The Nineteenth Byte

@El'endiaStarman I know you like the mantra of "give the programmer as much power as you can" (which I don't), but I'm curious if you can give me a reason why disallowing numbers in variable names is a bad idea.

orlp

@CᴏɴᴏʀO'Bʀɪᴇɴ well, I assume that one case solves all?

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@orlp well, alone it's a verb. I assume we're not applying the verb yet.

orlp

(+ *) + should just be the result of (+ *) combined with +, no?

Cᴏɴᴏʀ O'Bʀɪᴇɴ

10:04 PM

yes.

orlp

so, what happens when I combine two binary operators?

Nathan Merrill

a ternary is born!

Cᴏɴᴏʀ O'Bʀɪᴇɴ

a new binary verb is created. it's the same thing as doing it regularly - 3 (+ *) 5 = 3 + * 5

orlp

well, 3 + * 5 is meaningless to me

since that was the whole question

what is + *

Cᴏɴᴏʀ O'Bʀɪᴇɴ

operators can be both binary or unary

3 + * 5 = 3 + (* 5)

in this case it uses the unary definition of *

orlp

10:07 PM

then what is the point of the whole verb combining?

Cᴏɴᴏʀ O'Bʀɪᴇɴ

it depends on the number of verbs combined

for example, 3 (- * +) 5 = (3 - 5) * (3 + 5)

orlp

so what is the rule behind it?

Cᴏɴᴏʀ O'Bʀɪᴇɴ

and - - * + = - (- * +) which is just an application

@orlp Let f, g, h be verbs and a, b be numbers. Then, a (f g h) b = (a f b) g (a h b)

orlp

@CᴏɴᴏʀO'Bʀɪᴇɴ yeah, but what is the underlying rule

e.g. that explains to me what to do for 1, 2, 3, 10, 500 operators

Cᴏɴᴏʀ O'Bʀɪᴇɴ

okay

lemme look :P

e is also a verb: e f g h means e (f g h)

d is also a verb: d e f g h means d e (f g h)

and finally

            even:  (a b c ...)    means   hook (a (b c ...))

            odd :  (a b c ...)    means   fork (a b (c ...))

where a, b, c... are verbs

oh wait forks and hooks

           (f g h) y    =    (f y) g (h y)       monadic fork

         x (f g h) y    =  (x f y) g (x h y)     dyadic  fork

           (f g)   y    =       y  f (g y)       monadic hook

         x (f g)   y    =       x  f (g y)       dyadic  hook

orlp

10:18 PM

yeah this is a bit too much for me to quickly implement :P

that's nothing really to do with the parsing part though

quartata

Here's how I think you could parse this super easily. First have class Verb and subclasses Hook and Fork, which store their associated char and any arguments or adverbs, as well as class Datum.

Then take your line of code remove the whitespace and split/tokenize appropriately

Mars Ultor

@NathanMerrill Well, then you cant have class graphics3d and class graphics2d

quartata

Then, take your list of tokens and iterate through it.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

huh

orlp

@quartata the grammar I gave is correct I believe

the parsing is no longer the problem

quartata

10:24 PM

if the arity of the token is 0 create a new Datum out of it, place it in a list and note the index of it in another array. Otherwise create a verb and pace it in the list

orlp

the problem is now taking the parse and attaching behavior to it :)

quartata

@orlp Oh, nevernind then

Cᴏɴᴏʀ O'Bʀɪᴇɴ

okay

quartata

I'm on mobile anyways so I'm hppy I do not hve to type this all out

Cᴏɴᴏʀ O'Bʀɪᴇɴ

XD

quartata

10:26 PM

stupid a key

Cᴏɴᴏʀ O'Bʀɪᴇɴ

yh

orlp

> yh

ftfy

Cᴏɴᴏʀ O'Bʀɪᴇɴ

no more ''

New Main Posts

1

Q: Calculate the Gamma function for half-integer arguments

Gamma function is defined as It is a well-known fact that for positive integers it coincides with a properly shifted factorial function: Γ(n) = (n - 1)!. However, a less famous fact is Γ(1/2) = π1/2 Actually, the Gamma function can be evaluated for all half-integer arguments, and the res...

