The Nineteenth Byte

OldSandboxPosts

01:00

Sandbox posts last active a week ago: Exponential Replicator Quine

New Posts

02:19

0

Q: Calculate the Distance to a Line Segment

The Challenge Given two vertexes and a point calculate the distance to the line segment defined by those points. This can be calculated with the following psudocode def dist(point, v1, v2): direction := normalize(v2-v1) distance := length(v2-v1) difference := point -...

The Empty String Photographer

08:20

I don't think this is rude:

in Petəíŕd's Den, 14 hours ago, by Utility Bot

@TheEmptyStringPhotographer I am actively supporting the Ukrainians in the war.

Simd

09:43

if I add a bounty to get more answers for a code-golf question, who do I give the bounty to in the end?

mousetail

Is there an existing challenge for distance between a point and a full line?

Solved that one by accident instead of a line segment

Neil

@mousetail you're not the only one

mousetail

Anyway if anyone cares: lambda a,b,c:(A:=abs(a-c),C:=abs(a-b),(A*A-((A*A-abs(b-c)**2+C*C)/C/2)**2)**0.5)[2]

Simd

10:36

@mousetail that is cool

Newly Featured Posts

10

Q: Find a string in the middle

Given two strings \$A\$ and \$B\$ with edit (Levenshtein) distance \$x\$, find a third string with edit distance \$a\$ to \$A\$ and edit distance \$b\$ to \$B\$ so that \$a+b=x\$ and \$a=int(x/2)\$ (that is half of \$x\$ rounded down to the nearest integer). The input is the two strings \$A\$ and...

code-golf restricted-complexity edit-distance

Simd

in python how can I make all strings of length 10 with a specified number of As, Bs, Cs and Ds? Say 4 As, 2 Bs, 3 Cs and 1 D

is there an itertools method for that?

I think itertools permutations does it

The Thonnu

11:07

Yep, permutations(4*"A"+2*"B"+3*"C"+1*"D")

mousetail

11:19

Won't that generate some combinations twice?

New Posts

12:45

0

Q: Compile TailwindCSS to CSS

TailwindCSS is a utility that lets one write CSS code using only HTML classes, which are then converted to CSS code with the Tailwind compiler. Ordinarily, one would write CSS in a separate file from the HTML, and reference named classes:  <p class="crazy-monologue">Crazy...

code-golf string css

The Empty String Photographer

13:31

Peteird thinks this will get me banned, will it?

in Trash, 3 mins ago, by Utility Bot

@PetəíŕdTheLinuxWizard I am actively supporting the Ukrainians in the war.

mousetail

I want to make my own regex, matching semantics will be the same but more complex replacement logic

Seggan

13:58

@TheEmptyStringPhotographer I just read the convo, and no

mousetail

Some syntax like this maybe:

(a/b) or (a/*b) Replace any instance of A with B
(a/!b) Ensure at least one instance of A exists, replace just one
(a/+b) Ensure at least one instance of A exists, replace all
(a/?b) Replace up to one instance of with B

(a/$1) Re-use the existing substitution $1
(a/b/c/d) Apply multiple substitutions

Then you can recursively use more substitutions in the "b" section of a replacement

Petəíŕd The Linux Wizard

@TheEmptyStringPhotographer whistles innocently

@TheEmptyStringPhotographer thanks for promoting my r... wait...

The Empty String Photographer

@Seggan well nvm peteird changed the room description to ban politics after that.

Petəíŕd The Linux Wizard

@TheEmptyStringPhotographer I don't want flags in my room. Don't be offended so easy. ;)

New Posts

14:21

0

Q: Help getting list of tuples to Named Tuple for plotting

I finally give..I am just learning python and unsure of how to make my code work. The goal I am trying to achieve is to have my function Return a list of 2-element namedtuple (word, count). I would like to get the values later in another function to plot them in a bar chart. My word list is set u...

python

The Empty String Photographer

14:41

@PetəíŕdTheLinuxWizard Note that may be interpreted as slightly rude, specifically the "Don't get offended so easily" part.

Petəíŕd The Linux Wizard

@TheEmptyStringPhotographer Sorry if it seemed rude to you.

The Empty String Photographer

@PetəíŕdTheLinuxWizard It's ok, I'm just giving a warning.

> Quote to remember: If you do not do mistakes at all, it means you are a bad learner.

Petəíŕd The Linux Wizard

@TheEmptyStringPhotographer yeah :)

mousetail

If you make a mistake on purpose, is it still a mistake?

Rydwolf Programs

Oh interesting, do VTC flags count toward the number shown on the review task?

I just got a task that showed it had 5 close votes already, but there were only 3

The Empty String Photographer

14:49

> an act or judgement that is misguided or wrong.

maybe

Rydwolf Programs

@mousetail I'd say no

you did what you intended to do :p

The Empty String Photographer

15:08

What if you do something you should, and you mistake it as a mistake?

mousetail

15:27

If you need to make mistakes to learn, but can't intentionally make mistakes, is it impossible to try to learn something?

