The Nineteenth Byte

Leaky Nun

10:00 AM

@Shaggy congratulations!

guys, I'm planning a challenge

the easy version would have two numbers as input

the difficult version would have a list of numbers as input

which one should i post?

Jan Dvorak

depends

Adám

@LeakyNun What's the challenge?

Leaky Nun

@Adám I prefer to keep it secret until I post it.

Adám

@LeakyNun Then how are you expecting us to answer your Q?

Leaky Nun

@Adám alright

Jan Dvorak

10:12 AM

@LeakyNun XKCD 8-ball says: 🏇☔

Leaky Nun

@JanDvorak I'll post the easy version and hope that it isn't a duplicate.

It seems that easy challenges are quite popular.

Jan Dvorak

Have you tried using the sandbox?

Leaky Nun

@JanDvorak I don't.

that said, I do recommend people to use the sandbox :p

Kritixi Lithos

when are you going to post it?

Leaky Nun

I found a relevant challenge....

Kritixi Lithos

10:17 AM

what is the challenge?

Leaky Nun

@KritixiLithos within 15 minutes, if I can convince myself that my question wouldn't be closed as duplicate

@KritixiLithos Alright, I'll comment the challenge as relevant and leave the decision to the community. I'll start writing the challenge now.

Beta Decay

Hehe it's not often we find a celebrity on PPCG :D

Leaky Nun

@BetaDecay who are you referring to?

Beta Decay

Jim Davis

Leaky Nun

hardly a celebrity though

Beta Decay

10:27 AM

Meh good enough

Someone a load of people recognise from outside PPCG is maybe a better description

Kritixi Lithos

but it was sad how he was treated with a downvote when he posted his answer

Leaky Nun

you can find terrence tao on math.overflow though

Beta Decay

Terrence Tao?

Nvm found him on wiki

betseg

Lake Disappointment

Lake Disappointment, or Kumpupirntily in the indigenous language, is an endorheic salt lake located in the Pilbara region of Western Australia. == Description == The 33,000-hectare (82,000-acre) lake typically is dry except during very wet periods such as the 1900 floods and in many recent tropical wet seasons since 1967. It lies on the Tropic of Capricorn, due east of the mining town of Newman and the Jigalong Community. It is at the northern side of the Little Sandy Desert and south of the Karlamilyi National Park. The Canning Stock Route passes down the western shores of the lake and t...

Leaky Nun

posted. @KritixiLithos

Beta Decay

10:33 AM

Do you always carry above the number? I only do that for subtraction, so ¹9 becomes 19

Leaky Nun

@BetaDecay I don't write the carries when I add up two numbers

but when I do, I write it below the addends

Kritixi Lithos

I carry above the number

Leaky Nun

however, it looks real ugly if I do this there.

Beta Decay

@LeakyNun I see, yeah that's what I do.

New Main Posts

2

Q: How many carries do I need to add these two numbers?

Task Given two positive integers, output the number of carries needed to add them together in long addition in base 10. Examples ¹¹¹ <-- carries 999 + 1 ---- 1000 Three carries are needed. ¹ 348 + 91 ---- 439 One carry is needed. Testcases 999, 1 -> 3 398, 91 -> 1 348, 51 -> ...

Leaky Nun

10:44 AM

Is my challenge that difficult? It's been 12 minutes.

Anonymous

Most people are asleep right now. It's unreasonable to expect answers in 12 minutes.

ASCII-only

@NewMainPosts (a,b,c=0,n=a%10+b%10>9)=>a&b?f(a/10|0,b/10|0+n,c+n):c :|

Leaky Nun

@ASCII-only why don't you post it there?

Kritixi Lithos

that looks so much like the code I am currently developing

ASCII-only

@LeakyNun Yeah, doing rnn

Leaky Nun

10:46 AM

@KritixiLithos why don't you post it there?

Kritixi Lithos

mine isn't done yet

New Main Posts

0

Q: Find the Mr of a Given Compound!