Mars Ultor

We're doing pngrmmtic lipogrms now?

Helka Homba

10:27 PM

@phase Did you still need Owk whitelisted for PPCGMC?

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@MarsUltor yeah

quartata

@NewMainPosts dupe I think

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@CᴏɴᴏʀO'Bʀɪᴇɴ why delete?

Cᴏɴᴏʀ O'Bʀɪᴇɴ

I think I misred the question

quartata

Oh, nevermind.

Eᴀsᴛᴇʀʟʏ Iʀᴋ

10:29 PM

yeah

We have one with no builtins, just not with builtins.

quartata

No this is different

Alex A.

@EᴀsᴛᴇʀʟʏIʀᴋ i.e. we have the interesting version and now the uninteresting version?

Cᴏɴᴏʀ O'Bʀɪᴇɴ

:P

quartata

Let's see if I can beat Dennis to a M solution

Cᴏɴᴏʀ O'Bʀɪᴇɴ

"M"?

Eᴀsᴛᴇʀʟʏ Iʀᴋ

10:30 PM

Q_Q riker.com is taken...

@AlexA. yeah.

:(

Alex A.

@CᴏɴᴏʀO'Bʀɪᴇɴ Dennis' other golfing language

Is it new?

^

no not really

or very old

10:31 PM

The name is a reference to a German film so only like 3 people in the world will get the reference

Adnan

Isn't M the same as Jelly but specialized in precision?

Alex A.

It's newer than Jelly

Cᴏɴᴏʀ O'Bʀɪᴇɴ

I've never heard/seen it

Adnan

m.tryitonline.net

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@AlexA. cough cough

Alex A.

10:32 PM

It's on GitHub somewhere and has been used, however infrequently, here

Helka Homba

@EᴀsᴛᴇʀʟʏIʀᴋ you are "HecarimIsBeast" right?

Eᴀsᴛᴇʀʟʏ Iʀᴋ

...no

quartata

it has rationals which is why it'll be good here

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@HelkaHomba I am EasterlyIrk.

Helka Homba

in minecraft

Eᴀsᴛᴇʀʟʏ Iʀᴋ

10:33 PM

in mc, yes

orlp

@HelkaHomba what do you think of my rainbowlify formula?

Eᴀsᴛᴇʀʟʏ Iʀᴋ

EasterlyIrk in both.

I used to be brikerw in mc, but changed my name.

who is HecarimIsBeast?

@Downgoat can you help give Irkbot a brain?

Downgoat

@EᴀsᴛᴇʀʟʏIʀᴋ you could use Chatgoats brain

quartata

@EᴀsᴛᴇʀʟʏIʀᴋ Ask Geobits for one of Marky's brains. They're in Python with tensorflow

Nathan Merrill

@MarsUltor oooh, good use case

Helka Homba

10:39 PM

@EᴀsᴛᴇʀʟʏIʀᴋ Your mc name is EasterlyIrk?

Downgoat

@quartata if irkbot uses Marky, I'm banning it... I cant have a homicidal AI running around Slack

quartata

@Downgoat Chatgoat is written in JS so he can't really use it. Plus Marky's old brain was pretty normal.

Mars Ultor

@Everyone halp should I make my JS class-based or function-based?

quartata

This new brain is based on movie quotes which is why he's a little nuts

@MarsUltor If you're using js for OO you're doing it wrong

Mars Ultor

@quartata ?

Why?

