@EriktheOutgolfer what

Soaku

@EriktheOutgolfer what

FrownyFrog

6:00 PM

NaN%

flawr

6:17 PM

@FrownyFrog please use infix for percentages

Erik the Outgolfer

6:45 PM

@flawr huh

I mean, X% doesn't even take a second argument

flawr

7:20 PM

@EriktheOutgolfer but it makes it easier to ad promilles etc

Erik the Outgolfer

that kind of already exists, and it's called division

flawr

@EriktheOutgolfer 1%2‰3‱4

Erik the Outgolfer

ah, so something like 0.12345 would be 12#3#4#5

flawr

(tenths)%(hundreds)‰(thousands)‱(ten-thousands)

not confusing at all :)

moonheart08

I now have the best possible reputation. It's a 502: Bad Gateway Error

~~now i just need 2 downvotes so i'm an internal server error~~

Anonymous

7:33 PM

@EriktheOutgolfer Actually, 22 bytes: ├8'0*+8±@tR"]["j'[+']o

Erik the Outgolfer

hm, maybe you can save a byte if you can do something along the lines of Python's (. . .).join('[]')

moonheart08

@Mego for a second i thought you were correcting yourself/erik

lol

Erik the Outgolfer

yes, that's pretty much the intention for naming the language as such

Anonymous

@moonheart08 That's the joke with the name :P

moonheart08

:P

Anonymous

7:36 PM

@EriktheOutgolfer I do use str.join with j

Erik the Outgolfer

I meant on the '[+']o part

well, if j takes arguments in the reverse order, then you're out of luck

(and, yes, I still get a weird feeling when I start reading the solution before my consciousness kicks in)

ah, it looks like you can't do that, what a pity

Pavel

8:31 PM

Leaked upcoming What Wizard profile pic

6

betseg

8:43 PM

wait ive just noticed

week starts with sunday in the us

and sunday is weekend? wut

ngn

8:56 PM

@betseg it makes sense: sunday is on one end of the week, saturday on the other :)

Riker

@Pavel can somebody give me the raw image from here

don't have RES right now to disable CSS

and dear god nope not going into that subreddit

betseg

@Riker i.imgur.com/owrYDWm.jpg .

Riker

ty

and oh dear god that possum

oh nvm that's a cat

Pavel

9:26 PM

@Riker What is that subreddit? I was on r/all

DJMcMayhem

@AdmBorkBork 100/100! Only 0 left to go! :P

betseg

@DJMcMayhem so, 1.07 * 10^-156? r/unexpectedfactorial

Erik the Outgolfer

@DJMcMayhem what?

is it a comment Adm made somewhere?

DJMcMayhem

9:43 PM

Yeah, he's been mocking me for not getting Socratic yet

quartata

10:08 PM

Hey @ConorO'Brien remember all that stuff I said about CGameMovement a couple days ago? Turns out it's all wrong for TF2

Your forwardmove doesn't seem to matter at all, just that it's not 0

It accelerates to the class's speed no matter what

BUT

I can't find where it does that anywhere

github.com/NicknineTheEagle/TF2-Base/blob/…

mv->m_flForwardMove isn't modified anywhere else, it should come from the usercmd

What gives

I hate this

Riker

@Pavel just the dumbest stupid stuff ever

and the css is horrifying

@quartata is that user from valve?

or just somebody hosting a mirror of the source

@betseg til that gem existed

quartata

@Riker No, this is the leak of the 2007 TF2 source ported to Source 2013

Riker

ah cool

quartata

this game sucks

Riker

also @quartata found this gem

quartata

10:15 PM

snort

Riker

winsalot isn't much better in irc

quartata

wait, what is that fork

"Spoonbender"

Riker

slashem extended?

looks like an insectoid medium(?)

mediums are reasonably fun but only if you don't mind the starting weapon that makes everything dark

dev commented below so looks liek it

Erik the Outgolfer

@DJMcMayhem oh, that

Lynn

11:01 PM

5

♪ ~black magic~ ♪

Adám

What does IMHO mean?

ASCII-only

11:17 PM

@Lynn ???

Dennis

11:44 PM

@Adám OMG someone voted honest.

Adám

@Dennis TMI.

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