The Nineteenth Byte

Doorknob

00:02

"Did Bill Gates just fall through the floor?" "That's... kiiinda an issue..." #CodeDay

Tweeted by KeyboardFire on November 8, 2015 at 12:02 AM

feersum

@Doorknob Given your views on Windows, it's not clear why you think this is an issue.

quartata

00:40

Hello

El'endia Starman

Hai

quartata

Wow. tfw you are on a computer that is so old its version of SFTP doesn't support -r.

:/

El'endia Starman

01:03

Just saw this on Facebook. It's great.

Pikachu 🆚 Raichu Anime in Sign Language ピカチュウ🆚ライチュウ手話でアニメ

►

(Note: ASL knowledge/understanding not actually required.)

quartata

Found the bug in FizzBuzz program.

Sadly fixing it brings it up to 33 bytes.

Also prints out "11" at the end for some reason.

Ooh I thought of an instruction that could make it 31 bytes.

Hello @user46915 and welcome to the Nineteenth Byte!

I saw your APL truth machine :)

TheDoctor

01:19

woof sparkfun.com/wish_lists/119040

Doorknob

making progress on the fractal generator :D

El'endia Starman

....I, uh, don't see much difference. :P

I like the first version the most, actually.

trichoplax

This one's much higher res...

TheDoctor

@Doorknob what kinda fractal

El'endia Starman

Anyway, gonna go write.

trichoplax

01:24

Is it a strange attractor?

Doorknob

It's a fractal flame.

quartata

@Doorknob My favorite :D

What are you writing the generator in?

Doorknob

C.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@El'endiaStarman Write code or write literature?

quartata

Using OpenGL for the graphics?

El'endia Starman

01:28

@CᴏɴᴏʀO'Bʀɪᴇɴ Literature.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@El'endiaStarman Cool! Whatcha writing about?

Doorknob

@quartata No, it just outputs the images as a PBM, which I later convert to PNG :P

El'endia Starman

17 hours ago, by El'endia Starman

Tomorrow and Sunday, I'm going to try and write about 12,500 words. I'm participating in NaNoWriMo for the 5th time. :D

quartata

@Doorknob Cool.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@El'endiaStarman Whpa. That's cool.

El'endia Starman

01:28

17 hours ago, by El'endia Starman

Lumien and the Seven Relics

17 hours ago, by El'endia Starman

318 pages, 142421 words at this time.

quartata

@El'endiaStarman Also cool. I participated in NaNoWriMo twice a couple years back. It's really hard...

El'endia Starman

(It's a bit more now 'cause I've done some writing so far today.)

@quartata Especially when poor discipline leads to writing 40,000 words in the last week. :P

Done that twice. Both years that I won.

quartata

@El'endiaStarman hehe

El'endia Starman

Trying to avoid that this time by writing ~12,500 words per weekend.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@El'endiaStarman I know what I'm doing tonight XD

quartata

01:32

I feel like being a rebel and making Rotor's primality test a brute-force <sqrt(n) check instead of Sieve of Eratosthenes

Seadrus

^ you are evil

quartata

Why?

Seadrus

rebels are evil :P

quartata

I mean they have the same time complexity. Sieve just runs better for small numbers.

trichoplax

@Doorknob Interesting read :)

El'endia Starman

01:34

@quartata Sieve of Sundaram is fun to implement.

quartata

@El'endiaStarman I was more trying to think about "what can I implement in 5 minutes so I can post the first batch of catalog answers"

El'endia Starman

Incidentally, my primality testing uses a parallelized version of the Sieve of Sundaram. It's incredibly fast for most numbers because it produces only as many primes as it needs to.

quartata

I guess I'll just content myself with cat, fizzbuzz and Hello World and make the primality testing built in later.

El'endia Starman

@quartata Ahh, right.

I actually need to go update my Minkolang primality testing answer.

