The Nineteenth Byte

orlp

1:36 AM

@kirbyfan64sos I posted a question on yours :)

Chris Jester-Young

2:04 AM

1

A: Share answer/comment URL is genius. How does it work?

/q/$postid[/$userid] and /a/$postid[/$userid] are actual routes in our system, with an actual controller action attached (both of those routes go to the same action—questions and answers both live in the Posts table, just with different PostTypeIds). Depending on whether the post is a question o...

@ProgramFOX ^ Special for you.

orlp

shortest way to get [1, 1] in Pyth?

shorter than ,1 1 pl0x

jT9

I'm a god

Doorknob

0

A: Lookalike shapes

Snowman 1.0.2, 61 chars }vgvgaC"[0-9]+"sM:10sB;aM2aG:AsO:nD;aF;aM0AAgaA*|:#eQ;AsItSsP Pure gibberish (unless you happen to know Snowman), a.k.a. exactly in line with the language's design goal of being as confusing as possible. Input format is same as in the post, output format is also the sa...

I'm particularly proud of this Snowman answer :D

Dennis

2:30 AM

@ChrisJester-Young I'm hardly an expert when it comes to FPA. Is it possible that a / b != c /d when a * d == b * c and all four numbers can be represented exactly?

Chris Jester-Young

@Dennis Even if a, b, c, d can all be exact, a / b and c / d are not necessarily exact.

I'm not an FP expert either, so it's hard for me to construct a counterexample.

But, let's say b == 3 and d == 5, and see where we can run with this.

So for the a * d == b * c to hold, I guess we can make a == 3 and c == 5.

Hmm, that's just 3 / 3 == 5 / 5. I guess that's true.

PhiNotPi

@Calvin'sHobbies The card-in-sleeve was a suggestion of Martin.

Dennis

What about a := 1, b := 3? Then c == n * a, d == n * b for some n. I guess I could try by brute force if that fails for some n.

Chris Jester-Young

There's gotta be a better way than brute force, but I don't know a way.

orlp

2:57 AM

@isaacg .[R doesn't work

Dennis

3:18 AM

@Doorknob At least it's not reverse indentation. :P

Dennis

4:42 AM

Hm, I wonder if you can make an avatar transparent.

New Main Posts

4:56 AM

-1

Q: iam using net beans glassfish server wat to do this error

i'am using net beans Glass fish server what to do this error glass Fish Server 4.1, deploy, null, false BUILD FAILED (total time: 1 second)

Dennis

@NewMainPosts You are incredibly slow today.

Safe! \o/

4

A: The Programming Language Quiz

Wake, 17 bytes ":"Hello, World!" According to the offial website, Wake is a programming language which has the essences of Makefile, regular expressions, and pattern matches of functional programming languages. Wake was created by shinh and can be tested on his golf server Anarchy Golf. ...

New Main Posts

7:07 AM

0

Q: Solve a traffic intersection

The task Write a program or function that takes a traffic intersection structure and outputs the sequence, in which vehicles will pass. The input can have any structure you like, the only requirement it must be human readable (so please do not use any bitmasks, arrays of numbers which say nothi...

code-golf

New Meta Posts

0

Q: What is the way linebreaks and formatting is counted for lowest bytes challanges?

The title pretty much says it. if I use tabs/spaces for making the code more readable do I have to count them? and are linebreaks counted as 1 cahracter(\n) or as 2(\r\n)?

discussion

Mauris

8:03 AM

Some people on twitter are golfing the new Google logo in SVG.

jrenk

@Mauris I love this logo <3

Fatalize

@Dennis new avatar threw me off so much

Beta Decay

Hey what do you think about creating a new tag for "Hello, World!", Is this Number a Prime? and 1, 2, Fizz, 4, Buzz?

That's probably the most that there'll be, but it would be a good reference point

Mauris

hello-world is a thingy

Not sure about the others

Beta Decay

I mean like lang-ref or something

Fatalize

8:15 AM

classic-challenge

Martin Büttner

8:26 AM

@BetaDecay I'm not sure how these challenges are actually substantially different from a normal code golf. And just a tag "standard programming task golf" sounds like a meta tag where we'd just get a lot of debate and/or rollback wars about other challenges

Beta Decay

@MartinBüttner Right, I see :)

isaacg

10:14 AM

@orlp Fixed

Optimizer

10:54 AM

@Doorknob Sure. Optimizer is the main account.

