The Nineteenth Byte

HyperNeutrino

18:00

because in JS you can do dumb things like +[] for 0

caird coinheringaahing

There's Symbolic Python which doesn't use any alphanumeric characters

Riker

@HyperNeutrino that is true

@HyperNeutrino so you're allowed ~[]()01 then

implicit printing at the end of course

HyperNeutrino

but then it's no longer a subset of Python

Riker

CMC: shortest snippets that return the positive integers 1-10 (10 snippets), using only ~0-1

those digits

@HyperNeutrino hm true

HyperNeutrino

JSFuck is valid JavaScript

@Riker 1, -~1, -~-~1, -~-~-~1, etc

Uriel

18:03

@Riker pretty trivial.

@HyperNeutrino and lastly 10

Mr. Xcoder

@HyperNeutrino They might not be the shortest.

Riker

also, cool thing of the day: you can hit opt-number, and then a letter, to repeat that letter in the python REPL <number> times

i.e. opt-1-3 (hit opt-1, then release both and hit 3)

HyperNeutrino

1: 1
2: -~1
3: 1-~1
4: -~1-~1
5: 1-~1-~1
6: -~1-~1-~1
etc

Riker

then a, prints 13 a's

HyperNeutrino

anyway gtg o/

Riker

18:05

o/

Mr. Xcoder

10: 10, 9: 10-1, 8: ~~10-1-1 (this can be shorter)

CMC: Output 3 only using [><]

Riker

js? or brainfuck

Mr. Xcoder

Python, JS, Brainfuck, anything.

Riker

can I use +?

Mr. Xcoder

No.

I don't even know if it possible.

Riker

18:11

don't think so

Mr. Xcoder

(in python). I can output 2, but 3...

Riker

how'd you get 2?

Mr. Xcoder

@Riker Python: [[]<[[]]][[]<[]]<<[[]<[[]]][[]<[]]

Riker

oh, I frogot about bit shiftnig

HyperNeutrino

oh right shifts

LOL

how do you get 3 o_O

Mr. Xcoder

18:14

Ok, so final rephrase: Output 4 only using [<]

@HyperNeutrino You can't.

HyperNeutrino

lol

@Mr.Xcoder [[]<[[]]][[]<[]]<<[[]<[[]]][[]<[]]<<[[]<[[]]][[]<[]]

just yours copied an extra time :D

Riker

also interesting if we can use ()

makes it possible to get anything I think, in JS at least

Mr. Xcoder

@Riker No you cannot. You can work that out with [...][[]<[]]. At least in Python (x) is like [x][[]<[]]

Riker

@Mr.Xcoder I know, but for the sake of getting non-exponents of 2

I'm using JS

Mr. Xcoder

( ͡° ͜ʖ ͡°) Ok I'll allow it

HyperNeutrino

18:16

@Mr.Xcoder actually [x][[]<[]]

Riker

@Mr.Xcoder wut, why the lenny

Mr. Xcoder

@Riker Cuz I changed the rules a thousand times

Riker

lol

Mr. Xcoder

anyway brb

NieDzejkob

Huh? Why is my trivial solution to the dupes-in-a-list CMC starred?

HyperNeutrino

18:18

because people don't know what stars mean ಠ_ಠ /s

Adám

Announcement: An event is starting in 12 minutes in APL - "APL learning session"

Mr. Xcoder

@NieDzejkob Because you ninja'd Thomas Ward presumably

New Main Posts

0

Q: Carve a square from a string

Your challenge today is to take a multiline string, and output the biggest square contained within the string that includes the top left corner. A square string is one where: Each line has the same number of characters The number of characters on each line is equal to the number of lines. C...

HyperNeutrino

18:31

@NewMainPosts why is this so hard in jelly ._.

Mr. Xcoder

@HyperNeutrino Hard?

HyperNeutrino

or at least I tried like 50 different things and all of them do absolutely nothing to the input

got it but it's so long

Pavel

@HyperNeutrino he he he

HyperNeutrino

why strict IO format ;-;

I mean it only adds 2 bytes but still

Pyth beats Jelly!

(waits for Dennis)

Mr. Xcoder

I think the I/O is not that cumberstone

HyperNeutrino

18:36

I mean it's just <split><newchain> but still

Pavel

Not all solutions will need to do split, so you shouldn't get it for free.

