The Nineteenth Byte

Eᴀsᴛᴇʀʟʏ Iʀᴋ

3:00 PM

link?

Kenny Lau

@Agawa001 What are you talking about?

Eᴀsᴛᴇʀʟʏ Iʀᴋ

and probably through github, it hosts for free if you have a repo there

Agawa001

@KennyLau ant track

Kenny Lau

ah

No, I don't host it

trichoplax

@HelkaHomba will it just be about reflection symmetry or rotational symmetry too?

Kenny Lau

3:01 PM

@Agawa001 sorry I have to go now

Helka Homba

@trichoplax You'll see in one min. Still need title...

trichoplax

Triflection? That's all I can come up with...

Mirror measure?

Eᴀsᴛᴇʀʟʏ Iʀᴋ

link to ant track?

Helka Homba

"Symmetrilluminati" sound cool but is not really related

Eᴀsᴛᴇʀʟʏ Iʀᴋ

use it anyway

trichoplax

3:02 PM

Being related is overrated

Eᴀsᴛᴇʀʟʏ Iʀᴋ

^

Agawa001

@EᴀsᴛᴇʀʟʏIʀᴋ morphett.info/turing/…

aditsu

@Geobits they're also talking about getting rid of the money barrier (and lots of other things) in this long podcast: youtube.com/watch?v=u6snP_ZoaZo

Agawa001

see how he used binary processing for and track, isnt it genuine ?

zyabin101

@everyone I'm searching an xkcd comic that features color. It features password hashes. It is titled "the world's hardest crossword puzzle". Can someone link me to it?

trichoplax

3:04 PM

If there aren't any previous challenges for other shapes, maybe just focus on symmetry rather than using triangles in the title

@zyabin101 If you're searching for an xkcd, you've come to the right place

Geobits

@aditsu I'm not a fan of Rogan in general, but I'll check it out when I have more time ;)

trichoplax

Try searching:

google.co.uk/…

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@zyabin101 wrong name

It was bound to happen eventually. This data theft will enable almost limitless [xkcd.com/792]-style password reuse attacks in the coming weeks. There's only one group that comes out of this looking smart: Everyone who pirated Photoshop.

aditsu

@Geobits I mainly watched it because Cenk :)

zyabin101

@EᴀsᴛᴇʀʟʏIʀᴋ Thanks.

trichoplax

3:06 PM

@EᴀsᴛᴇʀʟʏIʀᴋ Wrong name still brings it up as the first result for me...

Eᴀsᴛᴇʀʟʏ Iʀᴋ

what search?

the world's hardest crossword puzzle xkcd doesn't have it as a link.

trichoplax

No, but the search I linked above does.

Geobits

@EᴀsᴛᴇʀʟʏIʀᴋ Your google isn't personalized enough. Mine does at result #8

Eᴀsᴛᴇʀʟʏ Iʀᴋ

D:

trichoplax

@EᴀsᴛᴇʀʟʏIʀᴋ I tried my search terms again but with .com instead of .co.uk and I get similar results to you. Seems only in the UK does Google assume we want mainly xkcd

Eᴀsᴛᴇʀʟʏ Iʀᴋ

3:09 PM

must personalize be unique like america and trump

@trichoplax huh

@Geobits are you uk?

Geobits

gooud heavens nou

zyabin101

I have made a regex golf level. I'm sorta a llamah.

I didn't solve it right now. Wait, getting it right...

trichoplax

@Geobits I don't know if it was your intent, but I read that in a frightfully English accent

Geobits

Mission Accomplished

trichoplax

@EᴀsᴛᴇʀʟʏIʀᴋ Actually I'm wrong. The top result is still xkcd, just a logic puzzle instead of a crossword puzzle. Google clearly regards the UK as a nation of crossworders rather than logicians

Eᴀsᴛᴇʀʟʏ Iʀᴋ

3:11 PM

okai

Sp3000

@zyabin101 Isn't that basically the Prime level?

Helka Homba

Ok, good enough

zyabin101

@Sp3000 Ah right.

I should try fibonacci next... Or is it an included level, too?

Eᴀsᴛᴇʀʟʏ Iʀᴋ

boxcar2d.com

Sp3000

Actually nvm, the last few strings aren't prime :P

trichoplax

3:13 PM

@HelkaHomba I see you found a suitably awful title :P

Helka Homba

yup

Geobits

I'm really glad the stars didn't convince you to use 'mirror mirror'. I felt bad even saying it, but couldn't resist.

