The Nineteenth Byte

Mr. Xcoder

18:00

@me Python, 55 bytes: lambda s:' '.join(x[-1]+x[1:-1]+x[0]for x in s.split())

totallyhuman

also the question isn't a dupe

nothing's a dupe of the sandbox :P

it is off-topic

Mr. Xcoder

CMC: Given a number n, output n-1/n

totallyhuman

lambda n:n-1/n

Step Hen

@Mr.Xcoder n=>n-1/n

Mr. Xcoder

@totallyhuman Nice, id'say

totallyhuman

18:03

,,,, 5 bytes: :1-⇆÷

Mr. Xcoder

5 bytes, Pyth: -Qc1Q

Step Hen

cQuents, 9 bytes: #|1:A-1/A

totallyhuman

@Mr.Xcoder /-Q1Q would work as well right?

Rod

@Mr.Xcoder you can drop the trailing Q

Business Cat

Jelly, _İ

Mr. Xcoder

18:04

@totallyhuman Nope

@Rod Nope, I can't

HyperNeutrino

@BusinessCat damn, beat me to it xD

totallyhuman

@BusinessCat ’÷ would work too right?

caird coinheringaahing

@BusinessCat Me too

Business Cat

Thanks for reminding me I forgot about 1/n in Gaia...

caird coinheringaahing

@totallyhuman no that would produce 0.9 for 10

HyperNeutrino

18:06

@totallyhuman no

totallyhuman

or am i still misunderstanding jelly's chaining

Mr. Xcoder

@Rod I wonder why though

totallyhuman

@cairdcoinheringaahing wut why

caird coinheringaahing

@totallyhuman decrement then divide by input

HyperNeutrino

@totallyhuman that's equivalent to LEFT -> decrement -> divide <- RIGHT but RIGHT is LEFT

caird coinheringaahing

18:07

(10-1) / 10

totallyhuman

@HyperNeutrino oh

Business Cat

I've come up with some of the most random and useless operators I could think of but forgot about 1/n

why

Mr. Xcoder

@Rod It does not work: pyth.herokuapp.com/?code=-Qc1&input=5&debug=0

totallyhuman

@cairdcoinheringaahing that is what you're supposed to do

@cairdcoinheringaahing it wouldn't but that would be the right output

Mayube

One post, 4 answers

Business Cat

18:08

@Mr.Xcoder 5 - (1/5) is 4.8...

HyperNeutrino

  ÷
 / \
’   R
|
L

Mr. Xcoder

@BusinessCat It is

@BusinessCat -Qc1Q outputs 4.8

CensoredUsername

@Mr.Xcoder 8 bytes |n|n-1/n

Mr. Xcoder

@CensoredUsername What language?

totallyhuman

@CensoredUsername ruby?

Business Cat

18:09

Oh when I ran it the first time it gave me 4.8, I ran it again and it died a horrible death

CensoredUsername

rust

totallyhuman

ah

caird coinheringaahing

@totallyhuman n-1/n is n - (1/n) not (n-1)/n (bidmas)

HyperNeutrino

CMC: n -> (n - 1) ÷ n

Mr. Xcoder

@HyperNeutrino Even better

totallyhuman

18:09

oh

urgh why did i forget order of operations

HyperNeutrino

So ’÷ works for this xD

totallyhuman

my ,,, answer is wrong then

HyperNeutrino

lololol

caird coinheringaahing

@totallyhuman everyone's is

Mr. Xcoder

@HyperNeutrino 4 bytes (Pyth): ctQQ

totallyhuman

18:10

@HyperNeutrino ,,,, 5 bytes: :1-⇆÷

there :P

HyperNeutrino

xD

Mayube

@Mr.Xcoder Braingolf: .1,/- Note: Braingolf doesn't do floats, but the logic is still correct

HyperNeutrino

ah ok

Business Cat

Gaia, 4 sad bytes: :(¤÷

Mr. Xcoder

@BusinessCat Ties Pyth

Business Cat

18:11

But Pyth isn't sad

Although it is almost Q_Q

HyperNeutrino

Anyfix, 4 bytes: "’«÷

Mr. Xcoder

@HyperNeutrino Ties Pyth :)

totallyhuman

@HyperNeutrino that just looks like a collection of quote characters

dzaima

@HyperNeutrino SOGL, 3 bytes: H./

caird coinheringaahing

@HyperNeutrino Add++, 12 bytes

totallyhuman

18:13

my caret reply game is weak today

HyperNeutrino

two bytes are just random things required for stack-based stuff etc, otherwise it's just the jelly answer lol

@totallyhuman lol xD

Mr. Xcoder

If you don't know Pyth, I will give you a cookie if you gues what the code Pyth does in Pyth

You only have 3 tries

Pls don't look at the docs

caird coinheringaahing

Why isn't Pyth on TIO?!