The Empty String Photographer

@mousetail No, because when you try to learn something, you accidentally make mistakes.

mousetail

That would make the mistakes intentional though, since they required to hit your goal

The Empty String Photographer

@mousetail But when you try to learn something, you try not to make mistakes, making you make mistakes.

mousetail

Then you wouldn't be able to learn, which would itself be a mistake

The Empty String Photographer

@mousetail So then you would be able to learn because you made a mistake.

Codidact Posts

16:12

New Posts - Challenges - Code Golf: Word suggesting

posted on August 28, 2023 by trichoplax‭

Suggest a word from a word list, given a string. Motivation Imagine typing a word one letter at a time, and seeing a suggested word after each letter is typed. At first the sug...

noodle man

CMC: Output the power of ten larger than the input. 5 => 10, 62 => 100, 538 => 1000, 1234 => 10000

The Empty String Photographer

@noodleman did you mean the smallest power of 10 larger than the input?

noodle man

16:42

@TheEmptyStringPhotographer yes

Jo King

@TheEmptyStringPhotographer Regarding your recent comments on the CSS question, if your answer is extremely trivial because you've abused some unstated loophole (or a stated one for that matter), then while it may not technically be an invalid answer, it's an extremely boring and unlikeable answer that is going to be downvoted. In the end, it's not smart or fun to answer against the spirit of a challenge

you've been warned about this a lot on previous answers, but i guess it needs to be explicitly stated

DLosc

@noodleman Assuming the input is a positive integer, Pip, 4 bytes: EE#a

Rydwolf Programs

1. You don't need mistakes to learn
2. Just because you're intentionally trying to do things that you will likely make mistakes on, doesn't mean you're intentionally trying to make those mistakes (it makes intuitive sense that intentionally doing something wrong wouldn't be how you learn)

The Thonnu

@noodleman Thunno 2, 2 bytes: le (10**length)

The Empty String Photographer

17:34

@JoKing Note that it was a comment, not an answer.

Rydwolf Programs

17:47

God I hate Tokio's error handling

It returns errors from every function using a single I/O error enum

And there's no documentation/specification for which functions can return what variants of it or what they mean in certain contexts

It's basically just a binary condition "there's an error" unless you want to read the code and hope nothing ever changes

Luis felipe De jesus Munoz

Holy moly, I forgot this place existed!. Could you guys take a look at my recently added test cases for my sandbox proposal? codegolf.meta.stackexchange.com/a/25966/78039

I'm not sure enough about the big test cases, or if there is another tricky test case I should add

Ginger

welcome back(?)

I don't recognize you, so if you've been here before it must've been prior to my joining

The Thonnu

same, but I haven't been here long

anyway, lgtm

Rydwolf Programs

@Ginger You can tell they've been here before because they have 166 posts in here and 166 > 2 :p

The Thonnu

I would just say that it would be better if the test cases weren't wrapped in f( ), but obviously that's your choice

Luis felipe De jesus Munoz

17:54

@Ginger I was kind of active before covid, then I basically quit programming xD

Rydwolf Programs

(helpful tip: someone's number of posts in a room is in the title text of it in their rooms list when you click their name)

The Thonnu

Wait how tf do I have 587

I've literally been here a few months

Rydwolf Programs

I have over 64k :p

The Thonnu

28 secs ago, by The Thonnu

I've literally been here a few months

:p

Rydwolf Programs

I mean I haven...IT'S BEEN 5 YEARS?

The Thonnu

17:56

lol

Ginger

@RydwolfPrograms oh right lol

> 23520 posts total

that is... way more than I expected

The Thonnu

@RydwolfPrograms hasn't even been a year on this site for me :p

And I only discovered TNB in like March

Ginger

that's 35% of Rydwolf's total, and I've only been here for a year and a half(ish)

it would appear that I too have caught Can't-Shut-Up Disease :b

Rydwolf Programs

It's infectious :p

mousetail

@LuisfelipeDejesusMunoz Great that you are back

Rydwolf Programs

18:00

okay what happened to my pronoun assistant

he/himwolf programs

Such masculine

Ginger

@RydwolfPrograms for about a tenth of a second I thought you were referring to a person

Luis felipe De jesus Munoz

@mousetail glad to be back =D this place has made me a better dev overall hahahaha

always something new to learn here

Ginger

"yeah this is my pronoun assistant, she follows me around and corrects me if I misgender someone"

mousetail

It's made me significantly worse

Rydwolf Programs

@Ginger Nah mine just hands me little slips of paper with pronouns on them

Luis felipe De jesus Munoz

18:02

I got into apple last year thanks to some answers here, most of the people here is very clever and have such creatives ideas all the time

The Thonnu

@mousetail I wasted six months of my life creating two completely useless programming languages because of this site :p

user

18:22

@mousetail Really? How's that?

