The Nineteenth Byte

Dennis

5:00 PM

@quartata Isn't that just .f?

quartata

err... I don't think so?

What does .f do? :P

Dennis

Find first n matches.

quartata

Oh.

Well then.

Nathan Merrill

hmmm, another advantage of using redis is that the master controller can be in any language

quartata

That's exactly what I was looking for.

:P

Cᴏɴᴏʀ O'Bʀɪᴇɴ

5:03 PM

@VoteToClose \\o// cannot wait to try it out.

VoteToClose

Lol, waving arms?

Cᴏɴᴏʀ O'Bʀɪᴇɴ

yes

Dennis

Dam son, that's a lot of slashes.

Nathan Merrill

@CᴏɴᴏʀO'Bʀɪᴇɴ try out what?

Cᴏɴᴏʀ O'Bʀɪᴇɴ

Vitsy verbose mode. Look at the reply.

Nathan Merrill

5:06 PM

I couldn't figure out where @ was pointing to

quartata

Well I tried something with .f

and somewhat annoyingly it is also 21 bytes

h_.f:`Z"^[46890]+$"0Q

That's mostly because of the regex.

Is there a built-in for "only consists of these characters"?

Neil

Why not use "doesn't contain any of the characters 12357"?

quartata

That's longer.

Neil

ah, it's shorter in JS

!/[12357]/.test(n) as opposed to /^[46890]+$/.test(n)

Dennis

@quartata Why use any of that all all? This is just base conversion...

PhiNotPi

5:14 PM

Some of my friends and I have a GroupMe chat going. Somebody just changed our group name to the Navy Seals copypasta.

New Main Posts

0

Q: Extend the line

Task Given an image with a line on it, produce or display an image with the line extended the the line to the edge of image. The line is black and the background is white. The image size is 100x100 The image comes in any reasonable format (e.g. jpg, png, ppm, bmp). Line format I'm using a simp...

quartata

@Dennis You mean like convert from base 10 to bijective base 5?

Dennis

This isn't bijective. 0 cannot occur as first digit.

Nevermind. The challenge just changed substantially.

quartata

? It did?

oh whoa

That's a completely different challenge.

Hm.

New Main Posts

1

Q: Count Mills in Nine Men's Morris

Introduction Nine Mens's Morris (also called Mills) is a board game for two players which is played on the following board (image taken from the linked Wikipedia-page): Each player has 9 men, colored black and white. The concrete rules are not important for this challenge, but check out the Wi...

code-golf game grid board-game

Anonymous

5:27 PM

@quartata Yeah as it stood, it was a dupe of the Kleene star challenge, as Peter pointed out

Dennis

I'm not sure I agree. The leading zero makes it different enough IMHO. (Then again, I rarely think anything is a dupe of anything else.)

Anonymous

So I changed it to what I was considering doing as a follow-up challenge

Dennis

Jelly really needs an equivalent to Pyth's .f.

quartata

I just noticed somewhat annoyingly that .P doesn't actually work for numbers greater than the length of the array

Geobits

Is it even feasible to do the HTML entities in a non-esolang for less than triple what it would be for a builtin (since that's the penalty)? It seems not worth it to do it "right" :/

quartata

5:35 PM

Without compression? Doubt it.

The penalty is pretty low, actually.

New Main Posts

0

Q: Coolest tweet sized javascript (d3) art

The competition is to create the coolest tweet sized d3 visualization as you can find here: https://t.d3fc.io/ Some examples: https://t.d3fc.io/playground/699900943366799360 - patterns https://t.d3fc.io/playground/699625114221076480 - James Bond https://t.d3fc.io/playground/69925087245540147...

popularity-contest javascript

Geobits

Oh, wait. I just saw this:

quartata

If a built-in is say, 20 bytes...

Geobits

> Any HTML entity that produces a character that isn't on that list, or that is invalid, should be left untouched (E.g.: &, &etilde;, &a;)

Nathan Merrill

62

Q: fastest (low latency) method for Inter Process Communication between Java and C/C++

I have a Java app, connecting through TCP socket to a "server" developed in C/C++. both app & server are running on the same machine, a Solaris box (but we're considering migrating to Linux eventually). type of data exchanged is simple messages (login, login ACK, then client asks for something, ...

java c++ performance ipc latency

Geobits

5:37 PM

That probably kills most builtins, but seems really arbitrary.

