The Nineteenth Byte

New Main Posts

12:06

0

Q: Biplex: an important useless operator

You may choose to use any base for input and output (including binary and unary), provided they are both in the same base. Input A list of between 1 and 255 positive integers (inclusive), each in the range 1 to 232 - 1 (inclusive). Input without leading zeroes is required to be accepted. Input...

Sp3000

@MartinBüttner Are you trying the quine challenge?

Martin Büttner

@Sp3000 Was going to do a simple CJam solution but had to head out for lunch. Since there still isn't one, I might try now.

but first biplex

Sp3000

Tell me how you go and I'll compare :P

... or not

Martin Büttner

okay...

now...

trichoplax

@MartinBüttner I thought you did that days ago :P

Martin Büttner

12:11

yeah I know, but I had to post it :P

trichoplax

lol

Doorknob

@AlexA. yes

Martin Büttner

@Sp3000 first pass is 28

Sp3000

Hm... I've got 30, but trying to get rid of an expensive bit in the middle

Martin Büttner

you know there is actually a pending feature request for making ArrayList * work with negative numbers and floats which would make this a breeze :D

Sp3000

12:15

:P

Martin Büttner

@aditsu hint

@Sp3000 do you mind if I post mine?

Sp3000

Go for it

Martin Büttner

oh wait, 10 %

Sp3000

Ahaha, yeah I dunno why that rule is there... (I have 29 now)

Okay yours is... nowhere like mine :P Might post mine after a bit

Martin Büttner

interesting

Sp3000

12:20

... actually no it is like mine but you're using a block

And I think that's a lot shorter

Martin Büttner

you did a string quine? interesting :)

Sp3000

.... string is expensive :/

Here's me redoing with block: {`"_~"+rd_z25*i,\g@%f=}_~

(feel free to take)

Actually... is this hanging on 0?

Oh, I can't use 0g% :/

nvm

Oh that's why you have 1|, riiight

Actually, float , works doesn't it? Maybe {`"_~"+rd_z26*,\g1|@%f=}_~ then?

Martin Büttner

the , and f=is pretty clever

mine can't use floats because of <

feel free to post it yourself, I think it's sufficiently different.

it definitely wouldn't have occurred to me

Sp3000

1| wouldn't have occured to me :P dibs on collab answer

Martin Büttner

eh, I'm sure 1e| would have occurred to you and leaving out the e isn't too much of a leap ;)

Sp3000

12:32

Oi :P

anOKsquirrel

What page do you guys use for cjam reference? I couldn't find one on the sourceforge page

Martin Büttner

there's sourceforge.net/p/cjam/wiki/Operators and sourceforge.net/p/cjam/wiki/Variables

and Sp wrote some inofficial documentation

Sp3000

^^ some unofficial documentation

anOKsquirrel

Oh, I had readthedocs page open

Sp3000

aditsu's been going through and writing more thorough docs lately, hence some actual links on the operators page now

anOKsquirrel

12:37

And I still asked :P

Sp3000

To be fair, I never finished the readthedocs one :P

anOKsquirrel

Going to look at the other one, didn't see anything on the b operator

Sp3000

(I still have most of the next tutorial written, but I just never got around to fixing it due to small quirks which I got wrong myself)

Always feel free to ask in chat :P

anOKsquirrel

Nope, still just says "base conversion"

Sp3000

17 5 b pushes [3 2] since 17 is 32 in base 5

anOKsquirrel

12:39

how do I use the b operator?

Sp3000

And [3 2] 5 b, well, pushes 17

anOKsquirrel

O okay, thanks

SuperJedi224

Hey guys

anOKsquirrel

hello!

So how would I use that to convert a binary string input to an array?

Sp3000

Array of... 1s and 0s?

anOKsquirrel

12:42

yes

Sp3000

:~ to eval each element

anOKsquirrel

Oh, okay thanks

Sp3000

Are you doing the invert a binary string challenge?

Martin Büttner

@Sp3000 cheeky.

anOKsquirrel

Nope

I'm doing codegolf.stackexchange.com/questions/62713/…

trichoplax

12:44

Woo!

