The Nineteenth Byte

Martin Büttner

12:00 AM

@Sp3000 sweet! :)

Alex A.

Those who know Pyth: Shorter way than AQ++++G" is "?<GH"less than"?>GH"greater than""equal to"" "H?

Nvm, Kirby posted a shorter one

Martin Büttner

@AlexA. Oh, I skimmed the question for one of the words but must have overlooked it.

Alex A.

No problem

aditsu

12:49 AM

so, what's a good movie to watch in the cinema these days?

Alex A.

@aditsu I don't know what's playing in HK but I liked Shaun the Sheep.

aditsu

I think it's not available anymore

Alex A.

Bummer. What's playing there now?

PhiNotPi

Somebody came by my dorm room and asked "Can I borrow a belt? We're building a car."

Alex A.

@PhiNotPi I have a feeling you won't see that belt again should you give it to them.

Also, and perhaps more importantly, what the hell.

PhiNotPi

1:00 AM

A couple minutes later, a group of people rode by on a pile of furniture strapped together.

New Main Posts

0

Q: Base -2 representation using cpp - exercise

I'm preparing for a test and came across this exercise, I will be puting my solution at the end and hope for you guys if possible to provide better solution with explanation in whatever language you are confortable with. In base -2, Integers are represented by sequences of bits in the folow...

PhiNotPi

^ beautiful

Alex A.

It makes me so happy. You're quite the artist, @Phi.

aditsu

@AlexA. various movies at various cinemas... e.g. these and these and these and more

Alex A.

I haven't heard of most of those and I've seen none of them.

I think my parents saw The Man from U.N.C.L.E. and I think they liked it. I don't remember.

aditsu

1:13 AM

I checked a few that sounded promising, they all have <10% on rotten tomatoes :p

Alex A.

WOW! <10%!

PhiNotPi

Lower scores are better, right? Like in golfing?

aditsu

haha

hm, the best one might be MI5, but it's starring that scientologist nutjob

Alex A.

Yeah...

Are the films in Mandarin, English, or other?

aditsu

they don't usually dub them, but use subtitles

Alex A.

1:19 AM

But the dialog is in the original English when appropriate? (I.e. American movies are still in English but with subtitles?)

aditsu

yeah

only movies from China or Taiwan would be in Mandarin

HK movies in Cantonese

Alex A.

Ohh, okay. Is Cantonese the most common language there?

And do you speak it?

aditsu

it is, and I only know a few words

Alex A.

Is English really common? Are you able to communicate well with the general populace?

aditsu

ah, they dub a few movies, mostly the ones for children I think

it's fairly common, but many people don't speak it well

it depends on their education

ooh, Inside Out seems to be a good movie

Alex A.

1:27 AM

Is that Pixar?

aditsu

yeah

98% fresh tomatoes

Alex A.

Nice!

I like all of the Pixar movies I've seen.

Oh, that's not true. I didn't like Cars.

orlp

what does you guys's editor look like when golfing?

Alex A.

Is that vim? Looks weird.

orlp

@AlexA. yes, that's vim

what's weird about it

Alex A.

1:38 AM

How it looks. Idk. I know next to nothing about vim.

aditsu

mine often looks something like this

Doorknob

@orlp That looks kinda like a modified version of Solarized. What colorscheme is it?

orlp

@Doorknob solarized :)

@Doorknob there's just no syntax highlighting for the document or the Pyth code

Doorknob

Ah, that's what threw me off.

orlp

there, some python code

to be honest, solarized isn't really my favourite color scheme

but setting up color schemes for terminals is a pain

I would prefer something a bit less... rainbowy colorful

@Doorknob I do also have parenthesis color matching:

@trichoplax I advocate a rep-cap per answer, not per day

Doorknob

1:43 AM

Usually my setup looks something like this:

orlp

this especially bothers me when karma whoring on stackoverflow

@Doorknob you don't use tmux?

Doorknob

Sometimes I'll have an extra terminal window either to view debug output or if I want a separate window to run the program, in which case I either make the REPL a floating window, have an extra column, or put it below Firefox, whichever I feel like doing at the time.

