The Nineteenth Byte

Leaky Nun

00:32

https://codegolf.stackexchange.com/search?q=Hopf+map

Eric Tressler

@LeakyNun did you?

Leaky Nun

did I what?

Eric Tressler

did you mean "hour map"?

Leaky Nun

no I didn't

Riker

we do not have any questions on hopf maps that is correct

do you have anohter reason to post that here? just pointing it out for somebody to make a challenge out of?

Leaky Nun

00:35

should we make some?

@Riker precisely

Riker

ah ok

@LeakyNun it was just the lack of that phrase that confuses ~~me when I'm tired~~ people

Riker

01:30

@Mego discord is being weird, but I'll likely be 15 minutes late to the d&d game, my fish tank filter was leaking and I need to move it/clean it

Anonymous

Feedback, anyone?

Anonymous

@Riker Ok

Riker

huh, I was wondering if you were here

@Mego looks good to me (read already)

MD XF

02:35

Do we have a "read a string, increment each character, output the result" challenge?

Or something similar?

Also, do we have a vanilla decision-choice "is it a whole number" challenge?

Thomas Ward

@MDXF if there is... and it's not been done, I have a python solution lol.

but my guess is there would be.

somewhere.

MD XF

Me too, but I couldn't find one.

(If there isn't, I call it.)

Thomas Ward

if you make it they will come :P

"they" being the people up to the challenge. Or the moderators who will squish your post.

not me though :)

Eric Tressler

I wish we could have a tweetable art II

Riker

that would be cool yeah

I can see that being a cool answer-chaining though

MD XF

02:40

@ThomasWard Well, I'm going to search through everything here

Eric Tressler

That was my favorite question here... though I don't really participate in the code golf, so I'm not the target audience

Riker

maybe can only use a subset of ascii, that's not used by the previous submission?

and the 'art' is any 64x64 image, at least 1 pixel changed

Eric Tressler

@Riker I was thinking more along the lines of... now we have 280 characters, what can people come up with in that amount of space? Of course, last time, we had ray-traced buddhabrot and some other fancy things, so it would be hard to beat those

Riker

yea

I was trying to think how can it be changed from popcon to smth else

Eric Tressler

It could be a popcon but for image filters, maybe? You get to load in a 400x400 image in any format you like that doesn't count against your score, or maybe a fixed image that everyone uses

MD XF

02:59

I can't believe it, we don't have one.

Did I leave anything unclear?

Riker

03:20

idea: PPCG plays <x>, like twitch plays smth but only ppcg people

New Main Posts

-1

Q: Is it a whole number?

A number is whole if it is a positive integer with no decimal part. Zero is also a whole number. So 0 and 8 and 233494.0 are whole, while 1.1 and 0.001 and 233494.999 are not. Input A floating-point number in the default base/encoding of your language. For example, the default integer repr...

MD XF

03:32

These comments are amusing

Conor O'Brien

they depress me

MD XF

I find it hilarious that a new user would come and find a highly upvoted answer by a moderator, and decide to have a problem with it

Conor O'Brien

CMC: answer a challenge with a random TIO language. Respond to this message with a link to the answer! :D (Challenge yourself)

Thomas Ward

@MDXF why are we rejecting negative integers as integers

if we take input in as a float, negative numbers are included in Truthy results in most math

floats can be signed after all

nevermind

MD XF

I might've confused whole numbers with natural numbers?

I think I did, the question has been updated

Marcus Andrews

03:46

Is there a shorter way in Ruby to do the following?

g=gets.chop
w=gets.to_i
puts g==?M?w*5/6:g==?F?w*6/5:"UNKNOWN"

this is as far as I got

if g=="M", output 5/6 times w. If "F", 6/5 times w. Otherwise "UNKNOWN"

Conor O'Brien

@MDXF whole = integer >= 0

you should include that in your first sentence

Thomas Ward

@MDXF I would specify in your first sentence that negative numbers are not whole numbers.

I actually had to look this up, but your negative number tests were valid returns. And ym post addresses it :)

in both Py2 and Py3, because I also included the Py3 equivalent of the Py2 in the same answer (slight bytes diff)

bet it could be golfed a bit but meh.

