The Nineteenth Byte

@Phoenix You make it sound like I pinned things to gain an advantage in TeamSpirit, which is certainly not the case (and I know that's not what you meant).

Phoenix

6:40 AM

The thing in question was already pinned when TeamSpirit.js became a thing

Kritixi Lithos

@Mego that's one of the reasons I stopped using the userscript

New Main Posts

0

Q: Maximum Zig-Zag Subsequence

Task Input TestCase Scoring This is code-golf. Shortest answer in bytes wins.

feersum

7:09 AM

Wow, I never realized how stupid Python's import system is.

It's a huge PITA to do anything if you want to have more than one entry point or one that is not on the top level.

Maybe I'll just dump all my files into one directory.

Phoenix

@feersum __import__("foo") ?

feersum

@Phoenix What exactly are you suggesting?

Phoenix

You can make a call to it whereever you want in your program.

feersum

That's not what I'm talking about at all.

Plus, you can use real import statements anywhere else in the program where a statement is allowed.

By the top level I'm referring to directory structure.

ASCII-only

8:39 AM

@feersum docs.python.org/2.5/whatsnew/pep-328.html

feersum

8:56 AM

@ASCII-only Yes? What about that?

ASCII-only

9:12 AM

@feersum Can't you use that for entry points not on the top level

feersum

Not that I can find.

So I have directories A and B.

And I want to run A/a.py, and be able to import B/b.py

I can't find any way to do it

ASCII-only

@feersum So from ..B import b doesn't work?

feersum

The only thing I saw is to add directories to sys.path which is bullshit.

@ASCII-only No.

Python 3, by the way.

ASCII-only

@feersum you have __init__.py under directory B right?

feersum

Yes I copied some __init__s into all the directories.

ASCII-only

9:24 AM

@feersum Well, there appear to be other ways, but they're almost as hacky

@Downgoat 11 but can wait until later

feersum

Some posts claim you can do it with a -m option to the interpreter but it doesn't work.

feersum

9:39 AM

New idea: put directory symlinks to the other directories that are needed

ASCII-only

likt python3 -m A.a?

feersum

@ASCII-only Yes.

Doesn't work.

Another new idea: port everything to C++ because it's probably going to have problems with being too slow anyway.

ASCII-only

@feersum Everything in what

feersum

The repository (acml).

feersum

10:02 AM

HTR>Y<#DCY<#<YIDHDC

My symlink hack seemed to be going swimmingly, but now it mysteriously breaks on circular imports.

ASCII-only

@feersum ?

May be useful

trichoplax

Sounds like you're going to have to implement an import module, to give the default import behaviour you desire. Maybe C++ after all...

feersum

Yeah I've read this page and it sucks.

ASCII-only

Hmm, then I'd go with C++, it's faster plus ACML isn't that large so it won't be too hard to port

feersum

Well that was a joke, it is really true that Python might end up being too slow, but I'm not porting it because of imports.

@trichoplax The problem with this idea is that I can't use my custom import module... until I import it.

trichoplax

10:08 AM

Hmmm

ASCII-only

@feersum make an import package instead :P

feersum

@ASCII-only What do you mean?

Ugh, why do relative imports not work even if all need files are in the same directory

Well this is annoying, now I am going to have to go and delete all this periods I added all over the place.

ASCII-only

make a python package instead, so there will be no import issues

feersum

This is literally worse than #include in C.

@ASCII-only I still don't know what you mean.

ASCII-only

a pip package

feersum

10:20 AM

Well this is probably the only solution that's worse than dumping all my files into one directory, making symlinks everywhere, porting to C++, or writing my own Python preprocessor.

Actually, I have no idea what that entails.

