The Nineteenth Byte

ATaco

6:14 AM

Dear Javascript, Why does toString(99) return "[object Undefined]"?

Downgoat

@ATaco what kind of JavaScript are you using

ATaco

NodeJS, but it's consistent on Firefox.

It turns out, toString ignores its arguments, as it's supposed to be indexed from another variable.

Downgoat

@ATaco oh. Well you need to call toString with an object so it knows what is "this"

so answer is bind operator

That said toString global is technically not in spec but is a side effect of globals

so think of it as UD and just use Strinng()

No idea why it's undefined and not Global/Window

Mr. Xcoder

@Downgoat You said I could use a closure to save lots of bytes, but I do not know how. Any suggestions?

Phrancis

6:45 AM

@ASCII-only Is it worth the regex though?

ATaco

It saddens me that (13).toString() is valid and expected.

ASCII-only

7:06 AM

@Phrancis idk, it shouldn't really add that much overhead

@ATaco ... Why

Should numbers not be printable

Also 13..toString() works too

ATaco

@ASCII-only And that is so much better

@ASCII-only That's why languages like Lua have a global tostring, because numbers aren't supposed to be indexed.

Ian H.

Uhmm, for markdown in questions/answers, whats the syntax for writing a number "down"? Like, the inverse equivalent of X?

ATaco

X maybe..?

Yeah, x seems to work.

Ian H.

Ah yeah, that makes alot of sense

More than stuff like sdown sfloor or stuff I tried

ATaco

super script and sub script

Ian H.

7:17 AM

Thank you :)

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

Can you generate this random sequence for me? Inspired by this question on Retrocomputing I want to create a random generator that always returns a desired word. I desperately need this so I can hide some easter eggs. For science easter! Input A word, either in string format or an array or ve...

New Main Posts

2

Q: Additional facts!

In mathematics, the factorial, shortened "fact" of a non-negative integer n, denoted by n!, is the product of all positive integers less than or equal to n. For example, 5! is 1 * 2 * 3 * 4 * 5 = 120 The factorial of 0 is 1, according to the convention for an empty product. These are the regu...

Leaky Nun

7:33 AM

> A, B, C sind mit ablautendem D, E Ableitungen mit Dentalsuffix von der unter F angegebenen Wurzel G in der Bedeutung H.

I'm having trouble translating this sentence

wizzwizz4

7:46 AM

> Dentalsuffix

Leaky Nun

@wizzwizz4 referring to -t and -d

wizzwizz4

Ah. That makes more sense.

Leaky Nun

After a bit of thinking:

> A, B, C are derivatives with dental suffix from the root G in the sense H specified under F, along with the ablauting D, E.

@MartinEnder @Dennis maybe you can help me

@wizzwizz4 do you speak German?

wizzwizz4

@LeakyNun Not much.

That looks right in terms of structure - I don't know the nouns but I think it's right.

Wait... Dennis speaks German? TIL.

Leaky Nun

@wizzwizz4 thanks

German sentence, too complicated

Mr. Xcoder

8:07 AM

@LeakyNun I know a bit of German too, and that seems right.

Leaky Nun

@Mr.Xcoder thanks

Anonymous

@LeakyNun The German.SE general chatroom can probably help you out.

Husnain Raza

@HyperNeutrino this paper might help for the OEIS thing cms.math.ca/openaccess/cjm/v16/cjm1964v16.0310-0314.pdf

They calculate small values

Martin Ender

8:19 AM

@LeakyNun looks about right

Leaky Nun

@MartinEnder thanks

it's too complicated

Martin Ender

I had to read it a few times to parse it as well. (although it doesn't help that I don't know what half the words mean)

Leaky Nun

@MartinEnder half the words?

49 mins ago, by Leaky Nun

> A, B, C sind mit ablautendem D, E Ableitungen mit Dentalsuffix von der unter F angegebenen Wurzel G in der Bedeutung H.

you likely don't know only ablautendem and Dentalsuffix...

wizzwizz4

"angegebenen" "Ableitungen"

Leaky Nun

@wizzwizz4 oh, those aren't common words?

