The Nineteenth Byte

I have a Python library I wrote that has various encodings for esolangs (plus APL and friends). Adding a new encoding is super easy if I have a codepage to reference

ASCII-only

@Mego requested (codepage is there), needs a little specialcasing though: github.com/somebody1234/Charcoal/blob/master/charcoal.py#L4836

user202729

What's this character?

> 👍

Anonymous

1:36 AM

Oh geez

ASCII-only

@Mego also not sure what to do with Charcoal verbose mode

Anonymous

@user202729 Thumbs-up emoji

ASCII-only

@user202729 ~~thumbs up~~ ninja'd because bad internet

Leaky Nun

@orlp wow

I wonder if there is a shorter generator for the natural numbers

Leaky Nun

2:10 AM

?

ASCII-only

@LeakyNun doesn't look like that can be shortened

Leaky Nun

ok

ASCII-only

@LeakyNun nvm

does this work:
https://tio.run/##zVdNbtw2FN7rFK/SolIyHszkP4M4QA0ngywcBBgvCqiCII84thKKEiQqsREE6KoH6BF6gzb3yCFyEffxV6JGdgx0U9kYkiLfD7/3@PGpvuIXFXt4fb1rqhK2FaVky4uKtVCUddVwYFlJct7VlMwgJ7usozwvttzzPE6asmAZbeEQWsJDP4QIDuA@3IMFLOEBPIRH8BiewFN4Bs8hgzN4AS/9eVvTgodR5HlrlIzbecubog4jMwG7qgG0z8D3fc8DfI5gg7IvYGNHL/HPjmS7gRO0fWL6sj2Bd@jNO9OX7Ts4xXf34NSMZHsKb3UbonSk@5luz5Qbb/HvWPeO1atjWOr2gW4f6vaRbh/r9olun@r2mW6fex7uU2/e/435ERQ7sKgkyk4Ar2Bhe8fa20A4Mugv@r5ujX@B9TCwPgbWy8D6GVhPA@trYL0NlL@vsoaSqzeclBjAPkFCv5/wZxD7TUcJdvy84qKpmuK8YH4SeZhIUOCqNMs/ZmxLQjGIVtJGQ3jXMOhVhULNoVgxFz1Mw4qrIXYw5MsZKM3qpepjdm1p1rawJow…

also: link to whatever this is?

also, I wonder why it's T ( S ) instead of T ( B )

saner output format:
https://tio.run/##zVhNbtw2FN7rFK/yomIyFjx2fgdxgBpJBlk4CDBeFFAEQR5xbCYUJYhUnEEQIKseoEfoDdrcI4fIRdxHivqhRnYMdFPZMEmR74ffe/z45HKrLgtxdH29qYoc1gXndK1YISSwvCwqBSLNaabqktMZZHST1lxlbK08s15uu3VSZUWtPM9TtMqZSLmEY5BUBX4ABPbhPtyDA5jDIRzBA3gIj@AxPIGnkMI5PIPnfihLzlRAiOctUTKSoVQVKwPSTsCmqADNCfB93/MAnxNYoewzWHWj5/jTjUy7glO0fdr2TXsKb9Gbt23ftG/hDN/dg7N2ZNozeGPbAKWJ7ae2PW/ceIM/L2zvRfPqBcxte2jbI9s@sO1D2z6y7WPbPrHtU8/DfdrN@@@ET4BtoEMl9ryXacXp9rWiOeLVhynw@wl/BpFf1Zxix88KpZuiYhdM@DHxMJzAcFWSZh9TsaaBHpCFcaCiqq4E9KoCreZYrwh1D5OhUM0QO4jwfAaN5uZl08dgrnkqJSypoFWqiqrRri0nCRNMJUkgKd/MYDmDLnOsD/rRk6…

New Main Posts

4:04 AM

0

Q: Polynominal -> Integrate

Given a polynominal, each coefficient of which is rational, with one argument, output an expression with only 1, definite integral, and variables, that equals to it. E.g. -x2 can be expressed as ∫x∫111dtxdu. E := 1 | var | ∫EEEdvar Reasonable input/output method allowed Samples: Your score ...

ASCII-only

@NewMainPosts this... actually seems kinda nice

user202729

@ASCII-only Although the generated expressions are going to be huge.

ASCII-only

@user202729 depending on the testcases, but yeah

golfy submissions are also probably going to be super slow

user202729

Looks suitable for J...

user202729

9:08 AM

J: Should I use +: -: or *2 /2? Which are more commonly used?

