The Nineteenth Byte

quartata

12:00 AM

While I like Java's system of quotes, it doesn't make any sense for Perl.

There's no difference between a character and a string.

BlockCoder1392

String j = 'h' no worky

quartata

In Perl.

Not Java.

Holy shit:

1

A: Count common Game of Life patterns

Haskell: 2417 characters This took quite a while and there are still a few bugs, but I got several tricks working so it was worth it. Notes: It only accepts the plaintext format, passed to STDIN It takes something like O(n^20) time I assumed that the number of characters in non-comment lines...

A brand new user answered this insanely hard challenge that hadn't gotten any answers in 2 weeks

shower in upvotes

cat

@phase @Doᴡɴɢᴏᴀᴛ I see you starred my Mouse-2002 repo; you might be interested in mouse16 which is really indev, but derived, and Python, not C

BlockCoder1392

2417 ...

characters ...

quartata

@BlockCoder1392 So? it's a hard challenge

and it's Haskell

He'll win a bounty too

That's nice

BlockCoder1392

12:07 AM

Java would probably have like ovah 9000 ~~chars~~ bytes

Alex A.

> ovah

cat

@quartata Downgoat is this same Vihan dude, right?

Alex A.

Yes

quartata

@cat ye

TanMath

yes

I got triple ninja'd!

cat

12:07 AM

sweet :D

Alex A.

3

Q: Hey Stack Exchange, how are we doing?

The last time we heard from a Stack Exchange community manager was in March of 2014, when Grace Note came to talk to us about the progress we've made as a site. That was back when code-trolling was a thing, and the community's response to the news wasn't particularly positive given how code troll...

4

quartata

yassss

notice us pls

Alex A.

This is a plea for attention from our mommies and daddies at SE

Maltysen

someone pin that

Doorknob

nah

Maltysen

12:10 AM

shouldn't that be on main meta?

Doorknob

no, it's PPCG specific

Maltysen

oh

Alex A.

^^

Nobody in the greater SE network gives a shit about us

Maltysen

but do CM's look around site specific metas?

Alex A.

Yes

Calvin's Hobbies

12:11 AM

@AlexA. @Shog9 please take a look at :)

BlockCoder1392

^

Alex A.

Wow, 9 upvotes in 10 minutes with 13 views.

New Meta Posts

10

Q: Hey Stack Exchange, how are we doing?

The last time we heard from a Stack Exchange community manager was in March of 2014, when Grace Note came to talk to us about the progress we've made as a site. That was back when code-trolling was a thing, and the community's response to the news wasn't particularly positive given how code troll...

support beta-status site-health

Alex A.

@NewMetaPosts You silly billy.

I would turn you into an off topic nonsensical remark but I'd rather have this get more attention :P

Nathan Merrill

mx.com/hackthegibson

can anybody crack the code?

BlockCoder1392

12:20 AM

GET /htg

Calvin's Hobbies

What chatroom do CM's and such normally populate? chat.meta.stackexchange.com/rooms/89/tavern-on-the-meta ?

Maltysen

@Calvin'sHobbies idk, but I don't see a lot of blue there

Alex A.

@Calvin'sHobbies A special room that totally doesn't exist that moderators and employees totally do not convene in.

BlockCoder1392

I did a GET to /htg. Try it!

Maltysen

@AlexA. s/\*.*\*/

BlockCoder1392

12:25 AM

change the body inner html to responsETexT

Here's the reslut of GET /htg: pastebin.com/tjujuVJd @NathanMerrill

9001 years later...

Maltysen

wow time passed pretty quickly

BlockCoder1392

/time set 14000 hey, it's night

Nathan Merrill

@BlockCoder1392 I'm confused

why "responsETexT"?

BlockCoder1392

Stupid capslock.

responseText

Nathan Merrill

I'm pretty sure that's their home page

mx.com

BlockCoder1392

12:38 AM

facepalms

That was get /.

Nathan Merrill

regardless, I think the challenge is to decrypt "R0VUIC9odGc="

BlockCoder1392

Yup and it's "GET /htg"

Simple atobing

Nathan Merrill

ah I understand

ah

there's some C code

on that pagr

page*

BlockCoder1392

really?

i got nothin'

El'endia Starman

Today I learned: there are names for derivatives of distance beyond "jerk".

distance=distance/t^0
speed=distance/t^1
acceleration=distance/t^2
jerk=distance/t^3
snap=distance/t^4
crackle=distance/t^5
pop=distance/t^6
lock=distance/t^7
drop=distance/t^8

(Source)

Nathan Merrill

12:44 AM

lol

Calvin's Hobbies

@El'endiaStarman Then I think it's crosby, stills, and nash

Nathan Merrill

according to Wolfram alpha, distance^2/t^1 is stokes

BlockCoder1392

bla

quartata

1:07 AM

@El'endiaStarman lol

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@El'endiaStarman At first,I thought you were talking about "jerks" as in "bad people". I wish I could derive jerks :P

Seadrus

2

A: Best of PPCG 2015 — Now Accepting Nominations!