Sp3000

Ah, right :)

@MartinBüttner :D

anOKsquirrel

hey @trichoplax

I can't comment (not 50 rep D:) so I have a question about the Biplex challenge

trichoplax

Go for it (hopefully you'll have the rep once you post...)

anOKsquirrel

Does the input need to be an array like in martin's answer, or can it just be space-seperated?

trichoplax

Any reasonable input format is fine (as long as it isn't precalculated in any way)

anOKsquirrel

12:47

Thanks

I have to go eat, bye

trichoplax

So space separated, newline separated, comma separated...

Bye :)

SuperJedi224

@anOKsquirrel Just upvoted your answer

anOKsquirrel

thanks!

mınxomaτ

Someone should do a browser extension that disables all comments on all news sites.

anOKsquirrel

I like reading them

...sometimes

trichoplax

12:55

Sometimes the comments are more informative than the articles

2

In amongst all the pointless ranting

mınxomaτ

@trichoplax If that's the case you should switch news sites.

SuperJedi224

@mınxomaτ That's going to happen no matter what news site you read

trichoplax

@mınxomaτ Depends on the subject matter. For topics with sparse coverage the comments can be the best source of accurate info

mınxomaτ

No it isn't.

(From my experience)

SuperJedi224

13:15

A desert temple

Buried almost entirely under the sand

anOKsquirrel

Oh, nice!

I have pocket edition though D:

SuperJedi224

Found it last night

anOKsquirrel

nice!

I need the PC version

If I do this right, I might beat martin on codegolf.stackexchange.com/questions/62713/…

SuperJedi224

Okay, I'm almost at the village

anOKsquirrel

cool!

SuperJedi224

13:18

Which would mark the furthest in this direction I've gone so far in this save

anOKsquirrel

nice!

SuperJedi224

And beyond the village is... still more desert

I think I see something off to the left

anOKsquirrel

nice

I want PC version :P

SuperJedi224

Well, I found a savana

Also, there's a building on the biome boundary I'd like to check out

I'll let you know what it is

anOKsquirrel

Cool :D

SuperJedi224

13:22

It's just a well

Martin Büttner

oooo, alephalpha used Hexagony :)

anOKsquirrel

for what question?

Darnit, I totally misinterpreted biplex

I lost a lot of time :P

But what I did do is write a binary XOR program

qS%{:~2b}%{V^:V}/];V

flawr

Pilot ejects from F A18 when arrestor cable snaps

►

Lembik

hi all

anOKsquirrel

wello

SuperJedi224

13:32

'Hoy

Lembik

I keep on feeling really proud my question has 39 answers and then unproud when I see how many some other questions have

anOKsquirrel

lol

SuperJedi224

I think this rock formation means that I'm almost at the west edge of the desert

anOKsquirrel

:D

SuperJedi224

My house is a short distance northeast of the east end

anOKsquirrel

13:41

Nice!

When you are playing PE with your friend...

Within 10 minutes we both found melons, pumpkins, cocoa, and more

And I still haven't found either

SuperJedi224

I have yet to find melons or cocoa.

Martin Büttner

@Rainbolt goo.gl/r7ljhp

SuperJedi224

I do have a large quantity of pumpkins though

anOKsquirrel

I made a farm with the 3 I found

I have like a stack or two?

Martin Büttner

@Rainbolt looks like the first wrapping happens on day 10

SuperJedi224

13:43

There's a little bit more desert on the other side, a bit to the north

Martin Büttner

there's a bug though, which doesn't move the O closer to home if it's North of home, let me fix that

SuperJedi224

Martin Büttner

@Rainbolt fixed: goo.gl/WXWKJr

@Rainbolt and here is a nicer version which just spits out all intermediate results up to N: goo.gl/fosKCS

anOKsquirrel

I have to go now, bye

SuperJedi224

Goodbye

Just found another desert temple and this one isn't almost entirely buried

flawr

13:49

Is this a minecraft landscape photography museum?

4

trichoplax

@anOKsquirrel Is the misunderstanding something I could clarify in the question to save anyone else hitting the same problem?

SuperJedi224

I think he left

trichoplax

Hopefully the ping will show up for later

feersum

@trichoplax I left a comment on your question

flawr

@trichoplax BLUE?

trichoplax

14:00

@flawr It's what everyone's wearing in here nowadays...

