The Nineteenth Byte

Maltysen

4:00 AM

@AlexA. i'd rather xkcd.com/378

Alex A.

emಠcs

Geobits

@Downgoat NASA Engineer, Restaurant Division

Downgoat

NERD

D:

Geobits

You act like this is the real world.

Dr Green Eggs and Ham DJ

If you die in the nineteenth byte, do you die in real life?

Maltysen

4:02 AM

> Have you ever had a dream, Neo, that you were so sure was real? What if you were unable to wake from that dream? How would you know the difference between the dream world and the real world?

Geobits

s/Neo/Geo/

Maltysen

hahaha

Dr Green Eggs and Ham DJ

You should change your name to Neobits.

quartata

Has anyone here ever worked with Perl's C API? I'm guessing not

Geobits

Sorry, can't help there :/

quartata

4:04 AM

I thought it a reasonable question. You people seem to have all sorts of hidden talents.

? ok

Downgoat

@QPaysTaxes my good language choices are less real than here

Geobits

@quartata True enough. I know at least one person here can lick dhjeir own elbow.

Downgoat

@QPaysTaxes i don't think you read that correctly

Geobits

^ always worth it

Downgoat

...

quartata

4:08 AM

Ugh, I just realized that'll I have to write more than two lines of JS for this. Morale down.

Downgoat

Why do we bash JS and not Python?

Dr Green Eggs and Ham DJ

Because python > JS

Geobits

I bash python from time to time, but the js defenders are more fun, and there's more wrong with js in general.

Downgoat

@Geobits ;_;

quartata

Because Python is almost perfection except for indentation and speed?

Dr Green Eggs and Ham DJ

4:09 AM

I like the indentation.

Downgoat

@quartata hahahahaha... sure....

Geobits

@quartata See, it's things like that that make me want to bash it more often :P

quartata

i'm not even much of a Python programmer and I admire it. They did so many things right except for multiple inheritance

Downgoat

Javascript beats Python most times in code-golf so JS is better?

quartata

@Downgat Usually the other way around

assuming xnor is the golfer

Downgoat

4:11 AM

Proof pls

quartata

You want me to get links? Too lazy. Just look at any of xnor's submissions

Downgoat

Pls link to profile

Geobits

codegolf.stackexchange.com/users <-- profile here. easily found

Dr Green Eggs and Ham DJ

Man, xnor kicked my ass in python earlier today. By almost a factor of 2.

Dennis

At least ES6 seems to be golfier than Python.

3

quartata

4:13 AM

don't be a lazily evaluated goat

Dennis

6

A: Golfing Class of a language

Elo ratings, treating pairs of submissions as games. I'm using the Elo system here. Essentially, the solution is find the best solutions in each language to each challenge, and then treat each pair of such solutions as a match between those two languages, with the winner being the shorter submi...

orlp

hrm

Geobits

@Dennis It's hard for me to take that list seriously when it shows QBasic better at golfing than either of them ;)

Sp3000

Depends a lot on the type of challenge, but there have been a bunch of times where I find myself trying to shave a few bytes to tie with JS...

orlp

does the minimal NFA that matches all permutations of some set S have less than |S|! states?

I don't believe so

Doorknob

4:15 AM

@Dennis Unsurprisingly, Rust is at the very bottom of that list :D :) :| :( D:

Dr Green Eggs and Ham DJ

@Dennis The real reason that Jelly scores so high on that list is that you're the only one who can use it.

Dennis

Hahaha. There's probably not enough data to get an accurate rating for QBasic.

@DrGreenEggsandHamDJ No, the real reason is that I don't bother with challenges I can't win.

Geobits

@Dennis Yep, and that's the main problem with both rating systems there.

Dennis

Also, isaacg's rating only takes the highest scoring answer in each language into account.

Geobits

@Dennis The funny thing is that there are about a hundred QB answers on the site (60+ of them golfs) :/

Dennis

4:18 AM

Hahaha, BF scores better than C.