Showcase of Most Promising New Golfing Language [What the title says.] There seem to be quite a few of these new languages that have popped up in the last year. Nominations: Diamond Puzzles! by Dennis - Jelly Nominated by Alex A. Not only is this an interesting approach to the challeng...

"Most promising" meaning what

Calvin's Hobbies

Most likely to outgolf Pyth? (when done)

El'endia Starman

I was just about to say something like that.

Seadrus

darn

i was going to propose this

26

A: Shorten an already short mathematical expression

Emotinomicon, 48 bytes / 13 characters I do it, not because it is short, but because it is fun. Try it here. You'll have to copy+paste it into the textbox. 😼⏪🆙😦✖😎😿➕😨😼🆙😄⏩ Explanation: 😼 ⏪ 🆙 😦 ✖ 😎 😿 ➕ 😼 🆙 😄 ⏩ explanation 😼 ...

because its such a fun lang

but it has to be golfy? @El'endiaStarman

El'endia Starman

1:17 AM

@Seadrus There was a discussion on this last night, in fact. I think the general consensus is that the language must have been designed at least in part with golfing in mind.

Seadrus

oh

El'endia Starman

Minkolang sorta qualifies, but I'm not planning on nominating it.

The next language I make, yes.

Seadrus

hm

Cᴏɴᴏʀ O'Bʀɪᴇɴ

wait you're talking about Emotinomicon?!

WHY U NO PING MEH @SEADRUS

Calvin's Hobbies

1:31 AM

@CᴏɴᴏʀO'Bʀɪᴇɴ is 👯 a command?

Cᴏɴᴏʀ O'Bʀɪᴇɴ

... I don't think so. It can be. Why?

El'endia Starman

On a different subject, I've thought of the line "to sleep, perchance to dream" fairly often over the past few weeks, usually before going to bed. Finally Googled it and it turns out to be from the "To be, or not to be" soliloquy and is about suicide. Well then.

I've been trying to figure out where I read or heard that line with little success.

Calvin's Hobbies

@CᴏɴᴏʀO'Bʀɪᴇɴ Just a neat character

Cᴏɴᴏʀ O'Bʀɪᴇɴ

huh

@El'endiaStarman o-o

El'endia Starman

Suffice to say, I was taking it more literally.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

1:35 AM

XD

BlockCoder1392

Calvin's Hobbies

@El'endiaStarman Watched Frasier recently?

El'endia Starman

Nope, didn't know of that.

Calvin's Hobbies

@BlockCoder1392 kinda fuzzy

BlockCoder1392

true dat

but

blame bitmap

Cᴏɴᴏʀ O'Bʀɪᴇɴ

1:45 AM

use png

Nathan Merrill

anybody here a javascript guru?

BlockCoder1392

me

@CᴏɴᴏʀO'Bʀɪᴇɴ ... I opened the .ico file. Zoomed to 500%, and snipped.

Nathan Merrill

I'm wanting to store a grid of objects

each object will have an (x,y) pair

x and y are positive/negative integers

Calvin's Hobbies

@BlockCoder1392 Why make an ico in the first place? Favicon can be png

Nathan Merrill

therefore, I need to use an object to store them, correct?

BlockCoder1392

1:47 AM

@Calvin'sHobbies blame favicon.cc

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@NathanMerrill me too

Nathan Merrill

if so, is there a standard way to do it?

BlockCoder1392

@NathanMerrill I think.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@NathanMerrill 2d array

Nathan Merrill

negative indicies?

Cᴏɴᴏʀ O'Bʀɪᴇɴ

1:48 AM

As long as you don't need to use array built-ins, I think it works

Calvin's Hobbies

@NathanMerrill So you want a 2D array or a hash where (x,y) tuples are the keys? Both have advantages

Nathan Merrill

doesn't matter

BlockCoder1392

var a = {x:7, y:-7}; var b = {x:4, y:-9}; var c = [a,b]

^ try that?

