The Nineteenth Byte

LegionMammal978

16:05

> I'm still [on hold!] [on hold]

Dennis

@Riker Unlike our usual rules, feel free to use a language (or language version) even if it's newer than this challenge. If anyone wants to abuse this by creating a language where the empty program performs a primality test, then congrats for paving the way for a very boring answer. — Dennis ♦ 1 min ago

Wait, you're Wheat Wizard?

Luis Mendo

16:26

People should at least give some clue when they change their name...

Erik the Outgolfer

@Dennis Let's make an effort to keep something called "reading the rules of a challenge before commenting on others' answers" up.

CartManager XD

@Dennis that's good. I am

Mr. Xcoder

Do you think this is a dupe: code-golf - given a string, copy the input to the clipboard?

Luis Mendo

Not that I know of, but closely related to this

83

Q: I copied my password to the clipboard! Can you delete it?

Following the best security practices, I keep a plain text file with my passwords on my hard drive. In fact, I just copied and pasted one of them to access my PPCG account. In a lucid moment, I decide that the password should better not remain in the clipboard after its use. Since this happens t...

code-golf

Erik the Outgolfer

A search for clipboard is:q closed:0 doesn't give any results that might be dupes.

Mr. Xcoder

16:33

Great! Maybe I'll post it in the sandbox in about a week :))

trichoplax

Or post a rough outline in the sandbox now and look at the comments after a week...

Mr. Xcoder

However @LuisMendo it is too closely related... No it's not a good idea

Luis Mendo

I agree. Maybe add some variation to make if more different

Dennis

@EriktheOutgolfer To be fair, overriding standard loopholes is quite rare.

Mr. Xcoder

@LuisMendo maybe something related to restricted source or sth else

Luis Mendo

16:36

Or just paste from clipboard instead of copy into it

Mr. Xcoder

@CartManagerXD :(( I used to like that profile pic. That was pure Brain-Flak

Erik the Outgolfer

That profile pic is still on GH AFAIK :))

Mr. Xcoder

@EriktheOutgolfer yeah, found it on Information Security

CartManager XD

Is there any way to retract a delete vote?

Dennis

I don't think so.

Mr. Xcoder

16:39

I doubt so

Well, that's a good idea for a feature-request on meta.SE

Erik the Outgolfer

@Dennis Well, I'm used to reading the challenge rules closely paying attention before voting to delete, commenting on, downvoting answers based on a false premise. Am I unique as a non-robo-*-voter?

Dennis

Everyone makes mistakes, no matter how closely they pay attention. Errare humanum est.

Mr. Xcoder

Someone likes Latin @Dennis

Erik the Outgolfer

@Dennis OFC, but what I meant is that I think I might have a different method of voting. Also, I think I'm less going-with-the-crowd than others (although I'm not bragging anything here).

Mr. Xcoder

@EriktheOutgolfer No, you're not the only one.

Erik the Outgolfer

16:44

Also, Latin quotes may make you sound more sophisticated than intended.

CartManager XD

So are we disregarding that loophole for all answers? or just answers on that particular question.

Erik the Outgolfer

That particular question, because the rules override it.

CartManager XD

Is that because it is a catalog?

Erik the Outgolfer

Usually catalogs override that particular loophole, although I'm not sure if it's the same for all catalogs.

I think there's no consensus on that, so if this is the case, then no, overriding must be explicit.

CartManager XD

Man our loopholes really suck. They are all antiquated and a good deal of them are useless and some of them are even directly harmful.

Erik the Outgolfer

16:53

Well, if you believe that overriding a loophole in a specific case should be implied, make a discussion meta post. Just be sure to be clear (I can't find a dupe). :)

DJMcMayhem

17:03

CMC: determine if N has exactly one prime factor. N will always be a positive integer

Truthy: 2, 3, 4, 5, 7, 8, 9, 11, 13, 16, 17, 19

CartManager XD

Does anyone know how the review all time stats are ordered? I have been trying to figure it out for a while but it remains illusive.

