The Nineteenth Byte

New Posts

13:16

0

Following the theme of strange kitchen appliances, let's talk about my microwave. Introduction My microwave has a keypad that is laid out like this: 30 > 15 1 2 3 4 5 6 7 8 9 +/- 0 S/M I can press the +/- and S/M keys to switch between adding and subtracting minutes or seconds. Th...

code-golf

GingerIndustries

you know

If I had a nickel for every time someone made a CGSE post about strange kitchen applicances, I would have 2 nickels

It's not a lot, but it's weird that it happened twice

Adám

@GingerIndustries There's also

18

Q: Generate lazy microwave input

Related: Program my microwave oven and Generate lazy values. My colleague is so lazy that he doesn't even bother to move his finger when programming the microwave oven. (This is actually true!) Help him find the microwave input that gives the time closest to what he wants, but where all digits ...

code-golf number date

GingerIndustries

@Adám okay so 3 nickels

@Adám That's 15 whole cents! this could maybe be profitable

Adám

@GingerIndustries Hey, I linked to another (closed) one.

GingerIndustries

@Adám 4 nickels?

Adám

13:20

Maybe time for a microwave?

GingerIndustries

@Adám yes, that is an excellent idea

Adám

cooking.stackexchange.com/tags/microwave/info

GingerIndustries

@Adám it has been done

@Adám what shold the tag wiki say

*should

Adám

Just to be clear: I was just joking.

There's no benefit of having that tag over a simple search

lyxal

@Adám no, you were Adám

Get it right

smh

GingerIndustries

13:33

@Adám ¯_(ツ)_/¯

Adám

@GingerIndustries Here, you dropped this: \

lyxal

proceeds to steal dropped limb

GingerIndustries

@Adám I did include that

@Adám ¯_(ツ)_/¯

Adám

@GingerIndustries You need to double it to escape markdown.

GingerIndustries

@Adám ofc, 2 limbs are better than 1

Adám

13:35

Otherwise \ is consumed to prevent _ from making italics.

GingerIndustries

¯\_(ツ)_/¯

lyxal

E.g \\o -> \o

GingerIndustries

there we go

lyxal

@lyxal hmm thought that would have worked

Anyhow o/ for real

GingerIndustries

\\\\\\\\o

the technical term for this is recursive backslashescapification

Adám

13:42

CMC: Given a printable ASCII text, insert a backslash in front of every character which is neither a letter, nor a digit.

pxeger

@Adám JavaScript, 31 bytes: s=>s.replace(/_|\W/g,x=>"\\"+x)

GingerIndustries

hm

lemme do some python

Adám

@pxeger Can you not do _|\W?

pxeger

ah, didn't think of using something other than a [] character class lol

Adám

Test case: 7\_('o')_/F → 7\\\_$\'o\'$\_\/F

'_|\W'⎕R'\\&' in APL, which means that in QuadR it is:

_|\W
\\&

Aaroneous Miller

13:48

@Adám can we assume input does not contain newlines?

Adám

Yes, as those are not printable ASCII.

Aaroneous Miller

oic

@Adám Vim, 16 bytes: :s/_\|\W/\\\0/g

PyGamer0

pxeger

super cool image of the entirety of IPv4

GingerIndustries

@pxeger Python 3 w/o regex

@pxeger whoops, wrong person

pxeger

13:53

@pxeger Ford could make a lot of money selling 19/8

Alan Bagel

@PyGamer0 ooh

GingerIndustries

@Adám Python 3 w/o regex: lambda s: "".join([x if x in string.ascii_letters+string.digits else "\\"+x for x in s])

@Adám does need the string module to be imported

pxeger

@GingerIndustries you can remove the spaces between the "s and their neighbouring characters

@GingerIndustries imports typically need to be included in the byte count

GingerIndustries

@pxeger okay. Byte count (including imports): 100 bytes lambda s:"".join([x if x in string.ascii_letters+string.digits else "\\"+x for x in s])

pxeger

@Adám Python, 49 bytes lambda s:"".join("\\"*(1-c.isalnum())+c for c in s)