@Geobits Wait, seriously?

Geobits

codegolf.stackexchange.com/…

I had no idea either.

Dr Green Eggs and Ham DJ

Hey I just got a code-golf bronze badge!

That's the first tag-badge I've ever gotten on the whole network.

Phrancis

\o/

Dennis

\o/

Anonymous

@Geobits Oh man I bet someone smart pointed that out on those answers

Dennis

4:20 AM

ninja'd

Anonymous

Oh look, someone smart did point that out:

Anonymous

I can spot one fatal flaw in this approach: challenges that would require significantly long code in golfing languages are usually not answered with those languages. For example, as the source of almost all of the Seriously answers, I admit that I usually don't try to answer a challenge with Seriously unless it's under 40 or so bytes (because any longer becomes unmanageable thanks to my poor design decisions). This skews Seriously towards a higher tier than what it probably should be. — Mego Mar 27 at 7:00

Downgoat

@DrGreenEggsandHamDJ congarts! \o/

Phrancis

Is @Dennis a bot?

Geobits

I was quite surprised to see QBASIC in the top tier, until I looked at the QBASIC answers on the site. It's pretty good backup for Mego's comment. I suppose there's probably a somewhat better way to do this, but I'm not really sure it won't be filled with these outliers as well. — Geobits Mar 28 at 2:23

Dennis

4:21 AM

@Mego Such smart. Very self-promotion. Wow.

Downgoat

@Phrancis no

Anonymous

@Dennis r/iamverysmart

Dennis

@Phrancis I'm not allowed to say.

Dr Green Eggs and Ham DJ

@Downgoat congarts More proof that goat hooves aren't great for typing on a keyboard. =P

orlp

@Dennis _UNK

Anonymous

4:22 AM

re: language bashing

Anonymous

I would totally bash on Python if I had things to complain about with it

Downgoat

@DrGreenEggsandHamDJ amazon keeps delaying the shipment on my goat keyboard

Sp3000

Dennis isn't a bot, but Martin is a bot made by Dennis

10

Anonymous

But really my only complaints are Unicode-related, and most of those are fixed in Python 3. The ones that are left are more complaints about Unicode than complaints about Python.

Downgoat

@Sp3000 until Martin became sentient and took over the account

Dr Green Eggs and Ham DJ

4:23 AM

@Downgoat Goat Keyboard:

11

Downgoat

@Dennis please share Martin's source so I can integrated in chatgoat, I'd love for Chatgoat to be a great PPCG mod too...

Geobits

@Mego It took me quite a while to get the [::] crap figured out. It seems quite unintuitive to me even now, but not so bad as at first.

Dr Green Eggs and Ham DJ

@Geobits Yeah, it was a little bit hard for me, but I think having the same concept as range helps.

Downgoat

@DrGreenEggsandHamDJ how do you keep on finding pictures of me :|

Geobits

@Downgoat Alex isn't the only one whose webcam address got out.

Phrancis

4:26 AM

Such abuse of a fine ~~Korg~~ goat

Anonymous

@Geobits The slicing is actually one of the more intuitive parts of the language to me

Dr Green Eggs and Ham DJ

@Downgoat ¯\_(ツ)_/¯

I might be a stalker.

Downgoat

@Geobits oh shit, does that mean you can see that I'm only 179° upside down?

i'm sorry, I'm a fraud

Geobits

@Downgoat I don't want to give away too much.

Anonymous

@Downgoat The real fraud is you using degrees and not radians

9

Dr Green Eggs and Ham DJ

4:26 AM

^

Downgoat

@Mego radiusn foncuse me

Cᴏɴᴏʀ O'Bʀɪᴇɴ

i.imgur.com/7TndUoq.gifv

Geobits

@Downgoat uh

Phrancis

The real fraud is you using 90 degrees to mean you're upside down

9

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@Mego degrees Fahrenheit radian?

Ah.