Similarly should I use <: >: or -1 +1?

Neil

9:22 AM

@Downgoat Charcoal, 19 bytes: ＵＴＡθＥθ⁺× ⊘⁻⌈ＥθＬλＬιι

Cows quack

@user202729 depends, in trains especially, your choice would depend on the structure of the train

Lembik

hi all

does anyone understand pari/gp? I am trying to run codegolf.stackexchange.com/a/162281/9206 and get bpaste.net/show/a2c2d02ed481

ASCII-only

9:51 AM

@Lembik try allocatemem(100000000) before?

Lembik

@ASCII-only Thanks! I got there in the end

the manual is very annoying on this topic

ASCII-only

@Lembik :| but it literally says in the error message

Lembik

does anyone know how to divide two very large integers in python to arbitrary precision?

ASCII-only

In the post: "Computing f(11) needs a bigger stack size, the error message will tell you how to increase it. "

Lembik

@ASCII-only it does says "O(^): domain error in O: x <= 0" which is how I worked out the solution :)

ASCII-only

9:53 AM

@Lembik arbitrary precision decimal?

Lembik

yes

ASCII-only

@Lembik there's the decimal module for that

Lembik

@ASCII-only yes but the man page has allocatemem({s = 0}) as its example. Do you know why there is {s = 0} in there?

ASCII-only

@Lembik it also says [hint] you can increase GP stack with allocatemem() >_>

Lembik

I was confused by {s=0} in the man page

pari.math.u-bordeaux.fr/dochtml/html-stable/…

ASCII-only

9:55 AM

@Lembik named argument. that works fine as well

i'm assuming s stands for size here

disclaimer: i have never used pari/gp before, i'm just testing on TIO so i may be wrong

Lembik

ok it doesn't really mean use allocatemem(s=0)?

but rather allocatemem(0)?

I will try to decimal module thanks

ASCII-only

@Lembik they're equivalent, i'm assuming it's defined as allocatemem(s) internally, so you can use or leave out s and it will work fine either way

Lembik

ok but if you use x it actually changes the value of the variable x

In [4]: getcontext().prec = 128

In [5]: Decimal(58377787470904339474720999683301559)/Decimal(5837778747090433947
...: 4720999683301599)
Out[5]: Decimal('0.99999999999999999999999999999999931480787928223354920739123922475877436183925901827778479871118447290751354728222123758017079976')

very nice!

thank you

ASCII-only

googles getcontext().prec = 100 or whatever to set precision

Lembik

it's pretty awesome

orlp

10:20 AM

@ASCII-only Because I was just messing around

the grammar is irrelevant

you can put in whatever grammar you want :)

that's the whole point

ASCII-only

10:32 AM

what not to use a CFG generator for:
https://tio.run/##zVjNbtw2EL7rKabyoRKyVrztocDCa6AGkoUPbQ7uoYBWELQrrpcJRQkiFdswDOTUB@gj9A3avEceIi/iDn/0Q63WMdBLBWNFaYYzw2@GH0eu7uW@5D8@Pe3qsoBtyRjZSlpyAbSoyloCzwqSy6ZiZAY52WUNkzndSk/ri/tOT8i8bKTneZLUBeUZE7AEQWTgBxBCDAms1/AaTuEdlEAgggs4h9SPRMWoDMLQ81Y4IRaRkDWtgrAVwK6sAb1w8H3f8wCvDWSwh0yP92h6B4kdBzgOjdIOnRRA7Djb4EO2sU9bfNgaNRSct4ML82oL7@y9tDpwau@v7X291oMCUnuPPA/DszH7a@6HQHfQLSbxvDdZzcj9lSQFLrMHNfB7gT@D2K8bRnDg56VUt7KmN5T7Segh@EBRK83yjxnfkkA9hAsdQE1kU3PoTQXKzFJpRGqEqSulecQBvIL5DIxl89KMEbkty4SAFeGkzmRZG@vKc5pSTmWaBoKw3QxWM@jybGNQlxJGOo@xf/09xr@KzxL8SxL0yaiQwS…

orlp

@ASCII-only btw you can just use multi character nonterminals :P

ASCII-only

@orlp that's why I'm using them :P ~~but this is PPCG so i'm trying to use them as little as possible~~ that's not a good excuse is it

orlp

also in the original I linked

I intentionally limited it to integers of size 2

ASCII-only

@orlp oh

Lembik

11:01 AM

coding question.. if I have an array of n zeros and I want to put j 1s exactly in the middle (assuming j and n have the same parity)... how would you do that?