DJMcMayhem

Falsy: 1, 6, 10, 12, 14, 15, 18, 20

Erik the Outgolfer

@DJMcMayhem Pyth, 2 bytes: P_.

!!SuperPrime, 0 bytes: .

@DJMcMayhem VTC: Dupe: Is this number a prime?

CartManager XD

Its not a dupe

16 is not prime but its only prime factor is 2

DJMcMayhem

^

Erik the Outgolfer

17:07

It has 4 prime factors: 2 2 2 2.

DJMcMayhem

.... Are you just being overly pedantic for the fun of it? It has one unique prime factor

Erik the Outgolfer

It should instead say if it has exactly one unique prime factor.

CartManager XD

No it only has one prime factor

Erik the Outgolfer

Well, prime factor can be defined as many things. Fixing CMC:

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

May the 4th be with you! code-golfkolmogorov-complexityascii-art Note: This is a Star Wars Day challenge and, if posted, will only be posted on May 4th Happy Star Wars Day everyone! And because this is a code-golf site, we must tell the story of the incredible resistance of Martin Ender. The st...

Erik the Outgolfer

17:09

CMC: determine if N has exactly one unique prime factor. N will always be a positive integer

Jelly, 2 bytes: Æv.

CartManager XD

I don't think the word unique adds anything

Jan Dvorak

It's not recommended to answer your own challenges outright ;-)

Erik the Outgolfer

It's not my own challenge, it's DJMcMayhem's challenge clarified.

Jan Dvorak

@CartManagerXD 25 has the factor 5 present twice

CartManager XD

but it only has one prime factor

Jan Dvorak

17:12

It has two. 5 and 5.

CartManager XD

No you've counted 5 twice

Erik the Outgolfer

Apparently.

So the challenge was unclear and I clarified it.

Kritixi Lithos

@JanDvorak In octave, factor(25) gives 5 5

CartManager XD

I'm my opinion the challenge was perfectly clear to begin with

Erik the Outgolfer

The fact that there's a dispute means that the challenge was unclear.

Jan Dvorak

17:14

Yeah - then you started refactoring it

CartManager XD

the set of all prime factors of 25 has only one element thus it only has one prime factor

Jan Dvorak

The challenge is clear. CartManager's proposed version is less clear.

@CartManagerXD it's a multiset, not a set.

CartManager XD

That seems like a completely unjustified leap

Jan Dvorak

It's not a leap. It's a possible interpretation of your proposed version of the challenge, and quite justified IMO.

CartManager XD

We are all clear on what the challenge wants and this is turning into an argument. I'd rather not go on.

Kritixi Lithos

17:19

@DJMcMayhem Octave, 36 bytes: @(x)x>1&length(unique(factor(x)))==1

DJMcMayhem

@JanDvorak No, Erik did

Kritixi Lithos

@KritixiLithos Can save 1 byte by using <2 instead of ==1

DJMcMayhem

17:39

Is there a word that means negative of a prime? I know that negative integers aren't prime or composite by definition, but I'm curious if there's a negative equivalent for primality

Even better, is there a word that defines the set of all primes and their negatives? Like {2, -2, 3, -3, 5, ...}

Erik the Outgolfer

Looks like a good question for ELU.SE.

Jan Dvorak

You could try "prime integers".

more verbosely, "prime elements of the ring of integers"

` en.wikipedia.org/wiki/Prime_element

DJMcMayhem

Except that primes are positive integers by definition, so specifying integer doesn't help a lot

Maybe there just isn't a word

Jan Dvorak

"positive or negative primes"?

in the end you'll probably have to explain

Erik the Outgolfer

I don't think that helps either, there are no negative primes. Maybe you mean "primes or their negatives".

DJMcMayhem

17:48

Yeah

@EriktheOutgolfer That's exactly what I said

Jan Dvorak

positive or negative prime integers. Clear and pedant-friendly

CartManager XD

Numbers with an prime absolute value

Jan Dvorak

too contrived

Erik the Outgolfer

too ungolfed

Jan Dvorak

we need more golfing challenges for English

CartManager XD

17:50

{n:|n|in P}

Erik the Outgolfer

Is that a fork bomb or something?