Martin Ender

8:26 AM

@LeakyNun the meaning of "Ableitungen" tends to depend a lot on context, and all the placeholders don't help either. also in terms of semantics I'm pretty sure that "ablautend" and "Dentalsuffix" contain half the content of that sentence :P

wizzwizz4

@LeakyNun I haven't seen "angegebenen" before and "Ableitungen" doesn't have a lot of meaning.

Leaky Nun

@MartinEnder well, alright

@MartinEnder @wizzwizz4 it's from here

New Main Posts

0

Q: Leetcode 221 Largest square in matrix

I am having trouble understanding why this solution works for leetcode problem number 221. The runtime for this solution is O(MN). I've been reading this solution and running it through my interpreter but I am still confused. Specifically, what is confusing me the most are all the k variables. It...

matrix python

Erik the Outgolfer

8:59 AM

@flawr umm...that's not deleted? btw I voted to delete that because it was seemingly too low-quality or something...

ASCII-only

9:23 AM

@ATaco >_> JS doesn't believe in spamming globals and neither do I

@ATaco i know right

@wizzwizz4 Dennis is German

New Meta Posts

9:51 AM

1

Q: Site icons being messed up

I just noticed that PPCG now has Code Review's icon in some areas of SE. I'm pretty sure this is a bug since I can't find any discussion related to it. Basically the problem seems to appear wherever the site sprite sheet is used. Looking closer, it seems that every site's icon is off by two (one...

bug

wizzwizz4

10:04 AM

@ASCII-only That doesn't mean he has to know the language. :-P

Unless you're saying that he is the language?

ASCII-only

@wizzwizz4 well Dennis was born in Germany IIRC so I'd expect him to know it (also I've seen him talk in german here)

wizzwizz4

> If at first you don't succeed, try:, except:, pass.

How do you halve an integer using only +, - and conditional jumps?

Leaky Nun

> Es gibt zahlreiche Versuche, die unterschiedlichen Formen des Westgerm. , Got. und Nord. miteinander zu verbinden, eine einheitliche germ. Grundform konnte jedoch nicht mit Sicherheit erschlossen werden

the structure got me again

wizzwizz4

deutschsprachiger Raum

General discussion for german.stackexchange.com. You may speak...

1

> You may speak...

Leaky Nun

@wizzwizz4 nah, too inactive

ASCII-only

10:15 AM

@wizzwizz4 even integer? or can it be odd

result = 0
while input:
    input -= 2
    result += 1

wizzwizz4

@ASCII-only Let's assume that it's even.

@ASCII-only I need a relatively fast algorithm.

ASCII-only

oh then i'd do it with binary

@wizzwizz4 what is the maximum number

Leaky Nun

@wizzwizz4 you can't if you only have + and -

ASCII-only

@LeakyNun why not (btw he has conditional jumps too)

Shaggy

'Lo, all.

wizzwizz4

10:17 AM

@ASCII-only 8000

Leaky Nun

@wizzwizz4 define conditional jump

Pietu1998

result = input
while result + result - input:
    result -= 1

wizzwizz4

@LeakyNun Jump if zero, non-zero, equal and less than.

Leaky Nun

@wizzwizz4 ok

ASCII-only

oh good lol

def halve(number):
    result = 0
    if 4095 < number:
        number -= 4096
        result += 2048
    if 2047 < number:
        number -= 2048
        result += 1024
    if 1023 < number:
        number -= 1024
        result += 512
    if 511 < number:
        number -= 512
        result += 256
    if 255 < number:
        number -= 256
        result += 128
    if 127 < number:
        number -= 128
        result += 64
    if 63 < number:
        number -= 64
        result += 32
    if 31 < number:

@wizzwizz4 this should do it in log(n) time I think?

Leaky Nun

10:22 AM

res = 0
while input:
	a,b,c = 1,2,4
	while c<input:
		a = b
		b = c
		c += c
	input -= b
	res += a

TIO

@wizzwizz4

wizzwizz4

@ASCII-only Wow. Why didn't I think of that? :-) Thanks.

ASCII-only

@wizzwizz4 Wait @LeakyNun has a way shorter method that should work too

wizzwizz4

I actually think I can golf that by exploiting the values of the numbers.

@LeakyNun That's even better. Thanks.