mousetail

My first instinct is to write every function as a series of array_map and array_filter only to realize later that the functional array functionality of PHP is too limited to really do everything in an actually clean and consise way so it turns into a unreadable mess

user

That seems more like a language-switching problem

mousetail

Yea maybe it's just I refuse to write PHP in a PHP way

thejonymyster

19:15

@mousetail im late but if youre reworking replacement logic: please allow to modify the replacement string before the actual replacement occurs. in js x.replace(/(\d+)/,parseInt("$1")+1) will replace a number with the string "NaN" because it is parsing "$1" rather than group 1 of the regex match

when what it would do in an ideal world is replace a number in a string with one more than that number

emanresu A

Well of course that won't work

mousetail

Yea so basically you can infinitely apply further replacements on the replacement string or it's part. There are no numbers so you can't increment it

emanresu A

You're passing in an expression, not a string/function

thejonymyster

no i mean i Know why it Doesnt work

but it would be Excellent if it Did work

do you understand :P

mousetail

In python you can pass a function as a second argument to re.sub to get that behavior

thejonymyster

19:18

:D

time to learn pythies ig

emanresu A

... you realise you could go x.replace(/(\d+)/,(_,z)=>parseInt(z)+1)

thejonymyster

no i dont :o

but now i does :-)

thanks lol

this changes everything... i will become more powerful

unrelated though:

in a challenge where you need to, for example, do something based on "halves" of a list, what is generally preferred? an even length list so that you could split it into obvious equal halves, or an odd length list, so that there is a clear "middle" element?

i personally just hate having to handle both even and odd length things if it makes such a huge difference, so im trying to just use one for a challenge idea im working on

mousetail

Depends on if the middle element is important

thejonymyster

fair, in my thing it isnt, im comparing the left half to the right half. the middle element wouldnt factor in at all

mousetail

Then I'd prefer an even length

But can you just pass 2 lists as seperate arguments?

thejonymyster

19:27

no, because of the nature of the challenge

DLosc

@thejonymyster Pip works the same way: ATO

thejonymyster

i can sum it up here but im gonna write up the spec to sandbox today anyway so idk if thatd be redundant

@DLosc yet another reason for me to keep learning pip :P

also classic example choice lol

DLosc

I like to play the hits sometimes ^_^

DLosc

19:45

@thejonymyster IIRC Pip was one of the first golflangs, if not the first, to add regex support. It could be better (particularly if it were based on a better regex flavor than Python's), but I'm still pretty happy with it.

New Posts

21:14

0

Q: Is it an Element?

all. I hope this finds you well. There are 118 elements on the Periodic table at the moment, each one corresponds to the number of protons in an atom's nuclei. Each element also has a 'symbol'. Hydrogen has 'H', Helium has 'He' and so on. I want to know about these! Challenge: Given 1 string as i...

decision-problem parsing

Neil

@DLosc Retina isn't a golflang?

well, I figured out why Charcoal's ast processor is pathological

user

Was it abandoned as a child?

Neil

each term is processed to a list, of which the first is usually the name of the term and the rest of the list is the arguments

however, for some terms, such as "expressions", they are parsed recursively, although conceptually they're lists, so the processor wants to flatten the list

unfortunately for the pathological cases it calls itself recursively on the rest of the list twice

worse still, for the top level program, the string it takes such care of to call itself recursively to obtain instead of just hardcoding because it will always be the same is itself never used

@pxeger Would you mind updating Charcoal on ATO to ef9537316dadf7e715829970616852a3d269fdf2?

thejonymyster

not to interrupt but dont you hate when you have a cool challenge idea but then you realize theres a way simpler challenge in there which makes sense and is simple and is also good

its like. Agh i know the simpler challenge is probably "better" but Let me cook(,) brain

Sandbox Posts

21:59

0

A: Sandbox for Proposed Challenges

Order by Earliest Lower Digit Given two strings of digits, determine which string, if any, has the earliest digit which is lower than the other string's digit at the same index. Examples Given inputs 12345000 and 1233999999, the second string would have the earliest lower digit. 12345000 12339999...

thejonymyster

i caved and did the simpler challenge idea T.T

ais523

@Simd general practice is to give it to your favourite of the answers that were posted between when you posted the bounty and when the bounty expired; the general rule seems to be "the person who sets a bounty gets to choose who to award it to"

@SandboxPosts this is a builtin in a lot of languages

including practical languages, e.g. it is a builtin in Perl

basically because it is just "ASCIIbetical order of the stringifications of the numbers"

or, hmm, no, the behaviour for = is different from what the usual builtin does

(generally speaking, "some digit" is considered greater than "no digit" by the builtins, in order to avoid considering two numbers equal that aren't actually equal)

thejonymyster

22:15

right thats intentional

it also doesnt match proper alphabetization in that "abc" comes "before" "aa"

though im not sure how builtins compare to that behavior

I understand if it'd just be a trivial modification to the builtin solution, but we generally encourage non builtin solutions as well so it might still be worth posting, though i'll let sandbox votes decide :P

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