Nathan Merrill

looks like pipes is the fastest method

Dennis

@Geobits Most parts of this challenge do.

quartata

I don't understand why he didn't just ban builtins....

Rainbolt

@quartata He explained that much in the comments. Go complain where he can see it.

quartata

"what cool built-in stuff people can come up with"

Hm.

Geobits

5:40 PM

Well, with or without builtins it's still just "replace this list of text with this list of text", which isn't very interesting anyway imo.

Anonymous

^

Missed it

ha, yeah

Come back when we hit 5555

quartata

5:42 PM

@Doorknob !

Dennis

Huh? The front page says 4,981.

Doorknob

@Dennis Doesn't count locked questions

Geobits

Almost at 50k answers, though. Maybe you can keep a bette eye on that one >_>

Dennis

With locked questions, it's 5,009...

Geobits

@Dennis My front page says 5003...

Doorknob

5:43 PM

Search says 5005

quartata

It says 5,003 for me.

TimmyD

Mine shows 5001

Doorknob

In any case, we recently passed 5k \o/

Rainbolt

Random fact: Stack Overflow has approximately 2216 times as many questions as we do.

Dennis

4981, 5001, 5003, 5005, 5009... :D

TimmyD

5:44 PM

> 98% Answered

Doorknob

@Rainbolt Actually, they have about the same number of real questions. The rest are just about string equality in Java.

7

TimmyD

Dennis ... ಠ_ಠ

Roujo

@Rainbolt Do they have 10/day, though. 'cause we have that.

Rainbolt

I think they have 10/minute

lol

Where are the site stats for SO?

Is that only for sites that came from A51 originally?

quartata

I don't know.

@Rainbolt I think so.

Looks like SO in Russian had 115 (!) questions per day.

Anonymous

5:45 PM

You can get site stats in SEDE

quartata

Only a 1.7 answer ratio lmao

Rainbolt

In Russia, question ask you.

Nathan Merrill

@Doorknob they have about the same percentage of string equality as we have kolmogorov complexity

TimmyD

@Dennis Statistically, this means we actually have 4999.8 questions, so we're still short of 5000 ;-)

Anonymous

data.stackexchange.com/stackoverflow/query/428324/…

Anonymous

5:46 PM

7174/day for SO

Dennis

@TimmyD ಠ‾ಠ uʍop ǝpᴉsdn uʍoɹɟ ʇɐɥʇ uɹnʇ

Rainbolt

@Mego I have no idea how the questions per day metric is calculated, but I don't think it's an average of the entire lifetime of the site. I think it's a sliding window. Otherwise we'd never be able to fluctuate so much.

TimmyD

@Dennis (╯°□°）╯︵ uʍoɹɟ

quartata

@Dennis I turned my head upside down per your instructions and broke my neck. I will now be suing you for everything you've ever owned, thought about owning, or couldn't possibly afford to own.

Anonymous

@Rainbolt and DATEDIFF(hour, CreationDate, GETDATE()) <= 14*24 It's a 2-week sliding window

Dennis

5:47 PM

@quartata The latter part will be the most profitable.

Rainbolt

Oh. My bad

Anonymous

2-week sliding window, updating hourly seems to be the most accurate for A51 (disregarding that SEDE takes forever to update)

quartata

@Mego 7174??

Anonymous

@quartata Yeah it seems insane but it's accurate

quartata

No wonder you don't ever see good answers there anymore.

VoteToClose

5:49 PM

Woah.

quartata

According to your query we have 9 questions a day

Anonymous

@quartata That's because SEDE is somewhere between 24 and 48 hours behind on posts at any given time

quartata

Ah.

@Dennis Relevant:

@Bobby: On your advice, I placed a disclaimer on my door that any female who enters may be molested. I was subsequently arrested and spent the next five years in jail. I am now going to sue you for everything you have owned, wanted to own, have seen, your family members have owned or thought about owning, and stuff you couldn't possibly want or afford. — Won't May 13 '11 at 13:24

Rainbolt

I wonder why switch statements use colons instead of braces.

switch (val) {
    case ("foo") {
        break;
    }
    case (default) {
        break;
    }
}

Heck, I threw in some parentheses too

quartata

ew looks ugly with parens

TimmyD

5:54 PM

@VoteToClose Yeah, it's definitely a neat challenge, just waaaaay too big.