Thomas Ward

04:03

@MDXF input from stdin, or can we just pass it into a lambda to get truthy/falsy output?

Downgoat

CMC: make python dict like {'foo': 'bar', 'goat': 'boat'} into like ('foo', 'bar', 'goat', 'boat') or ['foo', 'bar', 'goat', 'boat']

MD XF

@ThomasWard Default I/O methods allowed.

Downgoat

@ASCII-only :O how you make ubuntu be mac

MD XF

@ConorO'Brien @ThomasWard Fixed.

Thomas Ward

@MDXF well that means my answer is now 21 bytes long, for both Py2 and Py3. Assuming lambdas. :)

i should update that for all your test cases

MD XF

04:09

@ThomasWard :) Edited the question as well.

Thomas Ward

21 bytes in Python, yay.

that's not bad actually :)

@MDXF "non-negative integer" implies no decimals, because that's what an integer is

unless you meant "non-negative number with no decimal part"?

MD XF

Does 'deterministic' mean that the output must be constant for the input?

For example, is outputting 2 for input 2 and 3 for input 3 but 0 for input 1.23 deterministic?

Thomas Ward

@Downgoat you probably know the answer to that

Downgoat

@ThomasWard antecedent-request

Thomas Ward

i meant to MDXF's last question

about what deterministic means :)

i need more drink.

@MDXF remind me how true/false is represented in C again?

because I think your code doesn't work at all

user202729

04:18

True is 1 and false is 0.

MD XF

@ThomasWard 1 for true and 0 for false?

user202729

What happened with this Jelly code? | Try it online!

Thomas Ward

@MDXF then your code doesn't work for simple integers such as '3'

user202729

Why?

MD XF

@ThomasWard I messed up the TIO footer code, not the actual submission

Thomas Ward

04:19

update your TIO link then

MD XF

It's fixed

Thomas Ward

@MDXF still fails for large numbers like 100000000000000

Fail for test case 1e14 (input type = double). (assuming int == int32_t) — user202729 6 mins ago

^ this

MD XF

@ThomasWard because INT_MAX is smaller than that

Thomas Ward

@MDXF then make a note of the limitations in your answer please

MD XF

C can't handle those large of numbers

ok

Thomas Ward

04:21

because your program is only limited to a certain range of actual ints

user202729

C can. By using double.

MD XF

@user202729 oh, so changing float to double in the TIO link will fix that?

user202729

Well, if your program doesn't work for all double value then it is not correct.

Conor O'Brien

who ever said it had to support all input types?

user202729

1e14 is a valid double value, and 1e14f is a float value. (though it is not exactly equal to 1e14)

So what type does @MDXF answer support?

MD XF

04:23

This is getting ridiculous. If any C type could store 1e14 then my submission would work.

Conor O'Brien

he never specified 1e14 as an input value. 1e14 is just a way of generating a number, not the default input type.

user202729

Double can. Float also can.

1 min ago, by user202729

So what type does @MDXF answer support?

Conor O'Brien

yeesh

user202729

@ConorO'Brien Everything in C has its type. 1e14 is of type double. (if you are not familiar with C)

Conor O'Brien

right but that's not provided as input

I am quite familiar with C

(It's my most-used language as of current)

user202729

04:25

You are not understanding my argument. If your answer always return true and it says "only positive integers are provided as input" then it's invalid.

Thomas Ward

@Mr.Xcoder I have to assume that you can't golf my Python down further :p

Conor O'Brien

I'm looking for the relevant meta post regarding extraneous inputs

MD XF

@user202729 You're being rather excessive. My program takes a decimal number as input, not a representation 1e14. And it works for any floating point value that C can support.

That's like saying the JavaScript answer is invalid because it does not support 10^88.

user202729

Try it online!

MD XF

54 mins ago, by MD XF

These comments are amusing

Downgoat

04:28

can anyone help me golf: [e for(k,v)in a.items()for e in(c+k,v)]

user202729

@MDXF See? float does support 1e14. If you don't believe me you can print out the float value, I guarantee that it is an integer with value approximately 10^14.