Shaggy

4

A: Sandbox for Proposed Challenges

Coat of Many Colours code-golf array-manipulation Sandbox Anything not clear enough? Tag suggestions? Suggestions for test cases? Is it close enough to this to be considered a dupe? I need a better song title! It doesn't necessarily need to be from Joseph. I'm an idiot! Sho...

Want to try and get this posted soon.

Need to get the questions answered first. The last one, in particular.

Mr. Xcoder

Taking a look rn

Leaky Nun

10:33 AM

@Mr.Xcoder can you help me?

Mr. Xcoder

@LeakyNun With what?

Leaky Nun

@Mr.Xcoder wait, I think I figured it out

> Es gibt zahlreiche Versuche, die unterschiedlichen Formen des Westgerm. , Got. und Nord. miteinander zu verbinden, eine einheitliche germ. Grundform konnte jedoch nicht mit Sicherheit erschlossen werden

Mr. Xcoder

Wait a tiny bit

Leaky Nun

There are numerous attempts to connect the difference among the West Germanic, Gothic, and Norse forms; nevertheless, a united Proto-Germanic base form could not be constructed with certainty.

Mr. Xcoder

There are words I never encountered so far

@LeakyNun Es gibt zahlreiche Versuche means "There have been many attempts to"

Which is correct

Leaky Nun

10:38 AM

@Mr.Xcoder what is the difference?

wizzwizz4

@LeakyNun Conjugation error.

Ninja'd.

@wizzwizz4 where?

About none.

It's just the tense.

I am talking for myself now, trying to make my own translation and then comparing it to yours

> There have been many attempts to link the different forms between West, Gothic and Norse German all together.

I have this ^

wizzwizz4

10:43 AM

TIL that I have a user on my computer called DeleteMe.

This user is running several important services.

Leaky Nun

@Mr.Xcoder wow, thansk

Mr. Xcoder

@LeakyNun The The second part is identical in my try too

Leaky Nun

a note though, it's West Germanic, Gothic, and Norse.

Mr. Xcoder

@LeakyNun Yeah, My mistake.

Leaky Nun

would you prefer "constructed" or "developed", for erschlossen?

New Sandboxed Posts

10:45 AM

0

A: Sandbox for Proposed Challenges

A Room Of Mirrors code-golf ascii-art (This challenge seems similar, but the task is designed differently.) Imagine a 2-dimensional room, where the walls are plated with flat mirrors. Suddenly, a beam of light strikes into the room, where a piece of wall is missing! The lightbeam dances a...

Mr. Xcoder

@LeakyNun Hm, yeah

It can mean either developed or open, so I think developed is the right term here indeed

@LeakyNun I don't know if I will ever contribute to anything though :P

Leaky Nun

@Mr.Xcoder ok thanks

New Main Posts

0

Q: Ascii User Interfaces

In this challenge, we render Ascii user interfaces. +----------------------+ |+-----------++-------+| ||<- Previous||Next ->|| |+-----------++-------+| |== The title == | | | |Lorem ipsum dolor | |sit amet... | |+--------------+ | ||Post a comment| ...

code-golf ascii

Mr. Xcoder

Ping if there is anything else I can help you with

@NewMainPosts Faster than usual

wizzwizz4

@Mr.Xcoder If you post at nn:n9, NewMainPosts will be almost instant.

It runs every 10 minutes.

Mr. Xcoder

10:51 AM

I know, it's just a common meme to talk about the NewMainPosts Feed here on PPCG

Lol, I just saved this room.

wizzwizz4

@Mr.Xcoder It'd have been deiced later.

Possibly with a sledgehammer, but maybe to cool down some servers.

Adám

CMC: Given a matrix, return the element of the biggest submatrix that has identical elements. If multiple have equal area, return any or all.

Mr. Xcoder

> return the element?

Adám

@Mr.Xcoder Yup.

aaa
abb

Mr. Xcoder

@Adám What do you mean by return the element. Like [[2,3,4],[3,3,3],[2,2,2]] -> 3?

Adám

11:00 AM

return a

@Mr.Xcoder yes, or 2 or [2,3]

Leaky Nun

@Mr.Xcoder here's where I used the text we translated

Mr. Xcoder

@Adám Why b?