Challenge Given the formula of a chemical, output the Mr of the compound. Equation Each element in the compound is followed by a number that denotes the number of said atom in the compound. If there isn't a number, there is only one of that atom in the compound. Some examples are: Ethanol (...

omg

68 bytes in C

@KritixiLithos why don't you post it...

Kritixi Lithos

10:58 AM

it's still being golfed

this is my first C code-golf submission

@ASCII-only I need a bit of C help

ASCII-only

@KritixiLithos Remove the =0

@KritixiLithos ok, what do you need help on

Kritixi Lithos

how do I make TIO output the results for all the testcases using my function?

@ASCII-only ninja'd by user1502040 few seconds ago

ASCII-only

@KritixiLithos Just format the outputs? brb I'll send a link

Leaky Nun

@KritixiLithos here

Kritixi Lithos

simply printf("%d %d %d",f(num1,num2),f(num3,num4),...) doesn't work because I think the i and l are global

@LeakyNun but what about for my submission? ∧

ASCII-only

11:06 AM

@KritixiLithos Oh then use bash

Kritixi Lithos

I can't do it in C?

Leaky Nun

@KritixiLithos here

ASCII-only

@LeakyNun No he needs to reset global variables

@KritixiLithos Then just reset them every time you run the function

Leaky Nun

@ASCII-only yes he needs to; his current submission is invalid because of that.

Kritixi Lithos

@LeakyNun Try it online!

it borks

Leaky Nun

11:08 AM

@ASCII-only no it's invalid

you can have global variables, but you must reset it inside the function

@KritixiLithos your submission is invalid.

Kritixi Lithos

what

Leaky Nun

@KritixiLithos you need to initialize the global variables inside the function.

Kritixi Lithos

okay, fixed it, I had to use a non-recursive approach

ASCII-only

@KritixiLithos i,l;f(a,b){i=l=0;i+=a%10+b%10+l>9?l=1:0;a=a+b?f(a/10,b/10):i;} isn't allowed?

Leaky Nun

@ASCII-only that is allowed.

whether it is correct, I haven't checked it.

Kritixi Lithos

11:18 AM

@ASCII-only it gives 0 for all the testcases

because i and l are initialised to zero every iteration of the recursive function

ASCII-only

@KritixiLithos Oh yeah

@KritixiLithos btw testcases

New Sandboxed Posts

11:42 AM

0

A: Sandbox for Proposed Challenges

stdin FPS Count the input FPS ("F"s per second) Task: Read a potentially infinite text stream. While you do, display (at least once per second) your FPS, i.e. the amount the characters "f" or "F" appeared. The FPS has to be accumulated over a time frame of at least 5 seconds, meaning you can'...

caird coinheringaahing

12:12 PM

Why is chat so quiet?

ASCII-only

The Nineteenth Byte: General discussion for codegolf.stackexc...

16

6

Look at the blue line

caird coinheringaahing

Its not at its low point

is there a way to browse chat anonymously?

Adnan

I always open a chat in incognito mode

Arjun

codegolf.stackexchange.com/review/suggested-edits/40826

Could anyone review that ^

caird coinheringaahing

@Arjun I like that definaition

ASCII-only

12:19 PM

@cairdcoinheringaahing Yeah, transcript

caird coinheringaahing

@ASCII-only as in the current conversation

ASCII-only

@cairdcoinheringaahing Refreshing the transcript :P

@cairdcoinheringaahing Or just log out

Arjun

@cairdcoinheringaahing Thanks! :)

caird coinheringaahing

unrelated: how does the jelly compression work?

ASCII-only

@cairdcoinheringaahing Dictionary compression (dictionary indices)

Arjun

12:25 PM

@Mr.Xcoder Do you still answer on StackOverflow?

Mr. Xcoder

12:42 PM

@Arjun Yes, I do still answer (once a week maybe) on SO.

@Arjun why are you asking? Have we ever answered each other on SO>

@Arjun are you still on?