But I'm assuming based on my experience so far :P

New Sandboxed Posts

10:31 AM

0

A: Sandbox for Proposed Challenges

Lexicographically sort a list of numbers This question is inspired by the infuriating default behaviour of Array.prototype.sort() in JavaScript: Convert each element to a string and compare their Unicode code-points. document.write('<pre>' + [4, 2, 5, 1].sort() + '\n' + [42, 6, 10...

aditsu

10:45 AM

@Sp3000 forgot to ask what happened with your B.. 8 wrong tries? must have been quite frustrating

Sp3000

I was trying something really naive for B-small and submitted a rush of attempts/tweaks at the end because I only needed B-small for top 1k

(it was something silly like assigning tickets to coasters arbitrarily at first then swapping them around to reduce the number of coasters)

aditsu

huh, ok.. I thought the problem was not that hard

@Sp3000 are you doing gdcj?

Arjun

@Dennis Okay. Sorry. Won't do again.

Sp3000

@aditsu Not planning to - it's at a pretty late time and I'm not good at distributed code. GL if you're going for it though :)

aditsu

I see, thanks

Kritixi Lithos

11:33 AM

What in the world, there's an area51 proposal for memes

ATaco

Well, it could actually be pretty useful, if taken seriously.

Jan Dvorak

would it include twitch emotes?

ATaco

I suppose it's a type of Meme.

See: :kappa:

Jan Dvorak

Everything is a meme, even "everything is a meme" is a meme :-)

Okx

Jan Dvorak is a meme.

ATaco

11:44 AM

That's a fact.

muddyfish

12:02 PM

:D

Google loves me!

Okx

well done

muddyfish

I have no idea what I did but yay

Kritixi Lithos

Are you playing it?

muddyfish

yep

it's got a time limit apparently

Kritixi Lithos

48 hours, from what I've researched

Are you able to do the challenges?

muddyfish

12:08 PM

yeah

the first one's easy

Kritixi Lithos

nice

muddyfish

everyone here could do it

Jan Dvorak

How do you get that?

muddyfish

I think it's semi random based on your search terms

Kritixi Lithos

it doesn't work if you directly go to the link

muddyfish

12:11 PM

I've tried before :P

Kritixi Lithos

I am madly searching programming-related terms right now :P

muddyfish

:P

I just searched itertools :P

Kritixi Lithos

how many questions are there?

muddyfish

I don't know

I've got to request them

Arjun

@muddyfish In your About me, shouldn't it be far too long rather than far to long?

muddyfish

12:21 PM

@Arjun Fixed :D

I hate that it doesn't give detailed errors though

Apparently it wasn't giving me the type I thought it was

Spend 15 minutes trying to work out why it was giving me a random TypeError

And there are 5 levels

What sort of non disclosure are they trying to get?

Erik the Outgolfer

1:52 PM

@muddyfish I just discovered that this is a way to get a job at Google, not a game!

muddyfish

@EriktheOutgolfer It's both

Erik the Outgolfer

I just went to google.com/foobar and it says that I must've logged in before to log in

muddyfish

It did that to me before but now I think I can sign in because I've done the first level

Erik the Outgolfer

it seems that you must be constantly searching for programming terms to gain access

like not only once but for weeks or something

muddyfish

Well that's kind of normal

Kritixi Lithos

1:56 PM

it's probably done that way to prevent spam

Erik the Outgolfer

@KritixiLithos spam workers at Google?

Kritixi Lithos

no, but people spamming foo.bar to try to get a job

betseg

2:37 PM

I've been Googling programming terms for at least 3 years, but I think it doesn't show the foobar thing because I'm under 18.

Kritixi Lithos

I've got 2-3 years, but Google thinks I am over 18

New Main Posts

0

Q: Name the Hadrons

Challenge Given a quark composition of a particle as input, output the corresponding hadron's name. Quarks will be represented by a capital letter and antiquarks by a lowercase letter. The quarks may be in any order, not necessarily the order given below. Built-in functions the access data ab...

code-golf physics

totallyhuman

uh the question doesn't specify if it is allowed to read from the internet

Leaky Nun

@totallyhuman it's a standard loophole to do so.