@LeakyNun Aha, cool

Adám

@Mr.Xcoder The 1×3 submatrix which is filled with as is the biggest submatrix

Leaky Nun

@Adám what about the 1x3 submatrix with a?

Mr. Xcoder

Ok

Adám

11:02 AM

@LeakyNun Retconned.

Mr. Xcoder

@Adám That's what I was talking about

@Adám What about the 1x3 one?

Leaky Nun

55 secs ago, by Leaky Nun

@Adám what about the 1x3 submatrix with a?

Mr. Xcoder

@LeakyNun He had sth in between: 1x2 with as :D

Adám

History revision galore!

Mr. Xcoder

@LeakyNun Maybe you can help me with smth now... Remember our discussion about lens and optics a while ago?

Leaky Nun

11:04 AM

I don't

Mr. Xcoder

Jun 17 at 18:53, by Leaky Nun

1/u + 1/v = 1/f
1/f + 1/v = 1/f
1/v = 0
v = infty

Jun 17 at 18:53, by Mr. Xcoder

What happens when you place an object at the focal point of convergent lens

Leaky Nun

ok

Mr. Xcoder

Do you remember now?

After we had that discussion, I thought about what would happen if the lens had a focal length of 0. I don't really know if f=0 is relevant, because then C would be 1/f, which would be ∞ δ.

Could, in theory, exist a lens with f=0?

Or maybe it is not physically meaningful...

totallyhuman

hi

Mr. Xcoder

@totallyhuman Hi

@LeakyNun Forget about what I said above. I figured it is a non-sense.

Leaky Nun

11:20 AM

@isaacg please go to the pyth room.

flawr

Do we have a standard for how black-box-functions have to be provided to submissions?

Anonymous

@flawr The advice is usually "don't do that" :P

flawr

I have a few challenge ideas that involve the manipulation of functions as black boxes, but that seems to be a bad idea if we do not have a standard way for all those types of languages.

@Mego unfortunately :/

Anonymous

It's one of the cases where golfing languages (and other esolangs) lack features of traditional languages that causes them to be unable to compete

flawr

But I think were missing out on so many opportunities. Would it makes sense to restrict those kind of challenges to languages that have functions or functional capabilities?

Anonymous

11:28 AM

It would make sense, but I don't know if it's a good idea to try it or not

Anonymous

Historically, challenges that require languages to have a certain feature or capability have been begrudgingly accepted at best

Erik the Outgolfer

wait don't some golfing languages support black boxes?

e.g. pyth

Anonymous

@EriktheOutgolfer Some do, others don't

flawr

I don't think anybody said, that, but many do not.

Anonymous

I misread "golfing languages" as "esoteric languages"

Erik the Outgolfer

11:31 AM

well, there are also languages like golfscript or cjam which have "code block" objects

e.g. {)2*} would push a code block which when eval'd will compute (x + 1) * 2

and others have strings, e.g. 05ab1e

so not really sure where is the line between black boxes and strings

flawr

What if we make a meta post for defining the input of "black boxes" for each language?

Or perhaps I should just make an easy challenge as a precedence case.

Anonymous

@flawr I think adding black box-focused answers to the default I/O methods post would be better

Erik the Outgolfer

and then there's jelly which stores "helper links" as named functions (their name is their 1-based line index)

flawr

@Mego ah right, forgot about that!

but that would require basically one answer per langauge

Erik the Outgolfer

@Mego you mean doing i/o with function objects or something?

Anonymous

11:34 AM

@flawr Not necessarily. A lot of the individual methods could be grouped into general methods.

Anonymous

@EriktheOutgolfer Yes

flawr

But would it hurt to have a separate thread for functional IO?

Erik the Outgolfer

but then for example 05ab1e has the .V command which evals a string as 05ab1e code

flawr

I think that has a lot more intricacies than just the "usual" IO

Erik the Outgolfer

so one could say that a string would define an 05ab1e function or something...?

flawr

11:41 AM

I don't have any experience in that particular language

@Mego Can you make an example? I have difficulties to word it.

Mr. Xcoder

CMC: Given a list of positive integers, output the ones with the highest delta (there will only be one pair with maximum delta)

flawr

Oh, why not explicitly listing langauges .