Alan Bagel

13:56

@PyGamer0 what site is that

GingerIndustries

regex is hard and confusing

PyGamer0

@AlanBagel cgcc

Alan Bagel

welp now it's 676

PyGamer0

@AlanBagel noooooo

wait if someone upvotes

twice

696

GingerIndustries

@PyGamer0 well then

pxeger

14:01

@pxeger byte count is wrong. And also -1 byte (making 50, in fact): lambda s:"".join("\\"*-~-c.isalnum()+c for c in s)

Alan Bagel

@pxeger uh what does -~- do

GingerIndustries

magic

Alan Bagel

I think it means negate, minus one and negate, and negate again

Razetime

bitwise negation of an integer gives -(n-1)

Alan Bagel

@Razetime so it's negate, minus one and negate, and negate again

pxeger

14:05

-~-x is the same as (1-x) which is the same as (not x) (for booleans)

Alan Bagel

It seems to give -(n+1)

Razetime

oh yeah

-(n+1)

Alan Bagel

I mean -(n-1)

PyGamer0

@pxeger can you give a table of all ~- combinations??

Alan Bagel

yeah that would be great

GingerIndustries

14:07

challenge: Given a string of characters consisting of either "^" or "v", return net SE reputation if ^ represents an upvote and v a downvote (from the perspective of the person being voted on)

pxeger

@PyGamer0 the only really useful ones are ~ (-1-x), -~- (1-x), -~ (x+1), and ~- (x-1)

any more than that and it's better to use parens

Razetime

-~ is very very commonly used to increment number without modifying it

Alan Bagel

@GingerIndustries is the starting rep 0 or 1

pxeger

@GingerIndustries so 1 + (10 * number of ^s) - (2 * number of vs)?

GingerIndustries

@AlanBagel we'll say 1

@pxeger yes

Alan Bagel

14:10

lambda s:1+(10*s.count("^"))-2*s.count("v")

PyGamer0

@pxeger thanks!

pxeger

@PyGamer0 also x-~y = x+y+1 and x+~y = x-y-1

Alan Bagel

how about lambda s:10*s.count("^")-2*s.count("v")+1

GingerIndustries

let's see if I can write a solution in KonamiCode

Alan Bagel

I think lambda s:10*s.count("^")-2*s.count("v")+1 is the shortest possible in python. Also lambda s,c=str.count:10*c(s,"^")-2*c(s,"v")+1 for 45 bytes.

Any feedback on codegolf.meta.stackexchange.com/questions/2140/…?

PyGamer0

14:22

flax: feedback

^ @RedwolfPrograms

Redwolf Programs

Morning!

PyGamer0

oh cool

my ping summoned him lol

@RedwolfPrograms o/

Redwolf Programs

No new feedback

pxeger

My golfing language has two special objects, wildcard and undefined. wildcard == x always returns true; undefined == x always returns false (even undefined == undefined). What should wildcard == undefined return?

PyGamer0

@RedwolfPrograms ok

Redwolf Programs

14:27

@pxeger One should take precedence, most likely

Aaroneous Miller

@pxeger DivideByZeroError

Redwolf Programs

Although this sounds like an odd and rarely useful concept for a golfing language feature

PyGamer0

@pxeger wilddefined

uncard

caird

pxeger

@RedwolfPrograms the idea is to simplify edge-case handling but maybe it's not really useful

Alan Bagel

@pxeger WildinedError

Aaroneous Miller

14:29

@pxeger It should return true or false depending on if it's wildcard == undefined or undefined == wildcard

pxeger

at the moment it takes the behaviour whichever is on the left hand side

but I feel like I shouldn't break =='s commutativity like that

Redwolf Programs

undefined should take precedence

pxeger

do you think undefined != undefined will break things, too?

Redwolf Programs

> simplify edge-case handling

pxeger

lol

good point

Well I'll add them, and if it turns out noone ever uses them or they break too many things, I can just remove them

thejonymyster

14:37

i had a question, i kind of think i answered it on my own, but i kind of still want you guyses opinionses

Redwolf Programs

About to check my PSAT score

thejonymyster

ooh good luck

or,well, hope you already had good luck

pxeger

@thejonymyster guyses is a good word lol

@thejonymyster I was gonna say, that's not much use now lol

thejonymyster

i grew up in the mobs, see

Redwolf Programs

@pxeger Don't you know test scores are both passing and failing at once until you look at them?