Doorknob

@trichoplax I'm surprised we managed to make sense of it. :P

quartata

01:36

TFW

THIS COMPUTER DOES NOT HAVE GIT

ARGHHH

trichoplax

@Doorknob I didn't claim to have made sense of it...

Doorknob

@trichoplax yeah, I meant our group :P

trichoplax

Oh - is this an assignment? I thought you were just experimenting for yourself :)

Doorknob

No, I'm at CodeDay

El'endia Starman

Sieve of Sundaram

In mathematics, the sieve of Sundaram is a simple deterministic algorithm for finding all prime numbers up to a specified integer. It was discovered by Indian mathematician S. P. Sundaram in 1934. == AlgorithmEdit == Start with a list of the integers from 1 to n. From this list, remove all numbers of the form i + j + 2ij where: The remaining numbers are doubled and incremented by one, giving a list of the odd prime numbers (i.e., all primes except 2) below 2n + 2. The sieve of Sundaram sieves out the composite numbers just as sieve of Eratosthenes does, but even numbers are not considered; the...

^ is cool.

trichoplax

01:43

Wow. Could the same advantage be gained again by multiplying by 3, or does the pattern only go this far?

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

Rearrangement Inequality Background The Rearrangement Inequality is an inequality that is based on rearranging numbers. If I have two lists of numbers of the same length, x0, x1, x2...xn-1 and y0, y1, y2...yn-1 of the same length, where I am allowed to rearrange the numbers into the list, a way...

TheDoctor

@El'endiaStarman oooooo

El'endia Starman

@trichoplax I'm fairly sure that this takes advantage of the fact that 2 is the only even prime.

You probably could do something similar for 3 that allows you to get primes by doing 6x-1 and 6x+1, but the extra effort might not be worth it.

trichoplax

@El'endiaStarman I'm curious now, but also sleepy...

El'endia Starman

Oooh, check this out:

Wheel factorization

Wheel factorization is a method for performing a preliminary reduction in the number of potential primes from the initial set of all natural numbers 2 and greater; possibly prior to passing the result list of potential primes to the Sieve of Eratosthenes or other sieve that separates prime numbers from composites, but may further be used as a prime number wheel sieve in its own right by recursively applying the factorization wheel generation algorithm. Much definitive work on wheel factorization, sieves using wheel factorization, and wheel sieve, was done by Paul Pritchard in formulating a series...

quartata

01:51

0

A: 1, 2, Fizz, 4, Buzz

Rotor, 32 bytes >1N2{3%!"Fizz"~5%!"Buzz"N$?~N}\ This has one unprintable, so here's a hexdump: 0000000: 3e31 4e7f 327b 3325 2122 4669 7a7a 227e >1N.2{3%!"Fizz"~ 0000010: 3525 2122 4275 7a7a 224e 243f 7e4e 7d5c 5%!"Buzz"N$?~N}\ Explanation: > Switch to string wheel. 1 Push a one to the...

0

A: "Hello, World!"

Rotor, 14 bytes "Hello, World! Nothing too fancy here. Like Pyth, quotes and most other structures are implicitly closed at EOF. Check out Rotor.

\o/

El'endia Starman

Yay!

Waiting on cat... :P

quartata

@El'endiaStarman Sadly I realized that maliciously crafted inputs (like print "lol") would cause the 0-byte cat program to break since STDIN is evaluated before being put on the stack.

And since I have no other way of taking input currently, cat will have to wait.

El'endia Starman

ahh

quartata

Also I hope you like the explanation.

Took me ten minutes to write

I just noticed that Pyth is 30 bytes. :/

I thought it was 32.

Guess I'm not outgolfing anyone.

El'endia Starman

@quartata Hmm? What about like, most of the other answers? :P

quartata

01:55

It's a hollow victory.

I'm tied with Pip... ugh

Maybe there is a way to golf this down I don't know about.

TheDoctor

i think I broke spotlight search

phase

When your YouTube ad is an ad for the video you're trying to watch.