LegionMammal978

Hmm

Occasionally, when I paste out of a Mathematica notebook, a random character is added to the end

There doesn't seem to be much of a pattern to this; here's the result of several repeated pastes, where a space represents no extra character:

!AA 11 A11q A11A!A1A111q1! 1!! A1!AAaA1!q 11aaQAa1QA1Qa11  1!1AqQ!Q1 1!a11a1 A1aQ1 11 a1!1AAq  !!1A11Q

CMC: Find a pattern in this

Mr. Xcoder

@LegionMammal978 Mathematica randomness of A, !, q, Q, a and 1, obviously :)))

LegionMammal978

@Mr.Xcoder But why those characters?

Mr. Xcoder

@LegionMammal978 Because we are talking about Mathematica, duh :)))

Arjun

@Mr.Xcoder I find it very difficult to find out a good question to answer. Most of javascript tagged question seek help regarding an external library. I don't think there are any good native JS questions left. :(

@Mr.Xcoder Sorry for the delay. I was away from the keyboard.

Mr. Xcoder

12:54 PM

@Arjun that's true... The same applies for most of the Python and Swift questions

And that's mainly because people have a pleasure in receiving a good question about the language badly...

Arjun

Poll : Do you think the quality of questions on StackOverflow is getting worse day by day?

Vote on this poll

Okx

the only se site i'm active on is ppcg

Adnan

@Arjun for anonymity

Mr. Xcoder

I'm on SO as well, the complexity is getting higher and higher

Arjun

@Okx So am I.

Okx

1:03 PM

but yeah i think the so questions are pretty low quality, where most of them are posted by users with < 100 rep

Arjun

Question : Does using a template make me a bad web developer?

Mr. Xcoder

YEs.

Arjun

@Mr.Xcoder Yes to me or Okx?

Okx

@Arjun no because laziness is the most important thing when you're a web developer

Mr. Xcoder

@Arjun to both.

Arjun

1:06 PM

ooh

CMC : Given a string s, output s with all runs of same letter, condensed. Like heelloooooo to helo.

@Arjun JavaScript, s=>s.replace(/(.)*/g,"$1")

Really :|

@Arjun 4 bytes

Retina, 3 bytes: D`.

@Arjun 05AB1E, 1 byte: Ô

Arjun

Sorry, my answer is wrong.

Kritixi Lithos

1:16 PM

s=>s.replace(/(.)\1*/g,"$1")

Arjun

What's that \1?

Using $1 inside the regular expression?

Kritixi Lithos

1:32 PM

\1 matches the content of the first capture group

\n matches the content of the n-th capture group, where n is a number

if I didn't mess anything up

Leaky Nun

2:06 PM

@KritixiLithos I'm surprised you didn't bring up Röda

New Meta Posts

0

Q: Why should Brain-Flak pay for input when Python doesn't have to?

Currently if you wish to take input as a string in Brain-Flak you are going to need the -A flag. This will cost you 3 bytes. Currently if you would like to take input as a string in Python you are allowed to use input() and assume that the input ins provided in a proper string format (Python IO...

discussion

Kritixi Lithos

in which case, it would be something like {_/""|uniq} (untested)

Arjun

2:25 PM

Is @Dennis South African?

Kritixi Lithos

that's random

Arjun

@KritixiLithos ?

that's random?

Is Dennis South African? -> that's random

Leaky Nun

@Arjun no, he's German, if I recall correctly

although he's in South America, also if I recall correctly

Arjun

I think Martin is also German.

Yes he is.

Nathan Merrill

2:41 PM

@HelkaHomba Strings don't have a default Comparator. They are Comparable, which is why you can't find it

Arjun

@LeakyNun Are you Japnese?

Leaky Nun

@Arjun I'm from Hong Kong, which makes me ethnical Chinese.

and I rather not deal with politics.

Arjun

ok

DJMcMayhem

2:56 PM

@LeakyNun Because Hong Kong used to be it's own country until it was recently bought by China, right?