Mr. Xcoder

[1, 3, 5, 9, 2, 17] -> deltas: [2,2,4,-7,15] -> [2, 17]

Pietu1998

I think allowing stuff such as strings or code blocks as functions is just fine, as long as the code doesn't attempt to process it but just runs it. Really, you can also get the source of function objects in JS, get the machine code of functions in C/C++/Assembly/whatever, and so on for other languages

flawr

@Pietu1998 That is a good point!

As an example: Would you allow that languages that have functions can assume that the black box is a predeefined function f even if they have functional capabilities (I.e. pass functions as arguments)

Mr. Xcoder

11:48 AM

@Mr. Xcoder Pyth, 18 bytes: Kx.+QeS.+Q,@QK@QhK.

trichoplax

@StepHen um, thanks...

Mr. Xcoder

@Mr. Xcoder Pyth, 17 bytes: ,@QKx.+QeS.+Q@QhK

@EriktheOutgolfer Can you golf the above further?

Wait, I think I can

Erik the Outgolfer

@Mr.Xcoder 10 bytes

Mr. Xcoder

16 bytes: ,@QKxJ.+QeSJ@QhK

@EriktheOutgolfer Working on that, well done :}

Erik the Outgolfer

and 9 bytes by not assuming there will be only one pair

Mr. Xcoder

11:55 AM

@EriktheOutgolfer How can that possibly be shorter?

Erik the Outgolfer

you mean yours?

Mr. Xcoder

@EriktheOutgolfer No

Yours

Erik the Outgolfer

oh mine is here

Mr. Xcoder

@EriktheOutgolfer Nonono... How can It be shorter by not assuming something?!

Erik the Outgolfer

well by not assuming something like that you have an excuse for your output format instead of adding a byte to compensate

or do I have to assume that?

Mr. Xcoder

11:58 AM

@EriktheOutgolfer No, do it as you wish

Erik the Outgolfer

yeah mine is to the link I posted

Mr. Xcoder

@EriktheOutgolfer I don't wanna look at it

Erik the Outgolfer

and that's why I didn't post that verbatim

want a hint or something to get to my 9 bytes?

Mr. Xcoder

@EriktheOutgolfer No thanks

Erik the Outgolfer

ok then

Anonymous

12:02 PM

@flawr I don't see why not. We usually don't forbid the use of I/O methods depending on which methods a language has available.

Mr. Xcoder

@EriktheOutgolfer I have 11 bytes

Erik the Outgolfer

2 more to go

> We are currently offline for maintenance

Mr. Xcoder

@EriktheOutgolfer What does your 9-byte assume?

Erik the Outgolfer

waaaat?

Mr. Xcoder

nested lists?

Erik the Outgolfer

12:11 PM

yeah

Mr. Xcoder

Good, cuz I had this: .n.M.+Z.:Q2

So it's just .M.+Z.:Q2

Or s.M.+Z.:Q2 for the first one actually

Erik the Outgolfer

yeah

New Main Posts

0

Q: Where's my value?

My boss now wants me to implement a mechanism that lets him search for an item in an array, and gives him the index/indices where that value occurs. Your Task: Write a program or function that receives an array and a value (String, Integer, Float, or Boolean), and returns the indices of the a...

code-golf array-manipulation

Pietu1998

12:23 PM

Adám

@Pietu1998 !

flawr

12:44 PM

@Mego Good, I'll try to write a proposal for the default IO, and I'll let you know as soon as I submit it.

New Main Posts

-4

Q: Implement Faulty MD5

Implement the MD5 hashing function, which passes the following test cases: MD5f("") = d41d8cd98f00b204e9800998ecf8427e MD5f("hello") = 5d41402abc4b2a76b9719d911017c592 MD5f("123456789") = 25f9e794323b453885f5181f1b624d0b but fails on this one: MD5f("faulty") != c4ef1e7ec5c765839c8acdd9968542b...

function hashing

totallyhuman

Code golf silver!

Mr. Xcoder

1:00 PM

I outgolfed EriktheOutgolfer :)

@totallyhuman Congrats!

flawr

I've been waiting so long for this moment:

@flawr Haha

Nice

unfortunately it is not +22

Mr. Xcoder

1:02 PM

@flawr Lol

4

A: Where's my value?