3

El'endia Starman

AdBlock!

phase

On YouTube app :\

El'endia Starman

ah :/

New Sandboxed Posts

02:06

0

A: Sandbox for Proposed Challenges

Prime Numbers Goal: Take no output and print first 100 prime numbers to STDOUT. All standard code-golf rules are applied. Shortest code in byte wins. Restrictions: No usage of built-in or external methods or functions that returns a prime number. Any suggestions? Thanks.

El'endia Starman

...that sounds like a duplicate.

feersum

On codegolf.stackexchange.com/questions/63256/… I've invalidated 7 answers and counting with the same input.

Hopefully I don't get automatically banned or something for pasting the exact same comment 10 times.

Out of 13 answers on that question, at most 3 were correct.

SuperJedi224

Hello

Doorknob

"Let's malloc(1000000) just to be safe." #CodeDay

Tweeted by KeyboardFire on November 8, 2015 at 2:16 AM

SuperJedi224

Who's KeyboardFire?

Doorknob

02:16

me :P

SuperJedi224

Oh, okay.

phase

What is the policy for untestable answers?

Doorknob

delete on sight?

(link?)

feersum

Answers in unimplemented languages are not allowed.

But there are many other reasons it may be untestable too.

phase

I've got an answer to a question that doesn't work in the current interpreter because it's being rewritten

SuperJedi224

02:19

Just added a factorial example to the esolang article on Microscript

Doorknob

@phase can you link to an old version of the interpreter?

(if it's on Github, for example, you can)

phase

In the answer, I'm using some features from the old interpreter, which aren't implemented in the new one, and some features from the new one, which aren't in the old one.

El'endia Starman

In that case, you probably should finish the new interpreter first.

(Assuming that you're the one writing it.)

Doorknob

Uhm. Does there exist a publicly available version of the interpreter than can run your code?

phase

@Doorknob Old interpreter in Java | New interpreter in C

Seadrus

02:20

here at microsoft, we don't believe in open source

Doorknob

... so that's why they open sourced a large portion of .NET core? >.<

phase

@Doorknob Not currently. I guess I should probably just reimplement the features I need :P

Seadrus

here at microsoft, we don't believe in doorknobs.

phase

@Seadrus like 1000% of F# is open source

Doorknob

@Seadrus D:

SuperJedi224

02:22

@Seadrus What.

Seadrus

here at microsoft, we don't believe in anything but doorknobs. we therefore have desks constructed of doorknobs.

Doorknob

o.o

feersum

I hope you're not going to be one of those people who tries to write an interpreter without knowing what malloc is.

SuperJedi224

@Seadrus But you just said you didn't believe in doorknobs either

Seadrus

here at microsoft, we believe in contradictions.

Doorknob

02:23

@feersum wait who are you talking to?

feersum

@Doorknob phase

El'endia Starman

Seadrus is just not making sense. Like the action his avatar portrays.

phase

@feersum @kirbyfan64sos is doing most of the segfault and memory debugging

Doorknob

oh

phase

I'm just kinda there like "oh wait you forgot to implement this"

Seadrus

02:25

here at microsoft, we don't believe in belief.

SuperJedi224

Well, goodbye for now.

phase

Here at Apple, we have no idea what the hell we're doing without Steve Jobs.

5

Cᴏɴᴏʀ O'Bʀɪᴇɴ

Here at PPCG, we don't give a **** for the outside world.

feersum

11th broken answer found...

El'endia Starman

Probably a fault of the question not including example inputs and outputs that included edge cases.

phase

02:29

@feersum I don't quite believe that over 10 answers are broken...

Cᴏɴᴏʀ O'Bʀɪᴇɴ

Yeah, mine is fixed.

feersum

@phase Test them for yourself. None of the 11 answers I commented on should work for the input falstrue (except ones which have been revised).

phase

@feersum What should be the result?

feersum

falseslaf

phase

@feersum Just tested @Maltysen's answer and it failed on the test, but worked for everything else I could find... pyth.herokuapp.com/…

feersum

02:36

@phase So what? An answer must give the correct result for all inputs, not just some of them.