Helka Homba

Didn't even see those

trichoplax

I'm impressed. I'd be swayed by stars

Eᴀsᴛᴇʀʟʏ Iʀᴋ

^

reads question title

Geobits

3:17 PM

I might, but the cost is pretty high: gatherer.wizards.com/Pages/Card/…

Eᴀsᴛᴇʀʟʏ Iʀᴋ

says wtf out loud and gets scolded

aditsu

that's almost as bad as "Helka Homba"

Helka Homba

Says a ditty sue

zyabin101

I have made a regex golf level. I'm sorta a llamah.

Morgan Thrapp

@Geobits Why is that not 7 mana? C'mon WotC.

Eᴀsᴛᴇʀʟʏ Iʀᴋ

3:21 PM

#magicgeeks

Fatalize

I just found a 1974 book about APL at work

2

Sp3000

@zyabin101 I feel like the best way is just to cheat :/

New Main Posts

6

Q: Symme-Try This Triangle Trial

A string whose length is a positive triangular number (1, 3, 6, 10, 15...) can be arranged into an "equilateral text triangle" by adding some spaces and newlines (and keeping it in the same reading order). For example, the length 10 string ABCDEFGHIJ becomes: A B C D E F G H I J Write a...

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@Fatalize noice

A Nerd - I

Wow, no one said hi to me. I'm almost offended

Sp3000

3:24 PM

@NewMainPosts @HelkaHomba Why 0 for the last case? I'd have expected 1

Helka Homba

@Sp3000 Because there are 0 types of symmetry for those (granted, the numbering is kinda contrived)

@ANerd-I (hi + bye) / 2

Sp3000

in a soft voice: "but the identity..."

Eᴀsᴛᴇʀʟʏ Iʀᴋ

> almost

eh

HAI

Helka Homba

@Sp3000 1 kinda would make sense for the 6 cases though, but I felt multiplying the 2 and 3 was more natural somehow

Sp3000

6 makes sense for those, since it's the number of symmetries that apply to that shape

trichoplax

3:30 PM

I'm thinking of posting my next challenge without sandboxing it first, but I'm worried about this kind of problem afterwards.

Helka Homba

@Sp3000 But by that token I'd say 0 symmetries apply to the unsymmetrical shapes

trichoplax

@zyabin101 Fibonacci regex?

Sp3000

@HelkaHomba But doing nothing is a symmetry :P (identity element)

Helka Homba

@trichoplax To be fair, Sp of all people is not usually this fussy

zyabin101

@trichoplax Yup. Fibonacci regex.

Helka Homba

3:33 PM

@Sp3000 Hmm, well

New Main Posts

2

Q: QWERTY Quine Creation

Challenge Create a program that outputs it's source code QWERTY sorted. What is QWERTY sorting? QWERTY sorting is sorting code by the QWERTY keyboard. Anything higher or more left is greater. qwertyuiop\ asdfghjkl;' zxcvbnm,./ QWERTYUIOP{}| ASDFGHJKL:" ZCVBNM<>? -=!@#$%^&*()_+~` (there is...

code-golf string restricted-source quine

Helka Homba

Anyone else agree with Sp?

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@HelkaHomba AIIIIIII

no moar tri

kthxbai

Sp3000

(btw I don't mind if you kept it, it's probably a little less golfier though cos I think you might need to special case :P)

zyabin101

@EᴀsᴛᴇʀʟʏIʀᴋ BAI

trichoplax

3:34 PM

@HelkaHomba I don't know what the mathematical way is, but I'm thinking of there being 1 way of placing that triangle, whereas there are 2 ways of placing a triangle that can be reflected in one line, and 3 ways of placing a triangle that can be rotated 120 degrees. That then gives 6 ways if both apply

TimmyD

@HelkaHomba The 1 does seem to make more sense when looking at 2/3/6 for the other possibilities. You're not counting the number of symmetries, you're counting, like trichoplax said, the number of placements that result in the same triangle.

Helka Homba

@trichoplax Ok. Point conceded. I've changed it from 0 to 1 @Sp3

Sp3000

Sorry :( (I blame group theory)

trichoplax

@HelkaHomba I'm sorry too. I didn't expect my ramblings to be taken as additional evidence :)

Helka Homba

No, it's fine. It does make more sense. I just hope it didn't mess anyone up.

Sp3000

3:39 PM

I guess you could say this was a result of... ( •_•)>⌐□-□ / (⌐□_□) group action

2

quartata

ba dum tsssss

zyabin101

@Sp3000 His glasses are black.

trichoplax

I was initially going to complain that a triangle can also have 3 reflection symmetries, but luckily I thought it through and realised that that automatically means rotational symmetry too, and that 1 reflection symmetry and rotational symmetry implies 3 reflection symmetries too. So I stopped myself before embarrassing myself...