Thomas Ward

@Downgoat python?

MD XF

@user202729 Wrong

Downgoat

@ThomasWard yes

user202729

@MDXF What now?

Conor O'Brien

04:30

@user202729 You seem to be particularly caught up in syntax. 1e14 is one way of representing a number, but what would normally be inputted is a floating point value, whereas 1e14 has an implicit type outside of the default scope of programs on this site. Asking his submission to support is 1e14 is as valid as asking his submission to accept "100000000000000".

MD XF

@user202729 tio.run/…

It supports inputs up to INT_MAX. If it really makes you happy I'll state that in the answer.

user202729

Ok.

So it support the float values which is ≤ INT_MAX. Which is a relatively small range of float.

MD XF

@user202729 Fixed. See answer.

@user202729 your solution doesn't support 1e14

You should mention that in your answer

:P

user202729

1e14 is 1j14 in Jelly.

MD XF

That's odd

Conor O'Brien

04:41

so is jelly ¯\_(ツ)_/¯

user202729

Oh, my last message was wrong. 1e14 is 1ȷ14 in Jelly. (dotless j)

MD XF

That's even weirder

user202729

Or, shorter, you can enter ȷ14 for 1e14, or j⁴ for 1e16.

Though I'm not sure if the last one work as a literal.

MD XF

Still though, if you expect my solution to support 1e14 because it's "a standard floating point input" I see no reason why yours shouldn't. (Except that I disagree, so I don't care.)

Conor O'Brien

meta says we can invert truthy and falsey right?

MD XF

04:47

We can?!?

Conor O'Brien

idk that's why I'm asking

MD XF

Oh

I wasn't aware of that, but then again I'm rather inactive on PPCG of late

Conor O'Brien

same :P

Anonymous

@ConorO'Brien The relevant meta post has two options with similar scores: any two consistent distinct outputs, or one consistent output for either truthy or falsey and anything else for the other.

Anonymous

Both support allowing inverting truthy and falsey

Anonymous

04:52

So unless the challenge specifically says "output truthy for X and falsey for not X", you can invert them

quartata

is that new? we used to not like that

MD XF

@Mego Output: A truthy value if the input is whole, a falsy value if it is not. does that allow inversion or no?

Anonymous

@MDXF No, but the challenge author may choose to allow it.

MD XF

Ok, just wondering (I'm the challenge author btw)

MD XF

05:25

Does anyone have a handy link to the most recent "struck out 4 is still 4 :(" comment/answer?

Thomas Ward

06:10

@Mr.Xcoder The one time I get to call you out for failing to golf my code... that time is now.

Mr. Xcoder

@ThomasWard Ok... Sorry I guess

betseg

07:58

what is your favorite number? mine is -1/12 because i like natural numbers

user202729

09:57

Anyone here can help me troubleshoot a problem with installing Linux?

NieDzejkob

10:09

@user202729 anytime

user202729

So, I was trying to install Arch Linux by UNetbootin, but it display error askubuntu.com/questions/41930/…

My system: Windows 10 install on C: (NTFS), each partition has at least 10 GB empty space. UNetbootin from C:; 2GB Ram.

Some pages say that the NTFS may be a problem, but because I'm booting from hard disk I can't reformat it as FAT32. Moreover UNetbootin only display C:.

NieDzejkob

what are you putting the installer on?

try using an USB stick

user202729

"Hard disk."

NieDzejkob

if you are trying to use NTFS as the root file system, give up

user202729

So what should I do? Linux doesn't like NTFS? Why?

NieDzejkob

10:16

it's complicated AF and there's only experimental drivers, and there is no POSIX permissions

you'd want a separate partition with ext4 or something similar

also, I wouldn't recommend Arch for a beginner

user202729

"UNetbootin only display C:", and I have 3 partitions, the 2 other ones are FAT32.

NieDzejkob

do you have an USB stick you can put the installer on?

user202729

Probably; but it's also NTFS. The last time I need to put something exceed 2GB on it, and I decide to reformat it.