@orlp No, I prefer having separate terminals that tile with i3.

orlp

@Doorknob ah

I really like ctrl-b-b to switch between my editor and my shell

Doorknob

@orlp Nice. I never did bother to set that up.

orlp

@Doorknob and in ctrl-b 1 window I always have 'pcalc' set up

Doorknob

1:46 AM

What's that?

orlp

customized python shell that has all kinds of default imports / math stuff

plus two functions, copy(x), that copies x to clipboard and paste() that gives back the clipboard as a string

Doorknob

Ah, okay. I don't golf with Python much.

orlp

not for golfing

see it as a super deluxe calculator

Doorknob

Oh, I see. That does sound convenient. I usually just fire up irb in a separate terminal when I need something like that.

Copying large amounts of text is a pain. I usually just do something like File.open('asdf.txt', 'w'){|f| f.puts str }. The copy function sounds super convenient.

orlp

@Doorknob yep

I use it every day

Alex A.

1:49 AM

You guys are so efficient. I use a computer like a caveman.

orlp

paste in some data - do some processing - copy it

@Doorknob for example if you have a list of numbers you want to double

a layman would take 20 minutes manually doing it

you'd probably write a script in 1-2 minutes to do it

Doorknob

I'm more comfortable with Ruby, so now I'm thinking of making a similar thing for Ruby.

orlp

I'd be done in 10 seconds :)

Doorknob

:)

feersum

@AlexA. Same here...when I need to copy it's 'system(echo %s | clip)'

except there are a bunch of characters that will make it not work

Doorknob

1:51 AM

It doesn't sound too hard, actually. Something like def copy str; File.open('/tmp/copy.txt', 'w') {|f| f.puts str }; `xclip /tmp/copy.txt`; end would probably do the trick.

feersum

so then I have to the horrible right click 5 times and copy the entire console thing

Alex A.

I Cmd+C, Cmd+V. I don't understand anything else.

Doorknob

@AlexA. What's Cmd? ;)

aditsu

I think it's that stupid flowery-symbol key on macs

TheNumberOne

yay, my internet is finally working (reliably) :)

Alex A.

1:55 AM

It's like Ctrl except you can copy/paste in programs where Ctrl does other things.

aditsu

it's a bit like the windoze key, except the shortcut assignments are all messed up

Alex A.

The Windows key is useless.

aditsu

I use it a lot

Doorknob

What's the Windows key? ;)

aditsu

the key with a windows symbol, found on most computers

usually between ctrl and alt

Doorknob

1:58 AM

Mine has one, but it does nothing :P

aditsu

mine does a lot of things, but mostly because I set it up

Doorknob

I should probably use mine for i3 so that other programs can use Alt, but I've gotten too used to using Alt for i3.

It's hard to reach anyway.

aditsu

in Linux it's often called "Meta", but not consistently

Doorknob

On Ubuntu it's called Super, but I think that's more of a Unity thing.

aditsu

yeah I've seen it called Super too

Sp3000

2:08 AM

@AlexA. Gonna make "The Many Memes of PPCG"? :P

TheNumberOne

@AlexA. Not as useless as Caps lock

Doorknob

@Sp3000 Oಠಠh, that's nಠt a bad idea.

@TheNumberOne I have Caps lock bound to Ctrl, because it's much easier to reach there.

I've been thinking about installing xcape so that it acts as Esc when tapped, and Ctrl when held with another key, but I never got around to doing that.

undergroundmonorail

@Doorknob alt for i3 is objectively better than windows because i say so

Doorknob

@undergroundmonorail "objectively better" "because I say so" I see... :P

3

undergroundmonorail

this is correct

i have to go to work but i want to do code golf and play pokemon, life is unfair

Alex A.

2:18 AM

@TheNumberOne I'd take Caps Lock over the Windows key because the Windows key means I'd be using Windows. :P

@Sp3000 Considering it but it'd definitely have to be CW. I can't do it on my own.

Doorknob

We should totally do that. We have tons of them, although most of them are from chat :P

Alex A.

Examples?

undergroundmonorail

If I ever finish this do you guys think it would be fun? I think it could be fun but I don't know if it would be too hard to come up with a good strategy or something

Doorknob

@AlexA. ಠ_ಠ

Alex A.