Business Cat

c is divide, t is decrement?

Downgoat

@LeakyNun wait you are familiar with room mean average how do it even work

Mr. Xcoder

18:14

@cairdcoinheringaahing It is

Mayube

Just to prove the logic is correct:

    .1,/-  Implicit input [n]
    .       Duplicate [n,n]
     1     Push 1 [n,n,1]
      ,     Swap [n,1,n]
       /   Divide [n,(1/n)]
        -  Subtract [(n-(1/n))]

:D

Mr. Xcoder

@BusinessCat The program Pyth does not contain c.

HyperNeutrino

@cairdcoinheringaahing tio.run/#pyth

Business Cat

Oh lol I misread that

caird coinheringaahing

Oh yeah, I can't read

totallyhuman

18:15

[2] + [prime factors of input]

Mr. Xcoder

@totallyhuman Nope

@totallyhuman Well, technically it gives correct results, but it's not that

totallyhuman

yes..?

Mr. Xcoder

@totallyhuman Nope

Leaky Nun

@Downgoat room mean average?

you mean root mean square?

Mr. Xcoder

> technically it gives correct results, but it's not that

totallyhuman

18:16

yes i was a bit late

Downgoat

@LeakyNun ah yes

Mr. Xcoder

Hint: An implicit Q is added, so it's technically PythQ

Downgoat

if I want to use to find color at position n (n between 0, 1) between colors a, b

Mr. Xcoder

@totallyhuman Give up?

Downgoat

do I just do sqrt((red(a) + red(b)) / b)

Mayube

18:18

@Mr.Xcoder Head of the tail of the powerset of the prime factors of the input

Downgoat

that doesn't seem right though because then I never reach b

Leaky Nun

@Downgoat root mean square means root of mean of square

caird coinheringaahing

@Mr.Xcoder is that the mathematica builtin for "is this Pyth?"

Leaky Nun

your mean is wrong and you forgot to square

Mr. Xcoder

@Mayube True, but I think you used the debug feature of the herokuapp

@cairdcoinheringaahing No

Mayube

18:18

@Mr.Xcoder of the what-now?

totallyhuman

but i was still right though :P

Mr. Xcoder

@Mayube 🍪

Downgoat

@LeakyNun oh my god i am so stupid I just need to root, mean, then square shit I think the sheeps are getting to my brain i am idiot

Mr. Xcoder

It is also the prime factors of double the input

Mayube

I used TIO, I just tested each character individually with different inputs to figure out what they did

Mr. Xcoder

18:19

@Mayube You already have that cookie

totallyhuman

@Mr.Xcoder different way of saying what i said :P

Mayube

I will treasure it fore-aaand it's gone

Mr. Xcoder

The whole thing is Py, in fact

@totallyhuman Not really

Because t is decrement and h is increment

caird coinheringaahing

@Mr.Xcoder the best flavour of pie is Py

HyperNeutrino

False. It's Pi

Mr. Xcoder

18:22

@cairdcoinheringaahing False. It's 3.1415

Mayube

Y'all are high or smth the best flavour of pie is Cherry

caird coinheringaahing

I really want to get into an argument about mathematical and computational flavours of pie

totallyhuman

false it's Phi

HyperNeutrino

False it's PhiNotPi

Mr. Xcoder

@HyperNeutrino False it's PiNotPhi

And I killed the room again >_<

Conor O'Brien

18:24

@LeakyNun I know you know a lot of languages. How strong is your brainf---?

@Mr.Xcoder Killing a joke tends to do that sometimes

Leaky Nun

@ConorO'Brien for example?

caird coinheringaahing

@Mr.Xcoder I kill it more often.

totallyhuman

10

Q: Hello World socket server

Write the shortest program that answers "Hello, World" to a network connection. Conditions: Program shall listen on port 12345 When a client connects, program shall write "Hello, World" to the newly opened socket connection and then close the connection Program shall accept connections in a lo...