NieDzejkob

IIRC unetbootin reformats the drive anyway

user202729

That's bad. So I need to backup things on it before using?

NieDzejkob

10:20

@user202729 yup

that's also why using a hard disk is a bad idea - too much to backup. Then when you are actually installing, it's an additional set of headaches

user202729

So the reason why NTFS doesn't work is it is Microsoft-specific. But FAT32 only support things up to 2GB, iirc. What should I do in that case?

Can I backup onto the hard drive? And would install Linux delete other things in the partition?

NieDzejkob

@user202729 FAT32 will work for an installer. You want to have some unpartitioned space for a Linux partition and swap

@user202729 if you don't tell it to, it won't delete stuff. Is this your first time with Linux?

user202729

So... the (USB) which hold the installer must be FAT32, but not necessarily on the partition Linux is installed on? Ok. / Should I make another partition? / ← ok so probably I don't need one.

@NieDzejkob Yes, unfortunately.

Still, backup the USB to the hard drive may be quite time-consuming, any better idea?

NieDzejkob

how much stuff is on the USB? I don't think it'll take THAT long

user202729

1.68 GB.

NieDzejkob

10:33

@user202729 well, you can try to install from harddrive, but then you might need to backup a whole partition, which will take longer, and messing with the bootloader on the main hard drive might end bad...

@user202729 eh, that's fine. I'd expect 5 minutes at most

user202729

Looks like I could find another USB. How much memory would be required?

NieDzejkob

"ISO Size: 523.0 MB" for the newest Arch Linux installer, but you should only go with arch if you are willing to mess around, it's not really recommended for beginners

user202729

Probably I can handle it. Though I'm not sure what will happen to me until I actually try it. If I fail I will use some more beginner-friendly distribution.

NieDzejkob

@user202729 The Arch FAQ puts it that way: "If you are a beginner and want to use Arch, you must be willing to invest time into learning a new system, and accept that Arch is designed as a DIY (Do-It-Yourself) distribution; it is the user who assembles the system.". A normal distro runs an installer which asks questions and copies files, Arch gives you a shell and a manual on what you need to do. It's pretty well written, tho. I think a programmer should be able to handle it.

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

View float numbers in graphical binary IEEE 754 is a well known format for representing floating point numbers. Your task is to give an input to the user where he/she enters a signed float number and represents clearly the number in a color separated by functional area binary 32 bit single repr...

NieDzejkob

10:41

you said you tried to install from C:, can I see what C: looks like, unetbootin could have made a mess

it would also be easier to help you when I could see your current partition layout...

sergiol

hello

0

A: Sandbox for Proposed Challenges

View float numbers in graphical binary IEEE 754 is a well known format for representing floating point numbers. Your task is to give an input to the user where he/she enters a signed float number and represents clearly the number in a color separated by functional area binary 32 bit single repr...

just posted this challenge

what can people suggest me to make it a better question?

user202729

10:59

A better question would be: If the shell is displaying, how can I view the manual?

dir command get:

 Volume in drive C has no label.
 Volume Serial Number is ACD3-4E1D

 Directory of C:\

11/18/2017  04:36 PM    <DIR>          arch
07/10/2015  03:26 PM                10 config.sys
11/18/2017  04:37 PM    <DIR>          EFI
10/24/2017  12:03 PM    <DIR>          FPC
07/08/2017  03:03 PM    <DIR>          Intel
11/18/2017  04:37 PM    <DIR>          isolinux
08/03/2017  10:59 PM    <DIR>          lazarus
11/18/2017  04:37 PM    <DIR>          loader
03/05/2017  01:46 PM    <DIR>          MinGW
09/25/2017  10:53 PM    <DIR>          mingw_dev_lib

Neil

11:27

@Downgoat JavaScript, 28 bytes: o=>[].concat(...Iterator(o))

dzaima

random question: what was the first golfing language to utilise more than the printable characters (i.e. more than ~97 single byte commands or a codepage, ect)?

caird coinheringaahing

12:40

@dzaima I think golfscript uses the control characters from ASCII, if that counts

NieDzejkob

@user202729 it's on the web

caird coinheringaahing

> viewed 10,001 times

\o/

What is the consensus on answers that are in the LQP queue, but the only problem is that they don't meet the challenge spec? Do we VTD?

dzaima

@cairdcoinheringaahing oh huh, I thought golfscript was full ASCII.