ಠ_ಠ

Ninja'd

Doorknob

2:22 AM

Also, you going on all of my vacations. :P And MOM and DAD. Also Yingluck / Revision 38. Just to name a few.

Also, stars in chat. Also, @Geobits is practically a meme himself. :P

Alex A.

Graduation

Doorknob

And overhanded!

2

Alex A.

What are Yingluck and Revision 38?

Sp3000

Also Foo and TinyMUSH from their respective CnRs

Alex A.

Gratuitous llamas

Doorknob

2:24 AM

Oct 12 '14 at 23:19, by Geobits

@Doorknob Before I edit it out, is there any reason you tagged the sandbox with [yingluck]? It seems a bit odd...

Oct 12 '14 at 23:59, by Martin Büttner

this will totally be some mystical piece of PPCG lore a couple of years from now... "Hey, guys, I was just idly browsing through the sandbox's edit history... and a mod once tagged it with yingluck. :O"

Oct 13 '14 at 0:03, by Martin Büttner

or maybe "Revision 38" will become a meme for adding useless tags or making weird unmotivated edits :D

:D incredible

what is tinyMUSH?

Mush that's small

This CnR, which nobody ever got for the sole reason that nobody could test it

Doorknob

Oh, would StackEgg ruining April 1 count as a meme also? :P

aditsu

2:31 AM

@Doorknob heh, I maintain xcape for Gentoo :) I use it for the windoze key

Alex A.

@Doorknob Meme? Maybe. More like a dark spot in our history.

Doorknob

What about Nethack? Or how about Jimmy being named by chat? :P

orlp

I think tinymush takes the cake for most obscure language

BrainSteel

Wow, we have a lot of inside jokes.

orlp

should've done that for the esolang copnrobbers

Doorknob

2:37 AM

@BrainSteel We do indeed, Brian Steele.

Oh how could I forget! World big dosa is kind of one too.

orlp

@Doorknob oh oh do me

surely there must be some dank meme

BrainSteel

This new pizza thing will surely reach memedom as well.

Sp3000

waits for post to be made :D

orlp

please a post

I need it

Doorknob

@AlexA.?

Fine, I'll go ahead and create it if @AlexA. has flown away. :P

orlp

2:49 AM

OH GOD NO

did you read the news?

a truck crashed filled with ramen noodles

damage estimates range up to $43!

NinjaBearMonkey

Ooh so close to trusted user tools I can taste it

Even though I'm not entirely sure what they do

undergroundmonorail

As I understand it, it's like you're a mod except you don't get pizza

Maltysen

and no binding votes

Alex A.

@Doorknob Eyo

Stepped out for a minute

I'll post if you haven't yet

NinjaBearMonkey

No pizza? Never mind, I don't want it then.

undergroundmonorail

2:53 AM

I'm on mobile so I don't feel like going to the trouble of checking but iirc I'm 5 rep away from 3k

Alex A.

@Doorknob?

BrainSteel

He dun posted it.

Doorknob

I'm waiting for @NewMetaPosts to come answer for me but it's being @OldMetaPosts instead and taking forever :(

Alex A.

Haha

What does Cultural Height mean?

BrainSteel

Time in our culture when the meme was most important, I believe.

Alex A.

2:56 AM

Oh, okay. Thanks.

BrainSteel

(e.g. Java is a persistent meme -- its significance doesn't really vary with time, whereas ಠ_ಠ is a more recent construction)

undergroundmonorail

@Doorknob yesterday (I think, working nights messed up my sense of time and dates) I posted a link to my sandboxed challenge immediately before the bot linked to the same thing

I forgot there even was a bot, and it was slow enough to let me do it myself first :p

New Meta Posts

4

Q: The Many Memes of PPCG

Catchphrases and concepts that spread from person to person are known as memes, which, courtesy the Internet, can now explode across the Earth like a highly contagious virus (hence "going viral"). As with their real-life counterparts, some infectious diseases are global (pandemic), while others a...

discussion

Sp3000

That logo.

Doorknob

Haha that actually threw me off for a second.

Maltysen

2:59 AM

why is the c so small?