Mr. Xcoder

@cairdcoinheringaahing That I know

totallyhuman

this question was closed years after it was posted o0

Mr. Xcoder

18:25

:))

Conor O'Brien

@LeakyNun for example meaning languages that you know?

HyperNeutrino

:o we summoned PhiNotPi

Leaky Nun

@ConorO'Brien I mean, do you have a task in brainf---?

PhiNotPi

@HyperNeutrino hi

HyperNeutrino

xD

Conor O'Brien

18:25

yeah, I'm basically trying to figure out how to do while(current cell is zero) { asdf }

Mr. Xcoder

@PhiNotPi Look ~15 messages above

caird coinheringaahing

@totallyhuman a question from '08 on SO got closed as a dupe of one from a month ago

PhiNotPi

Yeah I saw.

HyperNeutrino

CMC: Given a string, take the first pair of identical characters where the first character is not at the beginning of the string and then move the character before the first character in the pair and move it to right before the second character in the pair

Test case: PhiNotPi -> PiNotPhi

Java Is Cool -> vaJa Is Cool

Mr. Xcoder

> the first character is not at the beginning of the string

caird coinheringaahing

18:27

New programming language: vaJa

HyperNeutrino

The first character of the pair

"First Pair" is judged by the position of the first character.

caird coinheringaahing

@HyperNeutrino VTC as unclear

Mayube

@ConorO'Brien +[>[<-]asdf] I think

HyperNeutrino

HyperNeutrino -> HyNerpeutrino

@cairdcoinheringaahing how is that not clear

Mr. Xcoder

I VTC too

Mayube

18:28

VTC here

Conor O'Brien

it's crystal clear, unless you are unable to read...

Mayube

oh wait

I get it

VTRO

caird coinheringaahing

it needs a second message = unclear

Conor O'Brien

no, it doesn't...?

HyperNeutrino

CMC: Given a string, find the first character where the character after it occurs more than once in the string, remove it, and move it right in front of the second occurrence of the character immediately following the first character where the character after it occurs more than once in the string.

trichoplax

18:30

For me it took a second reading, but that's true of most challenges I read, so it may not be about the challenge...

HyperNeutrino

There. Even less clear, but more strictly defined.

caird coinheringaahing

Strawpoll

Mayube

take the first pair of identical characters where the first character is not at the beginning of the string, so for PhiNotPi, you ignore the identical Ps, because one is at the beginning, and instead use the identical is. Then take the character before the first i and move it to before the 2nd i

trichoplax

@HyperNeutrino That moves the repeated character, rather than the one before it

HyperNeutrino

no...?

Conor O'Brien

18:30

the most unclear thing about this challenge is the use of the word "word"

Mayube

@HyperNeutrino Java is Cool would be avJa is Cool though

trichoplax

@HyperNeutrino No wait - you're right. But that means it's less clear :P

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

Golf me a memory array This challenge is pretty simple: Your task is to draw a schematic of a (simplified) memory array. You will be given two (positive) integers n,m and the task is to draw the n:2^n decoder connected to the memory array with d data lines. The addressing will be in the order o...

HyperNeutrino

exactly :P

totallyhuman

uhm

trichoplax

18:31

@HyperNeutrino Fair point. I concede

Mayube

@HyperNeutrino and HyperNeutrino would become HyerNpeutrino

Business Cat

Machine code did an image challenge in 13 bytes. Machine code is the new Jelly

trichoplax

Let's not have a mass name changing again...

Conor O'Brien

^

Mayube

Conor O'Brien would become onCor O'Brien

HyperNeutrino

18:33

lol

No HyperNeutrino -> HyNerpeutrino

Conor O'Brien

would you like an encour? :P

Mayube

totallyhuman would become toallyhumtan

HyperNeutrino

Conor O'Brien -> noCor O'Brien

Mayube

@HyperNeutrino no, you said move the character before the first of the pair to before the 2nd of the pair, not vice versa, the P doesn't move

Mr. Xcoder

What would my username become?

HyperNeutrino

18:34

er. XcodMr

Mayube

otherwise PhiNotPi would become PPiNothi`

HyperNeutrino

also assume that the input contains a valid substitution

@Mayube I'm stupid.

Mayube

you're not even following your own rules now

trichoplax

What, no edge cases?

HyperNeutrino

nope xD

Mayube

18:34

Mr. Xcoder becomes r. XcodeMr

HyperNeutrino

> arr! X-code 'em! arr!