ASCII-only

@Lembik what language

Lembik

python

:)

ASCII-only

l = len(a)
a[(l - j)//2:(l + j)//2+1] = [1] * j

or something like that

Lembik

ooh.. let me see

orlp

and when you say "put 1s exactly in the middle"

ASCII-only

11:02 AM

wait

orlp

do you want the new array to be of size n or size n + j?

Lembik

size n

orlp

I'd not be confident in my abilities like ASCII does it

I'd write it like this

mid = l//2
sub_start = mid - j//2
a[sub_start:sub_start+j] = [1]*j

this prevents magical rounding errors

because [sub_start:sub_start+j] always has size j

Lembik

l//2 = int(1.0*l/2) ?

ASCII-only

but if they're both odd wouldn't start be one too high

orlp

11:05 AM

no matter what

@Lembik l // 2 == floor(l/2)

Lembik

thanks

orlp

@ASCII-only possibly

Lembik

now we have to worry if the start is one too high

orlp

yeah i think so

ASCII-only

start = (l - j) // 2

orlp

11:06 AM

yeah

do that

skip mid

ASCII-only

since they have the same parity that's guaranteed to be even

Lembik

thanks.. you made minced meat of this :)

@orlp oh hang on.. what is the final version of your code for putting in the 1s?

ASCII-only

start = (len(a) - j) // 2
a[start:start+j] = [1]*j

@Lembik ^

Lembik

got you

thanks

New Meta Posts

11:39 AM

1

Q: Declined flag on a comment which was copy-pasted into the question's body

Recently, I flagged this comment as no longer needed, since it has been rightfully copy-pasted into the question body. However, the flag got declined along with flags on two other comments which can now be answered by the post itself (1, 2). I have casted numerous flags in similar situations and ...

discussion flags

BMO

Hey! Are there conventions/rules for placing a bounty to draw attention?

Erik the Outgolfer

that's one of the reasons bounties are used

ASCII-only

@EriktheOutgolfer just realized your avatar is PCG

BMO

I'd like to place a bounty for this challenge, but I'm unsure what to say..

I'd love to see either a really high-level answer (eg. the Idris one or a Haskell one) or a really low-level one (eg. asm or C) but these are quite the opposite :S

Erik the Outgolfer

oh, then you don't want that kind of bounty!

BMO

11:49 AM

Should I just leave out the message?

Erik the Outgolfer

you want an indefinite bounty

ASCII-only

*indefinite?

Erik the Outgolfer

@BMO you don't need to

BMO

@EriktheOutgolfer: Oh, forgot about these.. In fact that's probably a good idea

ASCII-only

@BMO but haskell has implicit currying :|

Erik the Outgolfer

11:50 AM

you just post your bounty on the list of indefinite bounties over meta and a bot automatically posts it here

BMO

@ASCII-only: That's why I'd love to see a Haskell answer (it would have to be an input-function on N-tuples)

Erik the Outgolfer

> If your language uses curried functions by default (eg. Haskell), you may expect the input function to be defined over N-tuples, instead of a "higher-order function"

ninja

BMO

:P

@EriktheOutgolfer: I'll offer an indefinite bounty then, thx for the suggestion!

Erik the Outgolfer

btw you can reply to messages if you didn't know

BMO

@EriktheOutgolfer Nope, I didn't know that

totallyhuman

11:55 AM

That shouldn't be too hard, I think.

BMO

@totallyhuman A Haskell answer?

totallyhuman

Yeah.

Then again, the Idris answer is using something Haskell doesn't have...

Angs

@BMO is a Haskell answer even possible? If the function has to be able to use any N-tuple, N has to be fixed

BMO

Ah! I thought tuples can only be of size (max) 15.. but in fact they can be of arbitrary size, just (Eq,Ord,Show) are not defined for >15. But I guess it's still tricky..

totallyhuman

Oh, do we have to use tuples?

Or can we use lists?

ASCII-only

12:01 PM

@totallyhuman lists are fine

BMO

Yeah, that's a good question :)

Erik the Outgolfer

I think Haskell's tuples aren't really one datatype

BMO

@ASCII-only: They are?