El'endia Starman

To put it another way, an answer that's 99% correct is wrong. :P

phase

No idea what is happening...

TheDoctor

jetphotos.net/photo/8100297 that is a big plane

phase

@TheDoctor Judging from the length of the runway and the size of the wings, I'd say it's at least oh wait no one cares

TheDoctor

@Doorknob how goes code day?

@phase its an A380 iirc

phase

02:45

@TheDoctor wow

El'endia Starman

@TheDoctor O.O Woah!

TheDoctor

/me needs a new amplifier with less scratchy volume controls

Doorknob

@TheDoctor fractals are very fancy :D

SuperJedi224

'Hoy

TheDoctor

want codes

SuperJedi224

02:48

What for?

Doorknob

@TheDoctor an old version is on Github

^ example output

ok, I pushed all the code I have so far @TheDoctor: github.com/KeyboardFire/cfractal

phase

@Doorknob How are you outputting it?

Doorknob

PBM

converting to PNG with ImageMagick

El'endia Starman

What are you doing that's taking time? I seriously don't see that much difference between the versions you've posted in here.

Like, how are you improving it?

Doorknob

I'm adding different variations and working on command line args and stuff

also, before I was only posting about 1% of the outputs

now they all look at least decent

my friend may or may not be working on a webserver interface

El'endia Starman

02:56

ahhh, okay

Doorknob

(that's why I need command line arguments to work in a friendly manner)

El'endia Starman

uh-huh

cool!

SuperJedi224

It doesn't seem to be working

Doorknob

my code?

run it like make && bin/fractal 1 2 3 6 16 17 > out.pbm && convert out.pbm out.png or something like that

SuperJedi224

Yeah, I compiled it in gnu99 mode (the only mode in which gcc was willing to accept it) and it gives me an error when I run it.

Downloading the makefile so I can try it that way

Cᴏɴᴏʀ O'Bʀɪᴇɴ

03:00

Goodnight everyone!

El'endia Starman

G'night!

Doorknob

@SuperJedi224 oh yeah getopt doesn't work with C99 mode ugh

Works on My Machine™

(maybe clang would work better?)

^ the Disc variation gives interesting results :D

El'endia Starman

ooooh...

SuperJedi224

Error on line 8: Expecting target: Dependencies

Doorknob

wut

SuperJedi224

03:03

I think I got it working.

Compile as g99 and call with 5 numbers.

But there still seems to be a problem with your makefile.

Doorknob

3 mins ago, by Doorknob

Works on My Machine™

SuperJedi224

Wait, I don't seem to have the convert utility.

Doorknob

it's in ImageMagick

if you have an image viewer that can view .pbm you don't need it

Geobits

Every now and then a post comes along that I want to downvote twice. Am I the only one here without a sock or something?

Maltysen

@Geobits who's @Seadrus then?

i thought he was ur sock

Geobits

03:06

Your guess is as good as mine. If I had a sock it wouldn't be so "obvious".

The avatar at least would be the same size and transparent.

SuperJedi224

You should make it print something to the console and terminate instead of producing a "fractal.exe has stopped working" error popup if you provide the wrong number of arguments.

Doorknob

eh not important :P

Maltysen

@Doorknob make isn't working. its telling me to use C99 mode because of for loops implicit delerations

Doorknob

I know, SuperJedi said the same thing

not sure why it works for me, then...

SuperJedi224

C99 doesn't quite work either, use GNU99.

Doorknob

03:12

anyway, usability comes last, because limited amount of time and I still haven't even started a GUI :P

phase

Are you doing this for something or just don't have time to work on it?

feersum

Are fractal flames actually fractals, or are they called "fractals" just to indicate their fanciness?