Mayube

Business Cat becomes Bsineuss Cat

totallyhuman

wait

trichoplax

Some of us carefully chose a name with no duplicated letters to avoid just such problems

Mayube

likewise

totallyhuman

18:36

i don't know how it works but what would my username be

HyperNeutrino

Dennis becomes Dnenis

Okx

Okx becomes Okx?

HyperNeutrino

@totallyhuman [i'm stupid]

Mayube

@totallyhuman I already said, it becomes toallyhumtan

HyperNeutrino

@Okx Okx is invalid input

Okx

18:36

How dare you say I am invalid‽

2

Mayube

@HyperNeutrino the a pair comes first, not the l pair

Mr. Xcoder

I guess aaa becomes aaa.

HyperNeutrino

yes

totallyhuman

aaa

Mayube

Baa would become aBa

HyperNeutrino

18:37

@Mayube I like how you understand my challenge better than I do

Mayube

That's because I actually read :P

HyperNeutrino

lol

now someone solve it actually xD

totallyhuman

only if i understand it

Mayube

it's like how other people outgolf me in my own language

Business Cat

Random question: What are the chances that if I pick a random 5 digit number, it is the product of exactly 2 primes

Mayube

18:38

@totallyhuman find the first pair of identical characters that does not include the first character in a string, take the character before the first in the pair, and move it to before the 2nd in the pair

@BusinessCat x/89999 where x is the number of 5 digit product of 2 primes there are

trichoplax

@BusinessCat I think that's a brute force question

Mayube

yeah bruteforce is probably the only way to calculate x

trichoplax

Assuming you pick the 5 digit number uniformly from those with no leading zeroes?

Mr. Xcoder

@BusinessCat I'll try to create a Pyth program for that

Business Cat

Yes

Mayube

18:41

what's the largest prime that can be multiplied with another prime to create a 5 digit number?

or better yet, what's the largest prime < 5000?

err wait

HyperNeutrino

< 50000

Mayube

largest prime < 50000?

trichoplax

Try SQRT(99999)

Okx

@Mayube 49999

Mayube

@trichoplax it'll be a lot bigger than that

@Okx is that really prime?

trichoplax

18:42

Rather than checking all the way up to 50000

Okx

yes

it's actually prime lol

Mayube

@trichoplax product of any 2 primes includes 49999 * 2 though

Okx

CMC: Largest prime strictly below X

Mayube

p sure Jelly has a builtin

Conor O'Brien

f=x=>x.split` `.map(e=>i?e:(i=e.match(/(.)(.)(.*)\2(.*)/))?i[3]+i[2]+i[1]+i[2]+i[4]:e,i=0).join` `

Mayube

18:43

05AB1E might too

does Pyth?

Okx

neim has a 1 byte builtin :)

Mr. Xcoder

@Mayube Does pyth what?

Conor O'Brien

98 bytes

Mayube

@Mr.Xcoder have a builtin for largest prime below X

Leaky Nun

@HyperNeutrino Pyth, 31 bytes: Jxm>/[email protected]@ztJ

Mr. Xcoder

18:43

@Mayube Nope

Leaky Nun

@Mayube no

Mr. Xcoder

Ninja'd

totallyhuman

nerp

HyperNeutrino

@LeakyNun nice

trichoplax

@Mayube Excellent point. I'll be quiet now :P

Leaky Nun

18:44

@HyperNeutrino too long

HyperNeutrino

xD

Mayube

@trichoplax How goes preparations for the anthill KOTH?

Mr. Xcoder

@Okx Jelly, 2 bytes: Æp

HyperNeutrino

as long as it's shorter than 1/5 of the python solution, it's not too long xD (:p)

totallyhuman

@Mayube you mean QOTH :P

HyperNeutrino

18:45

@ConorO'Brien nice

Mayube

QOTAH

Okx

"Jelly, bytes" - Jelly is so short you don't even need to say how many bytes

Mayube

Note: It's golfier to say b instead of bytes

Also unnecessary whitespace after the comma

Mr. Xcoder

The fun fact is that I don't know Jelly

trichoplax

@Mayube I need to fix a minor bug with what gets hidden when running with no display for high speed tournaments, and I need to decide whether to leave the food uniformly distributed or make it more clumped. Then unless more bugs get reported it's ready to go

totallyhuman

18:46

hey anybody know of a guide to doing tests for your code?