CartManager XD

No its set builder notation

It reads the set of all n such that n is an element of the set of all primes

Erik the Outgolfer

Unfortunately that's not a word.

I think the shortest possible unambiguous phrase would be "primes' negatives".

CartManager XD

I don't think that is very unambiguous

That seems to imply {-2,-3,-5,-7,-11,...}

Erik the Outgolfer

Yeah, that's what it should imply, although a more unambiguous phrase would be "prime ns' negatives".

CartManager XD

17:54

Isn't the set we are trying to get {2, -2, 3, -3, 5, ...}?

Erik the Outgolfer

That's the second set we're trying to get. We're trying to get both I think.

For the other one, "ns that have prime abs-es" is one.

Jan Dvorak

too contrived, though

I mean, clumsy

Erik the Outgolfer

Oh, I found another one (although even more contrived): "ns having prime abs-es".

Jan Dvorak

flatMap(n->[-n,n])primes

Erik the Outgolfer

What language is this in?

DJMcMayhem

18:01

That's not much different than what cart manager said

Jan Dvorak

primes>>=n->[-n,n]

Erik the Outgolfer

In what language a>>=b is a shortcut for flatMap(b)a?

Kritixi Lithos

I'm guessing Ruby

Jan Dvorak

>>= is monadic composition, and lists are monads

wsbltc

@MartinEnder @Dennis I have a question in the sandbox that DJMcMayhem recommended that I check with you if it's ok. Can you check it out? Thanks.

New Main Posts

18:04

0

Q: 4 to 1 multiplexor on logic layer in logisim

I want to substitute a 4 to 1 multiplexor in logisim which should consist only out of logic gates. I already have the substitution but something does not work with the connection. I got a single wire which comes from the controller and which is a 2-bit wide bus. But when I want to "re-split" it ...

logic-gates logic

CartManager XD

^ That is not a question for SO and I don't know why people are VTCing it as such

Erik the Outgolfer

I haven't. Of course it isn't for SO.

Jan Dvorak

Most of the general programming questions aren't good for SO.

CartManager XD

That is not a general programming question

Jan Dvorak

true

but just adding objective winning criteria won't save it either

CartManager XD

18:13

I think with some explanation and an objective winning criterion it would be fine to be reopened

Erik the Outgolfer

I think it's discouraged for non-OP to add a winning criterion.

CartManager XD

However the OP is probably just looking for help and doesn't want to make a PPCG question

Jan Dvorak

Indeed

Downgoat

18:25

Question: can I golf something like: a >= 1 ? 1 : 0 with only min/max functions?

CartManager XD

a is an integer?

Downgoat

yes

CartManager XD

In that case max(0,min(a,1))

If a is a positive integer it is just min(1,a)

Downgoat

@CartManagerXD oh, yeah duh >_> I was using max, not sure what I was thinking

D: same byte counts

Kritixi Lithos

... unless you use a different language

Erik the Outgolfer

18:32

Yeah, in Jelly that is «1»0 as an indexed link or «1$0»$$ as an inline link.

DJMcMayhem

@Downgoat Sign?

Unless it might be negative. :shrug:

Erik the Outgolfer

If it's negative then it can be shortened to 0.

Kritixi Lithos

It's 0⌈1∘⌊ in Dyalog APL as a train (or a fork, I'm not sure what it's exactly called)

quartata

@DJMcMayhem presumably not necessarily an integer

Erik the Outgolfer

10 mins ago, by Downgoat

yes

CartManager XD

18:41

CMC: Similar to @Downgoat 's question make a function only out of min, max and number literals that performs ` a >= 1 ? 1 : 0 ` for the reals.

Kritixi Lithos

@CartManagerXD Dyalog APL, 5 bytes: 0⌈1∘⌊

New Main Posts

-3

Q: Hello... eh, who?