Jelly, 3 bytes ⁼€T Try it online! -1 thanks to Mr. Xcoder. (dyadic chains)

Here ^

flawr

Did you see the 2 bytes MATL answer? :)

AdmBorkBork

@flawr Nice.

Mr. Xcoder

@flawr Mine is also two bytes, in Pyth

flawr

@Mr.Xcoder Oh right, virtual internet high ~~five~~ two :D

Mr. Xcoder

@flawr 🙌🏼

@flawr I messed up that cute run of 2s :)

totallyhuman

1:06 PM

Hrmm somebody answer that challenge in retina already

AdmBorkBork

Only 7 hours left on the TryItOnquine bounty.

Mr. Xcoder

@AdmBorkBork I doubt someone else will answer :}{:

</emojifail>

AdmBorkBork

pls don't multiple ping like that

Mr. Xcoder

Sorry, emoji-fail

I didn't mean to disturb

totallyhuman

It's stupid cause an edit re pings

AdmBorkBork

1:08 PM

Right

I had clicked to acknowledge, reping, click, reping, click .... OK, we're good. lol

Mr. Xcoder

In my case it would be: Ping, Desktop not., click, click, exit tab, ping, desktop not., click, click, exit tab, ping, desktop not, click, click, exit...

totallyhuman

@AdmBorkBork is there a bubblegum answer and if not, is it possible?

AdmBorkBork

@totallyhuman I'm sure it's possible? Does Bubblegum have zlib and base64 compression?

I mean, there's a PowerShell answer of all things, so I'm sure that any language should be possible.

Mr. Xcoder

Hmm, that challenge is extremely hard in Swift....

AdmBorkBork

2:01 PM

OEIS is so weird

> Number of positions in which n semi-queens may be placed on an n X n toroidal board, with only one semi-queen attacking another semi-queen; also, number of interval method wirings for a cryptographic rotor for even n.

A024915

New Meta Posts

2:13 PM

0

Q: Do we need leaderboards on all challenges?

I noticed a bunch of edits showing up in the edits queue where the usual javascript leaderboard is added to challenges. Example Example I think the leaderboards are fine, but do we really need to add these to challenges that have been inactive for quite some while?

discussion

Mr. Xcoder

2:25 PM

@AdmBorkBork And OEIS does not have a sequence like product of the sum of even and odd digits.

Wheat Wizard

2:49 PM

@StepHen Why'd you tag my robber's thread with code-golf?

New Main Posts

5

Q: Seeking Secret Swapping Sequences

This is a cops-and-robbers challenge, the robbers thread can be found here. Your task is to write some code that outputs an OEIS sequence, and contains the name of the sequence in the code (A______) and outputs a second separate sequence when the name of the sequence in the code is changed t...

code-golf sequence cops-and-robbers

2

Q: Solving Secret Swapping Sequences

This is a cops-and-robbers challenge, the cops thread can be found here. This is the robbers thread, your job here is to take submissions on the cops thread and try to find the hidden sequences. If you find any sequence that can be substituted into the original code to compute that sequence...

sequence cops-and-robbers

Riker

RIP SO Docs

Bruce Forte

@WheatWizard You should do a swapping sequences series where you need to maximize the number of working solutions. eg. set score to sth. like #bytes/#sequences

Wheat Wizard

I thought about that. I just haven't had the time to work out a scoring system I think is fair

#bytes/#sequences probably wouldn't be the best.

Bruce Forte

3:05 PM

How so?

Also maybe restrict the sequences in a way that they shouldn't be adjacent (just so you can't copy Neil's or my answer from the original one)

Otherwise it could get killed as a dupe

Step Hen

@WheatWizard oh right >.< forgot only the cops golf

Wheat Wizard

Based on some playing around I did it seems to me that the best strategy was to just do 2 sequences.

Neils answer is pretty good regardless. I would expect it to score quite well in any version of the challenge

I think constant sequences should be outlawed though

That was my main regret for the first iteration

Jordan

Anyone here proficient at golfing in befunge? I've been wanting to get into it; just looking for tips.

Wheat Wizard

Have you read the tips question?

Jordan

Yep, a few times over

New Main Posts

3:10 PM

2

Q: Can even numbers become prime?