@Downgoat help

quartata

10:44 PM

a. js uses prototypes which are weird b. the whole point of js was it was supposed to bring scheme to the web which is why its functional tools are more powerful

Mars Ultor

@quartata But JS OOP is still really good

quartata

what are you making anyways

Downgoat

^^

Mars Ultor

Some canvas stuff

quartata

@Downgoat you just said a couple days ago you hated prototypes make up your mind jeez

Cᴏɴᴏʀ O'Bʀɪᴇɴ

10:46 PM

@quartata no wonder I like JS so much

functional ftw

quartata

It isn't really all that functional but it has more functional to it than most imperative lnguages

Cᴏɴᴏʀ O'Bʀɪᴇɴ

Chat mini challenge: given two integers input in a convenient format, output the reduced fraction form. E.g., 30, 90 => 1, 3 and 300, 300 => 1,1

Downgoat

@quartata yeah i do

New Main Posts

0

Q: Strings from 'a' to '999'

The task is to generate all the strings from 'a' to '999' including upper case characters like so: 'a','b','c' ... 'y', 'z', 'A', 'B', 'C' ... 'Y', 'Z', '0', '1', 2' ... '8', '9', 'aa', 'ab', 'ac'... 'az', 'aA', 'aB'... 'aZ', 'a0' .. 'a9', 'ba' and so on (filling in the gaps). Input: The amo...

code-golf string number array-manipulation

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@quartata o_o I probably wont be using any langs less functional than javascript. I am a functional prorammer.

Mars Ultor

10:48 PM

is 200% a OOP programmer

ArtOfCode

Human, 9months+18years: input 30,90 => 1,3

Cᴏɴᴏʀ O'Bʀɪᴇɴ

2143543523 and 234095235?

quartata

@CᴏɴᴏʀO'Bʀɪᴇɴ by the way did I mention to you the glories of racket

Alex A.

@MarsUltor Pure Object Oriented Programming

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@quartata what's that racket? :P never heard of it

quartata

10:49 PM

its a scheme flavor

it's so up your alley

you'll like it better than haskell

Cᴏɴᴏʀ O'Bʀɪᴇɴ

ooo

link?

quartata

racket-lang.org

Cᴏɴᴏʀ O'Bʀɪᴇɴ

thank god it has regex

quartata

good regex too. pcre

Cᴏɴᴏʀ O'Bʀɪᴇɴ

:o

I need to learn pcre now

so wait it has ;; for comments?

and you can define HTML with it? wow

quartata

10:54 PM

It has a couple different comment symbols. #; is another

Cᴏɴᴏʀ O'Bʀɪᴇɴ

huh. what else?

quartata

I'll show you the ropes later

Cᴏɴᴏʀ O'Bʀɪᴇɴ

ok

I'm reading their quick tutorial thingy

> After all, a picture is worth five hundred “hello world”s.

mınxomaτ

Not a day goes by where I don't get the urge to slap a Realtek developer in the face.

Mars Ultor

@CᴏɴᴏʀO'Bʀɪᴇɴ ES6, 51 bytes: f=m=>n=>[m,n].map(_=>_/(a=>b=>b?f(b)(a%b):a)(m)(n))

Cᴏɴᴏʀ O'Bʀɪᴇɴ

10:58 PM

wow, way to curry

Mars Ultor

@CᴏɴᴏʀO'Bʀɪᴇɴ IDK if it works, posted using IE

Cᴏɴᴏʀ O'Bʀɪᴇɴ

lemme check, and wow

nope

[NaN, NaN]

Mars Ultor

oh wait

Helka Homba

@orlp shiny

Mars Ultor

f=a=>b=>b?f(b)(a%b):a;g=m=>n=>[m,n].map(_=>_/f(m)(n))

Cᴏɴᴏʀ O'Bʀɪᴇɴ

11:02 PM

that seems to work

I wonder if uncurrying f makes it shorter

Mars Ultor

@CᴏɴᴏʀO'Bʀɪᴇɴ No, (a,b) vs a=>b

3 bytes vs 2 bytes, and function call is 4 bytes vs 3 bytes

Wait, it's the same length

Cᴏɴᴏʀ O'Bʀɪᴇɴ

yah

I just worked it out myself XD

f=a=>b=>b?f(b)(a%b):a;g=m=>n=>[m,n].map(_=>_/f(m)(n))
f=(a,b)=>b?f(b)(a%b):a;g=m=>n=>[m,n].map(_=>_/f(m,n))

quartata

I don't think you need the g=.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

oh, you don't

Alex A.