Kritixi Lithos

~~reading from the internet is a~~

ninja'd

Phoenix

2:44 PM

CMC: Find any one time Jelly was beaten by what could be considered a practical language.

@Phoenix No.

You jelly?

...that's... what

Practical means not-codegolfing, or really practical?

Okx

Probably pratical as in used in the workspace

Phoenix

2:47 PM

Either that, or intended to be practical e.g. Chedder.

DJMcMayhem

@Phoenix Does vim count?

Kritixi Lithos

Does APL count?

DJMcMayhem

IMO yes

Okx

Found one.

40

Q: Be the First 1 (leave only the first Truthy)

Intro Every year, Dyalog Ltd. holds a student competition. The challenge there is to write good APL code. This is a language agnostic code-golf edition of this year's eighth problem. I have explicit permission to post this challenge here from the original author of the competition. Feel free to...

code-golf array-manipulation logic

Leaky Nun

@Okx well done

Kritixi Lithos

2:54 PM

Here's another:

20

Q: Find the indices of values in one list in another

You must take two lists of positive integers as input, let's call these n and m. You may assume that: All integers in n are part of m All integers in m are unique The lists are non-empty Challenge: Return the indices of where you find the values in n, in m. That might be confusing, but I t...

code-golf number

Phoenix

Cool

Okx

@KritixiLithos get ninjad :P

Phoenix

Forgot APL was a thing that exists.

Leaky Nun

CMC: divide Q into two dense subsets of your choice. Write a program to determine whether a given rational number (numerator, denominator) is in one set or another, producing consistent output. Prove that your two subsets are dense. code-golf

Kritixi Lithos

example?

Leaky Nun

2:57 PM

you need to find it.

it's more of a math challenge though

Phoenix

a->b->(int)a/b==0

Kritixi Lithos

I mean you could technically do something like 2|⌊ 2 mod the ceil of the number

Leaky Nun

@KritixiLithos not dense

@Phoenix not dense

Phoenix

The two subsets being numbers which when floored yeild an even integer or an odd integer.

Jan Dvorak

->n,d{d%2}; to find a limit in even-denominator fractions, perform a binary search; to find a limit in odd-denominator fractions, perform a ternary search.

Kritixi Lithos

2:59 PM

@LeakyNun 1.2, 1.02, 1.002, 1.0002 all fit in the same subset

Leaky Nun

@KritixiLithos do you know what dense means?

not in terms of sets

@JanDvorak well done

Apparantly not.

CMC: given n, return the n-th decimal digit of an irrational number of your choice. code-golf

Jan Dvorak

3:01 PM

@Phoenix A is dense in B iff for every element b in B there is a sequence of elements in A that converges to b

Leaky Nun

@KritixiLithos @Phoenix if a set S is dense in X, then every point in X is either in S or a limit point of S.

Jan Dvorak

@LeakyNun ->n{n.to_s[/^10*/]?1:0}

DJMcMayhem

@LeakyNun I think lD is a valid vim/V solution

(returns the first digit of N)

Erik the Outgolfer

you're joking right?

Leaky Nun

well done both

Okx

3:03 PM

@DJMcMayhem You sure that's irrational?

Leaky Nun

@Okx yes it is

Jan Dvorak

@Okx it changes digits less and less often

Okx

05AB1E, 3 bytes: žs¤ nth digit of pi.

undergroundmonorail

That's really clever.

Leaky Nun

@Okx can be shorter using DJ's method

DJMcMayhem

3:04 PM

@Okx Yeah. .123456789111...222...333....... it doesn't repeat cause each time it comes back to 1 it'll repeat each digit ten times as long.

Jan Dvorak

Port of DJ's solution: ->n{n.to_s[0]}

Leaky Nun

@Okx do you know what irrational means?

Phoenix

I think that (DecimalDigits@N[Pi,#])[[#-1]]& should work.