4

pxeger

14:39

@RedwolfPrograms I mean, that statement can't be disproven...

thejonymyster

so, question: for a question that takes no input, would it be allowed to take a constant input, adding those bytes to your total?

pxeger

I doubt it, tbh

Redwolf Programs

I'd say no, but I could see there being some old rule allowing it

Sort of like using the file name

thejonymyster

right except i think the difference is like

filename is part of your program, while input is not

Redwolf Programs

1470/1520 :/

PyGamer0

14:41

@RedwolfPrograms whats PSAT?

thejonymyster

practice SAT

pxeger

@RedwolfPrograms I don't really have a reference point on how good that is, as a brit; what were you hoping for?

PyGamer0

@RedwolfPrograms at least better than 1469

Redwolf Programs

@pxeger Perfect score :p

thejonymyster

maybe its golf

pxeger

14:42

@RedwolfPrograms lol

Redwolf Programs

1470 is pretty good, it means I missed five questions

PyGamer0

what is
SAT?

Redwolf Programs

A standardized test you use to get into college

thejonymyster

some acronym test

pxeger

@RedwolfPrograms so do you get 10 points for each? Why don't they just divide everything by 10?

Redwolf Programs

14:43

@pxeger Because giving people useful scores is not what college board likes

The more arbitrary your score seems, the more profit they make

3

thejonymyster

dont want to interrupt but i am at my job and for a good, i dunno, five whole seconds, i completely forgot how to do it

3

i was just sitting here at my desk like. shit dude

pxeger

you ok there? lol

thejonymyster

uhh probably LOL

PyGamer0

lol

thejonymyster

anyway, off to do that now bye thanks for the help good golfing and happy trails

Redwolf Programs

14:45

o/

PyGamer0

i/

caird coinheringaahing

15:34

@lyxal Not sure about closed, but ~44% of all CGCC questions hit the HNQ

Alan Bagel

@cairdcoinheringaahing what does HNG stand for

caird coinheringaahing

We close ~38% of questions, so that leaves ~18% of questions that aren't closed and don't hit HNQ

@AlanBagel Hot Network Questions, a feed that shows active questions across the network

pxeger

@cairdcoinheringaahing that's a surprising statistic

I wonder what percentage of questions get deleted

bigyihsuan

hey all my proposal has been sitting in the sandbox for almost 2 weeks now could i get some feedback on this? i don't want to go off posting this to the main site and getting feedback that should've been caught in the sandbox codegolf.meta.stackexchange.com/questions/2140/…

pxeger

(within three first 48 hours, let's say)

@bigyihsuan looks pretty good to me, but I don't understand "If it is unambiguous that a cut of cars all moves as a unit from one siding to another, you can omit a step to the intermediate track,"

bigyihsuan

15:48

so a lot of the time you're just moving a cut of cars from B/C/D to B/C/D
if you want to fully notate that you have to include an additional step of going to A, like `1ba 1ad` which, since the cut of cars the engine has hasn't changed between moving from B to D, i can notate it as `1bd` instead

though if it's like 1ba 2ba 12ad then you can't compact it since the cut on B changes before you move everything to D

besides 1ba 2ba 1adwouldn't be a legal move sequence because 1 is stuck "behind" 2, and you'd have to move 2 out of the way to move 1

aka the engine's cut of cars is a stack, with the top facing towards the sidings

Redwolf Programs

16:07

Reading the rows of this makes lots of low quality inspirational quotes

"be good. do first, say last. get long."

"think big, look high, want different" (picture of mountains in background)

rues

Where this from?

Redwolf Programs

Wikipedia's list of most common verbs and adjectives

rues

Interesting

@RedwolfPrograms isn’t it out of 1600?