Fatalize

12:57

@Mr.Xcoder way better

user202729

13:29

@NieDzejkob Of course it's on the web. But I means it's quite inconvenient to have another device around to read the manual.

NieDzejkob

@user202729 I think it's a live system with a browser, idk. I've never actually installed Arch :P

user202729

Anyone want to crack this? (Reversed Engineered from Uniqueness - CnR)

Leaky Nun

14:34

ᴀʙᴦΔᴇᴢʜΘɪᴋᴧᴍɴΞᴏᴨᴩΣᴛʏΦΧᴪꭥ

@EriktheOutgolfer why no greek small caps in unicode ;_;

Erik the Outgolfer

huh

Leaky Nun

what

you should petition to add it in unicode lol

Erik the Outgolfer

not really interested :p

Leaky Nun

I was trying to make "ἀγεωμέτρητος μηδεὶς εἰσίτω" in smallcaps

Erik the Outgolfer

oh like the harvard entrance?

Leaky Nun

14:36

was it harvard?

wiki says Plato's academy

maybe harvard used it

"ΑΓΕΩΜΕΤΡΗΤΟΣ ΜΗΔΕΙΣ ΕΙΣΙΤΩ" will do

Erik the Outgolfer

I think some american university did that too

Leaky Nun

I see

New Main Posts

0

Q: The Median of Practically Recreational Languages

According to the TIO Nexus there are two types of programming languages: Practical (seen in many corporate environments as a development standard). Recreational (if seen in a corporate environment, you're probably fired). Your Task Mix together one language from each of these realms to achie...

code-golf math array-manipulation multi-program

Erik the Outgolfer

@NewMainPosts that's very fast

Leaky Nun

ᴀᴦᴇꭥᴍᴇᴛᴩʜᴛᴏΣ ᴍʜΔᴇɪΣ ᴇɪΣɪᴛꭥ

Erik the Outgolfer

14:39

there should be omegas instead of squares right?

Leaky Nun

yes

small caps

betseg

i see omegas

update your font

Leaky Nun

btw this:
http://pyth.herokuapp.com/?code=Xz%22%CE%91%CE%92%CE%93%CE%94%CE%95%CE%96%CE%97%CE%98%CE%99%CE%9A%CE%9B%CE%9C%CE%9D%CE%9E%CE%9F%CE%A0%CE%A1%CE%A3%CE%A4%CE%A5%CE%A6%CE%A7%CE%A8%CE%A9%22%22%E1%B4%80%CA%99%E1%B4%A6%CE%94%E1%B4%87%E1%B4%A2%CA%9C%CE%98%C9%AA%E1%B4%8B%E1%B4%A7%E1%B4%8D%C9%B4%CE%9E%E1%B4%8F%E1%B4%A8%E1%B4%A9%CE%A3%E1%B4%9B%CA%8F%CE%A6%CE%A7%E1%B4%AA%EA%AD%A5%22&input=%CE%91%CE%93%CE%95%CE%A9%CE%9C%CE%95%CE%A4%CE%A1%CE%97%CE%A4%CE%9F%CE%A3+%CE%9C%CE%97%CE%94%CE%95%CE%99%CE%A3+%CE%95%CE%99%CE%A3%CE%99%CE%A4%CE%A9&debug=0

is why I like to use Pyth

@EriktheOutgolfer which one looks better?

Erik the Outgolfer

@LeakyNun which one? in both I couldn't see the omegas

betseg

are the delta and the sigmas not small caps or is my font broken?

