The Nineteenth Byte

00:00

I'd imagine it'd either turn it into a raw link, or have some weird messed up formatting

Welcome to the 9th Biweekly Mini Golf. During this event, we'll post some CMCs (Chat Mini Challenges) for you all to solve. A new one will be added every 5 to 10 minutes. Feel free to keep suggesting drafts during the event. If you have any questions, don't be afraid to ask. Good luck!

3

hyper-neutrino

i think it just rerenders the post md to comment md and any mangling that happens just happens

caird coinheringaahing

in BMG Drafts, 2 hours ago, by DLosc

Draft: Given two positive numbers h and w, output the first w numbers in the following pattern: 1, 2, ..., h-1, h, h-1, ..., 2, 1, 2, ..., h-1, h, ...

in BMG Drafts, 2 hours ago, by caird coinheringaahing

Draft: Output all pandigital numbers

hyper-neutrino

oh hey a BMG that i am actually here for

emanresu A

Same

hyper-neutrino

@cairdcoinheringaahing Jelly, 6 bytes: RŒB⁹¡ḣ (Try It Online!)

it is really inefficient tho but idc. also there is probably a better method anyway

caird coinheringaahing

00:03

ಠ_ಠ why doesn't ŒB cast to range

emanresu A

Is Vyxal down?

caird coinheringaahing

Then ŒB¡ḣ would work

emanresu A

Oh no

Maybe it was lyxal

running something

hyper-neutrino

@emanresuA you're gonna have to be more specific than that

emanresu A

nvm

@hyper-neutrino It's working now, maybe someone was using T or running something else time-intensive

Aaron Miller

00:05

@emanresuA looks at screen nervously

emanresu A

What did you do...

@cairdcoinheringaahing 13 bytes

caird coinheringaahing

@cairdcoinheringaahing Jelly, 9 bytes (warning: will not terminate :P)

Aaron Miller

@emanresuA Uh… nothing? Definitely not 1234567890Ṗ

emanresu A

@cairdcoinheringaahing Vyxal: kdṖ (Don't run plz)

@AaronMiller smh use kd

caird coinheringaahing

@cairdcoinheringaahing I am dumb :/

hyper-neutrino

00:08

lol

caird coinheringaahing

@emanresuA All permutations? Got to filter out those that begin with 0

lyxal

@cairdcoinheringaahing no, you're caird.

emanresu A

Fine, kdṖ'hI

Aaron Miller

@emanresuA I was testing how the command worked with numbers before actually golfing it. Probably should’ve used 123 or smth instead

user

@cairdcoinheringaahing Scala, 28 bytes: h=>1.to(h)++h.to(1,-1)take _

caird coinheringaahing

00:10

@cairdcoinheringaahing Jelly, 8 bytes

@emanresuA That outputs numbers right, not lists of digits? :P

in BMG Drafts, 2 hours ago, by DLosc

Draft: Given a nonnegative integer h, outputting its "bouncing" sequence: h, h-1, ..., 1, 0, 1, ..., h-2, h-1, h-2, ..., 1, 0, 1, ..., h-3, h-2, h-3, ....., 1, 0, 1, 2, 1, 0, 1, 0

emanresu A

@cairdcoinheringaahing List of strings

Which is perfectly valid

'hI filters numbers by the parseint of their first char

So no 0

Niko

@cairdcoinheringaahing python 3.8, 65bytes Try it online!

Aaron Miller

@emanresuA do you need the I?

emanresu A

Is '0' falsy

caird coinheringaahing

@Niko Congrats on 1111 rep :P

emanresu A

00:12

One moment

Niko

@cairdcoinheringaahing thx :D

emanresu A

@AaronMiller lyxal.pythonanywhere.com?flags=&code=%5C0%E1%B8%83&inpu… Nope

Aaron Miller

OIC, I thought kd returned a number, not a string

emanresu A

@Niko Your next goal is 11111

hyper-neutrino

@cairdcoinheringaahing Jelly, 10 bytes: (Try It Online!)