Well, I gotta go.

Downgoat

4:28 AM

@Phrancis fixed

@CᴏɴᴏʀO'Bʀɪᴇɴ bai

orlp

@CᴏɴᴏʀO'Bʀɪᴇɴ reverse ray tracing?

Dr Green Eggs and Ham DJ

@Downgoat Here's another picture I found of you:

Downgoat

@QPaysTaxes conacten?

@DrGreenEggsandHamDJ ._.

stalker

Phrancis

@Downgoat I should've waited a little longer so 130 seconds would have gone by

Quill

it looks like Factor

Downgoat

4:28 AM

@QPaysTaxes oh yeah ~~I forgot~~, yeah.

Anonymous

He's only π*(1-1/360) radians rotated :P

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@orlp Nothing quite that glorious. Randomly modifying the RGB components by adding a random integer in [5, -10].

Downgoat

@QPaysTaxes ok, night!

Dr Green Eggs and Ham DJ

Bai

Phrancis

@Mego maths!! ~hides

Anonymous

4:29 AM

@QPaysTaxes I haven't looked at it, but that sounds like a problem to be solved by readline :P

Quill

@QPaysTaxes night

DLosc

@Geobits [delayed reaction] About 20 of those QBasic answers are me. It's really good at a few things, and yes, I mainly only use it for those.

aditsu

damn, every time I get away from the chat, the number of new messages has at least 3 digits, usually 4, sometimes 5

Phrancis

Later @QPaysTaxes

Downgoat

2

Sp3000

4:30 AM

@aditsu I've given up on catching up on what I've missed for a while now :/

Alex A.

I stopped about a year ago

Geobits

@DLosc I was just surprised. I know I've seen them around, just didn't know there were so many. Don't get me wrong, I used to use the hell out of QB back in the day ;)

aditsu

me too, but it's still disconcerting

Alex A.

I used to actually read the transcript in here

Sp3000

^ Ditto

Quill

4:31 AM

I don't even read the transcript if I get pinged

aditsu

I usually just page-up to check any interesting pictures

Anonymous

As for the golfing class stuff, I still maintain that it's a futile endeavor to try to rank languages

Anonymous

But perhaps box plots would be more descriptive

Alex A.

I don't think it's useful but I think it's interesting

Geobits

There's no gazing like navel gazing.

aditsu

4:32 AM

I prefer star gazing

Downgoat

42 mins ago, by Downgoat

8 mins ago, by Downgoat

does anyone know how the math would work to insert a moon into a stable orbit? adding extra y-velocity doesn't do it...

pls halp

Geobits

>_>

Anonymous

@Downgoat More description plz

Downgoat

this is very urgent and I hav no idea how to do it

@Mego ok, one sec...

Anonymous

I know physics but I don't know what you mean

Geobits

4:33 AM

Is it Actually urgent? Seriously?

Cᴏɴᴏʀ O'Bʀɪᴇɴ

Anonymous

@Geobits Yeah, if he doesn't get this done in the next 3 days, everyone will die

Alex A.

@CᴏɴᴏʀO'Bʀɪᴇɴ ?

Downgoat

@Geobits yeah

Cᴏɴᴏʀ O'Bʀɪᴇɴ

Random test.

I played around with some code and thought it looked cool

Geobits

4:34 AM

@CᴏɴᴏʀO'Bʀɪᴇɴ Doesn't look very random to me. Looks like a bird.

aditsu

it looks wrong

Alex A.

@CᴏɴᴏʀO'Bʀɪᴇɴ I agree :)

Cᴏɴᴏʀ O'Bʀɪᴇɴ

:D

Anonymous

@Geobits Alex is the definition of random

Anonymous

Also the definition of wrong

Alex A.

4:34 AM

@Mego Lasagna >:O

Geobits

I stand corrected.