Introduction You started to write a "Hello, World!" program, but after you wrote the part to print the hello, you forgot what your program should actually print. So now, you somehow managed it to write a program which can check if the entered word is what you search. The task Your task is to w...

code-golf string restricted-source hello-world

Kritixi Lithos

Dyadic ⌈ is max while dyadic ⌊ is min

CartManager XD

@KritixiLithos Its not a code-golf

I also don't think this works

Kritixi Lithos

Why? It calculates min(1,right_arg) first, then does max(0,the_result)

CartManager XD

18:45

That won't work for .5

Kritixi Lithos

ah, real numbers

CartManager XD

It is impossible

Erik the Outgolfer

Again, using Jelly, an inline link would be <1$Ṇ$ while an indexed link would be <1Ṇ.

Dennis

@CartManagerXD So no ==, subtraction, etc.?

CartManager XD

19:02

@Dennis Yeah that was the intention. However it is impossible

A possibly possible version permits adding real numbers to things. e.g. min(a,0)+1 is allowed but min(a,0)+max(a,6) or max(a,9)+a are still disallowed

^ +1 imaginary points to anyone that can solve or prove impossible the above challenge

Jan Dvorak

Finally!

New Main Posts

0

Q: adder in logisim on logic layer only with 2-input-nand gates

I want to build an adder in logisim only with 2-input-NAND gates. The adder consists of 2 inputs (1 x constant 1 and 1 x arbitrary number) and an output. The first thing which came into my mind is a 8-bit full adder but maybe there is an easier solution for this (because of the constant 1). Has...

logic-gates logic

Jan Dvorak

min(n), max(n), n+ are all non-expanding maps on reals using their usual metric. Composition of non-expanding maps is a non-expanding map. The desired function is an expanding map.

You can also replace "non-expanding" with "continuous"

QED, twice.

the continuity argument also applies if you use two-argument min, max and addition

even if you also allow subtraction, multiplication and all sorts of other continuous functions.

CartManager XD

19:21

+1 imaginary points

Mendeleev

19:33

Please help defend the new PCG logo on pixelcanvas.io/@-44,35

Riker

I've fixed the C

user165474

Yay I have a power of 5 reputation :D

Riker

what 10 second limit? this is amazing

user165474

Someone's interfering with the background :(

Riker

do we have a template for the P?

CartManager XD

19:37

Its in the top corner of your browser isn't it?

Mendeleev

@Riker It gets smaller as you get closer to 0,0

@Riker Should be this:

Riker

?

user165474

P is corrected

Mendeleev

Riker

ah I see

Mendeleev

19:38

Also apparently they don't block Tor IP's ;)

Riker

I've noticed

:D

user165474

It won't let me place white tiles where they belong, but I can place them in the wrong spots if I want >_>

CartManager XD

Hey could I get some feedback/testcases for this challenge:

3

A: Sandbox for Proposed Challenges

The Image of the Dragon I saw a cool gif of the dragon curve made from a square, and thought what if we started from another base image. So I wrote a program to do this. It's so cool that I thought it would be fun to do it as a challenge. Task You wil...

Mendeleev

@HyperNeutrino Try refreshing, it doesn't let you overwrite a tile with one of the same color

user165474

Oh okay. Yeah, it started working again after refreshing; I think I had an old version (as in it may not have been updating on time)

Riker

19:41

that happens if you try to use both FF/chrome or similar

user165474

I see. I'm only using Chrome right now (well actually I left the page to go work on schoolwork like I should... xD)

Mendeleev

I think at one time I had 12 instances of Tor Browser going, 4 per screen

user165474

>_>

user165474

I have 3 activities with 4 desktops each

user165474

I could make a lot more of each and get about 100 different thingythings

user165474

19:42

Whatever they're called

user165474

Right, desktops.

CartManager XD

19:56

Ok I'm going to post my challenge now if no one has any objections

Riker

go for it

New Main Posts

0

Q: Hexagonal Triangles!

Your task: make a hexagonal triangle with side length n, where n is a positive whole number or 0. First, let me define a hexagon: / \ | | \ / (Amazing ASCII art, right?) Hexagons can be linked together by sharing sides: / \ / \ | | | \ / \ / / \ | | / \ / | | \ / A...

code-golf ascii-art geometry hexagonal-grid

ckjbgames

Hey there!