Niko

00:14

@emanresuA that's 10k from 1111

hmmmm

62 bytes now Try it online!

caird coinheringaahing

in BMG Drafts, 41 mins ago, by user

Draft: Given two vectors in any number of dimensions, find another vector that is orthogonal to both

Niko

61 bytes, gonna keep working on it

caird coinheringaahing

in BMG Drafts, 41 mins ago, by caird coinheringaahing

Draft: Dot product of two vectors

lyxal

@cairdcoinheringaahing Vyxal, *∑

user

@cairdcoinheringaahing APL, 3 bytes: +/× :P

caird coinheringaahing

00:19

@Niko 55 bytes

user

Imagine using list() when you can use [...]

caird coinheringaahing

52 bytes :P

user

@cairdcoinheringaahing Oh wait, i didn't realize this repeated more than twice

Oh right, Python uses *

Niko

still don't understand *

but looks useful

Aaron Miller

@lyxal imagine using ∑ instead of s flag smh

user

00:22

@user I'm an idiot, that should be h=>w=>1 to w flatMap(_=>1.to(h)++h.to(1,-1))take w instead

@AaronMiller But that would only enrage the flag haters

Bubbler

@cairdcoinheringaahing This one could work on main. If two vectors are parallel then the answer is 90 deg rotation of one of the inputs, otherwise the cross product of first 3 dimensions with zero padding works

Aaron Miller

@user Good. /s

Niko

@cairdcoinheringaahing python 30 bytes Try it online!

user

@Niko foo(*[bar, baz, xyzzy]) == foo(bar, baz, xyzzy)

Niko

@user ooooooh

caird coinheringaahing

00:23

@Niko That only works for 2d vectors

Bubbler

That is, assuming zero vectors are not valid answers and the two inputs are also nonzero

Niko

@cairdcoinheringaahing oh

user

@cairdcoinheringaahing What, don't you live in a 2d universe? :P

Niko

gonna fix that real quick

user

I keep mistaking Niko for Bubbler because their pfps look the same

caird coinheringaahing

00:24

36 bytes to work for any length :P

Niko

<del>I am a 3D being now</del>

user

Ooh, int.__mul__

caird coinheringaahing

---strikethrough--- ~~strikethrough~~

Niko

your local del do not work here

markdown failed me again

user

I was going to go with lambda a,b:sum(a*b for a,b in zip(a,b)), didn't know you could do that

Niko

00:25

gtg class is on :P

user

@Niko HTML doesn't work here, this isn't Markdown

caird coinheringaahing

in BMG Drafts, 34 mins ago, by Bubbler

Draft: Given two vectors (not necessarily same length) a, b, and a number c, pad the shorter one with c and compute their dot product

user

Markdown is only for posts, it doesn't even work in comments

Bubbler

@user How is that possible lol

lyxal

@cairdcoinheringaahing if only c could always be 0 ;p

user

00:26

Orange

All orange is the same to me

Bubbler

But I have some pink too

and less orange

user

My eyes do not discriminate over such small things

Plus, I can barely see the pink, and it looks like orange anyway

caird coinheringaahing

Bubler and Niko are both catgirls, so they're essentially the same person :P

5

Bubbler

Okay, time to write every message over three lines /s

emanresu A

how
about
five
its
better

user

00:28

@cairdcoinheringaahing Wait, if all catgirls are equal, if we convert one into a doggirl, will all be converted?

@emanresuA how / about / four / instead

emanresu A

that
is
one
not
four

user

Eh

One, four, what's the difference, right? They all pale in comparison to the greatness of 14

The human brain struggles to comprehend a number that large

caird coinheringaahing

@cairdcoinheringaahing The fact that either a or b could be the shortest is annoying :/

lyxal

@cairdcoinheringaahing may we please assume all positive integers?

caird coinheringaahing

@Bubbler ^

Bubbler

00:33

I'll allow that

@cairdcoinheringaahing Python 3, 84 bytes

because itertools

caird coinheringaahing

in BMG Drafts, 40 mins ago, by caird coinheringaahing

CMC: Given a string as an input, output ┬─┬ ノ( ゜-゜ノ) if the input equals (ノ°Д°）ノ︵ ┻━┻, otherwise output nothing

Aaron Miller

@lyxal y l no work?

lyxal

@AaronMiller wdym

user

@cairdcoinheringaahing Scala: Map("(ノ°Д°）ノ︵ ┻━┻"->"┬─┬ ノ( ゜-゜ノ)"). Not sure if this is valid, since it throws an error on other inputs

Aaron Miller

@lyxal l should do len(a) == len(b), but it doesn’t work: Try it Online!

user

00:36

FIRE!!!