The Sequence Everyone knows the only even prime number is 2. Ho-hum. But, there are certain even numbers n where, when concatenated with n-1, they become a prime number. For starters, 1 isn't in the list, because 10 isn't prime. Similarly with 2 (21), and 3 (32). However, 4 works because 43 is ...

code-golf sequence arithmetic primes

1

Q: Print all possible permutations

You will be given an integer n, and you must print all permutations upto and including size n based on the alphabet {0, 1}, in the following format: n = 0 print {} n = 1 print {0, 1} n = 2 print {0, 1, 00, 01, 10, 11} n = 3 print {0, 1, 00, 01, 10, 11, 000, 001, 010, 011, 100, 110, 101, 1...

code-golf code-challenge permutations binary

Step Hen

@Jordan browse this, if you have the time

@Jordan some of the stuff in that is not relevant, but some of it is

Jordan

@StepHen Ah thanks! Didn't know you could search like that. and believe me, I have time, I'm at work and all I've been doing for the past 2 weeks is testing

LiefdeWen

3:26 PM

If I have written a language and I have the code in a public repo and an online interpreter can I start answering challenges in it?

DJMcMayhem

@LiefdeWen Absolutely!

5

Q: What's required for me to use my own language?

I recently "finished" my own BrainFuck variant (ezfuck), and wanted to try using it for golfing. Assuming the version of the language I'm using predates the challenge, are there any other restrictions? On the Github page, I supplied a .jar that starts a REPL capable of running code. A jar cou...

discussion

LiefdeWen

@DJMcMayhem Thank you :)

Business Cat

I've been doing it for a little while myself so it's prefectly fine

Step Hen

@LiefdeWen as long as it can add and do primality (and maybe even if it can't)

AdmBorkBork

Ah, it's been a while since I used my hammer.

Step Hen

3:35 PM

@AdmBorkBork it's different though

Jordan

If I had a hammer!

Step Hen

@AdmBorkBork this one gets permutations of all lengths, that one did just the input length

AdmBorkBork

Minorly differently, imo

If you disagree, go ahead and vote to reopen. That's the purpose of voting.

Step Hen

@AdmBorkBork yup I did, you're right that it's minor, community can decide

flawr

3:48 PM

@Riker plz melt chat.stackexchange.com/rooms/43239/le-dix-neuvieme-byte

orlp

anyone here wants a free code golf challenge idea?

given three circles as (centre_x, centre_y, radius)

give (a, b) from the colinear intersection (blue line) of those three circles as y = ax + b

flawr

I have the impression that you can get pretty bad accuracy when using floating points here.

orlp

obviously r1 != r2 != r3

flawr

and r1 != r3 :)

orlp

4:03 PM

@flawr a more golfy way of saying this would be to say it's guaranteed r1 < r2 < r3

saves that last statement :)

totallyhuman

no it isnt a dup — K Split X 1 hour ago

™

flawr

I just thought about the consequences if != was transitive XD

wizzwizz4

@uhoh: "Mark 1 eyeball". Original equipment, from the factory, no aftermarket modifications, no external additions. — John R. Strohm yesterday

totallyhuman

anybody havin issues with TIO?

wizzwizz4

I knew babies came from the factory! :-)

@totallyhuman The backend servers are down.

totallyhuman

4:10 PM

ah

thanks

Business Cat

Is TIO not working properly for anyone else?

HyperNeutrino

2 mins ago, by wizzwizz4

@totallyhuman The backend servers are down.

@WheatWizard hastebin.com/ukuputocut.txt

totallyhuman

@BusinessCat two messages back, c'mon :P

Business Cat

Oh I should probably read instead of being blind

trichoplax

There's an address you can send more money to for better servers

totallyhuman

4:16 PM

what if you're a broke teenager? ㅕ

trichoplax

You get to use it free, just like everyone else :)

wizzwizz4

4:50 PM

@BusinessCat Double ninja'd.

Wheat Wizard

5

Q: Finding n'th character in a Lucky String

Lucky numbers are those numbers which contain only "4" and/or "5". For example 4, 5, 44, 54,55,444 are lucky numbers while 457, 987 ,154 are not. Lucky number sequence is one in which all lucky numbers exist in increasing order for example 4,5,44,45,54,55,444,445,454,455... Now we concate...