Erik the Outgolfer

they are N-tuples, i.e. 0-tuples, 2-tuples, 3-tuples etc.

ASCII-only

well they're basically the same as tuples in Python at least - tuples are just immutable lists

i guess it depends on the language

Erik the Outgolfer

12:02 PM

no, in Python tuples are one datatype for all lengths

BMO

@ASCII-only: But you can't do ["hello", 1984] which is quite different

ASCII-only

@BMO :| that's valid as a tuple in a lot of languages

BMO

As a tuple yes, but a Haskell list would prevent that

totallyhuman

Oh yeah...

BMO

12:15 PM

If I offer a bounty of say 150 to an answer, can I still offer one for 100 later to another answer?

ASCII-only

@BMO nope

BMO

Good to know, I nearly placed two bounties. One for 100 and one 150, but that's impossible then

ASCII-only

Yeah, they have to double at least

Erik the Outgolfer

codegolf.stackexchange.com/help/bounty

BMO

Ok, I just changed it to 100 and 200 but tied the 100 one to the second, st. I will delete it. (I can always repost a new one)

ASCII-only

12:22 PM

oh yeah, not relevant: i had curry for dinner ~1 hour ago

user202729

@BMO Assembly has no concept of function parameter. You have to invent one and then use that, but there are definitions that trivializes the challenge.

Emigna

The help center says that the minimum spend per bounty doubles for each subsequent bounty (with 50 min for the first). Doesn't that mean that you could post 2 bountys for 100 for example, but not 3? It doesn't say that the previous bounty must be doubled.

Erik the Outgolfer

what?

ASCII-only

@Emigna The previous bounty must be doubled, the text is wrong

IIRC

user202729

(yes, I don't like challenges that are unclear for some languages)

Emigna

12:24 PM

@ASCII-only If that is the case, someone should probably update the help center text

user202729

@Emigna Raising the issue on MSE is the only way to get that done... the CMs are not here.

Erik the Outgolfer

and shouldn't be a mod here, but a SE employee

BMO

@user202729 What convention would trivialize it?

ASCII-only

@EriktheOutgolfer so we need to pass the input function a tuple right

Emigna

Ah, I thought we (mods) could update our help center

ASCII-only

12:25 PM

@BMO a convention that places out the args in the correct place

Erik the Outgolfer

we can for some pages, but 1) I don't know if that's one of those pages and 2) it should be fixed for the whole SE

user202729

@user202729 (meta)

ASCII-only

@BMO Haskell's builtin :/

New Bounties With No Deadlines

0

A: List of bounties with no deadline

100 rep for a Haskell answer to "Make me some curry" I'll offer a 100 rep bounty for a Haskell answer to the above mentioned challenge. I might offer more than 100 rep for an interesting answer (for example not just copying the Idris answer or a clever TH answer). Given that tuples are tricky w...

BMO

@user202729 I'm sure for every challenge we'll find a language for which it's unclear.

@ASCII-only Damn, I didn't know about that one. What about N = 33? :P

ASCII-only

12:33 PM

@BMO exactly lol

i guess it's actually possible though

BMO

Sure it is, but I'm not smart enough for this.

Angs

That's as good as it gets I think

BMO

You could use TH to generate an instance "on-the-fly" for functions with N≥32 but that's quite ugly ^^

ATaco

I'm using a version of Lua that is really struggling with floating point arithmetic

To the point where "Why is that number suddenly 6*10^106"

user202729

@BMO Not for those which are defined with only observable behavior.

@BMO No, Template Haskell is the only way (because types can be different)

ATaco

12:40 PM

Oh, and even more interestingly, only sometimes.

Apparently lcm(3,3)=86.9, I never knew.

user202729

@ATaco What's happening...

ATaco

The worst implementation of lua I have ever used.

mınxomaτ

Which one

ATaco

Actually, even standard lua is making this explode towards infinity...

Atleast standard lua makes sense...

user202729

@ATaco It does not correctly implement Lua standard, it's not Lua.

ATaco

12:45 PM

wxLua

The issues appears to exist in my implementation of GCD, I think..?

Alright, lua almost catches the floating point issues, but 0.1%(2%0.1), or more accurately, 2%0.1 pushes it too far.

user202729

@ATaco You have to handle it yourself.