Bubbler

APL, 71 bytes unicode:{⍵≡'(ノ°Д°）ノ︵ ┻━┻':'┬─┬ ノ( ゜-゜ノ)'}⍞, TIO

caird coinheringaahing

@cairdcoinheringaahing Jelly, 12 bytes LÞẈIẋ@;@"⁸ḋ/

lyxal

@AaronMiller you can do it without l

@cairdcoinheringaahing Vyxal, 8 bytes: Zƛ⁰v⟇Π;∑

user

@cairdcoinheringaahing Can we error on non-flip inputs?

caird coinheringaahing

Sure

user

00:38

Yay

Aaron Miller

@lyxal Yes, but l could be useful in challenges like this, if it worked

lyxal

@AaronMiller that'll be fixed in 2.6

Aaron Miller

👍

caird coinheringaahing

@cairdcoinheringaahing Jelly, 11 bytes LÞẈI⁹ẋ⁸;"ḋ/

Aaron Miller

18 mins ago, by Aaron Miller

@lyxal imagine using ∑ instead of s flag smh

caird coinheringaahing

00:40

in BMG Drafts, 42 mins ago, by Bubbler

Draft: Given a vector of integers, test if it is all zeros

user

Scala: _ forall 0.==

caird coinheringaahing

@Bubbler Can we output a falsey value if yes, truthy if no?

lyxal

@cairdcoinheringaahing Vyxal, 3 bytes: 0J≈

Bubbler

@cairdcoinheringaahing Fine

Aaron Miller

@cairdcoinheringaahing Vyxal, 3 bytes: 0J≈

DLosc

00:42

@cairdcoinheringaahing Pip -x, 11 bytes: $*_MS@<gZDc

lyxal

@AaronMiller ninja'd

Bubbler

But then I guess the answer is 1 byte in Jelly

user

@cairdcoinheringaahing APL: ∨/× (inverted)

Aaron Miller

Ninja’d

caird coinheringaahing

Jelly, 2 bytes ḟS

Aaron Miller

00:42

crap double ninja’d

caird coinheringaahing

@Bubbler 1 byte?

Bubbler

Any

caird coinheringaahing

....

Bubbler

:P

lyxal

@cairdcoinheringaahing a¬ in vyxal with normal output

caird coinheringaahing

00:43

2 bytes in Jelly, going by the standard truthy/falsey :P

Jelly, 2 bytes ¬Ạ

Aaron Miller

@cairdcoinheringaahing Vyxal G, 0 bytes. Returns 0 if all zeros, or a positive int otherwise. :P

user

@lyxal Does Vyxal have a way to apply a function to the stack without popping anything off of it? (like some kind of smart duplicate that duplicates as many items as needed)

caird coinheringaahing

@AaronMiller What does G do?

In fact, why wouldn't s as a flag work?

lyxal

@user no

Aaron Miller

@user maybe ~?

@cairdcoinheringaahing maximum

lyxal

00:45

@AaronMiller that's what I was about to suggest to make work

caird coinheringaahing

:P

user

Ah

lyxal

@user for dyadic and triadic elements, yes

caird coinheringaahing

More interesting:

in BMG Drafts, 47 mins ago, by Bubbler

Draft: Given a vector of integers, test if it is all ones

user

@cairdcoinheringaahing Scala: _ forall 1.== (sorry, same answer as before)

lyxal

00:46

@cairdcoinheringaahing 1J≈ in Vyxal

caird coinheringaahing

If I can output en empty list for "yes" and a non-empty list for no, I get Jelly, 2 bytes ḟE

emanresu A

@cairdcoinheringaahing ₌∑L= or 1=A

DLosc

@cairdcoinheringaahing Pip, 6 bytes: $=gPU1

emanresu A

@cairdcoinheringaahing Same here, 'ċ

DLosc

Append a 1 to the arglist and check for equality

caird coinheringaahing

00:47

What about "sum equals length"?

user

Won't work

Bubbler

Counterexample: [0, 2]

user

Argh ninja'd

caird coinheringaahing

Ah yeah. Damn identity elements ಠ_ಠ

Bubbler

"Product is 1" works if limited to non-negative integers

caird coinheringaahing

00:48

Imagine working with a group that includes an identity element :P

user

@cairdcoinheringaahing ikr, I wish 0 had an identity crisis sometime and just went away

caird coinheringaahing

@cairdcoinheringaahing Made by the (ℕ, +) gang :P

user

@cairdcoinheringaahing Imagine working with structures

@cairdcoinheringaahing Is that natural numbers without 0, then?

caird coinheringaahing

Of course :P

user

I hate the ambiguity of N

Why can't mathematicians just agree on notation like rational people?