Anonymous

New insult: "You couldn't hit the broad side of a popcon"

6

VoteToClose

@Rainbolt Not necessarily defined to break after the case finishes.

Geobits

Braces don't break at the end either :/

VoteToClose

@Geobits They appear to, though. Colons don't separate.

Dennis

> Now, if you will excuse me, I have some more legal questions about my upcoming case I must submit to the community.

hahahahaha

Geobits

5:58 PM

@VoteToClose So you're arguing that colons should be used for things like if and while? You're getting dangerously close to heretic/pythonista territory.

Anonymous

@Geobits ಠ‾ಠ

quartata

@Dennis Truly the golden era of Meta

Dennis

translate: pitonisa

(from Portuguese) Pythia

translate es: pitonisa

(from Portuguese) Pythia

VoteToClose

@Geobits No - if and while designate a beginning and ending to a group of statements that are only executed if something is true.

Dennis

Awesome.

quartata

6:00 PM

> es

> portuguese

TimmyD

Clearly, BATCH file has the best ternary style statements

quartata

Go home Bing you're drunk

Roujo

@Rainbolt Yeah, that'd make it easier. I ran into scoping issues last week because of that. >_>

Nathan Merrill

have any of you used ZeroMQ?

TimmyD

CALL :a&&GOTO :c||GOTO :b

Nathan Merrill

6:01 PM

it looks like exactly what I want

Anonymous

@TimmyD That's atrocious, offensive, and legally dubious

Dennis

@quartata It was supposed to be a pythonista -> pitonisa -> oracle -> Java pun. Thanks for playing along, Bingeling.

Geobits

@VoteToClose I suppose. The problem I guess is that you can brace basically anything, so it's not like the braces themselves really tell you anything about the control flow.

Anonymous

@Dennis Bingeling sounds like a miniature alcoholic

3

VoteToClose

I suppose you could also technically brace case statements.

Anonymous

6:03 PM

alcoholista

Rainbolt

Another idea: make break implicit and make fallthrough explicit.

VoteToClose

case: {
  stuff();
}

Geobits

@Rainbolt I'm not such a fan of that, tbh. I do think that parens and braces would look more natural when compared with the rest of the code, though.

Roujo

switch (thing)
{
	case Thing.Foo:
		var connection = new FooConnection();
		doThing(connection);
		break;
	case Thing.Bar:
		var connection = new BarConnection();
		doThing(connection, ThingOption.Bar);
		break;
}

Dennis

Why use brackets and braces when you have perfectly acceptable colons and whitespace? o_O

Roujo

6:04 PM

This doesn't compile in C#

Nathan Merrill

Another idea: remove switch statements

Anonymous

Best idea: don't have switch-case statements, and do everything with a dict!

Nathan Merrill

ninjaed :)

quartata

ninja'd

Roujo

Because the second "connection" declaration fails, since there's already a "connection" declared in the scope.

Which I feel is a bit silly, really

quartata

6:05 PM

Anything involving C# is silly.

TimmyD

@Roujo Well, that kinda makes sense, since I imagine they're two different parts of the compilation pipeline.

Roujo

@quartata Heh. It's not all bad I'd say. I'd rather be doing F#, but eh =P

Anonymous

{Thing.Foo:lambda:doThing(FooConnection()),Thing.Bar:lambda:doThing(BarConnection(), ThingOption.Bar)}[thing]()

Geobits

@Dennis Because colons are used for basically nothing else in the language having to do with control flow? It's an oddball holdover IMO. You can argue that they're labels and goto and all that, but most people don't use labels except in really rare circumstances.

Roujo

@TimmyD It does kinda make sense, but I don't see why each case wouldn't be in their own scope by default.

TimmyD

6:07 PM

A separate scope for each case?

Dennis

@Geobits No, I mean keep switch statement as they are and change everything else. Python way is best way.

Geobits

@Dennis I figured that, but thought if I ignored it, it would go away :P

Dennis

hahaha

Roujo

It feels like a non-obvious "gotcha", although one that is easily memorized and worked around. Not that bad, but still.