Leaky Nun

@DJMcMayhem no, more complicated than that

DJMcMayhem

Oh?

Leaky Nun

Hong Kong was a colony of UK, or GB, idk&idc

and then in 1997, the contract expired, and HK was returned to China

and then I'll skip 1000 words because you probably aren't interested

DJMcMayhem

@LeakyNun I'm interested enough to ask about it :P

Leaky Nun

alright

but then before the return, ppl are freaking out

Kritixi Lithos

2:58 PM

@Arjun I meant the question was random, it came out of nowhere

Leaky Nun

so China promised to not care too much about HK

so HK became HKSAR (special administrative region)

and China doesn't interfere too much

but HK isn't a country in its own right

because China says HK isn't

e.g. the military and foreign relationships are taken care of by China

but somehow HK has its own olympic team

so the situation is very complicated

DJMcMayhem

Is Mandarin the official language?

(Google just says Chinese without being more specific)

Leaky Nun

we have three official spoken languages: Cantonese, Mandarin, English.

and two official written languages: (traditional) Chinese, English.

Is anyone familiar with Prolog?

p(0,1).
p(N,A):-M is N-1,P(M,B),A=[B].

TIO

I expect p(5,X). to give X=[[[[[1]]]]]

why doesn't it work as intended?

Adám

3:40 PM

@LeakyNun APL, 6 bytes: ¯1∘*×⊢

Leaky Nun

@Fatalize above

Adám

@Arjun APL, 11: {⍵/⍨1,2≠/⍵}

DJMcMayhem

@Adám toeq*

(I know that was leakys CMC, not yours)

caird coinheringaahing

Does a code page have to have 256 characters on it or can it have less?

Fatalize

3:58 PM

@LeakyNun I'm here

Leaky Nun

@Fatalize the above

Fatalize

LOL

you wrote P(M,B) instead of p(M,B)

Prolog very helpfully told you false., quite obvious what the problem was really :p

Leaky Nun

that was stupid

Fatalize

TBF if you had opened the debug tab on TIO you would have seen an error

so it told you false because it only had compiled p(0,1)

DJMcMayhem

@cairdcoinheringaahing It can have any number. For example, ASCII has 127 and utf-8 has too many to count

It's only limited by information theory and mathematics :P

totallyhuman

4:09 PM

do you mean only one-byters?

DJMcMayhem

Really all a code page is is an arbitrary mapping of Unicode characters to byte sequences of arbitrary length (usually 1)

Nathan Merrill

4:31 PM

put another way: My code page could say that the byte "10001000" means "A", while your code page says that it means "B"

caird coinheringaahing

Also, I am designing a 2D language which fits on the edges of a cube and uses spaces and new lines in the unfolded version but cannot contain either in the compiled code. Does whitespace need to be included in the code page?

Nathan Merrill

it depends: do you need those bytes?

before you define your code page, define the bytes 00 to FF

so, if your language needs a byte to be the delimiter between two other bytes, then yes, it needs to be in your code page

DJMcMayhem

4:47 PM

@LeakyNun Jelly, 4 bytes: ḂḤ’×

Leaky Nun

@DJMcMayhem nice

DJMcMayhem

Thanks! I'm not that great at Jelly, but that's a pretty simple program

Leaky Nun

5:08 PM

@DJMcMayhem Jelly, 3 bytes: N‘¡

Adám

@DJMcMayhem Nice. Can you explain it?

TuxCopter

5:35 PM

ಠ_ಠ

totallyhuman

wat

DJMcMayhem

@LeakyNun What does ¡ do? I can't find it on the wiki

Leaky Nun

@DJMcMayhem it's in the quicks

DJMcMayhem

@Adám if a is the input, it computes (from left to right) (a%2)(doubled)(-1)(*a [the second 'a' is implicit])

Wheat Wizard

Could I get a Haskell golfer to look at this?