ATaco

Very aware.

user202729

codegolf.stackexchange.com/questions/162290/… '

New Main Posts

1:10 PM

3

Q: Dollar Bill Auction

This is a KOTH challenge for the dollar bill auction game in game theory. In it, a dollar is being sold to the highest bidder. Bids go up in increments of 5¢, and the loser also pays their bid. The idea is that both players escalate the bidding war far beyond the value of a dollar in order to cut...

game king-of-the-hill java

ASCII-only

:| haskell being statically typed makes it so much harder

Anonymous

@ASCII-only Really? I find it easier to use than dynamically-typed or untyped languages

ASCII-only

i meant for BMO's challenge lol

Angs

3

A: Haskell, is it possible to create a curry function that can curry any number of tuple elements

One of the ways to implement such function is to use GHC.Generics. With this approach we don't even need to pass a number of parameters (or tuple size). This works because there is an instance of Generic defined for tuples which effectively converts a tuple into tree structure (of type Rep a) whi...

user202729

> The only limitation of this approach is that Generic is defined only for up to eight-element tuple.

Still special-cased.

ASCII-only

1:19 PM

the main problem is you'll have a function that might return a lambda or the result (i.e two possible return types)

so you'll probably have to metaprogram the curry function itself or something too?

Anonymous

@ASCII-only Change your perspective: any value is just a nilary function that returns itself

Poke

tfw a question like this has to be protected by moderators

Anonymous

@Poke Everyone has an opinion on steak :P

Fatalize

mfw people eat steak well-cooked

Poke

yep. guess so

New Main Posts

1:30 PM

1

Q: Recovering Range Parameters

Description You are given the results of a range function where every element has been rounded down to the nearest whole number. Your goal is to recover the original list. For example, the following function (in Python3) will produce an input for your program: from numpy import arange, floor d...

code-golf

Soaku

Anyone interested in outgolfing my answer? (Important note: it might be impossible to do so)

Anonymous

@Fatalize It depends on the cut of the meat. For example, with a cheap cut, you can do pretty much anything you want to it without hurting the flavor too much, because it's cheap and won't have great flavor anyway. However, cooking a tenderloin well-done is a borderline crime, because it won't be tender anymore, and so you've ruined the whole point of having a tenderloin.

Fatalize

rare > medium > eating actual poop > well-cooked and very rare

^ facts

Dennis

@Mego But I like tenderloin, and I don't like meat that isn't well done.

ASCII-only

@Soaku yes, eventually

still have like ~20? languages to add to RosetTIO, I think

Anonymous

1:36 PM

@Dennis Really? I find tenderloin to be tough and unbearably chewy when cooked anything more than medium

Anonymous

Though like the top answer on that question said, it's probably due to experience. I've only had bad experiences with well-done steaks (my dad wasn't the greatest with a grill), and only good experiences with my usual preference of medium-rare.

Dennis

Don't ask me about the process. No meat my wife prepares could be described as chewy.

J. Sallé

If you come to Brazil and ask for a well done steak basically anywhere, your waiter will probably confirm three times before sending the order

It's just not something that happens

Dennis

Eh, restaurants. I've sent meat back to the kitchen because they wouldn't believe I actually meant well done the first time.

J. Sallé

Medium rare is the temperature I usually go for when making bbq

Medium when mom asks for it

Anonymous

1:41 PM

@Dennis Sous vide perhaps? I've heard good things about that method, but I haven't had the opportunity to try it yet

Dennis

No, nothing that fancy.

Anonymous

Life in Texas:

Anonymous

J. Sallé

@Mego basically any bbq in Brazil

Poke

i just make sure i'm up to 145F to do the fda proud

Anonymous

1:42 PM

Though 8/10 no cross-hatches

J. Sallé

I do the cross-charring(is that a word?) myself because my grill isn't crossed

Laikoni

What happened to the traffic data under site analytics? It only shows traffic since March 25 this year for me, and I'm pretty sure there has been site traffic (and data of it) before this date.

Anonymous

@J.Sallé Mine isn't either. I find that the amount of time it takes to get the crosses done right is about the same amount of time it takes to cook the meat to medium-rare

user202729

@Laikoni Really...? Are you setting the "From" field correctly? Screenshot please?

J. Sallé

@Mego yup, exactly!

Anonymous

1:45 PM

@Laikoni That's weird. File a bug report on meta?

Laikoni

@Mego can you reproduce it?