Helka Homba

@zyabin101 They look white to me

Sp3000

@zyabin101 I don't wear sunglasses usually :P

zyabin101

3:41 PM

@HelkaHomba ^

TimmyD

So you're saying this is a result of ...
( •_•)
( •_•)>⌐■-■
(⌐■_■)
group action?
♫YEEEEEAAAAAHHHHHHHH!♫

Go go gadget formatting

2

Helka Homba

@quartata get consistent >:|

4

quartata

no

cat

@EᴀsᴛᴇʀʟʏIʀᴋ ewww, apple :P

Eᴀsᴛᴇʀʟʏ Iʀᴋ

D:

trichoplax

3:43 PM

Apr 18 at 21:45, by quartata

ba dum tish or something

Eᴀsᴛᴇʀʟʏ Iʀᴋ

> tish

trichoplax

or something

Eᴀsᴛᴇʀʟʏ Iʀᴋ

SACRELIGE wait why do i care wait i dont okai bai

cat

@EᴀsᴛᴇʀʟʏIʀᴋ tush

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@CᴏɴᴏʀO'Bʀɪᴇɴ PRIME TEST IN FOG

trichoplax

3:45 PM

:29291514 I liked that while it lasted...

Eᴀsᴛᴇʀʟʏ Iʀᴋ

0

A: Is this number a prime?

Fuzzy Octo Guacamole, 21 bytes ^-!.1C[d2ss.p*.+]s.Zm Outputs 0 for false, 1 for true. Thanks to @xnor for the algorithm.

Sp3000

Yeah, sorry. Treating the identity as a 0° rotation isn't quite right though

mınxomaτ

Two Drums and a Cymbal Fall off a Cliff

►

zyabin101

@EᴀsᴛᴇʀʟʏIʀᴋ Congrats!

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@EᴀsᴛᴇʀʟʏIʀᴋ NICE!

Sp3000

3:47 PM

It's really just a separate thing - you have 3 reflections, 2 rotations (+- 120°) and the do-nothing identity. Combining any two of them gives you a third element in that list.

zyabin101

@EᴀsᴛᴇʀʟʏIʀᴋ As your language has integers, input and output, can add integers and has a prime checker, Fuzzy Octo Guacamole is definitely a proven programming language. Congrats!

Sp3000

For a 1 output you can only apply the identity, for a 2 output it's identity + one of the reflections, for a 3 output it's identity + both rotations and for a 6 output it's all of them

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@zyabin101 :D

trichoplax

@mınxomaτ That's magical :)

mınxomaτ

And it only took them 3 tries.

zyabin101

3:48 PM

If 100 people lived on the earth

trichoplax

@Sp3000 Neat

Helka Homba

@Sp3000 You're not telling me I'm missing a case are you? ._.

Sp3000

Er... no, what makes you think that?

Helka Homba

Just not comprehending as much as I ought :P

Sp3000

But anyway, the nice thing is that, say for the 3 case, {identity, 120° rotation, -120° rotation} also has the property that applying any two also gives you an element in the list

cat

3:51 PM

@zyabin101 whoa.

Sp3000

Ditto for {identity, reflection}

cat

@QPaysTaxes not necessarily

trichoplax

And 2 reflections gives you a rotation or identity

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@cat @zyabin101 explanation added.

@zyabin101 so. much. EMPTY DONUT STORE

Has anybody not voted on this question? I want it to have exactly 100 votes.

(the prime-check one)

quartata

Hey @CᴏɴᴏʀO'Bʀɪᴇɴ, you can JS right. How might I approach trying to make a seamless infinite scroll?

Cᴏɴᴏʀ O'Bʀɪᴇɴ

3:56 PM

@quartata is that some crazy data type?

quartata

Uh, no?

Eᴀsᴛᴇʀʟʏ Iʀᴋ

A wise man once said "use brython".

@CᴏɴᴏʀO'Bʀɪᴇɴ no

Cᴏɴᴏʀ O'Bʀɪᴇɴ

or a display thing

quartata

Display thing

Eᴀsᴛᴇʀʟʏ Iʀᴋ

he means scroll the page down

Cᴏɴᴏʀ O'Bʀɪᴇɴ

3:57 PM

oh

quartata

Here's what I mean

Eᴀsᴛᴇʀʟʏ Iʀᴋ

think PG-DWN key

Cᴏɴᴏʀ O'Bʀɪᴇɴ

As in, "infinite scrolling webpages"

Eᴀsᴛᴇʀʟʏ Iʀᴋ

ya

quartata

Suppose I have an image

Eᴀsᴛᴇʀʟʏ Iʀᴋ

3:57 PM

Try a marquee.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

ew

Eᴀsᴛᴇʀʟʏ Iʀᴋ

Really.

trichoplax

A tiled image so there's no new information?