Nathan Merrill

both are essentially O(1) access

@BlockCoder1392 that's not what I want at all

var a = {...stuff...};
var b = {...stuff...};
// Store a at (5,6)
// Store b at (-4, 3)
// Retrieve object at (-4, 3) should return b

BlockCoder1392

Oh

i misunderstood

Nathan Merrill

1:51 AM

the best way I can think to do it is an object with keys of x+","+y

but since I'm not well versed in javascript, I thought I should ask here

Calvin's Hobbies

2D array version: jsfiddle.net/CalvinsHobbies/sufthw64

var width = 10, height = 6;

var grid = new Array(width);
for (var x = 0; x < width; x++) {
	grid[x] = new Array(height);
  for (var y = 0; y < height; y++) {
		grid[x][y] = 0; //initial value
  }
}

BlockCoder1392

var a={sa:2,sad:"213cxsdAS"};var b={bdgahs:3,bnameee:"bobb"};var c = {-4,3: a, 5,6: b}

Nathan Merrill

@Calvin'sHobbies but arrays can't handle negative indexes?

Calvin's Hobbies

Ah, no

BlockCoder1392

Oh wait

Cᴏɴᴏʀ O'Bʀɪᴇɴ

1:54 AM

> a=[0,1];a[-1]=3
> a[-1];
< 3

Calvin's Hobbies

@NathanMerrill Then you can use objects as keys, e.g.

var points = {}
points[{x: -1, y: 4}] = 9
alert(points[{x: -1, y: 4}]) //prints 9

Nathan Merrill

what?

you can use objects as keys?

can you use arrays?

probably, an array is just an object

Cᴏɴᴏʀ O'Bʀɪᴇɴ

The array is stringified

BlockCoder1392

^

Cᴏɴᴏʀ O'Bʀɪᴇɴ

> a={};b=[0,1];a[b]=3;
> a
< Object { 0,1: 3 }

Calvin's Hobbies

1:58 AM

@CᴏɴᴏʀO'Bʀɪᴇɴ Ah, right

Nathan Merrill

I'm ok with stringification

that code looks the cleanest

thanks

Cᴏɴᴏʀ O'Bʀɪᴇɴ

np

Calvin's Hobbies

If you know the bounds of the values you could map each grid cell to a unique int and use the ints as the keys. Probably faster than strings but less convenient

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@NathanMerrill Just integers, right?

Nathan Merrill

I do know the bounds, but I'd prefer to keep things clean

I'm not worried about runtime right now

I write clean code first, efficient code second

Cᴏɴᴏʀ O'Bʀɪᴇɴ

2:01 AM

> a={};b=[0,1];c=[0,"1"];a[b]=3;
> a[c];
< 3

J Atkin

Opinion poll: Would it be an improvement to this question if I added a rule that you must support parentheses?

Nathan Merrill

No

Cᴏɴᴏʀ O'Bʀɪᴇɴ

Are there answers?

Nathan Merrill

its in the sandbox

@JAtkin adding parenthesis makes parsing significantly harder

Cᴏɴᴏʀ O'Bʀɪᴇɴ

^

J Atkin

2:07 AM

Exactly

Nathan Merrill

your challenge isn't about parsing

unless there are statements you can't represent without parenthesis, I wouldn't add them

J Atkin

Ok - fair enough

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@NathanMerrill All statements can be represented by a series of NAND gates.

And simplified by DeMorgan's law

Nathan Merrill

now, that said, somebody should make a "simplify this boolean expression"

yeah, I definitely don't know why there isn't a challenge on that

goes and starts writing

phase

20 minutes until I can Melee Netplay :D

GamrCorps

2:13 AM

@NathanMerrill Like this? codegolf.stackexchange.com/questions/61487/…

Nathan Merrill

No

like this: sandbox.mc.edu/~bennet/cs110/boolalg/simple.html

Dennis

4

A: Is 0x9B (155decimal) a special control character? Why is it missing from ascii tables?

Careful, friend. You have come across the ASCII symbol of the beast. It is not to be displayed, transmitted or encoded in any way. Those who even dare to discuss it on Stack Overflow will soon find their internet connection has been termi

How did that not get deleted?

Calvin's Hobbies

@CᴏɴᴏʀO'Bʀɪᴇɴ But you need parens to group things. Like a AND b is (a NAND b) NAND (a NAND b). Can you rewrite it with the form x NAND x NAND x NAND ...?

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@Calvin'sHobbies eer

piss

My mind is dead atm

quartata

2:27 AM

se senpai hasn't noticed us yet

@AlexA. You mean the Teacher's Lounge?

Dennis

bans quartata

quartata

Oh right.