New Sandboxed Posts

1

A: Sandbox for Proposed Challenges

No "E" code bowling I created this challenege idea with @redwolfprograms. In the challenge, you would create the longest program possible (code-bowling), but it cannot: Contain the letter e, capitalized or not Contain the same alphanumeric character more than twice Conatin the same non alphanu...

Emigna

@Laikoni I only see traffic data from april 6th

and the past 5 days are less than 1% in all stats than the 6 days previous to that

Laikoni

@user202729 ^

@Emigna That's even weirder.

Dennis

@Soaku You can't place a 50 rep bounty on a challenge you've already answered. 100 is the minimum.

ASCII-only

1:52 PM

why can't haskell find replicateM

user202729

@Laikoni why the red lines?

Soaku

@Dennis Oh, fine. Didn't know

user202729

(because there are <5k users around here?)

Reproduced. Traffic on 01 Feb ~ 04 Apr is zero.

Wait, why is page view zero too?

Poke

you folks are reproducing a bug and then commenting on how weird it is that the data you're getting is not what you'd normally expect it to be

that's the weird part

user202729

@Poke {it's very weird} ==> {it's a bug}

ASCII-only

1:59 PM

@ASCII-only nvm i'm stupid

Laikoni

@user202729 As far as I know you're not supposed to share this data.

user202729

Oh yes... but... wait a minute.

What do you use the data for? How is it useful?

Or is it just a part of SE gamification system?

Poke

there's a reason people don't use hitcounters on websites anymore

Dennis

It might be interesting. I haven't found it useful so far.

Poke

i imagine if a change to the website is released you can correlate page hits to the reception of that change, etc

i doubt it's as useful to high privilege users

but maybe those who operate/maintain certain stacks

ASCII-only

2:05 PM

i don't know what i'm doing:
https://tio.run/##jZBRT8IwEMff@yn@ERPbyEaAVyAhhsADEh7wCX0oW8cWu3bZOjQaP/u8jhnR@OAl17R3/7vr/Q6ySpsmkg6TiTIxZngwRlUuTCv2HvSwnm@WD/PlAjuVF1o6tZLVs9IaveCD5Tauteoq8JKqUrEsL2zpsJbmWMujCjt9uFt9pe6scaXV4b01MgYvVaEz@oC6F6w2G9/JYIrYMpCdKkwCfGsox4162chc4er1SrQiLfMF9onVcQn@KHFAMIOriy32J1luIdHH4emsvTQeWbPFDRfY/5E9VU/fMU7tFuC5LEAtF5QUghEwdolu919wHYkOHD@vLVguM796UWbG8cfrLo6xAB/3wUfkQ3LhjUUjJETDwlFJ5q@DqX@lyrQQCEEn4RYBhtRE9uGEgNKVQnIxwAiKs6gVT38Vm7bMz2SFrivwxFqiKUt/vAnSUwC3PtKebywI8GORCG3hGEOMaJeW2jGNENBn/fQvauHAP5vmEw

user202729

^ TemplateHaskell

Dennis

@ASCII-only It won't help at all with the error, but if you use cat <<'end', you don't have to escape every $ in your source code.

AdmBorkBork

2:59 PM

Any final comments before I post this one to main?

user202729

@AdmBorkBork No.

(in this case "no" answers are good as it indicates the challenge is good)

New Main Posts

3:39 PM

2

Q: Four Spiraling Axes

Take the numbers 0, 1, 2, 3, 4, ... and arrange them in a clockwise spiral, starting downward, writing each digit in its own separate square. Then, given one of four distinct and consistent ASCII characters (your choice) representing an axis, and an input integer n, output the first n terms of t...

code-golf number-theory grid

betseg

4:13 PM

> parseInt(0.000001)
< 0
> parseInt(0.0000001)
< 1
> parseInt(0.000006)
< 0
> parseInt(0.0000006)
< 6

5

JS.

Pavel

._.

J. Sallé

Javascript is so satisfying, it makes me realize Java is not so bad after all.

Pavel

Java is the reason we have C#, so that's how I'm fine with it.

New Sandboxed Posts

4:31 PM

0

A: Sandbox for Proposed Challenges

Armored war bots king-of-the-hilljavascript I have seen KOTH challenges where the bots fight each other, and I have seen KOTH challenges where the bots are in an auction. So I came up with this: The challenge: You will create a function using Javascript. You can name the function what you lik...

AdmBorkBork

A dozen, a gross, and a score,
Plus three times the square root of four,
Divided by seven,
Plus five times eleven,
Is nine squared and not a bit more.