Anonymous

So much Python hate

Geobits

6:08 PM

It's recent. I never hated python until I started using it for something.

Anonymous

Thoughts on this challenge?

Anonymous

2

A: Sandbox for Proposed Challenges

Holy Numbers In many fonts (specifically in the Consolas font), 5 out of the 10 decimal digits have "holes" in them. We will call these holy digits: 46890 The 5 unholy digits are thus: 12357 An integer may thus be classified as "holy" if it only contains holy digits, and "unholy" otherwise...

quartata

? What's wrong with Python

Geobits

That's when I figured out why some people hate it.

Anonymous

(other than "omg y u change it when I almost had a solution")

VoteToClose

6:08 PM

You guys know that goto is actually a keyword in Java. >.>

TimmyD

Relevant: dennis.bloggingabout.net/2006/01/18/switch-statement-humor

Roujo

@TimmyD Yes. I can't do anything meaningful with "connection" in the second case anyway. =P

Nathan Merrill

? I've always been happily surprised by python

quartata

@VoteToClose Yes, it's reserved so that the compiler can tell you that you're stupid for using it

Just like const

VoteToClose

@quartata Yup. D:

Geobits

6:09 PM

@VoteToClose Yes, but it's hardly ever used. That was my point.

quartata

@Geobits It isn't ever used.

It can't be...

VoteToClose

^

Anonymous

I used to dislike Python's lack of switch-case statements, but then I learned to stop worrying and love the dict-lambda idiom

2

quartata

It throws an error.

VoteToClose

Support was removed in... 4? 5?

Can't remember.

Anonymous

6:10 PM

Labels are still around though, and they're used for exactly one thing: breaking out of loops

Geobits

@quartata Ha, yes. I was thinking break label; for some reason :/

VoteToClose

^^ I actually use them frequently.

Anonymous

ninjo'd?

Anonymous

If the cleanest way to get out of a loop is with a labeled break, you probably need to rework your code :)

Geobits

Every time I think break label; is the best way to go, I look at my code for another twenty minutes to find a better way to do whatever I'm doing.

VoteToClose

6:11 PM

@Mego I just got the Dr. Strangelove reference. >.>

Geobits

Damn ninja

Anonymous

ninjo'd again :D

VoteToClose

You just got ninja ninja'd.

So... who's gonna put the "ninja'd" thing in the meme list?

TimmyD

Doesn't C# still have goto as well? I thought that was used for control flow in switch statements.

Anonymous

> goto ... control flow

Anonymous

6:12 PM

goto is like the opposite of control flow

TimmyD

>.>

Anonymous

It's pissing into the wind and hoping you don't get a splashback

TimmyD

You know what I meant :p

Geobits

control jerky motion?

Roujo

@TimmyD Huh, I didn't know that: msdn.microsoft.com/en-us/library/13940fs2.aspx

TimmyD

6:14 PM

@Roujo Oh gods, that example is horrendous. Who writes code like that?

Nathan Merrill

why is it ninja'd?

what if I samuri'd?

Anonymous

@TimmyD Bill Gates

Geobits

@TimmyD I'm never not going to be ninja'd today, am I? :o

Nathan Merrill

kung fu'd

Anonymous

@NathanMerrill samurai'd?

VoteToClose

6:15 PM

bearmonkey'd

Nathan Merrill

wwf'd

Roujo

@NathanMerrill You can see samurais coming. Ninjas, less so.

Geobits

Ninjas are fast and sneaky.

Anonymous

Ninjo > ninja

Geobits

That's it, I'm done.

Roujo

6:15 PM

@Geobits Ninja'd on a ninja comment. Nice.

Anonymous

ninjaception

Nathan Merrill

jijna'd

Anonymous

jenga'd

Dennis

@Mego Any runtime restrictions? Setting h to 40 could take some time for naïve approaches.

TimmyD

@Geobits You just got Geobits'd ... it's a thing, now. :p

Geobits

6:16 PM

-1 ambiguous. Geobits'd is already "downvoted".

Anonymous

@Dennis Nope. I'm not going to test for h that high. I'll just trust that it works based off of lower h testing.

TimmyD

@Geobits Overloaded operator.