BrainSteel

Because we didn't pay our artist.

Alex A.

Nooo we both posted overhanded

Doorknob

@AlexA. ninja'd for the third time in a row :P

Alex A.

Truly you are more ninja than I.

Nathan Merrill

I love how this site puts emphasis on shorter answers, while stackexchange argues for a minimum of 200 bits of entropy

Alex A.

3:06 AM

Hahahahah ಠngಠing

BrainSteel

200 bits actually seems quite low. <--- That sentence is more than 200 bits of entropy.

Sp3000

Someone who's been on long enough should do code trolling:P

Alex A.

@PeterTaylor should. :D

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

Arranging Matrices code-golf (doesn't actually require any matrix math) While doing homework on matrix multiplication, I realized that I could avoid rewriting all of the matrices by arranging them intelligently on the page. If the problems were: A * B = C A * D = E F * D = G I could arrang...

Alex A.

Hahaha the sandbox icon

TheNumberOne

3:18 AM

zero-length hyperlink failed :(

Doorknob

That reminds me, @AlexA. should post ghost pings as a meme, because I think he's the originator. :P

Alex A.

Am I?

Doorknob

I actually don't remember.

But I think it was you.

Alex A.

Your memory is probably better than mine so I believe you.

TheNumberOne

testing

Alex A.

3:19 AM

@TheNumberOne Helloo

Doorknob

@TheNumberOne hi

Alex A.

@Doorknob You didn't intend to tag it with yingluck??

PhiNotPi

The correct term is "stealth pinging."

Alex A.

It just happened?

Doorknob

@AlexA. Uhhhhhh... yeah.

TheNumberOne

3:20 AM

correct

Doorknob

Have to go to sleep now. Someone post MOM and DAD please :P

Goodnight!

goodnight :)

test

Hello

3:22 AM

Hello

jk

PhiNotPi

bye!

TheNumberOne

What is the easiest way to type a zero-width-space ?

PhiNotPi

I just copy it from here: en.wikipedia.org/wiki/Zero-width_space

Alex A.

^

TheNumberOne

That's what I've been doing. :(

@EveryoneAwake Good night :)

Alex A.

3:26 AM

Goodnight!

PhiNotPi

Should my stealh pinging meme post explain exactly how to do it?

Or would that cause it to get fixed?

Alex A.

Already posted

And I didn't give specifics

PhiNotPi

Oh, well my post is better.

Alex A.

Yeah

BrainSteel

Hey, wait a minute! Your post doesn't have a real stealth ping!

Dennis

3:38 AM

Meme: Eternal duplicate Cultural height: Now

:P

Alex A.

Haha

PhiNotPi

Where stealth pings originated: chat.stackexchange.com/transcript/240/2015/6/5/0-9

Alex A.

Jun 5 at 2:36, by trichoplax

In other news, a massive ping battle has broken out on PPCG

Haha

BrainSteel

I remember that day like it was yesterday.

Geobits

I remember it like it was just under three months ago.

Alex A.

4:00 AM

Has it been that long?

Alex A.

4:45 AM

Is there a shorter way to do sign(A-B) in APL than |d÷⍨d←-/x? (where x is the array A B)

Dennis

Monadic × is sign, so ×-/ should work.

Alex A.

I mean... thanks, @Dennis. :P

Dennis

My wife is starting to get jealous. :P

Alex A.

5:04 AM

;D

Dennis

This is one well obfuscated Hello World answer:

5

A: The Programming Language Quiz

???, 347 bytes What? The traveler was shocked. Never in his life had he heard such a sentence/phrase said so beautifully. Hello, World! It rung like a booming echo in a field of tranquility. So strong, yet...calm. In fact, the force was so strong, it knocked down a nearby sign that said "Store/H...

If anybody else had posted it, I wouldn't have figured it out in a million years.

New Main Posts

6:40 AM

0

Q: AIRPLANE SEATING PROBLEM

An airlines company has several planes of the same type.Each plane has a seating capacity of 24 X 3 rows and 8 seats in each row split has shown. Hide Copy Code 1 [a] [b] [c] [d] [e] [f] [g] [h] 2 [a] [b] [c] [d] [e] [f] [g] [h] 3 [a] [b] [c] [d] [e] [f] [g] [h] If 4 people book - allocate 4...

python c java

isaacg

The above question has so many things wrong with it, I didn't know which way to vote to close it.