@mınxomaτ :P Why so?

Stupid internet

quartata

11:14 PM

@NewMainPosts holy shit cinnamon gum can totally win this challenge

quick to the computer

mınxomaτ

@AlexA. It's like they have a fixed quota of how many bugs they have to put into their hardware and drivers. Their stuff is really inconceivably terrible.

Alex A.

What do they make?

mınxomaτ

OEM components like WiFi/BT modules, integrated audio cards etc.

Ashwin Gupta

0

Q: Can I use jQuery/JS to rotate a canvas image?

Simple question, I'm drawing an image on the canvas using ctx.drawImage(img, 500, 500); I want to rotate this image around its central axis an undetermined degrees measure (somewhere from 0-360). I know that there is a jQuery library called jQuery rotate. However, I looked at the API of this, and...

javascript jquery canvas rotation jquery-rotate

mınxomaτ

@AlexA. For you: Everything that would be produced by Broadcom in a Mac is Realtek in PCs.

Alex A.

11:18 PM

Ah, okay

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@AshwinGupta USE JS FOR THE LOVE OF GOD

Alex A.

strawpoll.me/10122957

Ashwin Gupta

@CᴏɴᴏʀO'Bʀɪᴇɴ um excuse me? I am I thought.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

NO JQUERY

Doorknob

@AlexA. I never use underscores

quartata

11:19 PM

ugg why does zopfli take so long

Ashwin Gupta

Well 1) JQUERRY is written in JS. 2)Why not, a friend recomended it to me?

Alex A.

@Doorknob I used to but I switched a long time ago and I forget why

quartata

less compressing more winning

trichoplax

@AlexA. I use asterisks for both, unless I'm writing something that contains visible asterisks, then I use underscores for both to reduce insanity while editing

Ashwin Gupta

@CᴏɴᴏʀO'Bʀɪᴇɴ so how do i use js to do this?

mınxomaτ

11:20 PM

@AlexA. 𝐓𝐡𝐫𝐨𝐮𝐠𝐡 𝐭𝐡𝐞 𝐦𝐢𝐠𝐡𝐭𝐲 𝑝𝑜𝑤𝑒𝑟 𝑜𝑓 𝑢𝑛𝑖𝑐𝑜𝑑𝑒.

2

Cᴏɴᴏʀ O'Bʀɪᴇɴ

lemme think

Alex A.

Reducing insanity is itself an exercise in insanity

@mınxomaτ ._.

Ashwin Gupta

k

@AlexA. doesn't only #1 work?

hi

trichoplax

hi

Ashwin Gupta

oh shit.

never knew that.

_whats the escape char?_

k got it.

trichoplax

11:21 PM

You can't mix them in a single instance, so you can't use __hi** but you can switch back and for so **hi** __hi__ works

hi** *hi* __hi

Ashwin Gupta

hi

trichoplax

hi

Putting the strikethrough inside or outside the bold still works

Doorknob

Sandbox

Where you can play with chat features (except flagging) and ch...

2

Ashwin Gupta

erm, U didn't see that =/

trichoplax

@Doorknob Oops. Thanks... :)

Ashwin Gupta

11:23 PM

Hi

quartata

Dammit, it compressed to 14 bytes. Not short enough.

Alex A.

@AshwinGupta Nope

Ashwin Gupta

yeah just figured that out xD

woop. That was not what I meant to do.