2

@flawr (Mine's only for Computer Graphics though - not here)

flawr

Not me=)

trichoplax

I just turned blue so I'm still clueless at the moment :)

flawr

Oh nice to see that CG is now realized too!

trichoplax

Yes I'm delighted too

flawr

Let's see, perhaps I'm going to hang out over there every now and then=)

trichoplax

14:05

You're very welcome. Chat is quiet so far but there are lots of questions needing answers and lots of interesting existing answers

SuperJedi224

Building a minecart track to go the full 2k+ blocks from one end of the desert to the other would probably be a waste of materials.

Well, bye for now.

Rainbolt

14:25

@SuperJedi224 You'd be better off build a portal at both ends. The walking/riding distance in the Nether would only be 250 blocks instead of 2000.

Wow I am really having trouble figuring out what room I am in now

I have to keep looking at the room description to be sure, because this room is suddenly all about Minecraft too

Beta Decay

Hmph those doctors aren't gentle when they fit the bionic limbs :P

Rainbolt

@trichoplax Why don't you test out your new powers by refreshing my avatar for the chat?

Not for my personal benefit of course

Beta Decay

Oh christ another diamond?!

This is just ridiculous :D

trichoplax

@Rainbolt That's very generous of you :P Now to figure out how...

Martin Büttner

@trichoplax never done it, but I think you can go to his chat profile, moderation tools, refresh

Beta Decay

14:37

Oh and congrats @tricho

You're the most successful turtle on the SE network ;)

trichoplax

@MartinBüttner Thanks - it worked!

Martin Büttner

@trichoplax indeed :)

trichoplax

@Rainbolt I hope you don't mind the side-effect of personal benefit. You're showing as an autumn tree now on my screen - hopefully on yours too...

Rainbolt

Oh dang, it is severely cut off lol

trichoplax

@BetaDecay Thanks :)

Rainbolt

14:41

Thanks @trichoplax

trichoplax

Yes it really puts the emphasis on the block rather than the tree...

Rainbolt

That's okay with me I guess

trichoplax

I assumed it was intentional - hopefully everyone else will too

Rainbolt

I'm less happy with the unbalanced whitespace

trichoplax

Maybe it would all fit in if you rotate it 45 degrees

SuperJedi224

14:43

@Rainbolt Clever Idea

SuperJedi224

15:01

So, start from my main nether-side portal, go 250 blocks west, and build another one?

Thomas Kwa

@quartata Now I'm wondering whether a one-byte truth machine is possible.

SuperJedi224

It would have to be a builtin, and that's a weird thing to have a builtin for.

Unless its one of those languages that's powered by a handful of weird builtins and not much else.

Thomas Kwa

It could be something like "output the register, and peek the stack; if stack top is truthy loop"

where input goes on both register and stack implicitly

but that does sound implausible

SuperJedi224

I'm currently trying to implement rainbolt's suggestion

But the terrain in the nether is making it hard

Really hard

Rainbolt

15:21

@SuperJedi224 I'm pretty sure that if you get a maxed Efficiency pick and a bucket, you can slice through the Nether like butter

I think you want to build both portals in the overworld first, and then connect them

If you spawn an overworld portal from the Nether it may end up in a really crappy place

VoteToClose

0

A: Quine multiple times

Vitsy, 32 Bytes Woo. My Physics teacher reminded me I had power functions to help me with this. Go figure. 'rVd3*V2^12/^DvV/1+(rvl1-*\[DO{] ' Start recording as a string - this grabs everything and pushes it to the stack as a string. r ...

Yus.

Vitsy is proving to be more useful than I originally anticipated.

Sp3000

Does the Vitsy answer work for negative float input? (e.g. -0.3)

SuperJedi224

@Rainbolt Okay

Goodbye for now guys

VoteToClose

15:37

Yes. Floor of (float*length).

Sp3000

k, just checking :P (too lazy to DL interpreter)

VoteToClose

It's all good. :D

Sp3000

Hmm 30. Expensive.