HyperNeutrino

i guess

I mean Pyth just reads all STDIN ;-;

Pavel

@HyperNeutrino @Dennis we need your Jelly wizardry

HyperNeutrino

;-; I intentionally didn't ping him because if he's busy I don't want to bother him but oh well you pinged him so ¯\_(ツ)_/¯

Mr. Xcoder

16061 palindrome again :D

Pavel

18:40

eh?

Mr. Xcoder

@Pavel My reputation

Pavel

:41029799 Don't think so, codegolf.stackexchange.com/a/124917/60042

Mr. Xcoder

@Pavel What should the result be for:

a c
def
ghi

Pavel

@Mr.Xcoder Same as the input

Riker

pet peeve: sites that have stupid lists, with like 4 paragraphs per page, and then you need to click next (which loads a whole new page, doesn't just unhide a div) to view the next 4, and every third page is actually an advert

Pavel

18:54

@Riker It's almost like loading the page multiple times allows them to to get paid by advertisers more times for one visit.

Riker

.. I never realized that

Pavel

You're right, annoying af.

Riker

I mean I have ublock on it's not like I see any of them

Pavel

Proposed compromise to websites: You don't show me ads, but you get to run a script that mines bitcoin or something instead.

Riker

honestly, I could probably deal with that on something like wikipedia

NieDzejkob

18:56

@Pavel this has been tried before

Riker

opt-in to use my computer (a set portion, unlimited access is just dumb) to mine bitcoin or smth for it

Pavel

@NieDzejkob I know. I like it.

Riker

@NieDzejkob where? I'm curious

Pavel

@Riker The Scandenavia and the World webcomic.

Other places too, but that's one example.

Riker

I feel like finland would do that

they have public hot tubs iirc

NieDzejkob

18:57

@Riker bfy.tw/EvR7

Pavel

A few places already do it but they don't tell you, and that's just nasty.

@Riker Saunas

Riker

@NieDzejkob I did do that

I was wondering if any major site did that

NieDzejkob

TPB tried

Riker

all I got off of that search was hijacking browsers, I was looking for actually legit ones

NieDzejkob

but they didn't turn off ads, so people got pissed

HyperNeutrino

18:59

Idea: Use people's idle computing power to run parallelized computation and make a major website do parallel computing

my hackathon team tried that in my first hackathon (internet one like 2 years ago) but it didn't work very well xD

NieDzejkob

make it optin or mobile device users will H A T E you

HyperNeutrino

yes :P

if google did that they could probably get places because of how many people use google

muddyfish

Isn't that just SETI at home?

NieDzejkob

BOINC is the term you want

Pavel

@muddyfish SETI? How do you Search for ExtraTerrestrial Intelligence at home?

muddyfish

19:04

@Pavel setiathome.berkeley.edu

Pavel

@xnor 10/10 testcase invalidated 3 answers — Pavel 1 min ago

Riker

@Pavel stare really hard into the sky

Pavel

@muddyfish Cool

HyperNeutrino

@Mr.Xcoder Fixed for that test case for 0 byte difference :D

Pavel

Poll: Would the carve a square challenge be more intresting if spaces were considered holes that shouldn't be part of the square?

(Not that I'd change the rules on that)

DJMcMayhem

19:09

Python question: Can I redefine an class from an imported namespace?

Something like...

import foo

class foo.Bar(foo.bar):
    ...

Thomas Ward

@DJMcMayhem sortof.

take a look at my imaplibext library

Pavel

λ  python
Python 3.6.2 (v3.6.2:5fd33b5, Jul  8 2017, 04:57:36) [MSC v.1900 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> class foo:
...     pass
...
>>> class bar:
...     pass
...
>>> foo
<class '__main__.foo'>
>>> foo = bar
>>> foo
<class '__main__.bar'>
>>>

@DJMcMayhem ^

Thomas Ward

github.com/teward/imaplibext/blob/master/imaplibext/…

Pavel

You can define a class and assign it to the name of the imported class.

Thomas Ward

@DJMcMayhem you'll see that I import imaplib.IMAP4 and redeclare the class as class IMAP4(imaplib.IMAP4): ...

yep

DJMcMayhem

19:10

@Pavel That's... Not what I want. foo.bar must specifically be imported from foo

Thomas Ward

@DJMcMayhem you can't redefine foo.bar

Pavel

@DJMcMayhem Sure, foo.bar = new_class

Thomas Ward

classes can't have . in them

Pavel

@ThomasWard Namespace foo, class bar

HyperNeutrino

You can't do exactly what you wanted but Pavel offers an equivalent method

Thomas Ward

19:11

@Pavel if foo exists already and he wants to redefine bar he needs to have a new namespace and class

and then import that new namespace as foo

then he'd have foo.bar

Pavel

no?