El'endia Starman

@NathanMerrill I think it's a very common practice to have variable names like foo1 and foo2, which would have to be differentiated in another way if names can't have numbers.

trichoplax

fooone and footwo

Ashwin Gupta

11:27 PM

@trichoplax fooo and foot

trichoplax

lol that's even worse

Ashwin Gupta

:D

quartata

ugggghhh 15 bytes

Ashwin Gupta

how about roman numerals.

quartata

This is exactly the kind of challenge that Cinnamon Gum is for

Ashwin Gupta

11:28 PM

f_I and f_II

quartata

but somehow zopfli made it longer and bb96 only compressed the regex by 3 bytes

Downgoat

@AshwinGupta ಠ_______________ಠ my answer will be use jquer

Ashwin Gupta

@Downgoat yeah how....

Downgoat

does the canvas rotate function not cut it?

just change the css rotate property

Ashwin Gupta

it will rotate the whole canvas though?

I have other stuff that can't be rotated.

Like meh aliens and background and stuff.

Downgoat

11:30 PM

so you want to rotate just an image?

Ashwin Gupta

yup

trichoplax

Yeah that's less useful than alert('please tilt your head')

Ashwin Gupta

missiles, when the aliens fire at angle theta, the missile should be rotated to theta.

Downgoat

@AshwinGupta use canvas save and restore then

Ashwin Gupta

Not a problem for user missiles, they are just fired at 90 every time.

Code?

Idk if I get what you mean.

Downgoat

11:31 PM

@AshwinGupta for missiles I'd say to dynamically draw them rather than use bitmaps

quartata

I wonder how LZString would do on this.

Downgoat

first google result:

28

Q: HTML5 Canvas Rotate Image

jQuery('#carregar').click(function(){ var canvas = document.getElementById('canvas'); var image = document.getElementById('image'); var element = canvas.getContext("2d"); element.clearRect(0, 0, canvas.width, canvas.height); element.drawImage(image, 0, 0, 300, 300); }); jsfiddle.net/braziel/...

html image canvas rotation

Ashwin Gupta

@trichoplax currently gonna go w/ that if I can't get an answer.

trichoplax

lol

Downgoat

@quartata LZString uses unicode chars with very high code points too

Ashwin Gupta

11:32 PM

@Downgoat oh you mean like w/ the code not an image.

quartata

It compresses to 13 bytes which is a byte shorter.

I should probably add LZString as a compression option.

Downgoat

@AshwinGupta yeah

Ashwin Gupta

context.rotate(degrees*Math.PI/180);
but that rotates the WHOLE canvas^

Downgoat

it'll be much easier and faster

quartata

Not good enough to even beat Pyth though.

urggghhh

Downgoat

11:33 PM

@AshwinGupta ... read the rest ...

Ashwin Gupta

@Downgoat yeah but it will look less cool. Btw, how does that help me if they are dynamic, can I rotate dynamic drawings easier?

quartata

The first time we get a new kolmogorov complexity challenge that's right up cinnamon gum's alley and the regex is too short to compress well

Downgoat

@AshwinGupta yeah

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@AshwinGupta working on your thing

Ashwin Gupta

@CᴏɴᴏʀO'Bʀɪᴇɴ oh ok lol ty

@Downgoat mkay.

Downgoat

11:34 PM

the best option would be to make this completely out of absolutely positioned HTML elemnts, that would be faster and more flexible & easier imo

Helka Homba

Than drawing images and shapes on a specific graphics canvas? idk..

maybe for chess or something

New Main Posts

0

Q: Filter out the non-pi!

Your task is to write a program that will filter out those who do not belong to pi. You may use an estimate to the value of pi if it cannot be done. 355/113 would be a good estimate. Let's say we received the string "123456781234577812345678". We also have a pointer on pi: 314159265... ^ So...

code-golf

Cᴏɴᴏʀ O'Bʀɪᴇɴ

Do you know the canvas#rotate method @AshwinGupta?

developer.mozilla.org/en-US/docs/Web/API/…

quartata

@Dennis Can you pull Cinnamon Gum?