Lembik

hi @isaacg

isaacg

Hi lembik!

Maltysen

@isaacg i did unclear because it has the potential to be a challenge if the OP was able to form coherrent thoughts.

isaacg

Sure. I did objective winning condition because it didn't have one.

Maltysen

6:47 AM

@xnor that link is giving me a server error.

isaacg

Extraneous period at the end.

Lembik

I have an idea for another hard matrix problem :)

Lembik

7:00 AM

please take a look at codegolf.stackexchange.com/questions/55726/…

and let me know if anything can be improved

New Main Posts

0

Q: Solving the a harder Hadamard problem

First, some definitions. A Hadamard matrix is a square matrix whose entries are either +1 or −1 and whose rows are mutually orthogonal. The Hadamard conjecture proposes that a Hadamard matrix of order 4k exists for every positive integer k. A circulant matrix is a special kind of matrix where ...

code-challenge math

Lembik

apart from the title! (fixed)

Mitch Schwartz

7:34 AM

@Lembik suggestion "For each integer n starting at 2" -> "For each even integer n starting at 2"

hmm i posted it two minutes ago and i can't edit or delete

i thought the window was bigger

ah well, the suggestion still stands, you can't have dot product zero with odd number of columns

Lembik

7:55 AM

oh I see

@MitchSchwartz thanks!

@MitchSchwartz Good to see back here too :)

Mitch Schwartz

@Lembik likewise :)

Lembik

@MitchSchwartz I hope my challenges remain hard enough for you :)

Mitch Schwartz

what is the problem harder than? you have "harder" in the title

Lembik

@MitchSchwartz harder than just determining if a given matrix has all rows mutually orthogonal.. maybe I should change it

it's not the most accurate title

but that was the idea

Mitch Schwartz

well for partially circulant matrices, checking orthogonality is easy, you only have to compare each with the first row

Lembik

8:06 AM

@MitchSchwartz why is that?

I believe you but how do you know that's true?

Mitch Schwartz

for rows i and j with j>i, the dot product is determined by j-i

because they are the same entries, just rotated

it may be easier to see by just looking at an example
a b c d
b c d a
c d a b
d a b c

notice that between rows 1 and 2 you have (a,b), (b,c), (c,d), (d,a)

and between rows 2 and 3 you have (b,c), (c,d), (d,a), (a,b)

which are the same but rotated

Mitch Schwartz

8:27 AM

@Lembik did you notice that a score of m for a given n will automatically give you score of (at least) m for k*n with any k>1 ?

Lembik

very interesting

an intriguing question is whether m= n-1 is always possible!

No I had not noticed!

Mitch Schwartz

8:42 AM

also if you have (m1,n1) and (m2,n2) then you can get min(m1,m2) with n = k1*n1 + k2*n2 for ki >= 1

wait a sec, scratch all that, i'm an idiot

the first one works though (by concatenating the first row to itself k times)

Lembik

9:05 AM

@MitchSchwartz maybe you could add some of these observations as comments? I think it helps inspire others to see some initial ideas

Or I could just wait for your answer :)

Mitch Schwartz

well overall i still don't have a better idea than exhaustive search, i think

there should be around binomial(n,n/2) ways to get m >= 2, which is huge

Beta Decay

meta.stackexchange.com/revisions/19478/22

Mitch Schwartz

9:26 AM

if there's always a solution with m >= n/2 then it might be a good idea to require that, for scoring's sake.

Maltysen

@BetaDecay your meme submission seems to have a lot of confusion in point-of-view. Was this intentional?

Martin Büttner

palindromic rep!

Mitch Schwartz

@Lembik your sentence "It is known that, except for 4 by 4 matrices, there are no circulant Hadamard matrices." isn't strictly true, since you didn't consider n=1 and n=2

Beta Decay

@Maltysen Uhh not really, I'll read over it again

Fixed

It's hard writing about yourself in the third person :P

Proof for the future ↑

Mitch Schwartz

9:42 AM

oh i rotated the rows the wrong way above, but it doesn't change the reasoning

Sp3000

Only 510 rep til the next palindrome!