VoteToClose

Interestingly, if you don't put in input, it repeats it 39 times. '

Sp3000

What a weird choice of number

VoteToClose

15:40

Wait. Not 39. o-o

93.

New Main Posts

0

Q: Multiplying substrings

Write a program that takes two integers as an input; the first can be any integer and the second is less than or equal to the number of characters in the first number. Let these numbers be a and b respectively. The program will do the following Concatenate a minimal number of 1s to the end of ...

code-golf math number

trichoplax

@VoteToClose Is there a rational explanation?

VoteToClose

Yes - It's the ] character, which is the last string part recorded.

trichoplax

Ah...

Optimizer

wait, trichoplax is room owner now?

VoteToClose

15:43

He's just too fancy.

Optimizer

wait, he's a mod too ? ::O

Rainbolt

Are the test cases at the bottom of my sandbox post understandable? I made them horizontal instead of vertical to avoid adding 25 lines of length to my post.

VoteToClose

Yeah, for Computer Graphics.

Rainbolt

If nobody complains I'm going to go ahead and post it

VoteToClose

Looks good, @Rainbolt. :D

trichoplax

15:49

@Optimizer I'm not owner of this room, but I do have joint ownership of The Cornell Box

Optimizer

Do you know its showing a blue color with a diamond for you here too?

trichoplax

@Optimizer Yes - lots of people show blue here but they aren't all PPCG mods :)

Rainbolt

@VoteToClose Thanks for looking

Optimizer

@trichoplax like?

trichoplax

El'endia Starman is a mod but not a PPCG mod

Optimizer

15:51

he's a mod of at least one SE site

but you are saying you are just owner of a chat room, right?

anOKsquirrel

trichoplax yes

@trichoplax

Sorry I left :P

Sp3000

@VoteToClose Actually... does your answer work for 0? It looks like it might do 0/0...

trichoplax

@Optimizer Oh I see - no I've also just become a mod of Computer Graphics.SE.

Sp3000

(also I'm having trouble figuring why I'm only ahead by a few bytes despite having a builtin for abs o_O)

VoteToClose

@Sp3000 Ah - it does not. I'll add in a fix for that. Thanks!

Updated.

trichoplax

15:54

@anOKsquirrel I can't remember what that yes is an answer to. You can link answers to previous comments by pressing on the little arrow to the far right of the previous comment when you hover over it

Martin Büttner

@Optimizer room owners are shown in italics. blue is only for mods.

anOKsquirrel

Sorry.

trichoplax

@anOKsquirrel No that's fine - that was meant to sound helpful not accusatory :)

anOKsquirrel

I meant the question about space-seperated input on biplex

trichoplax

@anOKsquirrel I remember - I've edited the input section to say that the input format doesn't need to match the test cases. Is there anything else that would make it clearer?

anOKsquirrel

15:56

I don't think so.

trichoplax

Cool

VoteToClose

@Sp3000 Interestingly, it didn't throw an error - it just printed out one character and quit. O.o

anOKsquirrel

I have a new goal:

Use a new programming language every day

Sp3000

o_O

VoteToClose

round-off-sucks

Sp3000

15:58

@anOKsquirrel Awesome, let me help you get started :)

4

anOKsquirrel

@Sp3000 Wow, thanks! /s

New Main Posts

2

Q: The Traveling O

The world is a five by five array of cells. It wraps on all sides. It can be visualized like... XXXXX XXXXX XXOXX XXXXX XXXXX You are an O. You love to travel the world, and you do so according to the following rules (let C be the current day): On prime days, you feel nostalgic. Return to w...

code-golf

anOKsquirrel

I think I'll do python next.

Rainbolt

I love our unusual tagging system. Someone just added grid to my challenge

66 questions. ZERO followers.

2

New Meta Posts

0

Q: Programming in Minecraft (Redstone) - how to measure program size?

Since programs may be created in vanilla (un-modded) Minecraft using redstone to create logic gates (and more), someone could create such a program for a challenge on this site. How would such an entry be scored? Some possible scoring methods: Blocks used (placed redstone counts as a block) R...

discussion scoring

Martin Büttner

16:06

@Rainbolt Do people use the follow feature?