Aaron Miller

00:50

@cairdcoinheringaahing it would work, but I don’t ever get to use G :p

Bubbler

@cairdcoinheringaahing Supporters of Peano arithmetic disagree with you :P

DLosc

@cairdcoinheringaahing Also 6 bytes: JUQgQ1 (remove duplicates, join as string, assert string-equal to 1)

user

Math: Making life miserable for everyone since 1000 BCE

Bubbler

N without 0 is nice in number theory, but N with 0 is nice in formal proof theory, that's all

user

@Bubbler Supporters of Peano arithmetic were probably dropped on their heads as babies :P

DLosc

00:52

@user There's some rebuttal joke here about Bayesian statistics, but I can't find it

caird coinheringaahing

@Bubbler Anyone who supports N with zero is wrong :P

N with zero is literally 𝕎 :P

Bubbler

@Bubbler (This includes me after having studied Coq and Lean)

user

@DLosc You Peano people are too naive

Bubbler

@cairdcoinheringaahing Reference?

Unrelated String

we literally have a different symbol for 𝕎, why would you use ℕ for 𝕎

Bubbler

00:54

Or is it literally a joke?

Unrelated String

i say getting ℕ from the brachylog bookmarklet

caird coinheringaahing

I've seen 𝕎 be used to represent the "whole numbers" (aka, non-negatives)

Bubbler

Oh right, I do remember whole numbers

user

@UnrelatedString ikr, it's like mathematicians want to confuse the heck out of innocent civilians

Bubbler

but didn't know there's a notation for that. I think I saw more like N ∪ {0}

user

00:56

Ah, so you do admit N doesn't contain 0!

Unrelated String

~~the best argument for ℕ excluding 0 is doing a search for ℕ₁ in the brachylog corpus~~

user

@Bubbler There's a joke about that article about image browsers here, but I can't find it

Bubbler

Yeah, I agree N starts with 1. The problem is with the plain English term "natural numbers"

user

0 is unnatural.

caird coinheringaahing

@Bubbler github.com/cairdcoinheringaahing/Whispers/blob/master/…

user

00:58

2

caird coinheringaahing

Whispers says 𝕎 is whole numbers, therefore it is :P

in BMG Drafts, 1 hour ago, by Bubbler

Draft: Given a vector of integers, test if it is a continuous range [a, a+1, a+2, ..., a+b] for some integers a and b

Unrelated String

i feel like i was taught the distinction between wholes and naturals in elementary school, so we might hope that it catches on from there, but i also don't recall it being brought up again for years afterwards if ever so most people probably just forget

user

@cairdcoinheringaahing Hmm, this "caird coinheringaahing" looks totally legit, definitely no relation to the CGCC user by the same name

^^ We had a Venn diagram showing them and everything

emanresu A

@user I've ssen that before

user

I think I confused natural numbers with the digits for a long time though lol

caird coinheringaahing

00:59

That's the last of the BMG drafts that were starred, so we'll say that's the end of the event. Feel free to keep solving the posted challenges, and to solve the ones that weren't starred

user

@emanresuA Yeah, I copied someone else's image

Unrelated String

@user i remember that exactly

emanresu A

@user Like here

OldSandboxPosts

Sandbox posts last active a week ago: Fastest untyped lambda calculus evaluator [fastest-code] [functional-programming] [lambda-calculus] [interpreter]

emanresu A

Someone posted it befor

caird coinheringaahing

01:00

That was me IIRC :P

user

CMC: Given a string as an input, output ┬─┬ ノ( ゜-゜ノ) if the input equals (ノ°Д°）ノ︵ ┻━┻ and vice versa, otherwise output nothing

emanresu A

@OldSandboxPosts Have you revised your opinion of sand?

caird coinheringaahing

@OldSandboxPosts I thought you were dead, you hadn't posted anything in 3 days :P

user

@emanresuA Yes, I searched for christianity and found it :P

Oops, time to unignore Old Sandbox Posts

Bubbler

@UnrelatedString I saw it for the very first time in a uni-level number theory textbook. "Whole numbers" doesn't simply have a translation in my language, we just literally call them "nonnegative integers"

Unrelated String

01:01

makes sense

DLosc

@cairdcoinheringaahing Pip, 7 bytes: g=a+,#g

user

What language is that?