Sp3000

@trichoplax Yeah :) Rotation if the two reflections are different, identity if they're the same

Eᴀsᴛᴇʀʟʏ Iʀᴋ

Tilt it vertical and put images in it

quartata

3:58 PM

Yes. I want to infinitely tile the image essentially.

Eᴀsᴛᴇʀʟʏ Iʀᴋ

it looks like it is scrolling down.

quartata

So when the user scrolls down it appends the image.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@quartata use css

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@quartata as a background?

quartata

@CᴏɴᴏʀO'Bʀɪᴇɴ Can it do that??

Eᴀsᴛᴇʀʟʏ Iʀᴋ

3:58 PM

or ^^

Cᴏɴᴏʀ O'Bʀɪᴇɴ

background-repeat: infinite

yup.

or something like that

quartata

@CᴏɴᴏʀO'Bʀɪᴇɴ jeez these CSS3 toys

zyabin101

waffles

Eᴀsᴛᴇʀʟʏ Iʀᴋ

use background-repeat: infinite

shit lag ninja'ed me hard

@zyabin101 ALL SHALL KNOW THAT THE GLORY OF PANCAKES AND CREPES AND FRENCH TOAST ALL SURPASS PUNY WAFFLES

3

quartata

I like pancakes and waffles

And French toast

Helka Homba

3:59 PM

and crepes

Sp3000

@EᴀsᴛᴇʀʟʏIʀᴋ Crepes please

:/ ninja'd

Eᴀsᴛᴇʀʟʏ Iʀᴋ

okai

fixed

Helka Homba

and Dutch Babies

zyabin101

ALL SHALL KNOW THAT THE GLORY OF PANCAKES AND CREPES AND FRENCH TOAST AND DUTCH BABIES ALL SURPASS PUNY WAFFLES

@HelkaHomba ^

Also, what's a Dutch Baby?

quartata

Dutch Baby Pancake. It's a kind of popover

@CᴏɴᴏʀO'Bʀɪᴇɴ Looks like I want background-repeat: repeat-y

Hmm I don't think that works though

Eᴀsᴛᴇʀʟʏ Iʀᴋ

4:03 PM

oh

you need the infinite scroll part too

not just hit bottom

quartata

Yeah

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@quartata github.com/infinite-scroll/infinite-scroll

hongkiat.com/blog/infinite-page-scroll

aditsu

@zyabin101 the urban dictionary does not disappoint (very not-safe after scrolling a bit)

quartata

@EᴀsᴛᴇʀʟʏIʀᴋ fuck not jquery

Eᴀsᴛᴇʀʟʏ Iʀᴋ

roflmao

This is jQuery, but is it the right effect?

$(document).ready(function() {
	$(window).endlessScroll({
		inflowPixels: 300,
		callback: function() {
			var $img = $('#images li:nth-last-child(5)').clone();
			$('#images').append($img);
		}
	});
});

<ul id="images">
	<li>
		<a href="https://www.pexels.com/photo/mist-misty-fog-foggy-7919/">
			<img src="https://pexels.imgix.net/photos/7919/pexels-photo.jpg?fit=crop&w=640&h=480" alt="" />
		</a>
	</li>

	…
</ul>

@quartata pls tri jsfiddle.net/gzofppoz

cat

4:09 PM

I thought it might be fun to try to implement 2D matrix convolution almost from scratch in a language that doesn't have great matrix libraries

My brain is really sore, and I haven't even read the source, just the documentation

quartata

Yeah that's close but I don't like the delay in loading the images. Could I fire an event when the user is close to the bottom instead of at the bottom?

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@quartata can you use jQuery???/

quartata

I guess...

I feel like a library is overkill here. Surely I can figure out where the scroll position is at in JS

Eᴀsᴛᴇʀʟʏ Iʀᴋ

did you try the fiddle?

it moves fairly fast

That is a piet quine.

Helka Homba

@quartata Using jQuery will make your JS life easier, no matter what you're doing

cat

4:12 PM

@Fatalize I bought this a few weeks ago: amazon.com/gp/product/0442242514/… :D

Eᴀsᴛᴇʀʟʏ Iʀᴋ

^^

cat

@EᴀsᴛᴇʀʟʏIʀᴋ wh

Eᴀsᴛᴇʀʟʏ Iʀᴋ

... at the fuck

yah

zyabin101

dam

~_~

Fatalize

@cat $235?