Jan Dvorak

5:46 PM

x:[] == [x]

function application is top priority and doesn't need extra parentheses

Wheat Wizard

thanks

Downgoat

> You no longer have to fantasize about being a goat

ಠ_ಠ I am not fantasizing

Kritixi Lithos

@Downgoat where is that from?

a sheep?

Downgoat

@KritixiLithos goat-simulator.com

Kritixi Lithos

"To be completely honest, it would be best if you’d spend your $10 on a hula hoop, a pile of bricks, or maybe a real-life goat."

Downgoat

6:01 PM

real life goat cause $75-$150 and usually and extra $100 per goat

ETHproductions

why would you want a pile of bricks

Or a $10 hula hoop

Okx

sheep > goat

Downgoat

quetion: how to golf:

var a = b
if (!a) a = c
else d.shift()

without duplicating b (JS)

Kritixi Lithos

I don't get the purpose of var a=b

Downgoat

b is more complex, i abstraction for this porpose

Kritixi Lithos

6:04 PM

and btw, you can drop the var if it is needed

ETHproductions

Your current code could be var a=b?(d.shift(),b):c

@Downgoat Oh, so you can only use b once?

Downgoat

yeah

ETHproductions

Hang on a second then

var a=b;a?d.shift():a=c

Dunno if you can get shorter

Kritixi Lithos

why do you need the var?

Downgoat

production code but has to seem at least a little readable

I don't think I can get shorter than:

let args = process.argv.slice(2);
let cmd = subcommands[args[0]];

if (cmd) args.shift();
else cmd = modes.Default;

in terms of removing the if with short-circeut (excluding a && b || c)

caird coinheringaahing

6:46 PM

Quick poll. Marmite: yes, no or dont know what it is?

Jan Dvorak

I assume it's something like Nutella, in which case no

DJMcMayhem

7:07 PM

@cairdcoinheringaahing nope

Mama Fun Roll

7:17 PM

Hey guys, It's been a LONG time since I've been here :P

github.com/molarmanful/lin

New language I've been working on, I might answer a challenge some time with it.

Downgoat

@MamaFunRoll cool :D +1 for JS

:| Is source code intentional golf or just editor indentation borked

caird coinheringaahing

@JanDvorak you ever heard of Vegemite? Marmite is Vegemite's dad

flawr

7:39 PM

@Lembik Are you here? I've a question regarding your approximate correlation challenge. (see comment there)

MD XF

@cairdcoinheringaahing Isn't it like a cooking oil?

New Main Posts

0

Q: Read a password: on mobile!

Thanks to MD XF's recent challenge, we can now read passwords in many different languages! The problem is, now we need to port our applications to mobile devices, and they do password entry a little differently. Challenge Read a string from the keyboard. Each time a characterk is entered, disp...

code-golf string

mınxomaτ

8:03 PM

ufw gurus here?

Phoenix

What's ufw?

caird coinheringaahing

@MDXF no where near

en.m.wikipedia.org/wiki/Marmite

MD XF

Oh, I was close enough :P

Phoenix

Clion keeps telling me it can't find a c++ compiler. I've done dnf install gcc and dnf group install 'Development Tools'

Adám

CMC: Given an ordered set and a member of said set, demote the member to the very end of the set. E.g. {2,7,1,8} and 7 → {2,1,8,7} and ["Mercury","Venus","Earth","Mars"] and "Earth" → ``["Mercury","Venus","Mars","Earth"]`

Phoenix

8:05 PM

._,

@Adám s->n->s.add(s.remove(n))

Adám

What language is that? JS?

Phoenix

Java

Adám

@Phoenix Ooh, Java being "shortish".

Phoenix

IDK how it works if the ArrayList given as input is an ArrayList of Integers, because if ArrayList.remove() is given an int it removes at the given index.

Adám

@Phoenix What if you wanted to promote instead?

Phoenix

8:09 PM

@Adám Add 0 as the second parameter to s.add()

Adám

@Phoenix A Java solution which is only 8 times the length of the equivalent APL is very impressive.