Anonymous

Geobytes'd: when you're 8 times too slow on a comment and someone beats you to it

Geobits

Ah shit. That's catchy.

Nathan Merrill

so, if I intentionally ninja a comment, does that mean it was actually pirate'd?

Anonymous

6:18 PM

@NathanMerrill no go home

Dennis

@Mego You say nth. Is 0 the 0th? (Ew.)

Roujo

@Dennis Zeroth is usually how I see it, yeah.

Anonymous

@Dennis Yes; zero-indexed

Nathan Merrill

yes 0th

Anonymous

We're all programmers here, no need to be afraid of the 0

Roujo

6:19 PM

Zeroth law of thermodynamics

The zeroth law of thermodynamics states that if two thermodynamic systems are each in thermal equilibrium with a third, then they are in thermal equilibrium with each other. Two systems are said to be in the relation of thermal equilibrium if they are linked by a wall permeable only to heat, and do not change over time. As a convenience of language, systems are sometimes also said to be in a relation of thermal equilibrium if they are not linked so as to be able to transfer heat to each other, but would not do so if they were connected by a wall permeable only to heat. Thermal equilibrium between...

Geobits

0th is stupid. Sorry, but it just is.

TimmyD

@Roujo "Zeroth" always sounds like some ancient Sumerian deity or something.

Dennis

You can index your array however you want, but the leading item is still the first. 0th is very, very wrong IMHO.

2

Anonymous

Mmkay, I'll change it

TimmyD

To completely change topics ... anyone else like peanut butter and muenster sandwiches?

Roujo

6:21 PM

@Dennis Right, that makes sense. All of the uses of zeroth I know of are cases of "shit, we forgot about this thing that comes before". =P

Nathan Merrill

lets all commit to 0nd then

Geobits

@TimmyD No.

@NathanMerrill Better than 0st :P

Anonymous

0rd

Nathan Merrill

this entire conversation has already been ninja'ed: chat.stackexchange.com/transcript/message/27083995#27083995

including Geobits complaints

Roujo

@NathanMerrill So Geobits ninja'd himself. Nice.

Geobits

6:23 PM

Oh I know. If we avoided all topics previously discussed, this room would suck.

Anonymous

@Roujo So he both ninja'd and Geobytes'd himself

TimmyD

> The first rule of The Nineteenth Byte is ...

Geobits

@TimmyD ... we all float down here?

TimmyD

Feb 10 at 19:59, by Mego

30 minutes later is like sumo'd

So what's several weeks later?

Roujo

Your mom'd?

Geobits

6:26 PM

I dunno, but Nathan did it too with his 0nd comment, so at least I'm not alone :D

Anonymous

@TimmyD Jupiter'd

Hi

Heya

salut!

greets

Anonymous

6:26 PM

spam

Cᴏɴᴏʀ O'Bʀɪᴇɴ

maps

Geobits

<generic-greeting>!

Cᴏɴᴏʀ O'Bʀɪᴇɴ

[oddly specific greeting]

Zgarb

Terve!

Anonymous

Geobits

6:28 PM

System.out.print(greetings.get(rand.nextInt(greetings.size()));

Nathan Merrill

Anonymous

from random import*;print choice(greetings)

Geobits

Some greetings are fine. How else would Marky learn?

Cᴏɴᴏʀ O'Bʀɪᴇɴ

Roujo

お早う！

Anonymous

6:29 PM

@NathanMerrill <in which I point out that it doesn't matter from a historical perspective>

TimmyD

$greetings|random

Cᴏɴᴏʀ O'Bʀɪᴇɴ

早__早

$greetings.getRandEl()$

Anonymous

Chat mini challenge: given a list/array/iterable/enumerable/whatever called greetings (or such a thing on top of the stack, for stack-based langs, or at the current position on the tape, or whatever), print out a random element

Nathan Merrill

Cᴏɴᴏʀ O'Bʀɪᴇɴ

^

TimmyD

6:32 PM

@Mego Byte count deduction for length of the variable name?