DJMcMayhem

OK, let me be a little more specific

just a sec, typing it out

Thomas Ward

@DJMcMayhem ambiguity is evil :P

DJMcMayhem

class bar():
    def __init__(self, a):
        self.a = a


class bar(bar):
    def __init__(self, a, b):
        super(bar, self).__init__(a)
        self.b = b

a = bar(1, 2)
print(a.a, a.b)

This ^ works.

However, in my case, the original definition of bar is in foo.py

Pavel

@DJMcMayhem Sure, it would work.

Thomas Ward

19:14

@DJMcMayhem then...

DJMcMayhem

I can do class bar(foo.bar), but that creates a new class in the local namespace, not in foo

Pavel

@DJMcMayhem Right, so you do foo.bar = bar afterwards.

DJMcMayhem

Oh

Pavel

I think

DJMcMayhem

Well that's surprisingly simple

If it works, just a sec

Pavel

19:15

I haven't tried that but it should work.

Thomas Ward

and if it doesn't then you have a small problem of having to do additional redefinitions.

DJMcMayhem

@Pavel That works perfectly

Thanks a bajillion

Pavel

Awesome

Np

@ThomasWard I was more concerned about the possibility of the class suddenly extending itself

HyperNeutrino

I just realized that modules are just normal objects

Pavel

@HyperNeutrino Yep.

DJMcMayhem

19:16

Actually, it might be even simpler than that because I could do from foo import *

Pavel

@DJMcMayhem That would also work.

Thomas Ward

@Pavel Well, they each handle their own, I can actually do import imaplibext as imaplib and maintain reverse compatibility with imaplib for the most part. While having imaplibext properly reference imaplib so...

DJMcMayhem

@Pavel Yeah, I'm amazed that super and inheritance is smart enough to let a class inherit from itself, but keep the original around long enough that you can redefine it's constructor while still referencing the original one

Thomas Ward

caveat emptor

HyperNeutrino

CMC: Prove that f:Z->Z is a bijection (the function is a link)

or prove that it isn't

Really you only need to prove that it's surjective because it's obviously injective by definition

oh wait f(1234567890) doesn't exist

Mr. Xcoder

19:21

ಠ_ಠ Because of PPCG I suffer of the What-does-my-code-do? syndrome.

Thomas Ward

lol

HyperNeutrino

@Mr.Xcoder oh I have that and I'd like to blame it on PPCG but really it's just because I write spaghetti code :D

Mr. Xcoder

@HyperNeutrino have time for a bit of JHT?

HyperNeutrino

lol in like 3-4 minutes class is almost over and then I'm going to CS club

Ian Gödel

Hi. Does anyone here know Pyth, I am stuck on something.

Mr. Xcoder

19:26

@IanGödel Just ask, I might be able to help

Ian Gödel

Ok, I want to rotate an array given as input to the left by 1 place, but I get weird results with .<1

Mr. Xcoder

.< takes the list first, then the number. You'd need .<Q1.

Ian Gödel

@Mr.Xcoder Thanks!!! But just curious, why did I get [2, 4, 8, 32, 64] with .<1

Mr. Xcoder

@IanGödel What input did you have? I assume [1, 2, 3, 4, 5, 6]

Ian Gödel

@Mr.Xcoder [1,2,3,5,6] in fact

Mr. Xcoder

19:31

Oh yeah. Because .< #integer# #integer# is bit shift. And .< #integer# #list# vectorizes bit shift.

Ian Gödel

@Mr.Xcoder Like << in C?

Mr. Xcoder

Presumably, yeah.

Ian Gödel

Great thank you

Mr. Xcoder

np

Marcus Andrews

20:30

is there a quicker way to map a base conversion to new chars?

puts gets.to_i.to_s(4).split("").map{|x|['FE','FI','FO','FUM'][x.to_i]}.join("")

this is as far as I got with Ruby

takes the incoming int, converts it to base 4, replaces the numbers with words

Marcus Andrews

20:47

hmm, is *"" the same as .join("")?

HyperNeutrino

@MarcusAndrews In Python?

Marcus Andrews

ruby

HyperNeutrino

ok

Pavel

@MarcusAndrews yes

caird coinheringaahing

21:06

TFW you can do something in /// but not Python

DJMcMayhem

What is the task?