Okx

Yes, digits going on forever

DJMcMayhem

I'm really proud of my solution. :)

undergroundmonorail

3:05 PM

hmmm

Leaky Nun

@Okx hint: irrational doesn't mean it doesn't have a nice pattern

undergroundmonorail

hmmmmmmmmmmm

Kritixi Lithos

Port of DJ's solution in APL: ⊃⍕

Leaky Nun

@DJMcMayhem it's nice

Erik the Outgolfer

@DJMcMayhem what does lD do (hint: nothing)

Leaky Nun

3:05 PM

people, stop porting solutions.

I would prefer longer solutions over boring solutions

DJMcMayhem

@EriktheOutgolfer One char to the right, delete the rest

Erik the Outgolfer

I don't think that was supposed to mean that you get the irrational as input though...

Leaky Nun

@EriktheOutgolfer what?

Phoenix

@Phoenix Fails in Mathics because it tries to coerce Pi to a standard floating point number for reasons.

Jan Dvorak

->n{2**n%n%10} - I think it's irrational?

Leaky Nun

3:07 PM

oops, @DJMcMayhem it doesn't work for single digits

DJMcMayhem

It doesn't. If the input was 11 for example, it'll delete the second one and print 1

@LeakyNun Yeah, I just realized that now. :(

ñlD should though (not tested)

No, wait I have a better solution that'll work in vim too: xVp

Leaky Nun

nice

Kritixi Lithos

Dyalog APL, 2 bytes: ⍴⍕

Stringifies argument, then gets its length

DJMcMayhem

Nice

Kritixi Lithos

Can be shortened to just ⍴ if the argument is a string instead

Phoenix

3:09 PM

You know how git opens a text editor if you don't specify a commit message in args? That was my friend's first experience with Vim. Somehow. Has not been able to exit yet.

8

Should I help

DJMcMayhem

@LeakyNun Nice CMC btw. :)

Doorknob

@LeakyNun Pyth: e. Input mod 10.

Leaky Nun

@JanDvorak I tend to believe that it works, although I cannot prove it.

@Doorknob nope. It is rational.

Doorknob

It is?

Leaky Nun

It is.

it repeats with a period of 10

Doorknob

3:11 PM

Oh, wait, yeah.

Leaky Nun

@DJMcMayhem thanks

DJMcMayhem

Someone should do it in brain-flak

@KritixiLithos Wouldn't that return a two or more digit number if the input is greater than 999999999?

betseg

@KritixiLithos you think they do? ;)

New Main Posts

1

Q: #Rotate the Roots

Given a nonzero polynomial with integer coefficients and roots that are on the imaginary and on the real line such that if a is a root then so is -a, return another polynomial with the roots rotated by 90 degrees. Details The polynomial can be given in any reasonable format, e.g. as a list of c...

code-golf math polynomials

Kritixi Lithos

@DJMcMayhem oh, um, then take the modulo 9 of it: 9|⍴∘⍕

Downgoat

3:16 PM

@Phoenix nah, he'll/she'll figure it out one day

DJMcMayhem

@LeakyNun Brain-flak port, 7 bytes: ({}<>)

Surprisingly short

I'd love to see a pure arithmetical solution though

Jan Dvorak

require'prime';->n{n.prime?}

Leaky Nun

@JanDvorak well...

undergroundmonorail

nice one

betseg

How do you know that it's irrational? ;)

Jan Dvorak

3:20 PM

@betseg left as an exercise for the reader

Leaky Nun

@betseg if it were rational with period p, then it would mean that there exists a and b such that an+b is prime for all n.

Then, pick a number co-prime with a.

Kritixi Lithos

this could make an interesting challenge on PPCG

Leaky Nun

people would just take the first digit.

Jan Dvorak

too broad

Kritixi Lithos

oh right, it wouldn't encourage unique solutions

Leaky Nun

3:27 PM

I don't think it would be too broad.