Anonymous

I might throw my new mouse and keyboard :(

Downgoat

@Mego Given a planet, with properties describing it's: mass, x, y, x-velocity, and y-velocity, and a moon with the same properties calculate the x-velocity and y-velocity to form an orbit around the planet

Cᴏɴᴏʀ O'Bʀɪᴇɴ

Fiddle for the interested

Downgoat

I already threw my mouse (off my desk that is)

Anonymous

4:35 AM

I got a new wireless keyboard, which is nice except for the fact that it feels wrong (due to being new)

Cᴏɴᴏʀ O'Bʀɪᴇɴ

Now Actually Seriously Bye

Geobits

@Downgoat Perhaps a link to your page would help, so dhje can see what you're working with now?

Dennis

@CᴏɴᴏʀO'Bʀɪᴇɴ Is that a new esolang?

Downgoat

@Mego vihan.org/p/SSS

Maltysen

@Downgoat I told you before, replace the planet with an invisible center

Anonymous

4:36 AM

It came with a new wireless mouse, which is nice because my old one is dying, but it keeps registering dragging when I'm not :/

Downgoat

code: vihan.org/p/SSS/system.es6

@Maltysen it already is

aditsu

@Geobits who is dhje?

Downgoat

the planet is just a rendering

Anonymous

@Downgoat Two-body problem

Anonymous

Two-body problem

In classical mechanics, the two-body problem is to determine the motion of two point particles that interact only with each other. Common examples include a satellite orbiting a planet, a planet orbiting a star, two stars orbiting each other (a binary star), and a classical electron orbiting an atomic nucleus (although to solve the electron/nucleus 2-body system correctly a quantum mechanical approach must be used). The two-body problem can be re-formulated as two one-body problems, a trivial one and one that involves solving for the motion of one particle in an external potential. Since many one...

Maltysen

4:37 AM

@Mego he has discrete time steps

Geobits

@aditsu See, the problem with gender neutral pronouns is that there are 14 competing ones. So, I decided to create my own to unify them all...

Anonymous

@Maltysen Not hard to discretize

Maltysen

@Downgoat then just render the planet-moon system off of that center as the origin

Alex A.

I thought the two body problem was when one body repels the other when that body doesn't bathe

Anonymous

@Geobits Now there are 15 competing ones

Downgoat

4:37 AM

@Mego I don't see what the two-body problem has to do with this though :/

Maltysen

@Mego yeah, I was just saying that it's even easier

aditsu

@Geobits xkcd 927? :p

Geobits

@Mego I'm really going to try to make this one work. It's clearly superior to all other options.

Anonymous

@Downgoat It has everything to do with this. You have two bodies in a time-dependent gravitational potential field. You have one unknown: the velocity of one of the bodies.

Downgoat

@Maltysen I don't want to neglect the sun's gravity

Maltysen

4:39 AM

@Downgoat oh

then there's no point in doing the center thing

Anonymous

If you want to do sun-planet-moon, that's the three-body problem, and that's very hard

Maltysen

@Mego well sun is fixed

Anonymous

@Maltysen That only makes it slightly easier

Maltysen

@Mego but it is solvable

Anonymous

Yeah but it's still not easy :P

Maltysen

4:40 AM

also, he's doing everything discretely, so this stuff doesn't really apply, he just has to add up all the force vectors

@Downgoat ^

Geobits

I still say it'd be easier if render() wasn't being called from logic() >_>

Anonymous

@Downgoat I gave you the formula for orbital velocity last night

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

How many 14ers did I climb? code-golf ascii-art string In mountaneering terminology, a "14er" is any mountain with an elevation of 14,000 feet or more. However, there is another distinction. For a peak to count as a 14er, it must also have a "geographic prominence" of 300 or more feet. This m...

Maltysen

@Downgoat you are using requestAnimationFrame

I knew it

Downgoat

So I solve for velocity?: $dist \cdot velocity ^2 = \frac{4\cdot \pi^2\cdot dist^2}{time^2}$

Maltysen

4:41 AM

its requestAnimationFrame

you can do logic in a setTimeout

Anonymous

v = sqrt(Gm*(2/r - 1/a))

Downgoat

what is a?