New Main Posts

12:26 PM

0

Q: Decrypt Brainfuck

I wanna say Sorry in advice, because this is my first Code Golf (Correct me in comments): My Code Golf is for you to decrypt this Brainfuck Code (3 times) with the shortest Programm possible in any Language: [-]>[-]++++[-<++++++++>]<>>[-]>[-]++++++++++[-<++++++++++>]<---<<>>------.<<+++++++++++++.

code-golf code-challenge brainfuck

New Meta Posts

12:44 PM

0

Q: How is system specific or undefined behaving code treat, if not explicite stated?

I'm asking this especially after I stumbled on this question my self when I got asked some minutes ago in a comment, if the include in my C code is really neccessary. I answered that it is, since I need printf which would be implicite declared if I wouldn't include the stdio.h what results in un...

discussion

New Main Posts

12:54 PM

0

Q: Cardinals and ordinals, 1 to 100

Here's a simple one to stretch your compression muscles. Your code (a complete program) must output the spelled-out English representation of all the cardinal numbers from 1 to 100, and then all the ordinal numbers from 1 to 100. The numerals in each list should be delimited by commas and spaces ...

code-golf number kolmogorov-complexity

jrenk

2:06 PM

If a question has the "kolmogorov-complexity" tag and the outpout should be for example "abcdefg" and my code just echo's this string hardcoded, does this violate any rules?

Dennis

It doesn't.

Unless the string is actually abcdefg or something similarly ungolfable, it's a rather boring answer though.

Relevant meta discussions:

8

Q: Should answers to fixed-output challenges be written in a programming language?

We have a definition of what we consider a valid programming language for answers on PPCG. (If you disagree with this definition, please do so on that other post, and not here.) The one type of challenge where people regularly tend to ignore this is for challenges with fixed output, i.e. mostly ...

discussion policy answers

jrenk

@Dennis Thank you!

Dennis

81

A: Loopholes that are forbidden by default

Hard-coding the output Unless the question is an obvious exception (the primary exception being those tagged kolmogorov-complexity), your program is expected to do work, not just print a pre-calculated result. If the question doesn't require input and so a solution which just prints the answer w...

Note that the loophole explicitly excludes kolmogorov-complexity.

jrenk

@Dennis thanks! I guess that's okay because a hardcoded output will probably never win a kolmogorov-complexity / code-golf challenge

Dennis

I'd argue that all output in kolmogorov-complexity is hardcoded. ;)

jrenk

2:20 PM

I could post my 2451 byte solution to codegolf.stackexchange.com/questions/57053/… though

;)

Dennis

And yes, the echo ... solution is rarely the shortest. Look here for a long list of counterexamples:

94

Q: "Hello, World!"

So... uh... this is a bit embarrassing. But we don't have a plain "Hello, World!" challenge yet (despite having 35 variants tagged with hello-world, and counting). While this is not the most interesting code golf in the common languages, finding the shortest solution in certain esolangs can be a ...

code-golf string kolmogorov-complexity hello-world

@jrenk That's technically allowed (especially if it is the shortest solution in your language), but I'm not a big fan. Once somebody posts a low-effort answer, they start to pile on.

isaacg

For my recent count the trees challenge:

11

Q: Count the trees

A tree is a connected, undirected graph with no cycles. Your task is to count how many distinct trees there are with a given number of vertices. Two trees are considered distinct if they are not isomorphic. Two graphs are isomorphic if their respective vertices can be paired up in such a way tha...

code-golf combinatorics sequence graphs

I've got a solution in Pyth that is both significantly shorter than the current only answer

and actually generates trees and checks for isomorphicness

would it be appropriate to post it?

If not yet, when?

jrenk

@Dennis That's why I asked. But I will not post this answer because it's no fun at all...

Peter Taylor

@isaacg Yes, I don't see people rushing to answer that question.

Geobits

Bad news guys, we won't be graduating in November after all. Because the world is going to end on Sep 24th.

This article is shockingly absurd.

Peter Taylor

2:27 PM

I'm impressed that checking isomorphism is so golfable: I hadn't even seriously thought about how to golf it, because I expected it to be too ugly.