Unrelated String

@user i think it went as far as complex ⊃ reals ⊃ rationals ⊃ integers ⊃ wholes ⊃ naturals

caird coinheringaahing

What about primes?

emanresu A

@user Korean, correct?

user

01:02

@UnrelatedString Oh, we didn't learn about complex and real numbers in elementary school lol

Does Korean have no way of saying whole/full/any other synonyms? @Bubbler

Unrelated String

i didn't either

Bubbler

@user @emanresuA Yes

Unrelated String

they just mentioned them with no further explanation

user

lol

OldSandboxPosts

@emanresuA I think caird coinheringaahing is a Sith Lord!

Unrelated String

01:03

didn't stop me from feeling smug about looking quaternions up on wikipedia

user

My school tried to shield us from "advanced math" such as negative numbers and decimals, so 3/4 and 4-10 were considered to just not exist

emanresu A

@OldSandboxPosts I agree.

Unrelated String

lmao

i think i remember something to that effect too

emanresu A

@user Lol

Were there conspiracies?

user

Not sure what you mean

Bubbler

01:04

@user Just "numbers" in informal terms

user

Huh

Bubbler

The formal terms only include "positive integers" = "natural numbers", "negative integers", "nonnegative integers". No specific word for "whole numbers"

emanresu A

Were there people wondering what those could be? Maybe they were powerful weapons...

OldSandboxPosts

@emanresuA Have you heard the story of Darth Dennis the Jelly? I thought not. It's not a story the Vyxal golfers would tell you. Darth Dennis had the ability to manipulate the bytes themselves to create... golf. The Jelly side of code golf is a pathway to abilities some consider... unnatural.

Until, an apprentice, Darth Bubbler, outgolfed him while he rested. Ironic. He could outgolf others, but couldn't save himself from being outgolfed

user

@emanresuA Well, a bunch of us had learned about negative numbers already thanks to another teacher, so it was weird when the teacher marked stuff like 3-4=-1 wrong because 3-4=impossible ⍨

@OldSandboxPosts wtf

Is that you, Redwolf?

caird coinheringaahing

01:08

Yes. It's Redwolf. Definitely.

emanresu A

@user No, caird has the login details

user

Ah

Wait, so you admit that Jelly is the Dark Side and that Vyxalers are the good guys/the Jedi?

caird coinheringaahing

Thinking about it, I don't think Redwolf does

@user "good guys"

I don't think you were paying attention when you watched Star Wars. It's the story of a teenager becoming radicalised by an ancient religious cult into committing an act of mass terrorism

3

emanresu A

@cairdcoinheringaahing Agreed

@cairdcoinheringaahing sroty

Bubbler

It's like the entire site went into Jelly vs Vyxal competition (faction war?)

caird coinheringaahing

01:11

The Jedi aren't the good guys, the Sith are, as they tried to liberate the galaxy from an oppressive religious influence on a democratically elected government :P

DLosc

@cairdcoinheringaahing Well, yes, I agree. --Wait, you're not talking about the prequels? ;)

user

@cairdcoinheringaahing Really? I thought it was the story of a wise, powerful old man fighting off puny rebels but finally being betrayed by one of the pupils that was closest to him

@cairdcoinheringaahing Yes, this is the way to interpret it

emanresu A

@user Obi-wan / Kylo?

DLosc

@Bubbler I am neutral

caird coinheringaahing

What drives a man to be neutral? Gold? Power? Or were you just born with a heart of neutrality?