Rainbolt

I do. I follow code-golf and koth challenges

I ignore performance challenges because I know I can't compete or don't want to

Well, I used to follow koth anyway

I guess I removed it

Martin Büttner

@Sp3000 I like how you keep projecting your own desire to master the language onto others because you're not quite confident you want to embark on this mad task. :P

quartata

Alright I think the truth machine catalog is ready

Martin Büttner

(At least that's my amateurish psychological judgement of the situation. :P)

Sp3000

It's only my favourite language to not learn

quartata

16:07

@MartinBüttner I wasn't planning on calling it a catalog in the title. It was just there in the Sandbox so people would know

Martin Büttner

@quartata I just remembered you pinged me about that last night... let me have another look.

trichoplax

Maybe someone should post a challenge based on it and trick lots of unsuspecting users into learning it

Martin Büttner

@Sp3000 I was going to write an answer in it for "random 0 or 1", but then I tried.

quartata

Does my spec have the depth, o Sweet Genius?

Rainbolt

I follow mtg and chess on board and card games, java on stackoverflow, etc. I use it to filter stuff I want to see

Sp3000

16:08

Ah, I admire your attempt :)

VoteToClose

stackoverflow.com/questions/tagged/fish-esolang

This was all because of me. XD

Rainbolt

This site has two kinds of tags. The kind people might filter by, and then the kind of tags that exist purely because people like to categorize things. It must make people feel better.

VoteToClose

Back when I was new to the world of Code Golf...

Martin Büttner

@Rainbolt I do use tags as helpful search filters.

VoteToClose

Rainbolt

16:10

@MartinBüttner That's true. I keep forgetting about that

Martin Büttner

@quartata Unfortunately, "Truth Machine" is a few characters short. I guess "Implement a Truth Machine" would do nicely.

VoteToClose

Whoops.

Martin Büttner

@quartata Made one nitpicky change. Otherwise it looks good to me.

The sandbox user is close to having more gold badges on meta than I. :D

@Rainbolt codegolf.stackexchange.com/questions/62728/… very good question... I didn't even consider wrapping for determining distance and direction for odd numbers. was that your intention?

Rainbolt

Wow super ninja

I didn't consider it either, but the way it's worded, it matters

mbomb007

16:25

@VoteToClose I think this simulator would probably do fine for most programs.

Martin Büttner

@Rainbolt since there is no answer yet, you can still clarify that you meant that wrapping should not be considered.

but if you don't want to do that I can fix up the code I guess.

Sp3000

Man, I should be sleeping but mbomb's question has got me doing a lot of writing up/research

mbomb007

@VoteToClose I'm pretty sure there's one out there with pistons, too, though.

Martin Büttner

@Sp3000 which one?

Rainbolt

@MartinBüttner I edited to favor North and West over South and East. Then I realized that invalidates all of the test cases I pulled from your reference implementation, so I just said to ignore wrapping

Sp3000

16:28

The Minecraft scoring one

Martin Büttner

oh right

VoteToClose

@mbomb007 I'll look for it. ~~I got a lot on my plate~~ I'm very lazy, but I'm pretty sure I've seen one too.

Martin Büttner

@Rainbolt your latest edit isn't correct

you can move south on odd days, just after wrapping

(and the reference implementation does that)

Rainbolt

How do you move south on odd days?

trichoplax

"Spec: see Martin's answer"

Rainbolt

16:36

I'm flustered that the post has 12 upvotes within minutes of being posted and is wrong despite being sandboxed for four days :(

Martin Büttner

@Rainbolt even day: move too far south, wrap to the top such that you're in rows 0 or 1. following odd day: moving closer to home means moving south.

Rainbolt

Oh, I see. I'll fix

Okay, I just removed a sentence.

VoteToClose

What's the fastest way to update a profile change here?

Rainbolt

Ask a mod

Otherwise, you have only one option: wait

VoteToClose

:c

Rainbolt

16:39

Crap I totally forgot to incorporate zombies before posting

trichoplax

@VoteToClose Did that work?

VoteToClose

@Rainbolt Too late now... :c

Martin Büttner

@trichoplax it did

VoteToClose

:D Yes.