Yeah, I don't know what Alex is talking about.

There's no such thing

looks around nervously

Anonymous

4

quartata

C is more like an ancient arquebus that backfires in your face 10% of the time

Also Perl is still incredibly useful wtf

Lost it at the PHP one 10/10

Anonymous

Molotovs are incredibly useful if you need to set stuff on fire a lot

quartata

2:34 AM

the mathematica one

where did you find this

it's perfect

Anonymous

My gf sent it to me

Anonymous

5

A: Sandbox for Proposed Challenges

Image Blending Given an image in plain PPM (P3) format as input, for each pixel p in the image, replace each of the following 4 pixels' red, green, and blue with the floored average value of the respective channels of all 4 pixels: p itself The pixel located at p's location when the image is f...

Anonymous

^ any more feedback?

Anonymous

Taking suggestions for a better title :P

Anonymous

codingame.com this looks cool

Cᴏɴᴏʀ O'Bʀɪᴇɴ

2:42 AM

@Mego I thought you were referring to the molotv

Anonymous

@CᴏɴᴏʀO'Bʀɪᴇɴ That's only on Tuesdays

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@Mego Oh, silly me.

Thomas Kwa

Do we have a "diagonals of an array" challenge?

I've been looking for one, and can't find it.

Anonymous

@ThomasKwa Explain?

Maltysen

I rofled at the C# one

Dennis

2:53 AM

@ThomasKwa We have a language-specific tips question, but I don't think we have a challenge.

Thomas Kwa

@Mego [[3,1,4],[1,5,9],[2,6,5]]=>[[4],[1,9],[3,5,5],[1,6],[2]]

Dennis

Disclaimer: I have terrible memory.

quartata

Hmm, what would CJam and Pyth be if they were weapons?

Maltysen

Pyth would be a swiss army kinfe

too much overloading

Thomas Kwa

@Maltysen I agree

"Lisp is a shiv which comes in many forms. Anyone who uses this is probably crazy and dangerous."

quartata

2:56 AM

This is true

Not even a joke really

Thomas Kwa

Hmm

Maltysen

relevant:

quartata

I think the Prolog and the PHP ones are the best

Maltysen

I've just received word that the Emperor has dissolved the MIT computer science program permanently.

Thomas Kwa

I think I need to learn Lisp

Anonymous

2:57 AM

CJam would be an overcooked grenade

Thomas Kwa

Why?

quartata

@ThomasKwa If you learn any one LISP variant, learn Clojure

There's no point in torturing yourself with Common LISP

Thomas Kwa

Noted.

Anonymous

Because if you don't get it out fast, it'll blow up in your face (read: Dennis or Martin will FGITW you)

quartata

Scheme is nice but not practical

Thomas Kwa

2:58 AM

Oh, I was also thinking of learning Pascal. Should I?

quartata

God no

Dennis

On principle, I will never learn a language where curly brackets are used for comments.

Thomas Kwa

What's a good language from the 80s or earlier to learn?

Dennis

I mean, it has to be the devil's work.

Maltysen

@Dennis IIRC scheme uses semicolons

quartata

3:02 AM

@ThomasKwa Perl

Anonymous

@ThomasKwa C

Maltysen

^ but you probably know it already

quartata

perl or riot

Thomas Kwa

I don't know C, but it's already on my list.

Maltysen

@ThomasKwa that should be at the top

quartata

3:03 AM

Don't listen to them

You can run C code with a Perl module if you need to

Perl is best

All you need is Perl

Thomas Kwa

C++ is first, actually; then Mathematica.

Maltysen

@ThomasKwa ಠ_ಠ why is c++ before c?

Thomas Kwa

@Maltysen Why not?

quartata

I'll probably get lynched for saying this but C++ isn't that useful nowadays unless you need something really fast or you need a library

Java's OOP model is much more sane

Calvin's Hobbies

Mini challenge: remove all prime digits (2 3 5 7) from the input string of digits (0-9)

quartata

3:05 AM

one second writing pyth solution

Maltysen

@Calvin'sHobbies -zjkP210

quartata

god dammit

Wouldn't use filter be shorter?

Thomas Kwa

APL: ~∘'2357'

Calvin's Hobbies

Jot?

quartata

Like split, filter prime?

Maltysen

3:06 AM

@quartata idk, that was my <20 second solution

@Calvin'sHobbies -z"2357

7 bytes

quartata

oh that's even easier

Maltysen

^yeah I was being stupid earlier

Thomas Kwa

Wait, I thought - did substrings

Cᴏɴᴏʀ O'Bʀɪᴇɴ

APL is a sniper.