Marcus Andrews

I was working on something that converts a number to base 4 and remaps the numbers to words

e.g. tio.run/##KypNqvz/…

caird coinheringaahing

21:23

@DJMcMayhem Given a flat array and a list of depths, reconstruct the nested array

Marcus Andrews

21:36

so, why the nineteenth byte

nvm apparently there's an explanation for it on other pages XD

orlp

@cairdcoinheringaahing what makes you think you can't do that in Python?

@Mego I didn't know you were married

caird coinheringaahing

@orlp It took me ages to figure out, before caving and using regex and eval. The aim was to do it with array construction though, and I failed :(

New Main Posts

21:54

0

Q: Expand a number

Expand a number Your task is to expand an integer greater than 0 in the following manner: Split the number into decimal digits and for each digit generate a list according to these rules: if the digit is odd, the list starts with the digit and goes down to 1; if the digit is even, the list st...

code-golf number

Adám

22:22

CMP: Are you married?

New Main Posts

0

Q: Alphabet Staircase

The Challenge Your task is to create a program where it outputs the following with no input: a bb ccc dddd eeeee ffffff ggggggg hhhhhhhh iiiiiiiii jjjjjjjjjj kkkkkkkkkkk llllllllllll mmmmmmmmmmmmm nnnnnnnnnnnnnn ooooooooooooooo pppppppppppppppp qqqqqqqqqqqqqqqqq rrrrrrrrrrrrrrrrrr sssssssssssss...

code-golf string alphabet

caird coinheringaahing

@Adám Not yet (hopefully though)

Adám

@cairdcoinheringaahing :-) It is a straw poll; click to "vote".

New Meta Posts

22:44

0

Q: Should I edit a challenge to make it more intresting, if it makes several existing answers no longer optimal?

Specifially This one. Dennis pointed out that the rule that input cannot be an array of lines makes the challenge worse, and I agree with him now. However, the challenge already has several answers, and most of them would become sub-optimal since taking input as a string array would likely be sh...

discussion asking-questions specific-question

Adám

CMC: Given y find an x such that tan(x⁻ˣ) = y. E.g. y = 2.1 → x = 0.8725.

Eric Tressler

what's inside tan()

is that meant to be x^x?

HyperNeutrino

that is xroot(x) I think

Adám

tan(x^-x)

Destructible Lemon

@Adám shouldn't the arrow be the other way round or something since y is the input?

Adám

22:52

@DestructibleLemon Yes, thanks. Fixed.

caird coinheringaahing

Interesting question: When browsing answers, is there a type of answer which (assuming it's correct) you always upvote? Such as answers in a given language, answers of a certain code length etc.

Eric Tressler

@cairdcoinheringaahing anything that mentions the secret word

caird coinheringaahing

I always upvote answers in a) my languages or b) languages that I'm learning, if they have an explanation

@EricTressler I'm torn between taking the bait or not :P

Adám

@cairdcoinheringaahing Probably not always, but I tend to upvote answers that use language features in innovative ways, use non-obvious algorithms, or use "languages" for non-intended purposes.

Uriel

@Adám something tells me there is one language you'd always consider innovative ;P

Destructible Lemon

23:03

@cairdcoinheringaahing am i missing something?

Uriel

talk.tryitonline.net

For general discussion and feature requests regarding tryitonl...

Adám

Dyalog APL solution to my CMC: (3○*∘-⍨)⍣¯1

Eric Tressler

that's almost an emoticon

Uriel

@Adám I just finished typing it in mobile tryapl ⍨

Adám

@Uriel For some reason that doesn't seem to work on TryAPL. Not sure why.

Uriel

23:07

@Adám oh, I use it for symbols, I run the code on tio

Adám

@Uriel OS?

Uriel

@Adám huh?

Adám

@Uriel Which OS does your mobile use?

caird coinheringaahing

@DestructibleLemon Never mind

Uriel

23:25

@Adám Android. Why?

Adám

@Uriel APL Keys

New Meta Posts

0

Q: Why do we count some multibyte characters in the esolangs as single bytes?

For example, this submission written in APL (Dyalog) claims to be 39 bytes. It is 39 characters, but in the TIO link provided in the post (which happens to be an older version that is two characters longer but that does not matter) it says it is 41 characters and 87 bytes. Why does the score coun...

discussion

Uriel

@Adám oh. my phone keyboard already supports more apl keys than my pc's does, and I prefer copying rather than switching kbds. thanks anyways!

Pavel

23:49

@orlp I believe I have requested this feature at least 3 times.

talk.tryitonline.net

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