Anonymous

Seriously, 1 byte: J

Anonymous

@TimmyD Of course

Anonymous

@NathanMerrill <points out that actually greetings/goodbyes are to signal arrival/departure when it would otherwise not be obvious>

TimmyD

3 mins ago, by TimmyD

$greetings|random

PowerShell v2+, 6 or 7 bytes, depending upon if you count the |

Morgan Thrapp

Pylons, 3 bytes: l@r

Anonymous

6:33 PM

Or, to fulfill the "variable" part, "greetings"└J

Nathan Merrill

quartata

I never tried to make a new Pyth program for the new holy numbers

one second

Cᴏɴᴏʀ O'Bʀɪᴇɴ

greetings[greetings.length*Math.random()|0]

@quartata ??

Geobits

int a=greeting.length;System.out.print(greetings[a*=Math.random()]);

Cᴏɴᴏʀ O'Bʀɪᴇɴ

It's something like _Rx in Jolf, so two bytes.

Anonymous

6:36 PM

@Geobits Warning: not random

Anonymous

Java uses a LCG, which has two main flaws:

Geobits

@Mego How random do you want it to be? Math.random() is generally accepted on the site for randomness...

I know it has flaws, but it's still accepted on main :/

Anonymous

1. it cannot produce all the values in the range
2. it is not even close to evenly weighted

Anonymous

@Geobits It's acceptable, but it's not really random :P

Geobits

Soo.... not an error then :P

Anonymous

6:37 PM

Where do you see an error?

Geobits

In your edit history. I wouldn't have said anything about a silly warning :P

TimmyD

@Mego "Really" random in computer-speak really narrows options

Anonymous

@Geobits Doth thou impune mine honour?

Anonymous

@TimmyD MT is sufficiently random - all values are equally likely

Cᴏɴᴏʀ O'Bʀɪᴇɴ

In TrulyRandomGolfScript, this challenge is 0 bytes :P

Geobits

6:39 PM

@Mego Nay, only that of thy mother. gloveslap

Anonymous

@Geobits :O We duel at dawn!

Cᴏɴᴏʀ O'Bʀɪᴇɴ

O:

TimmyD

@Mego Is that UTC or ?

Anonymous

@TimmyD True randomness isn't hard. Just set up a radiation detector next to a sample of cesium-133 and count the radiation. Everyone has some lying around, right?

Anonymous

@TimmyD Doth thou impune mine honour, by suggesting I might live by anything but the great UTC?

Geobits

6:43 PM

Hmm. There's been a light ammonia smell here all morning and I'm starting to get lightheaded. Maybe I should see what's going on...

Anonymous

@Geobits Probably a spill. Clean it up with bleach, and everything will be fine.

quartata

Hrmph. I thought i<seq><num> converted <num> to the base defined by <seq>, but it actually just converts all the elements of <seq> to base <num>

TimmyD

@Mego Get out of my head. >.>

Anonymous

(and then I won't have to duel you later)

Geobits

@Mego >_>

quartata

6:44 PM

@Geobits uh oh

Geobits

It's weird though. No cleaning or anything going on. Just smells like it.

Roujo

IIRC, ammonia really isn't a nice thing to breathe =/

Anonymous

@Geobits Anybody fertilizing plants, or fermenting stuff, or running a diesel engine?

Roujo

Is it an old building?

TimmyD

Maybe you have cats.

Anonymous

6:49 PM

Or maybe an ancient refrigerator?

Anonymous

It's ok, you can tell us about your moonshine operation

Anonymous

Cooking meth?

Anonymous

Woodworking?

Roujo

The Internet seems to think your kidneys are failing. =P

TimmyD

@Roujo R.I.P. Geobits

Geobits

6:51 PM

@Mego nope @Roujo nope @TimmyD nope @Mego nope nope nope nope @Roujo webmd probably suggests cancer, too @TimmyD thanks, your RIP is appreciated

Is that everything?

Anonymous

You owe us some moonshine I think

TimmyD

Golfing chat responses ... interesting.

New Main Posts

1

Q: Sliding Capitals

The Background Imagine the English alphabet written out in a row in capital letters -- ABCDEFGHIJKLMNOPQRSTUVWXYZ. Suppose we have a special variable-width lens such that, when placed over the row, it shows a certain "window" of the alphabet, with letters outside the lens hidden from view. Addit...

code-golf string subsequence

El'endia Starman

@somebody I'll make a URL shortener akin to goo.gl or bit.ly instead. But your idea of dropping defaults is good.

Transcript for