A limerick.

Pavel

*clap* *clap* *clap*

AdmBorkBork

Found on the interwebs.

Adám

@AdmBorkBork May we use that?

AdmBorkBork

Not mine. Looks like it came from Tumblr somewhere.

DJMcMayhem

4:40 PM

CMC: Given the number of a hole (1-10, or 0-9 if you want 0-indexing) and a boolean for blow/draw, return the note that would be played on a C Major Diatonic Harmonica

Hole	1	2	3	4	5	6	7	8	9	10
Blow	C	E	G	C	E	G	C	E	G	C
Draw	D	G	B	D	F	A	B	D	F	A

Adám

@DJMcMayhem APL (Dyalog Unicode), 24 bytes ⊃∘(10⍴'CEG')'DGBDFADBFA'

DJMcMayhem

zip("CEG"*10, "DGBDFABDFA").index(arg)?

Adám

@DJMcMayhem Do you mean to ask me how it works?

DJMcMayhem

Yeah. That was my guess of how it works

(in python pseudocode)

AdmBorkBork

PowerShell, 44 bytes, 0-indexed -- param($n,$b)(('CEG'*4),'DGBDFABDFA')[$b][$n] Try it online!

DJMcMayhem

4:47 PM

Hmm, it just occurred to me that this challenge would be significantly harder if a different key was chosen, because then there would be sharps in some of the notes

Adám

@DJMcMayhem Not exactly. 10⍴'CEG' is cyclically reshape into length 10. Now we have ["CEGCEGCEGC","DGBDFADBFA"]. Then ∘ curries that as right argument to the ⊃ (pick) function, which uses the left argument of [Boolean,index] in sequence. First it picks the Boolean'th element, and from that, it picks the index'th element. This is different from n-dimensional indexing.

DJMcMayhem

Hole    1   2   3   4   5   6   7   8   9   10
Blow    A   C#  E   A   C#  E   A   C#  E   A
Draw    B   E   G#  B   D   F#  G#  B   D   F#

Adám

@DJMcMayhem Markdown is hard. :-)

DJMcMayhem

Stupid tabulators

Adám

@DJMcMayhem So Blow-2 is not C-sharp?

DJMcMayhem

4:51 PM

My bad

C, F, and G should all be sharp

@Adám That's interesting. Cool how ⍴ is reshape rather than repeat which is what I would expect

It's like repeat and trim merged together into a single function

moonheart08

7-zip is the best. 809MB of random files i want to archive in only 110 MB of space \o/

Adám

@DJMcMayhem And monadic ⍴ is just re shape. "Replicate" is / which is "Compress" when used with a Boolean left arg. For trimming, there's also ↑ ("Take") which even allows you to "over-take", padding with appropriate fills for your array.

AdmBorkBork

@DJMcMayhem PowerShell, 72 bytes, 0-indexed -- param($n,$b)((('A','C#','E')*4),-split'B E G# B D F# G# B D F#')[$b][$n] Try it online!

Same concept, just uses arrays of strings instead of strings

Adám

Markdown is unpredictable.

J. Sallé

Markdown is like HTML had a baby with satan

2

Adám

4:59 PM

@DJMcMayhem APL (Dyalog Unicode), 40 bytes (⊢,'#'⍴⍨∊∘'CFG')⊃∘(10⍴'ACE')'BEGBDFGBDF'

DJMcMayhem

Noice

Adám

@DJMcMayhem Understand or needs explaning?

DJMcMayhem

I don't understand any APL, but it looks like a fairly straightforward modification of your last answer

Rather than changing the encoded data, you're conditionally adding a #?

Adám

@DJMcMayhem Yes. The left paren is a function. It takes the argument ⊢ and concatenates , the hash reshaped by ⍴⍨ the Boolean for whether the argument is a member of CFG ∊∘'CFG'.

@DJMcMayhem Notice how you can "change tense" of ⍴ "reshape" with the ⍨ "suffix", from "reshapes" to "reshaped by".

Poke

@J.Sallé it sure would be nice if everyone agreed on one flavor of markdown

Dennis

5:11 PM

@mınxomaτ Not enough levels though. :/

Poke

@moonheart08 ye compression in general is pretty good

Adám

@AdmBorkBork APL (Dyalog Unicode), 42 bytes Try it online!

J. Sallé

@AdmBorkBork that's actually from a 1948 maths book by a dude named Leigh Mercer