Redwolf Programs

Nope, it's out of 1520 for some reason

Might be 1600 for the SAT itself

But it was 1440 for my PSAT 8, and 1520 for my PSAT 10

rues

Oh thid is psat

I’m so pissed about the psat because i got a good score but it was before junior year so I would have had to take nmsqt again

and i took tge sat in 10th grade but colleges are test optional now so all that studying was for nothing

Redwolf Programs

16:16

They'd probably prefer you to have the test scores though, right?

PyGamer0

   verb      |  noun
subscribe to | technoblade

rues

@RedwolfPrograms they don’t hold it against you if no score (or so they claim)

Redwolf Programs

Yeah, but it seems like it'd be assumed to be about average, so if you had like a perfect score I'd think you would do better

rues

My sat score was okay so I’m sending it to colleges after all but still

Redwolf Programs

Either a) scores would be assumed to be some specific number or b) nobody's scores would matter at all

I don't see how it could be anything other than those two

rues

16:18

@RedwolfPrograms i didn’t get a perfect score lol

Redwolf Programs

Well, close I mean

@RedwolfPrograms Or c) they make up for it by increasing the importance of other factors, so if you're stronger in academics than that sort of thing I'd think sending in test scores would be a good idea

rues

Sure yeah but it’s not going to impact my acceptance that much

I’m guaranteed to be accepted anyway because of my wonderful essay and accomplishments /s

pxeger

@bigyihsuan I've got it now, but I'd suggest defining "cut of cars" somewhere because (as someone not familiar with railway jargon) it confused the wording a lot

@rues simple, just accidentally drop a briefcase of $10M cash in the Dean of Admissions' office

then you don't need to worry about your essay or anything

rues

Good idea, could you lend it to me? :p

Redwolf Programs

16:49

@pxeger Or several pictures of the dean's family taken throughout the day

Preferably through the scope of a rifle for extra effect

pxeger

uh

New Posts

0

Q: Sum powers to n

Each natural number (including 0) can be written as a sum of distinct powers of integers (with a minimum exponent of 2). Your task is to output the smallest power required to represent \$n\$. For example: 2 = 1^2 + 1^3 // Output 3 9 = 1^2 + 2^3 = 3^2 // Output 2 15 = 2^2 + 2^3 + 1^4 + 1^5 + 1^6 ...

code-golf sequence number-theory

hyper-neutrino

17:07

@NewPosts lol, I could solve this in O(2^(n^3))

thejonymyster

@RedwolfPrograms be it gooder do it firster say it laster get it longer

hey, how about mutual quines that share as few chars as possible

cmp: ^ cool or lame

pxeger

could be interesting, yeah

assuming they have to be in the same language

thejonymyster

right yea

fun idea to consider: allow different output forms for each one so they can avoid sharing the same like

idk how to word it but like

one could alert, one could console.log

unless thatd be bad lol

Unrelated String

17:33

@pxeger wildcard seems like the one more likely to be deliberately used for its particular properties, so i'd say it should take priority

DLosc

17:45

@pxeger No idea which would turn out more useful, but if undefined == undefined is false, I would expect undefined == wildcard also to be false. In this case testing x == wildcard would mean "there is some non-wildcard value w for which x == w is true."

pxeger

great, more entirely conflicting answers! lol

DLosc

But I think I would prefer if undefined == undefined were true. In which case, I think either true or false would make equal amounts of sense for undefined == wildcard. :P

pxeger

I suppose you can use NaN if you really want it not to equal itself

DLosc

Is there only one kind of equality comparison in this language? Another option would be (in Python terms) that undefined != undefined but undefined is undefined

pxeger

I don't plan to add another kind, no

DLosc

17:49

Another thought: If undefined is conceptualized as "doesn't have a value," and wildcard is conceptualized as "matches any value," then undefined == wildcard should be false because undefined is not "any value," it is the lack of a value.

Redwolf Programs

@DLosc I don't know, you might want x[i] == y[i] to be false if i isn't in either x or y

I could see that being used for various golfs

Wezl - a cautionary tale

@pxeger follow in the footsteps of the great languages. Do whatever, wait for your language to become popular, then deprecate the old comparison operator and add one that makes sense

pxeger

lol

Redwolf Programs

When does the wildcard even show up?