Bubbler

01:14

Desire to refrain from fight, I guess

caird coinheringaahing

@DLosc The prequels are about a child, raised as a slave, being freed, only to be indoctrinated by a religious cult. He then begins to notice and understand the problems with that cult and attempts to leave it, only to be viciously attacked and mutilated by high-ranking members of that cult, all while protecting the democratically elected leader of the state he lives in

As for the sequels, I have no idea what's going on there :P

DLosc

@cairdcoinheringaahing "I am not altogether on anybody’s side, because nobody is altogether on my side, if you understand me."

caird coinheringaahing

What makes a man turn neutral?

►

DLosc

@cairdcoinheringaahing Gold. Definitely gold.

Browncat Programs

01:46

@cairdcoinheringaahing Well I mean I do have the login details if I care enough to mess with your code and print them before it logs in :p

Which I don't :p

Aaron Miller

01:58

Related to this meta post, would I be able to use ? in a Vyxal program with no input to be able to push a 0 without it interfering with other numeric literals? For example, doing ?9 to push 0, then 9, instead of 0 9.

lyxal

@AaronMiller I would think so

it's just the equivalent of a nilad that pushes 0

Aaron Miller

Noice

Wait, I actually need a 1. :P

Still, good to know for the future

Hey, with the specific circumstances, I can use ! instead, and it’ll push 1 every time! :D

caird coinheringaahing

Why doesn't 09 push 0 and 9?

Aaron Miller

It pushes the number 09, which is 9.

Browncat Programs

>:|

Why...

caird coinheringaahing

02:12

That's bad golfiness :P

lyxal

@BrowncatPrograms because every other sane language evaluates 09 as 9

caird coinheringaahing

Your number regex should be 0|[1-9]\d* :P

Browncat Programs

@lyxal But...this is a golfing language

Golfiness > doing what other langs do

caird coinheringaahing

@lyxal OTOH, 0 9 is wasting a byte

God I hate mobile chat

lyxal

@BrowncatPrograms with aspects from traditional languages

Browncat Programs

02:13

Parsing leading 0s as separate numbers isn't even that un-sane

Aaron Miller

@BrowncatPrograms The way that numbers are parsed, it simply takes all consecutive number chars (0123456789.) and puts them together, then resolves anything where there’re multiple . (it drops everything from the second . on) and pushes that number

lyxal

~~we just like giving you and Caird things to complain about~~

caird coinheringaahing

...

Aaron Miller

^^

caird coinheringaahing

@AaronMiller Ok, normally, I'm fine with Vyxal being weird. This time, I'm going to open a PR to fix that behaviour tomorrow, because that's just wrong

Browncat Programs

02:15

Ash didn't even combine digits

Because it has a shorter way of representing every number above 9

Aaron Miller

@cairdcoinheringaahing Hmm… I don’t see any reason that regex shouldn’t work, so I’ll use it in Ｃｕｒｓｅｄ. /s

caird coinheringaahing

Use whatever flags you want, have whatever specific builtins you like, fine. Parse numbers like that, in a stack Lang, you're getting corrected :P

hyper-neutrino

@lyxal aspects from traditional languages should mean syntactical structures familiar to people not used to golf lang structures, not that obvious byte save mechanisms should be removed in favor of being how it works in traditional languages

also 09 is a syntax error in python...

just my take

caird coinheringaahing

If there is any language construct that works best in stack langs, it's being able to push multiple numbers with no separator

lyxal

@cairdcoinheringaahing we don't use regex

caird coinheringaahing

02:17

...

Do you mind if I just rewrite Vyxal, but as a proper interpreter? :P

Aaron Miller

One thing that is really nice with the way numbers are parsed is that a lone . pushes 0.5.

lyxal

@cairdcoinheringaahing We're already doing that

hyper-neutrino

wait we're not transpiling anymore?

emanresu A

@cairdcoinheringaahing Sure, go ahead! It'll be nice having a break

@hyper-neutrino No

Still transpirekl,

hyper-neutrino

ah

Browncat Programs

02:18

@BrowncatPrograms (Ash has 10-16 as single byte constants, and a two byte representation for every number up to around 400, then three bytes can be used for everything up to around 67000)

caird coinheringaahing

I swear, I'll keep all the weird stuff that makes no sense. To me, that's minor compared to having an actual good interpreter :P

Browncat Programs

@BrowncatPrograms (Which wasted a lot of code page spaces, don't do that :p)

lyxal

@hyper-neutrino we are

As in, we're rewriting it already

@cairdcoinheringaahing you missed your chance

hyper-neutrino

hm, ok

lyxal

@cairdcoinheringaahing Should have said something a few months ago

caird coinheringaahing

02:23

I'll just write Ayxal, and write it in Add++ :P

lyxal

50

Q: When you should NOT use Regular Expressions?