Thomas Kwa

Huh, it doesn't

Maltysen

3:08 AM

wait @Calvin'sHobbies will it be an actual string?

or can it be a list of digits

Dennis

@Calvin'sHobbies GolfScript, 7 bytes: "2357"-

Thomas Kwa

@Dennis Does Jelly have a without?

Dennis

Not yet.

String manipulation is still pretty much non-existent.

The best you could do with Jelly right now is filter: f“014689 (8 bytes)

Maltysen

alternative 7 chars: sftPsTz

Anonymous

@Calvin'sHobbies Seriously, 12 bytes: 4r`P$`M,#sΣΣ

Thomas Kwa

3:16 AM

Using C doesn't save any bytes: -z`C" 5

quartata

I've been thinking about making a stack based language with 4-bit instructions

Anonymous

Can probably be much improved

quartata

Obviously have to do a lot of overloading

I think I can make it work though

@Maltysen ah so that does work

Not any golfier though

Maltysen

@ThomasKwa but P does if I can take as a list instead of as a string

quartata

That way you don't have to split at the beginning

sftPQ, right?

Maltysen

3:18 AM

I was talking about -QP210

quartata

Oh

Anonymous

Another solution for 12: ,#;`≈pY`M@░Σ

Thomas Kwa

@quartata Filter is lambda T.

quartata

oh der

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@Calvin'sHobbies Jolf, 5 bytes: -im 4

Anonymous

3:23 AM

Python: lambda x:''.join([y for y in x if y not in"2357"])

Anonymous

I'm not bothering to count the bytes :P

Anonymous

Last call for feedback before posting to main (a better title would be appreciated)

Cᴏɴᴏʀ O'Bʀɪᴇɴ

Lemme think of one

Thomas Kwa

@Mego You don't need the []

Anonymous

@ThomasKwa What []? For the link?

Sp3000

3:27 AM

In the Python you posted

Thomas Kwa

No, for the Python.

Anonymous

Oh

quartata

Did anyone send a link for our beta health question to a community manager/ping a community manager in the Meta Tavern or one of their "offices"

I don't want to nag them... but....

Anonymous

This is why we have a reply button, guys :)

FryAmTheEggman

@Mego also you can golf a bit by doing y[condition] instead of if condition

Sp3000

3:29 AM

f=lambda s:s and s[0][s[0]in"2357":]+f(s[1:])

Cᴏɴᴏʀ O'Bʀɪᴇɴ

prime remover

Anonymous

I'm dumb

Anonymous

Prime remover, Seriously, 8 bytes: "2357",-

Maltysen

^ that looks to be the optimal algorithm in most languages

Anonymous

I forgot I fixed subtraction for strings

Cᴏɴᴏʀ O'Bʀɪᴇɴ

3:33 AM

@Maltysen Mine's similar, but different.

Sp3000

@FryAmTheEggman Fair point - generator seems to beat recursion for stuff like this :/ lambda s:''.join(c[c in"2357":]for c in s)

(even with f=)

Cᴏɴᴏʀ O'Bʀɪᴇɴ

3:50 AM

this room died

Anonymous

attempts cpr

Cᴏɴᴏʀ O'Bʀɪᴇɴ

You're making out with the room?

:P

Anonymous

Nah I use one of those bag thingies

Anonymous

Duh

Cᴏɴᴏʀ O'Bʀɪᴇɴ

o_o

Anonymous

3:54 AM

Anonymous

Respirator is the word I couldn't think of

Cᴏɴᴏʀ O'Bʀɪᴇɴ

Ohhh

Sp3000

Do people just carry that around in case of an emergency or something? I wouldn't imagine it'd be on-hand easily.

quartata

I just realized how annoying pl would be if we ever get another programming language quiz

Cᴏɴᴏʀ O'Bʀɪᴇɴ

why?

quartata

3:55 AM

Bareword strings

Cᴏɴᴏʀ O'Bʀɪᴇɴ

ohh

quartata

Basically type whatever you want + pop + Hello, World!

Anonymous

@Sp3000 Ambulances almost always have them, medics usually will have one nearby while they're on duty

Sp3000

But the ambulance would take too long to arrive! D:

Cᴏɴᴏʀ O'Bʀɪᴇɴ

MEDIC!

Anonymous

3:57 AM

Even an untrained person can give CPR, though the red cross recommends not trying to respirate if you're untrained

Anonymous

As long as they know to push really hard and hum "Stayin' Alive", they're set

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