Eᴀsᴛᴇʀʟʏ Iʀᴋ

4:15 PM

I assume ^.

cat

@Fatalize I got it for $0.01 actually :P

Fatalize

lolwut

still more expensive than mine, got it for 0€

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@cat how?

Fatalize

#worthit

cat

Seems the price has since increased, I dunno

Yours is also in a language I don't speak :P

Fatalize

4:17 PM

I don't speak APL either

(honhon)

zyabin101

FRUITW'd /o\

quartata

@EᴀsᴛᴇʀʟʏIʀᴋ I want it to be seamless. Any wait at all ruins the illusion I'm trying to go for.

Eᴀsᴛᴇʀʟʏ Iʀᴋ

okai

working onit

quartata

That's why I was wondering if I could do the loading before the scrollbar hits the bottom

Looks like there is element.scrollTop for scroll position

Eᴀsᴛᴇʀʟʏ Iʀᴋ

57 secs ago, by Eᴀsᴛᴇʀʟʏ Iʀᴋ

working onit

quartata

4:21 PM

No, don't bother. I think I know what to do

cat

@Fatalize hue hue

quartata

I was just wondering if there was an easy off the top of your head solution before I went stack overflowing

cat

I wanna learn J and K at some point, though, so APL is a starting point

Fatalize

hue hue is a colourful way to laugh

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@quartata nope

@quartata I assume no PHP? :P

quartata

4:23 PM

@EᴀsᴛᴇʀʟʏIʀᴋ ?

Eᴀsᴛᴇʀʟʏ Iʀᴋ

you don't want PHP code.

yah

Agawa001

@Fatalize what about to hoe hoe

quartata

@QPaysTaxes I like PHP.

Eᴀsᴛᴇʀʟʏ Iʀᴋ

okai

idc

quartata

I like the part where hitting run on JSFiddle does nothing

@QPaysTaxes Umm.. yeah I do?

aditsu

4:28 PM

burn him!

Eᴀsᴛᴇʀʟʏ Iʀᴋ

okai

quartata

@QPaysTaxes Oh, it's because I forgot JS doesn't run in a separate thread

Eᴀsᴛᴇʀʟʏ Iʀᴋ

i needs torch and his address

quartata

I need to use a web worker

aditsu

@EᴀsᴛᴇʀʟʏIʀᴋ 🔦 and 19th byte, chat.SE

zyabin101

4:30 PM

@aditsu burn whom?

aditsu

whom* :p

5 mins ago, by quartata

@QPaysTaxes I like PHP.

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@aditsu okai

but too weak torch

brb finding what I need

aditsu

Due to a typo, I initially found a forum for serious Fleshlight enthusiasts, and it turns out their highest-end models are ALSO capable of setting trees on fire. They're impossible to use without severe burns, but some of them swear it's worth it.

zyabin101

burns @quartata

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@aditsu i needs wickedlasers.com

zyabin101

4:32 PM

I really should have a command for thAT>

@EᴀsᴛᴇʀʟʏIʀᴋ It asks a ship to country.

aditsu

Eᴀsᴛᴇʀʟʏ Iʀᴋ

10/10 must get

@quartata can I borrow you credit card for a mo? YOu won't use it much more, so?

quartata

Uh, no. Sorry.

Eᴀsᴛᴇʀʟʏ Iʀᴋ

aw

Anybody willing to steal his for me?

aw

@aditsu ?

wait

BAI

aditsu

¯\_(ツ)_/¯

for the record, I have a flashlight that I bought after some discussion in a forum for flashlight enthusiasts, long before that xkcd

it doesn't burn trees though

only about 800lm

cat

4:39 PM

@QPaysTaxes None, but Factor and its GUI IDE is written entirely in Factor, so it's at least possible. Check out the other GUI examples on rosettacode.org/wiki/Category:Factor.

zyabin101

@aditsu Russian hotels require 150lm by law. Your flashlight is a lot brighter.

Helka Homba

@Mart Explanation incoming?

cat

@zyabin101 They what?

Helka Homba

@cat Hotels require flashlights on hand I guess? Doesn't seem that odd

cat

This was flagged as VLQ, but it isn't VLQ, it's just wrong. Can people stop using flags in the wrong way? Flags shouldn't be used to indicate wrong answers, just answers that are actually harmful.

zyabin101

4:42 PM

@cat Yup. The Russian hotel norms include a lighting norm for rooms, of 150lm.

cat

@zyabin101 that's interesting.

Helka Homba

@zyabin101 In US hotel rooms there are never flashlights, just bibles

cat

groans true

Helka Homba

A different kind of light

Cᴏɴᴏʀ O'Bʀɪᴇɴ