Martin Büttner

not true

feersum

what wrong with 52625?

Martin Büttner

^

53535 is nicer for also having alternating digits though

Lembik

and n=1 is a slightly odd case

@MitchSchwartz n=2 doesn't work does it?

@MartinBüttner sorry!

Mitch Schwartz

9:57 AM

@Lembik you're right, n=2 doesn't work, sorry

Lembik

@MitchSchwartz yes.. sadly I don't know if there is or not!

@MitchSchwartz I improved the title, I hope

Mitch Schwartz

scoring could be tricky if you can describe infinite classes of solutions

Lembik

@MitchSchwartz Well.. the scoring scheme still works I think. You just get infinity until someone beats you for some finite value of n :)

you only get infinity if you are always at least as good as all the other answers

Martin Büttner

@Sp3000 I wonder if this approach is golfable, but so far it's 4 longer than yours E,7/Q*7ew7/z{_Lf|=},

Mitch Schwartz

oh, i misunderstood the scoring on initial reading

Lembik

10:05 AM

@MitchSchwartz I like the scoring scheme.. I have been working on it for a while :)

New Main Posts

0

Q: Sing the Australian National Anthem - joyfully!

We Australians have a pretty awful national anthem. Here it is in all its glory: To the tune of Advance Australia Fair Australians all let us rejoice, For we are young and free; We've golden soil and wealth for toil; Our home is girt by sea; Our land abounds in nature's gifts Of be...

code-golf kolmogorov-complexity

Mitch Schwartz

i think this may be clearer: Your score is the highest n such that for all k <= n, no one else has posted a higher correct answer than you.

Lembik

@MitchSchwartz yes! that is better

Martin Büttner

@BetaDecay you know "The integers will be in the range -(2^32-1) to 2^32-1." is ruining it for a bunch of esolangs, and I don't think it really adds anything to the challenge. Byte range or "any reasonable range your language supports, but at least 256 values" would probably be sufficient.

Beta Decay

10:29 AM

@MartinBüttner Oh, sure I'll change it

Any esolang in particular that you were thinking of?

Martin Büttner

Fission... but any language that can only store a) unsigned integers b) bytes c) can't read integers from stdin and therefore has to read byte values (or implement atoi just to compete)

Beta Decay

I see

New Meta Posts

0

Q: Code Golf Tutorials?

There are a lot of intelligent people of PPCG, and for that reason a lot of our usual challenges are hard. This means that we are throwing new users straight into the deep end with huge problems which they may not be able to solve. For that reason I propose we have a 'tutorial'. This may be a me...

discussion code-golf

Beta Decay

@Sp3000 I thought it was bad practice to put also at the start of a sentence

Mitch Schwartz

10:58 AM

@Lembik i haven't worked it out carefully, but i think m=1 is optimal for n congruent to 2 mod 4, because of parity

Optimizer

Oh, is it the palindromic rep day??

Beta Decay

It seems so

Lembik

@MitchSchwartz that's interesting!

Beta Decay

Martin Büttner

@Optimizer yes, 15/8/31 in binary is 1111/1000/11111 (slashes only for visualisation...)

2

Optimizer

11:02 AM

@MartinBüttner same for my comma

trichoplax

@orlp That's a really good idea.

Optimizer

Also, I did nothing special at all to come up for that rep. Pure luck.

Mitch Schwartz

also @Lembik there is an easy way to check orthogonality by taking bitwise xor and then checking that popcount is equal to n/2 (using 1 and 0 instead of 1 and -1)

Lembik

great!

Lembik

11:46 AM

@MitchSchwartz If you have any answers for small n, I would be very grateful for them

Mitch Schwartz

4 (4, '1101')
8 (4, '11000010')
12 (6, '110000010100')
16 (8, '1100000100111010')
20 (10, '11000010111011110100')
24 (12, '110000001011001111010100')

28 (14, '1100000010101100111110010100')

@Lembik ideone.com/MNOcFI

Transcript for