Anonymous

Semi-major axis

Downgoat

ok

Anonymous

aka the largest distance the orbiting body gets from the center of mass

Maltysen

4:43 AM

@Downgoat does the initial_velocity start out tangent to the orbit?

Anonymous

That gets you the magnitude of the velocity. The direction is easy, because it's always tangent to the ellipse.

Downgoat

@Maltysen yes

Maltysen

@Downgoat listen to mego, this will allow you to speed up the logic so you can move it out

Ashwin Gupta

Okay, so after almost having to delete my entire repo and start over (since I don't know how to use git even with the gui and windows sucks...) I have finally managed to put my stuff on my gh-pages branch.

Downgoat

oh ok, got it, I'll try this out...

Ashwin Gupta

4:45 AM

Jeez, windows has this dumb Thumbs.db file, it just threw it in my repo and suddenly everything got screwed up.

github.com/niwhsa9/Space-War

can someone tell me, why the effect goes funny

Geobits

thumbs.db strikes again

Ashwin Gupta

the background, the ofset gets messed up, you will see if you click.

Maltysen

@Downgoat btw r is the sqrt of your dist variable (why the hell is that called dist, its dist^2)

DLosc

G'night, all.

Ashwin Gupta

@Geobits I'm so mad at that file right now

Downgoat

4:46 AM

yeah

Maltysen

@Downgoat unrelated: make non-background black, white hurts my eyes

Downgoat

@Maltysen okay

done

Maltysen

\o/

Geobits

Also, makes moons work :P

It's urgent.

Downgoat

they do sometimes

Maltysen

4:51 AM

-.-

Downgoat

I am trying to get them to work using the equations

Maltysen

do what mego said and use the closed forms

Geobits

Oh? I've tried a bunch and haven't found one yet that worked right :(

Quill

Senior JavaScript Engineer

Twitch

javascriptember.js

Twitch is building the future of interactive entertainment, and our web client engineering team is preparing to scale…

Posted on Stack Overflow Careers on March 2, 2016

Anonymous

> do what mego said

Anonymous

4:52 AM

I like the sound of that

Downgoat

@Mego G is grav constant correct?

aditsu

Anonymous

@Downgoat Yep

Alex A.

@Quill ?

Anonymous

And m is the mass of the central body

Quill

4:53 AM

@AlexA. it's unrelated

but twitch is hiring

Downgoat

r is the square root of the distance, correct?

Alex A.

Okay

Maltysen

@Mego @Downgoat usually combine them into one constant

@Downgoat no its just the distance, but for some reason your dist variable is the square of the distance

¯\_(ツ)_/¯

Downgoat

@Maltysen yeah. I know

Alex A.

Downgoat

4:55 AM

so I would do: sqrt(sqrt(square(x1 - x2) + square(y1 - y2)) correct?

aditsu

@Quill javascript -> imgur.com/gallery/b38AI

2

Maltysen

@Downgoat you would do dist = sqrt(dx*dx + dy*dy)

then you wouldn't have stupid variable names

Downgoat

@Maltysen so dist = r?

Maltysen

@Downgoat if you did dist = sqrt(dx*dx + dy*dy), then dist would equal r

Downgoat

ok

Anonymous

4:58 AM

It's a really good thing that you're doing this with Newtonian mechanics and not relativity

Ashwin Gupta

definently not a rickroll

its not

Geobits

My eyes don't know what to do with that at all.

Maltysen

@AshwinGupta nothing is dying, and the background makes me feel like I'm tripping, but other than that, cool game

Downgoat

> SyntaxError: Unexpected token ')'

Quill

@aditsu your message -> me ;-;

Ashwin Gupta

4:59 AM

@Maltysen lol not done

at all...

I haven't even programmed hit effects

or alien AI movement

Senior JavaScript Engineer

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