Finally did the escaping correctly lmao

Ashwin Gupta

yup, thats what downgoat showed me. Problem is, I don't know if that will work yet, I'm checking it out.

quartata

11:38 PM

if there was ever a situation where that backslash xkcd was relevant now would certainly be it

Ashwin Gupta

@Downgoat what do you mean by that? You mean the missiles and aliens and stuff?

Dennis

@quartata Pulled.

quartata

@Dennis Thanks.

Alex A.

Dennis is a master of pulling.

quartata

What the heck it still doesn't work

this is really starting to annoy me

Downgoat

11:41 PM

@AshwinGupta pretty much. HTML canvas is an absolute pain to work. With HTML you can take full advantage of CSS and its optimizations

Adnan

Is it just me or is SE really slow?

Alex A.

CSS = Crappy Shit Stick?

Downgoat

@Adnan just you

Adnan

dammit

Ashwin Gupta

@Downgoat I supposed I could. Am I able to pos HTML elements by just specifying x & y coords through JS?

Alex A.

11:41 PM

@Adnan I'm slow

Dennis

@AlexA. git pull my-finger

quartata

It should work.

Helka Homba

@quartata Use Static!

Alex A.

@Dennis ( ͡° ͜ʖ ͡°)

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@quartata he ninja'd you

Downgoat

11:42 PM

@AshwinGupta yeah

Helka Homba

@quartata I choose you!

quartata

Oh you know what it is

Actually, no

I'm still confused

Ashwin Gupta

@Downgoat hm, I'll look into it

It shouldn't change any of my logic, just graphics rendering.

Downgoat

@AshwinGupta make the elemnents position: absolute and put everything in a position: relative div.

Ashwin Gupta

and it would certainly make rotation easier =/

Downgoat

11:43 PM

then just modify top and left CSS

Ashwin Gupta

@Downgoat ok 1 tiny problem, IDK html. I just know enough so I can put the script tag into a blank website.

Alex A.

github.com/ferd/my-finger

Helka Homba

@AshwinGupta what are you trying to rotate?

Downgoat

@AshwinGupta lemme write up an example document

Ashwin Gupta

I suppose its time to learn.

@Downgoat sure ty.

@HelkaHomba missiles. Fired at angle theta, it needs to be rotated that much. Issue is, they are images drawn on canvas.

quartata

11:43 PM

Oh, TIL about re.escape()

Downgoat

 <div id="ref">
    <canvas id="render"></canvas>
</div>

quartata

@Dennis Can you pull again?

Downgoat

then do something like this to add elements:

Alex A.

@quartata That's when you've broken out once but were recaptured and have to do it again

Dennis

@quartata In a minute.

quartata

11:44 PM

@Dennis All right

Ashwin Gupta

@Downgoat if the canvas is the only thing in the div, shouldn't I just directly reference render...?

Downgoat

var elem = document.createElement('div');
elem.style.position = "absolute";
// more element configuration
document.getElementById('ref').appendChild(elem);

@AshwinGupta no, because JS doesn't have good insertAfter and insertBefore support

Ashwin Gupta

Ok ty :D

@Downgoat oh okay.

Helka Homba

@AshwinGupta does context.rotate not help?

Downgoat

@AshwinGupta np, gl on your game.

Ashwin Gupta

11:45 PM

ty

@HelkaHomba maybe* see previous discussion. I'll look at it.

ok bye gtg finish hw, will be back soon.

Downgoat

$ cpm install math
Attempting to install math...
Attempting to install from github.com/cheddar-lang/cheddar-libs/trunk/math/config.ini...

Retrieved package:
math, "Math Library for Cheddar"

\o/ \o/ \o/ Cheddar package manager works

Cᴏɴᴏʀ O'Bʀɪᴇɴ

YAY!

does my o library work? :3

it prolly wont

nvm don't try it

Dennis

@quartata status-pulled

El'endia Starman

@CᴏɴᴏʀO'Bʀɪᴇɴ That was a minor rollercoaster of emotions. :P

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@El'endiaStarman ^^"