Jan Dvorak

Proposal: use CPC for chat popularity challenges and CGC for chat golf challenges

betseg

And CCC for chat code challenges?

muddyfish

@JanDvorak Closed as unclear

Jan Dvorak

@muddyfish what do you want clarified?

muddyfish

I mean those are pretty similar characters

Kritixi Lithos

3:29 PM

CMC: return the middle element(s) of an array

[1,2,3] => 2 and [1,2,3,4] => [2,3] (in whatever format you like)

betseg

What if the array has an even number of elements? (Ninja'd)

Kritixi Lithos

You can also take strings instead

Leaky Nun

Jelly, 4 bytes: L‘Hị

Jan Dvorak

f=->a{a.size>2?f[a[1..-2]]?a}

Doorknob

vim: qqddGddggjjkk@qq@q

Jan Dvorak

3:33 PM

@Doorknob really?

trichoplax

@KritixiLithos Does "middle" mean "the 1 or 2 elements at the centre" or "all the elements that are not endpoints"?

Kritixi Lithos

the first one

Doorknob

@JanDvorak It works for both even and odd length arrays. Probably not for short inputs though, which would require some special casing.

Jan Dvorak

I mean, there are far too many double characters

Kritixi Lithos

@Doorknob Can you do ddG. instead?

And possibly { instead of gg

Doorknob

3:35 PM

Yeah

Kritixi Lithos

And { instead of kk maybe

Doorknob

You could make it work for shorter inputs with :let@q='jjGdd{.@q'<cr>@q

Erik the Outgolfer

@Okx how do you create an array in Fireball?

(btw Leaky's CMC has a really short solution in Fireball)

Kritixi Lithos

V does it in 8 bytes: òHddG.kk (same method as Doorknob's, more or less)

Erik the Outgolfer

lol did I say Leaky's? I meant Kritixi's.

Kritixi Lithos

3:52 PM

Κριτικσι Λίκίς

Adnan

@KritixiLithos Python, 38 bytes: f=lambda x:len(x)<3and x or f(x[1:-1])

Erik the Outgolfer

@KritixiLithos Κριτικσι Λίθος

Riker

13

bad ad placement much?

cc @flawr

from bbc news app on my ipad this morning

Erik the Outgolfer

wtf this is rude

Riker

thank you cpt obvious

Erik the Outgolfer

4:03 PM

@Adnan doing CMCs in Python gets you stars

muddyfish

Gimme stars

Kritixi Lithos

In the bbc android app, whenever I exit the app accidentally (but not close it), the app starts from the beginning again, ie I lose the article/section I was on

Riker

yes, same for me

it's a pita

Erik the Outgolfer

@muddyfish how it always works...

muddyfish

Apparently that technique still works

Kritixi Lithos

4:04 PM

I wish it was a pita, then I would be able to eat it

Riker

kek

Erik the Outgolfer

basically because "he knows we won't give stars for that. give star good joke 10/10"

Okx

@EriktheOutgolfer You wanted to create an array in Fireball? I believe the only way is using ▼ (split) or c (array of chars)

flawr

@Riker I know a bunch of places on reddit that might like this=)

Riker

where?

I've borrowed a friend's acct for r/crappydesign

about to submit to r/funny

r/hmmm maybe?

Kritixi Lithos

4:13 PM

Almost forgot about r/ppcg, it's almost dead

Riker

wot?

oh, huh

TIL that exists

@flawr it can't go on hmmm due to the no text rule. if you have a better place, let me know ;D

nice vote/view pattern

muddyfish

Today I finished my mini steam bot to tell me what things I should buy/sell on the community market

Jan Dvorak

@Riker HNQ

muddyfish

0.6305128496942486 14. Crystals of Time (Booster Average: £0.04, Card Average: £0.03<£0.04<£0.05, Card cost: £0.05, Booster cost: £0.06, Booster Worth: £0.10)
0.6559400247797743 36. Approaching Blocks (Booster Average: £0.04, Card Average: £0.03<£0.05<£0.07, Card cost: £0.05, Booster cost: £0.08, Booster Worth: £0.12)
0.6639889100572243 30. SUPERFIGHT (Booster Average: £0.06, Card Average: £0.03<£0.05<£0.06, Card cost: £0.05, Booster cost: £0.08, Booster Worth: £0.12)