Doorknob

@phase I'm at CodeDay

@feersum uh not sure about that

feersum

They don't look self-similar.

phase

What is this error and how can I kill it? i.imgur.com/gqb7LwG.png

If I try http://, it just redirects to https://

Maltysen

03:15

@SuperJedi224 do I just put FLAGS=-std=gnu99 at the top of the makefile?

SuperJedi224

@Maltysen I don't know, I've never put together a makefile before.

Maltysen

oh how did u compile it in gnu99 then?

feersum

Probably like gcc -std=gnu99 *.c ?

SuperJedi224

I just called gcc on it directly with the -std=gnu99 flag

Maltysen

oh thanks

feersum

03:25

dammit

this x86 instruction reference causes my LCD to emit an annoying sound

2

phase

first-world-problems

TheDoctor

watching-startalk laughing science-is-cool

SuperJedi224

03:42

Microscript II has now been officially released!

esolangs.org/wiki/Microscript_II

phase

@SuperJedi224 y u no github

Maltysen

@Doorknob i made a snappy 3 minute web interface for you

SuperJedi224

@phase Because, although I do have a github account, I never really got around to doing anything with it for some reason.

Doorknob

@Maltysen my friend already made a web interface :P

phase

@SuperJedi224 Just git add -A , git commit -m "message" , git push https://github.com/SuperJedi224/Microscript2

Maltysen

03:49

doih

phase

@Maltysen how u do dis

I'm rewriting the O IDE in Python, and I suck at Python

Maltysen

do what?

SuperJedi224

Well, goodbye for now I guess.

phase

@Maltysen web interface

Maltysen

oh gist.github.com/anonymous/f673cdde197024f1bbd3

its flask

its really crappy

phase

03:51

looks good to me

steals crappy code

Maltysen

i would gladly write the o web ui for you in python cuz im bored

and python web uis are fun

phase

yeshhh

hold on let me push my code

quartata

My Rotor catalog answers have not been showered in praise like I had expected.

3

phase

@Maltysen Here's the current code. The interpreter is now written in C, and I need to call it from Python. The new IDE needs to basically be this, but translated into Python.

quartata

Blaming @SuperJedi224 for releasing MicroScript II on the same day in 5... 4... 3... 2... 1...

Maltysen

03:55

kk

phase

@quartata no-pics-didnt-happen

Maltysen

oh lol ide.py: import os\nimport sys\n\nif __name__ == "__main__":

phase

@Maltysen That's as far as Python as I go

quartata

@phase Have you considered the benefits of using Groovy

phase

@quartata I love Groovy but haven't had a chance to use it in any projects

Maltysen

03:57

do i just gcc o2.c?

phase

@quartata I was thinking about rewriten PhaseBot in Groovy, but that would just be waisted time.

@Maltysen Yup! (and please do -o o

mınxomaτ

> waisted

Doorknob

hipped

shouldered

quartata

Anyways, I'm going to pretend like no one saw the FizzBuzz answer I spent all day on and post it again

phase

@mınxomaτ How does one do le secret replys?

quartata

03:59

1

A: 1, 2, Fizz, 4, Buzz

Rotor, 32 bytes >1N2{3%!"Fizz"~5%!"Buzz"N$?~N}\ This has one unprintable, so here's a hexdump: 0000000: 3e31 4e7f 327b 3325 2122 4669 7a7a 227e >1N.2{3%!"Fizz"~ 0000010: 3525 2122 4275 7a7a 224e 243f 7e4e 7d5c 5%!"Buzz"N$?~N}\ Explanation: > Switch to string wheel. 1 Push a one to the...

@Doorknob ha ha

@phase That wasn't a secret reply. That was a regular reply.

phase

@quartata But it doesn't have the tag in it

quartata

Mouse over a message hit the arrow thing hit reply

mınxomaτ

@phase Just click the reply button. Not very secret...

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