HyperNeutrino

I have a regex substitution solution for my challenge

totallyhuman

specifically python

Mayube

@Mr.Xcoder Jelly,2b:Æp Outgolfed :D

totallyhuman

i want to learn how to write tests

trichoplax

@totallyhuman I like doctest for simple things - it might be a good place to start

HyperNeutrino

18:46

Whatever type of regex Atom uses:

(.+)(.)(.)(.*)\3(.+) -> $1$3$4$2$3$5

Mayube

> Atom

totallyhuman

yes atom

HyperNeutrino

Text Editor

Mr. Xcoder

@totallyhuman TIO Header: code=""". Footer: """<newline>while True:exec(code)

Mayube

no atom

totallyhuman

18:47

find and replace

why atom

Leaky Nun

@HyperNeutrino Pyth, 25 bytes: A<tMht#xRCMzCMz2XH.DzG@zG

HyperNeutrino

cuz i liek it

^^ nice

totallyhuman

@Mr.Xcoder :P

Mr. Xcoder

@LeakyNun Wooow

Mayube

@HyperNeutrino Vim: :%s/(.+)(.)(.)(.*)\3(.+)/$1$3$4$2$3$5/ ;)

HyperNeutrino

18:47

lol

totallyhuman

@trichoplax oh thanks

Mr. Xcoder

My first Jelly CMC answer, yaaay!

Mayube

I don't like Pyth, it feels too much like what Braingolf could've been if Braingolf wasn't total shit

Leaky Nun

@HyperNeutrino would (.)(.)(.*)\2 -> $2$3$1$2 work?

totallyhuman

lambda s:re.sub(r'(.)(.)(.*)\2',r'\2\3\1\2',s)
import re

HyperNeutrino

18:48

@LeakyNun yup

don't need full matches ;P

CMC: Given a regex find and regex replace, golf the find and replace by removing any groups from the start and end that are not referenced except for in the same order at the start and end of the replace part

Mayube

@HyperNeutrino k let's tone it down a lil sweetie

totallyhuman

lol

HyperNeutrino

xD

Mr. Xcoder

Can't we have a close reason called Acutely boring? Not for any of the CMCs above, just in general

Mayube

CMC: Replace all instances of y in a string with ie

trichoplax

18:52

That's not a close reason, just a downvote reason...

Mayube

yeah boring is way too subjective to be a good close reason

trichoplax

Plus plenty of really exciting challenges get closed - interesting isn't enough to be on topic.

totallyhuman

lambda s:s.replace('y','ie')

i mean...

Mr. Xcoder

@Mayube Pyth, 8 bytes: :Q\y"ie (*-1 thanks to Leaky)

DJMcMayhem

VTC: boring

HyperNeutrino

18:53

^

totallyhuman

^^

Challenger5

Not so fast, I'm doing it in ><>

AdmBorkBork

@DJMcMayhem It'd be cool if that was the actual solution in Vitsy.

Mayube

@Challenger5 knows what's up

Mr. Xcoder

OMG, My Pyth answer is longer than a fifth of the Python one... WHoops

Leaky Nun

18:54

@Mr.Xcoder \y is the same as "y"

Mr. Xcoder

@LeakyNun Didn't know. Thanks!

totallyhuman

,,, (10 minutes from now), 7 bytes: 'y"ie"P

or maybe not P

HyperNeutrino

@totallyhuman Is it just me or are half of the features in ,,, from CMCs? xD

Mr. Xcoder

7 bytes, forgot to edit

totallyhuman

and the other half from challenges lol

anybody have a good unicode character for replace?

HyperNeutrino

18:55

@Mr.Xcoder If it's obviously not golfable any more it's not too long :P

Challenger5

That's my philosophy with foam. When you see a challenge, you say "what built-in would let you solve this elegantly?" and then add that builtin.

Mr. Xcoder

@totallyhuman ®... Markdown... I mean: ®

Good enough?

Mayube

@Challenger5 similar to how I do Braingolf too, although I try to avoid builtins that I think would be too niche

Business Cat

@totallyhuman Ṙ

dzaima

@Mayube SOGL, 6 bytes: y”ie”ŗ

totallyhuman

18:57

c'mon you guys got no graphical ones? :P

Mr. Xcoder

@totallyhuman 

Challenger5

@Mayube I honestly don't care with Foam. The two design philosophies are "unreadable" and "built-in for everything".

Business Cat

@totallyhuman ✎

Mr. Xcoder

§... Like in switch

Mayube

@Challenger5 this is my favourite braingolf example of "Hey if I added this it'd make this challenge way easier"

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