Dennis

@isaacg I've been there a few times. Consensus seems to be that winning your own challenge is perfectly acceptable. Personally, I'd wait at least a week to give others a chance to find a similar solution.

jrenk

@Geobits Someday I can tell my children ... I survived the apocalypse ... three times

isaacg

OK, I asked because it's only been a couple of days

@PeterTaylor The isomorphism checking routine is essentially just doing all possible vertex label -> vertex label transformations.

Martin Büttner

@isaacg I've currently got the same problem. my BF to MarioLANG conversion challenge has only one submission, and according to the author, it's not even correct

Dennis

@Geobits You know, I actually believed you once and thought I'd lose most of my privileges. :P

isaacg

2:31 PM

Well, at least my questions only submission works

Beta Decay

I really hate it when people have this kind of attitude

isaacg

Soo it's not as bad as it could be

Geobits

@Dennis Well, either the world will end or we'll master stargates. He seems a bit confused on that point:

> In this way, CERN is being used as a stargate so that human scientists will be able to go to and from currently unknown, perhaps very hostile, non-physical worlds and dimensions located and currently unseen, outside our physical universe.

Martin Büttner

@isaacg at least your only submission was written by Peter ;)

isaacg

Exactly.

Fatalize

2:34 PM

I visited CERN and I didn't get to see a Stargate :(

Dennis

@MartinBüttner Right, that one's still on my to do list. It's what you get for posting "normal" challenges while the PLQ and HW are still going. :P

Geobits

Yea, the PR tour doesn't show you the stargates.

Martin Büttner

@Dennis :D I'm glad it is on your to do list ;)

I'm considering trying Retina

ProgramFOX

2:54 PM

@ChrisJester-Young Nice, thanks!

trichoplax

@BetaDecay I think the reception such posts get is welcoming enough that anyone not actively looking to be offended can learn from it and go on to post well received challenges later.

Beta Decay

@trichoplax Yeah I agree. At least s/he knows about the Sandbox now

Geobits

Chat spawned a question:

0

Q: What's the worst that could happen to CERN?

It's been said many times that CERN is going to destroy the Universe and everybody in it, but most educated people know that this absolute hocum. It seems being the biggest supercollider therefore increases the chances that it's going to break by a near infinite margin. However, if something wer...

science-based apocalypse

Beta Decay

:D

Do you frequent Worldbuilding or were you looking for CERN stuff?

trichoplax

@BetaDecay Yes maybe they will go on to post good questions later - sometimes such attitudes are just short term due to the perception of being attacked. It might pass once they see how other questions are treated in general

Geobits

3:09 PM

I peruse... and offer comments now and then: worldbuilding.stackexchange.com/questions/23982/…

Beta Decay

I see. I use it as a place to ask any random question which comes into my heaf

Rainbolt

I don't have a heaf. I should get one

Beta Decay

You have to replace the filters regularly which gets annoying

Geobits

That's one of the problems I see with that site. It's so broad in scope that almost any random idea can be squeezed into "on topic-ish".

Beta Decay

worldbuilding.stackexchange.com/users/24/…

Rainbolt

3:12 PM

I have a world in which a demon created this really hard math problem and said "If you fail to solve my really hard math problem, I will destroy your world!" How would my citizens go about solving it?

Geobits

^ By writing the shortest code possible

Rainbolt

You guys don't even know, but I won the class competition for best Wolf

Homework problems are on topic everywhere. It's all about how good your English is

Beta Decay

:D

Rainbolt

Calvin is basically teaching his class at this point

Then we have guys like Dennis who are probably professors who enjoy solving puzzles as a pasttime. They have no clue that they are doing all of the homework

Beta Decay

Haha all you need to do is buy a CS book and copy all of the example questions, asking for the shortest code

Geobits

3:16 PM

~~copy~~ rewrite

Beta Decay

If only my automatic plagiarism challenge had got off the ground ;)

isaacg

@Rainbolt Take everyone who's good at mathematics, and put them all together in a small number of university-like environments, and have them work on it together. Give them lots of computing and stuff.

Geobits

^ That's far too ~~sensical~~ boring for a Worldbuilding answer, though.

Martin Büttner

hmmm, I really want to write HW in Monkeys, but in addition to being a really hard-to-program-in language, the reference implementation seems to contradict the spec in several ways :/

Beta Decay

Hahahahha this is awesome

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