Erik the Outgolfer

14:42

but I can see the other letters

Leaky Nun

1. minuscule with diacritics
2. minuscule without diacritics
3. majuscule with diacritics
4. majuscule without diacritics
5. pathetic small caps

@betseg there is no small-cap delta and sigma in unicode

betseg

oh

Leaky Nun

if you scroll up, I was complaining about that

betseg

i thought you found no greek smallcaps in that message, then i thought "oh he found them" after you posted the smallcaps text

Erik the Outgolfer

9 mins ago, by Leaky Nun

ᴀʙᴦΔᴇᴢʜΘɪᴋᴧᴍɴΞᴏᴨᴩΣᴛʏΦΧᴪꭥ

betseg

14:44

i thought they all were capitals ;_;

Erik the Outgolfer

also is there a square or an omega in there?

Leaky Nun

omega

betseg

smallcaps omega

Leaky Nun

smallcaps headphone

Erik the Outgolfer

@LeakyNun oh

Leaky Nun

14:45

how do you call the shape of the psi?

tri- something

betseg

neptune's sign

Erik the Outgolfer

trident

@betseg not Neptune's, Poseidon's ;)

betseg

upload.wikimedia.org/wikipedia/commons/4/47/Neptune_symbol.svg eh

planet

Erik the Outgolfer

the greek god is called Poseidon

Leaky Nun

@EriktheOutgolfer how do you Greeks view Greek mythos?

are you required to study them?

Erik the Outgolfer

14:46

yes :/

betseg

our flag, contrary to popular belief, is not based on islam, but gokturk religion

Erik the Outgolfer

but only in grade 3 IIRC

Leaky Nun

interesting

do you have any opinion on it?

Erik the Outgolfer

well, mythology is based on facts, so mythology may or may not be true at any of its parts

Leaky Nun

not of its veracity lol

just general opinion

Erik the Outgolfer

14:49

well, Poseidon is to hate for sure

Leaky Nun

I don't even know who he is

Erik the Outgolfer

a greek deity

(not orthodox christian, ancient greek religion)

there were 12 olympian gods

Mr. Xcoder

@LeakyNun :O 10/10 to Pyth indeed!

Erik the Outgolfer

Zeus, Hera, Athena, Hermes, Ares, Demetra, Poseidon, Estia, Aphrodite, Apollo, Artemis, Hephaestus

Mr. Xcoder

o Greek mythology

betseg

14:55

are the greek and roman mythologies same

Mr. Xcoder

no.

Not even the god names are

Erik the Outgolfer

of them, at the very least Poseidon (god of liquids) and Apollo (god of divination, music, dance, ethos and logic) were more egoist

Mr. Xcoder

Hehe that reminded me of a game... My username there was Poseidown

betseg

neptune is the god of liquids and apollo appears in both mythologies

maybe not the same but similar

Mr. Xcoder

yeah of course similar

Erik the Outgolfer

15:00

hint: whose civilization influenced the romans'?

betseg

greeks? i really dont know anything about history or mythology

Erik the Outgolfer

sure

since the romans took over the greeks, the greeks' culture influenced the romans'

so it shouldn't come as a surprise that the romans' mythology is similar on some parts as well

betseg

while(a = b())
gcc -Wall
warning: suggest parentheses around assignment used as truth value [-Wparentheses]

while((a = b()))
gcc -Wall
[nothing]

what's the difference, if there is any?

Erik the Outgolfer

it's just a warning

but yeah it doesn't make much sense

betseg

well -Wmisleading-indentation is also a warning

caird coinheringaahing

15:25

Aww, did I miss the conversation about Greek mythology?

Mr. Xcoder

yep

Neil

Phew, I managed to outgolf Husk in Charcoal.

caird coinheringaahing

CMC: Given two numbers, convert each to binary, add the digits as though performing decimal addition, then convert the result from base 4

Neil

@cairdcoinheringaahing JavaScript: (a,b)=>parseInt(a.toString(2),4)+parseInt(b.toString(2),4)