And those were nice chat flags

Kritixi Lithos

and some more

I remember when I couldn't wait to get 10k network rep to be able to see chat flags

Riker

4:22 PM

@JanDvorak yes, I was referring to votes being 1/2 the answers

and then a round number of views

Jan Dvorak

oh

New Meta Posts

4:36 PM

0

Q: Catalogue of Catalogues

I am currently developing a new language and thought that catalogue questions such as Hello, World! and Golf you a Quine for great good are good challenges that a language should be able to do. However, it can be kinda difficult to find all the catalogues as they aren't all linked and not alway...

discussion faq-proposed

Downgoat

Question: does glibc work on windows

Jan Dvorak

Just FYI: you can (and should) golf "question:" down to one character just by appending a question mark (?) to the sentence.

flawr

@Riker /r/unfortunateplacement/

Downgoat

Question: what would you say most important libc function are

flawr

4:56 PM

Question: I think it would be worth adding the default representations of polynomials to polynomials. Is it ok if I edit that in or should I write a meta post first?

Downgoat

Question: what is FILE defined as in C? an Int?

flawr

Question: what is love?

DJMcMayhem

@Dennis Could you mark this question as faq?

31

Q: Definitive policy about answers not meeting the challenge specification

This question has been asked so often, I have no idea what our actual policy is: Almost-correct answers Should answers that break the rules be deleted? Should we flag and delete Not an Answer posts? Can we stop flagging poor answers as "not an answer"? What should count as "not an answer" here?...

discussion policy answers flags faq-proposed

@flawr Baby, don't hurt me

6

Dennis

@DJMcMayhem Done.

DJMcMayhem

That was fast. Thanks!

Downgoat

5:00 PM

@flawr goats

Okx

Question: What is the answer to this question?

Leaky Nun

@Okx 42

Okx

( ͡° ͜ʖ ͡°)

Erik the Outgolfer

@Okx lol your punctuation is completely wrong

Jan Dvorak

PSA: I'm going to ignore any chat message that starts with "Question: ".

Okx

5:03 PM

Question: Do not read this question @JanDvorak

flawr

@JanDvorak Answer: No

Erik the Outgolfer

Question: @JanDvorak you have read this question

Question:@JanDvorak must read this it doesn't start with "Question: "

New Sandboxed Posts

5:31 PM

0

A: Sandbox for Proposed Challenges

Broken Path Detection Challenge Given a plot with broken paths, return the plot with all paths connected in the minimum number of changes. Explanation This problem deals with graphs on the Cartesian plane. Every node has 8 possible edges, extending vertically, horizontally, or diagonally. Eac...

New Meta Posts

5:43 PM

0

Q: default format for [polynomials]

Some languages do not have native ways of representing polynomials, others do. Many times a list of coefficients (in one or the other order) works well. In order to avoid explicitly specifying this over and over again in all polynomials challenge, I'd like add that to the tag info. Please add y...

discussion

TuxCopter

5:53 PM

Do a paint.net plugin from 2006 still works?

Downgoat

Question: how to do UTF8 in C?

do I really have to implement all weird glyph stuffs

TuxCopter

@Downgoat wchar_t

and all other things in wstring.h

Downgoat

but that just is how much space needed for char

TuxCopter

@TuxCopter Nope

Downgoat

is there a way to get the offsets of each glyph/char

@ASCII-only btw do generics work for like: class String<T: StringView = UTF8View>

Btw in terms of public generic classes. If it has a default generic it'll be like @"String" for public String, but public String<Goat> would be @"String.generic.Goat"

TuxCopter

6:24 PM

woah

why

Downgoat

@TuxCopter XD

Erik the Outgolfer

6:42 PM

@TuxCopter 0110011000110011 lol that's so hilarious

can't stop laughing yet...

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