I think it'd simplify things a lot to just remove that

Equality testing isn't even that common

DLosc

@RedwolfPrograms Ah, a frame challenge, I see :P

Wezl - a cautionary tale

17:53

@pxeger not sure what it should be? simple, return undefined. undefined == wildcard is undefined

pxeger

but then I need to decide whether undefined and wildcard are truthy or falsey respectively

DLosc

Surely undefined is falsey, no?

Redwolf Programs

undefined is obviously falsy, and wildcard is obviously truthy

Wezl - a cautionary tale

@pxeger undefined ? x : y => undefined

pxeger

well you'd think that, but is that actually the most useful way round

@Wezl-acautionarytale if you make too many things involving undefined just return undefined, you can never use it for anything

Redwolf Programs

17:56

There's some sort of is_undefined, right?

Wezl - a cautionary tale

@pxeger okay, make undefined return something else. how about undefined => wildcard

DLosc

@RedwolfPrograms [laughs in Pip, which has no direct way of testing if a value is nil]

@Wezl-acautionarytale oh no

pxeger

I think I'm going to scrap this idea completely

Wezl - a cautionary tale

great idea

Redwolf Programs

Maybe keep undefined

But wildcard seems very niche

Wezl - a cautionary tale

17:58

undefined should be a variable that can be redefined :P

Redwolf Programs

But whatever value undefined is set to should have the same behavior as undefined

E.g., if you run undefined = 2, 2 != 2

pxeger

that's reverse assignment

Redwolf Programs

No it isn't

5 mins ago, by Wezl - a cautionary tale

undefined should be a variable that can be redefined :P

pxeger

it basically assigns 2 = undefined

Redwolf Programs

When you make undefined something else though, the property no longer exists

pxeger

18:04

?

Redwolf Programs

And 2 is still 2, so 1 + 2 is still 3

But 2 != 2

pxeger

I already know 2 != 1!

that never changes!

Redwolf Programs

This is how you know you messed up

I count at least three JS-typing errors lol

pxeger

I'm trying to write Jelly rn, and the tell-tale sign you messed up here is getting lists which are much deeper than you wanted

DLosc

undefined should be the only falsey value in a separate truthy/falsey system that has its own set of logical operators, if/while statements, etc. (Compare C preprocessor directives.)

@Adám Approximately /əx/, like German ach but with a much higher vowel.

Razetime

18:11

@pxeger jht is a goldmine

pxeger

@Adám very short ɤ; then unvoiced uvular trill (which has no IPA character, it seems)

Redwolf Programs

I pronounce a quiet "ugh" as "ugh", but an "UGH" as "you-gee-aitch" like it's intended to be

pxeger

UGH = University of Ghana?

Redwolf Programs

No, a loud "ugh"

Like "UGH THERE'S A DECAYING BAT IN THIS HOT WATER TANK"

pxeger

how specifically do you pronounce the "ugh" bit though?

Redwolf Programs

18:16

"you-gee-aitch"

Duh

But quiet and sort of under my breath

Like a regular non-capitalized "ugh"

Adám

18:28

Sort of like "OMG"…

How do you say "omg" then?

Alan Bagel

@Adám the same i guess

Redwolf Programs

@Adám Imagine the sound someone swallowing a whole helium balloon would make

3

It's roughly akin to that

pxeger

When you reach 10k rep, you get a button that says "edit tags" under every question

This seems to be no different whatsoever from editing the question, so I guess it's just for speed

in which case why not give it to all users with editing privileges?