@betseg the first one is more easily confused with while (a == b())

betseg

ohhh

Anonymous

15:41

@cairdcoinheringaahing Actually, 9 bytes: ♂├♂≈Σ$4@¿

Anonymous

Convert to binary, convert to integers, sum, stringify, interpret as base-4 int

dzaima

@cairdcoinheringaahing SOGL, 10 bytes: 2{.2─r}+4│

caird coinheringaahing

Jelly, 4 bytes (untested): BSḅ4

Never mind, that's wrong

muddyfish

Pyke, 7 bytes: Fb2b4)s

betseg

@Neil why not ternary

Mr. Xcoder

15:59

@cairdcoinheringaahing Jelly, 6 bytes BḌSDḅ4

caird coinheringaahing

Can someone who knows Python regex tell me why these two regexes match different things: (-?\d*[ᴇ.]?\d*)ı\1$ and ^-?\d*[ᴇ.]?\d*ı-?\d*[ᴇ.]?\d*$

The second one matches ᴇı-. but the first doesn't

dzaima

@cairdcoinheringaahing the first ones \1 expects the 2nd part to be a literal copy of the first parentheses, so the stuff before and after ı need to be the same

caird coinheringaahing

@dzaima Ah, so it references the string, rather than the regex itself?

dzaima

@cairdcoinheringaahing mhm

user202729

Jelly, 6 bytes: (take input as array) BUSUḅ4.

The Us are so annoying... At least they flatten to lowest level which is what we need here.

eaglgenes101

16:23

I'm still creating that code golf compression format, and I've identified a model to go by

ZPAQ

ZPAQ is an open source command line archiver for Windows and Linux. It uses a journaling or append-only format which can be rolled back to an earlier state to retrieve older versions of files and directories. It supports fast incremental update by adding only files whose last-modified date has changed since the previous update. It compresses using deduplication and several algorithms (LZ77, BWT, and context mixing) depending on the data type and the selected compression level. To preserve forward and backward compatibility between versions as the compression algorithm is improved, it stores the...

Switch out the register model for a stack model, reduce header overhead, and inject a few preset models, and I think I could have something rivalling bubblegun while requiring some cleverness to extract minimum length from

*bubblegum

Should I stick with the flat heap model, or should I have a multiqueue model?

Mr. Xcoder

@user202729 Pretty similar to mine, BḌSDḅ4. Nice approach though

caird coinheringaahing

\o/ Levant can (kinda) output Hello, World!

New Main Posts

16:40

-2

Q: Convert to 8051 microcontroller assembly code

#include<reg51.h> #define lcd P1 sbit rs=P3^6; sbit e=P3^7; sbit relay=P0^0; sbit s1=P2^0; sbit s2=P2^1; void delay (int); void cmd (char); void display (char); void init (void); void string (char *); void view (int); int count=0; int no[10]={ 48,49,50,51,52,53,54,55,56,57 }; void delay (int ...

c

dzaima

yay finally overhauled my SOGL keyboard system so now I can either use alt+key or press the key on my other keyboard :D

Andrei Claudiu

hy can anyone help me with httpd

?

Mr. Xcoder

17:02

@cairdcoinheringaahing achievement :D

caird coinheringaahing

@Mr.Xcoder Well, it returns it as a list of characters :P

NieDzejkob

@AndreiClaudiu I don't think this is a topic for The Nineteenth Bytes

Adám

18:02

@Mr.Xcoder APL (Dyalog), 9 bytes +/¨⊢,¨⍳∘⍴

@cairdcoinheringaahing APL (Dyalog), 11 bytes: 4⊥+/2⊥⍣¯1⊢⎕

Mr. Xcoder

@Adám AND YOU SAY APL is not a golfing language :D

Adám

@Mr.Xcoder Yes, as you can see, we need TWO BYTES to sum!

Mr. Xcoder

ಠ_ಠ

how can the rest be so short?

caird coinheringaahing

18:22

It is very fun to zoom in as much as possible on chat on mobile and try to read messages :P

betseg

@cairdcoinheringaahing i tried, monospace fonts borked

Mr. Xcoder

@Downgoat Python 2, 34 bytes lambda d:sum(zip(d,d.values()),())

Or 39: lambda d:[i for k in d for i in k,d[k]]

Python 2, 26 bytes lambda d:sum(d.items(),())

(note that the third one is horrifically inefficient)

caird coinheringaahing

18:44

@Adám Only 2 bytes? Python needs 5! You should be so lucky :P

Mr. Xcoder

@cairdcoinheringaahing And js needs 14... eval(<list>.join`+`)

Unless I am just a beginner which hasn't found the short way yet

feersum

19:08

It's unbelievable how dumb I am, but HOW DO I UPGRADE UBUNTU??

caird coinheringaahing

@Mr.Xcoder 14 plus the length of the list. Poor JS golfers.