Regular expressions are powerful tool in programmer's arsenal, but - there are some cases when they are not a best choice, or even outright harmful. Simple example #1 is parsing HTML with regexp - a known road to numerous bugs. Probably, this also attributes to parsing in general. But, are th...

regular-expressions

CMQ: Use regex for parsing esolangs?

Browncat Programs

For things like identifying numbers, sure

Probably don't parse your whole golflang with regexps, but using them to parse things which aren't too complicated is fine IMO

Bubbler

Theoretical point: Perl regex can absolutely parse entire grammar for most esolangs, though I'm not an actual Perl user so I'm not sure how you can actually interpret the code using it

My practical point is the same as ^^

Usually I parse a lang with a parser library from start to the end (down to number and string literals etc) so I don't use regex per se

caird coinheringaahing

Just use Retina to parse and tokenise your program, then Charcoal to interpreter those tokens. Also known as "the Neil way" :P

Bubbler

Wut :P

caird coinheringaahing

02:31

Neil mainly uses Retina and Charcoal on main :P

Aaron Miller

@cairdcoinheringaahing Make sure to make custom interpreters for Retina and Charcoal that parse the program with regex :P

Browncat Programs

Parse regex with regex?

caird coinheringaahing

And, given some of those answers, I wouldn't be surprised if you could write a half decent interpreter in Charcoal or Retina

Aaron Miller

02:46

@BrowncatPrograms Charcoal has regex? :P

Unrelated String

retina is regex

Razetime

03:08

@cairdcoinheringaahing would be funny if neil actually made an esolang like this

Bubbler

@cairdcoinheringaahing Charcoal is just a general purpose imperative language with some screen drawing built-ins, so I won't be surprised if you could write an actually good interpreter in it

lyxal

04:02

This is so sad

Alexa play despacito

Mfers really put a copyright claim on amogus trap remix

We really do live in a susiety

5

PyGamer0

04:15

@cairdcoinheringaahing oh thx for the summary

never watched star wars

Bubbler

04:38

Literally every single piece of music gets copyright-claimed these days

PyGamer0

^ More logic gates

Bubbler

That's just a 3-way and

PyGamer0

it has 2 ands inside it

so its a ~~dyad~~ dyand

Bubbler

Challenge idea: Golf all 256 3-input logic gates (extension of this)

...and apparently we don't have a metagolf challenge for logic gates

Two possible flavors: 1) choose your output language and golf the output 2) output actual circuits and minimize NAND gates

PyGamer0

04:57

can i share cmcs in a gist?

AviFS

Why not?!

Bubbler

^

PyGamer0

CMC

its a long cmc

Bubbler

05:12

Are you taking some kind of digital logic class right now?

PyGamer0

no

Bubbler

The CMC is basically DB+CA in binary, outputting exactly three bits

PyGamer0

yes

Bubbler

If I'm allowed to take two arrays [D,B] and [C,A], Extended APL: (3⍴2)⊤+⍥⊥

Vanilla APL: (3⍴2)⊤2⊥+

PyGamer0

Try it online!

Bubbler

05:19

@PyGamer0 Doesn't work for small values

You need .zfill(3) or something

PyGamer0

@Bubbler it works

its 10 + 01

so 11

Bubbler

But the output should be three bits

so 011

PyGamer0

oohhhhhh

Bubbler

> you program should output an array of 3 booleans

lyxal

@PyGamer0 a probably very cursed 10 byte vyxal answer: +BbṅS3↳ð0V

Try it Online!

Bubbler

05:22

Btw int(x,2) is shorter

New Posts

0

Q: Greedy queens sequence

Challenge Implement the "greedy queens" sequence (OEIS: A065188). Details Taken from the OEIS page. This permutation [of natural numbers] is produced by a simple greedy algorithm: starting from the top left corner, walk along each successive antidiagonal of an infinite chessboard and place a quee...

code-golf sequence chess

lyxal

@NewPosts I read that as "greedy greens" at first

and I was genuinely confused for a second

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