Redwolf Programs

That's something I think most users ask when they hit 10k lol

I guess it's because the 10k tools aren't particularly exciting on their own

I think at 10k you should be able to edit others' profiles

emanresu A

18:44

@thejonymyster There's a challenge on sharing no characters & it's really hard

pxeger

@RedwolfPrograms really? I wouldn't trust certain 10K+ users of this site with that privilege as far as I could throw them

Redwolf Programs

Yeah I know, I'm ~~joking~~ making a joke :p

pxeger

@RedwolfPrograms well maybe I should edit your profile to rename you to "joking"

or "making a joke", even

emanresu A

tag edits are non-bumping, so people mind less if you do lots of them

For example, you could go tag all of these

Neil

@pxeger you should make undefined == undefined return undefined, and !undefined also return undefined, etc.

emanresu A

18:48

(not all of those, some won't be related enough)

Aaroneous Miller

wait, that bumped

pxeger

I was gonna say, I thought tag edits still bumped

Redwolf Programs

Yeah, if they didn't you could tag 40 questions with lyxal-is-a-sussy-baka and get a (irrevocable) badge for it

emanresu A

Hm, I thought they didn't for some reason

anyway o/

Redwolf Programs

o/

pxeger

18:55

\o

Aaroneous Miller

/o

pxeger

@RedwolfPrograms which badge?

Redwolf Programs

Taxonomist

Oh, 50 not 40

thejonymyster

@emanresuA link plz

Redwolf Programs

Getting used to having to put : after if statements is the hardest part of using Python for me lol

thejonymyster

19:23

also whats the like, i dont know what its called but like

shit how do i even ask this

how does code golf feel, in general, about easier questions? i imagine as long as it isnt something trivial, its still interesting to golf in most langs? dunno what im getting at

Adám

@RedwolfPrograms Yeah, APL's having : before if is obviously the right design.

Leaky Nun

CMC: Given a positive integer n, return whether n is coprime to ten

Redwolf Programs

@thejonymyster Very much depends. Do you have something in mind?

Aaroneous Miller

lol i just realized that bump was actually my first retag

free badge tho

Adám

@LeakyNun APL: 1=10∘∨

Aaroneous Miller

19:32

@LeakyNun Vyxal, 3 bytes: ₀ġċ Returns 0 if coprime to ten, else 1. If that's not valid, ₀ġċ¬

Redwolf Programs

Indentation much? :p

Alan Bagel

0

A: Sandbox for Proposed Challenges

Chunk Sort a List code-golf sorting Your task is to input a list of integers and chunk sort it. You may assume the input list can always be chunked into groups of 1, 2, and 3. Definition Chunk sorting (a term I made up for the purpose of this challenge) is the action of first chunking a sequence ...

Feedback ^

thejonymyster

@RedwolfPrograms something pretty simple, along the lines of "check if all inputs are equal". idea i guess is that i like seeing weird esolangs compete / being able to compete in weird esolangs and some of the more challenging questions seem unapproachable xd

its possible i just need to get good though

~~maybe an "easy" tag~~

pxeger

20:02

@LeakyNun Zsh -F, 12 bytes: grep [1379]$

Outputs via exit code; 0 means coprime to 10; 1 means not coprime

(what do we output for 1? Mine says it is)

Leaky Nun

@pxeger 1 is coprime with 10

Redwolf Programs

20:23

Anyone want an invite to try a Google FooBar challenge? (idk what it does but it offered me an invite "for a friend" and I don't have those lol)

pxeger

@RedwolfPrograms sure

are they safe to publicly share? Or do you want my email

Redwolf Programs

Umm, probably better to email it

pxeger

[email protected] will do

Alan Bagel

I'd like to participate too.

Redwolf Programs

Unfortunately I only have one link

~~Fight! Fight! Fight!~~

pxeger

20:33

@AlanBagel if I get it, I might be able to give you an invite of my own and we can start a foobar invite virus

Redwolf Programs

Sent

Alan Bagel

link?

Redwolf Programs

I sent it to pxeger, it only works for one person

hyper-neutrino

start a google foobar pyramid scheme lmao

pxeger

@RedwolfPrograms thanks!

Redwolf Programs

20:37

TIL _ is a valid email address (minus the domain) lol

thejonymyster

so [email protected] is valid?

Redwolf Programs

Apparently

pxeger

IIRC, according to the spec, even @@pxeger.com would be valid

thejonymyster

starting an email app that only allows _s for your email adress

pxeger

although it's unlikely to be accepted anywhere

thejonymyster

20:39

fail

well we should check gmail at least, they should know what theyre doing right

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