Phoenix

APL is a golflang it doesn't make sense to make that comparison.

programmer5000

Is there a challenge to output the MD5 of the input?

I can't find one.

Downgoat

@Adám JavaScript: a=>n=>a.push(a.splice(n,1))

Adám

@Phoenix What are you talking about? APL is not a golfing language at all. It is a commercial production language.

Nathan Merrill

8:13 PM

@Phoenix I'm pretty sure that works with Integer, because it won't box it to an integer unless it needs to

so, it has two methods a.remove(Integer) and a.remove(int) called with an Integer will call the first method

Downgoat

@Adám idk what you're talking about :P

Adám

@Downgoat IDK what you're referring to.

MD XF

@Downgoat if you learn Triangular I will make a goat builtin

Downgoat

goat builtin first

Phoenix

@Downgoat OOOH REKT LONGER THAN JAVA

I feel so happy rn

Adám

8:16 PM

@Phoenix REKT ?

Downgoat

@Phoenix opls to run labmda you have to do like:

interface Program<T> {
    Program2<T> execute(ArrayList<T>)
}

interface Program2<T> {
     ArrayList<T> execute (int n)
}

class Runner {
    public static void main(String[] args) {
        Program<T> prog = ....
        prog.execute(goat).execute(2)
    }
}

Phoenix

@Downgoat Not the point

A lambda is a valid solution in java

programmer5000

@ASCII-only Thanks! That worked.

Phoenix

@Downgoat Also no you can just assign it to a java.util.Function<ArrayList<Object>, Object>

Downgoat

opls

that typename is longer tha the program itself

Phoenix

8:19 PM

Actually it might be a differnet type, I think that one takes an ArrayList as a parameter and returns an Object.

New Main Posts

0

Q: MD5 the input given!

Your challenge is to output the MD5 hash of your input. The specification of MD5 can be found here. Crypto builtins are allowed. Shortest code wins.

code-golf string cryptography hashing

Nathan Merrill

nah, the type is really Function<List<T>,T>

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

Quote my quote! code-golf string A quotation is "the repetition of one expression as part of another one". In American English, a quotation is surrounded by double-quotation marks ("), as in the previous sentence. However, this rule differs when a quote appears inside another quote. In this case...

DJMcMayhem

8:38 PM

Mildly interesting:

MD XF

Good job

DJMcMayhem

That's the very first tag badge I've ever gotten that isn't on PPCG

MD XF

I need 67 more votes for the silver code-golf badge

DJMcMayhem

I just need 50 more answers for the string gold.

Wheat Wizard

Does anyone know why :t (\x -> ((show x) ++ " ")) gives (\x -> ((show x) ++ " ")) :: Show a => a -> [Char]?

user165474

8:41 PM

I still need 87 votes for the silver code-golf badge ;_;

Wheat Wizard

I would like it to be Integer -> [Char], Is there some way to do this?

MD XF

@MartinEnder I'd just like to say, Hexagony is very ... wow

programmer5000

Should I allow crypto builtins here: codegolf.stackexchange.com/q/125868/58826

Wheat Wizard

In my opinion builtins should never be banned

MD XF

@WheatWizard Never?

Wheat Wizard

8:50 PM

yep.

MD XF

Even for math questions when there's a Mathematica builtin for the entire challenge?

Wheat Wizard

yes

Downgoat

Poll: What should VSL initializer syntax be?

Wheat Wizard

The reason is twofold 1) There is no good definition of what a builtin is, and there likely never will be 2) If the challenge is simple enough that a good deal of languages already have a builtin then you should probably just treat it as a catalog, like the addition question.

MD XF

Good point

Does anyone want a +200 bounty for writing a Triangular quine?

user165474

8:58 PM

@Dennis This is getting delete votes again; is that ok if it's deleted or should it stay?

user165474

@MDXF I'll try...

MD XF

@HyperNeutrino Why should it not be deleted?

Wheat Wizard

@MDXF it on TIO?