Martin Büttner

@VoteToClose Is that some specific fractal or just an artwork?

trichoplax

16:40

@VoteToClose Yay! Thank Rainbolt for providing the chance to learn how to do that earlier today...

VoteToClose

It's a fractal - How it was generated, I don't know.

So... Artwork. :D

Rainbolt

Why do mods even have the power to refresh profiles lol

Seems like such a useless tool in the spirit of maintaining order and discipline

trichoplax

I assume it's a perk so mods can gain popularity before making unpopular decisions

VoteToClose

Rainbolt

@trichoplax You have a wonderful way of viewing the tools provided to you.

quartata

16:42

Perform this action again in sixty seconds what

trichoplax

When I've refreshed enough profiles I can do something drastic

quartata

Lemme post my answer dammit

New Main Posts

3

Q: Implement a Truth Machine

A truth machine (credits goes to dis guy for coming up with it) is a very simple program designed to demonstrate the I/O and control flow of a language. Here's what a truth machine does: Gets a number (either 0 or 1) from STDIN. If that number is 0, print out 0 and terminate. If that number is ...

code-golf

Rainbolt

Two answers within a minute of one another?

Oh, you are the question author. That makes sense

quartata

Two answers from other people too

Martin Büttner

16:44

@quartata Oh, one important thing you should definitely mention: does it have to be the characters 0 or 1 (character codes 48 and 49)? Because by default, things like unary representation and more importantly byte values would also be allowed.

quartata

@MartinBüttner uh oh the snippet isn't working

Martin Büttner

If you don't want that (which might make sense) you should probably mention that explicitly.

@quartata works fine for me

quartata

Huh

Oh wait I'm on a bad browser one second

Rainbolt

Works fine for me as well

quartata

I was using Midori apparently which has issues with Stack Snippets

@MartinBüttner Hmm. I think I'm OK with that.

Rainbolt

16:47

Seriously? Nobody said anything about this?
- On even days, you feel adventurous. Move C / 2 steps south.
- On square days, you feel adventurous. Move as far east as possible.

VoteToClose

everyone scrams to go do the Truth Machine

Martin Büttner

@quartata Really? I can understand byte values, but unary seems weird because it means input can be empty or 1 and output would be empty or a stream of 1s

VoteToClose

o-o I assume people disregarded it.

quartata

@MartinBüttner Oh....

Huh

Lemme change that.

Martin Büttner

sorry for not spotting that earlier

trichoplax

16:49

@Rainbolt Was that not deliberate?

Rainbolt

No. You feel adventurous on two different days :-/

Martin Büttner

that can't be right! :D

quartata

Is that better?

Oh boy, the answers are rolling in

Martin Büttner

oh, now you've disallowed byte values as well.

I guess that's fine.

quartata

@MartinBüttner Brainfuck users will cry

Uh

0

A: Implement a Truth Machine

Microscript, 3 bytes i{p (Filler text here)

I already posted this...

What should I do?

0

A: Implement a Truth Machine

Microscript, 3 bytes i{p The shortest one I know.

Martin Büttner

16:52

@quartata I'm sure there must be a BF implementation that reads/writes numeric input.

@quartata Nothing now, but in the future, leave a comment. ;)

quartata

@MartinBüttner NumberFuck!

Also, any better tags for this?

I couldn't think of any...

I wonder if a deadfish one is possible

Beta Decay

@Rainbolt Is that the Mi Yodeya tree?

TimmyD

@quartata Should we have a catalog tag?

VoteToClose

I more than halved my Vitsy answer. :D

Rainbolt

@BetaDecay Oh crap if it is I need to find another tree. I Googled "Autumn tree" and picked the first one that looked like it would cut and paste well. I definitely don't want to offend a bunch of people

Beta Decay

16:59

@Rainbolt Haha I have no idea

Rainbolt

Nah, this is the Mi Yodeya tree: cdn.sstatic.net/judaism/img/…

New Main Posts

0

Q: Who's that probability distribution?

Introduction In this challenge, you are given a list of nonnegative floating point numbers drawn independently from some probability distribution. Your task is to infer that distribution from the numbers. To make the challenge feasible, you only have five distributions to choose from. U, the u...

code-challenge probability-theory classification

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