Anonymous

@feersum sudo do-release-upgrade

feersum

@Mego I tried that one

Anonymous

Make sure to sudo apt update first

Anonymous

Also what version are you using currently?

feersum

19:12

I did that

Still tyring to find the error message in the scrollback..

15

Ah I'll just do it again

> The required dependency 'apt (>= 1.0.10.2ubuntu2)' is not installed.

Anonymous

382

A: How to install software or upgrade from an old unsupported release?

The repositories for older releases that are not supported (like 11.04, 11.10 and 13.04) get moved to an archive server. There are repositories available at http://old-releases.ubuntu.com The reason for this is that it is now out of support and no longer receiving updates and security patches. ...

Anonymous

That's probably part of the issue for you - 15 isn't a LTS version, so it's in EOL mode

Neil

Why didn't my polynomial plant grow?

its roots were imaginary

Anonymous

slow clap

Adám

@Mr.Xcoder +/¨ sum each of ⊢,¨ each appended to ⍳∘⍴ the indices of the shape

Mr. Xcoder

19:25

@Adám ⍳∘⍴ is toooo neat

Adám

@Mr.Xcoder Yeah ⍳ on a vector is pretty nifty. Even J and Jelly don't do that.

New Main Posts

0

Q: Simplify this polynomial!

Mathematical Background A polynomial in the ring C[x] is written as c0 + c1*x + c2*x^2 + ... for complex coefficients c0, c1, and so forth. We define a simplified polynomial as: A polynomial is in simplified form if there are no terms repeating a power of x. For example, x^2 + 1 is in simplifi...

code-golf math abstract-algebra polynomials

FrownyFrog

@Adám i. works with shape

   i.2 4
0 1 2 3
4 5 6 7

Adám

@FrownyFrog ⍳ makes indices for an array of that shape:

      ⍳2 4
┌───┬───┬───┬───┐
│1 1│1 2│1 3│1 4│
├───┼───┼───┼───┤
│2 1│2 2│2 3│2 4│
└───┴───┴───┴───┘

FrownyFrog

yeah I just checked

nice

Adám

19:34

@FrownyFrog How do you do the above in J?

FrownyFrog

convert to base 4 probably

Adám

@FrownyFrog Ugh.

FrownyFrog

yeah...

Adám

CMC: Given dimensions of an array, return an array of those dimensions where every element is a list of the coordinates for that element. E.g. [2,4] → [[[1,1],[1,2],[1,3],[1,4]],[[2,1],[2,2],[2,3],[2,4]]] and [1,2,2] → [[[[1,1,1],[1,1,2]],[[1,2,1],[1,2,2]]]].

(i.e. APL's monadic ⍳)

Mr. Xcoder

VTC as biased towards APL

Adám

19:40

@Mr.Xcoder Ah, c'mon. APL is disqualified. The idea here is to implement a specific feature from a given language.

Mr. Xcoder

That was a joke :c

FrownyFrog

it's biased towards 1-indexing

Adám

@Mr.Xcoder Yeah, I figured. Anyway, a qualifying APL solution would have to not use that.

@FrownyFrog 0-indexing is fine.

Mr. Xcoder

CMC: Given a binary matrix, output a graph that has it as an adjacency matrix, if possible. I won't provide any test cases.

quartata

can I output the graph as an adjacency matrix

Mr. Xcoder

19:44

@quartata ... obviously not!

Adám

@FrownyFrog Dyalog APL, 12 bytes: ⊢⍴∘↓∘⍉⊢⊤∘⍳×/

quartata

so the challenge is actually converting an adjacency matrix to an adjacency list

Mr. Xcoder

yeah I guess

FrownyFrog

<@#:i.

Adám

@FrownyFrog Nice.

FrownyFrog

19:49

Boxing doesn’t do much good here

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