Riker

o/

ckjbgames

I just made a new sandbox post about Google autocomplete results.

gist.github.com/ckjbgames/f7bfa353e639f4a449fc57ab0a7befd3

0

A: Sandbox for Proposed Challenges

Google Autocomplete Fun code-golfinternetstring Your task is to create a program which, given an input string, will output the first Google autocomplete result for that search. The format of input/output is up to you. Rules Your program must take 1 input, a string, and output the top Goog...

Riker

20:10

looks good to me

Downgoat

._. why is libgit2 docs saying to link dylib for "static library instructions"

that is like oxymoron

Riker

lol

ckjbgames

@Riker Anything I could improve?

Riker

still thinking

ckjbgames

@Riker k

Riker

20:15

I'd recommend requiring them to check with you regarding which URL to use

otherwise that seems prone to abuse

"my short url is better, it's shorter and thus better"

ckjbgames

@Riker I did state that URL shorteners weren't allowed.

Riker

url shortener != shorter url

ckjbgames

But, I will add the whole bit about explicitly using 1 URL.

@Riker yeah

@Riker Thanks for clarifying!

Riker

np

New Sandboxed Posts

gosh darned autocorrect always getting in my way

ckjbgames

20:22

@ComradeSparklePony Hello

New Main Posts

4

Q: The Image of the Dragon

I saw a cool gif of the twin dragon curve made from a square, and wondered what would happen if we started from another base image. So I wrote a program to do this. It's so cool that I thought it would be fun to do it as a challenge. Task You will take...

code-golf graphical-output image-processing fractal

0

Q: Double Me A Quine

You are to make a program that will output its source code twice in a row with no delimiter. The only catch is that the output must also do the same thing and so on. For example, this problem is easily solved in HQ9+ with the following program: QQ QQ will output QQQQ which itself will output QQ...

code-golf quine

Downgoat

oh no, xcode is trying to compile every file including stuff in .git folder >_>

oh no what have I done

Christopher

20:39

Does anyone else like spicy food?

flawr

yep

Christopher

I am talking like Reaper hot

DO you ever feel like people just don't understand how great spicy foods are?

Why Do Some People Tolerate Spicy Food?

►

flawr

20:58

@Christopher For me still a lot of things are too hot, but I do still enjoy spicier things than most people I know.

Christopher

@flawr I have gone into the deep end. Flashbang hot sauce. Hottest in the world (afaik iirc). Nothing but hotsauce and a chip.

It was hot. And I didn't take milk or anything. 10/10 would do again

Pavel

alias yolo='git commit -am "DEAL WITH IT" && git push -f origin master'

mınxomaτ

→ 21 messages moved to Pxls Space

Pavel

Yay, just finished running some graphics benchmarks, my computer didn't crash with VIDEO_SCHEDULER_INTERNAL_ERROR for the first time in like ~6 months! I can play games now!

Christopher

Nice job!

Pavel

21:12

Thanks AMD for new drivers!

New Main Posts

1

Q: Google Autocomplete Fun

Your task is to create a program which, given an input string, will output the first Google autocomplete result for that search. The format of input/output is up to you. Rules Your program must take 1 input, a string, and output the top Google autocomplete/auto-fill suggestions result. The f...

code-golf string internet

New Main Posts

21:44

2

Q: Tips for golfing in SOGL

Do you have any code-golf tips for writing in SOGL, a golfing language created by dzaima? Your tips should be at least somewhat specific to SOGL. Please post one tip per answer.

code-golf tips

Downgoat

@DJMcMayhem was your computer hacked O_o

CartManager XD

What is unclear about this challenge? I would like to make it clear

9

Q: The Image of the Dragon

I saw a cool gif of the twin dragon curve made from a square, and wondered what would happen if we started from another base image. So I wrote a program to do this. It's so cool that I thought it would be fun to do it as a challenge. Task You will take...

code-golf graphical-output image-processing fractal

DJMcMayhem

@Downgoat XD nope definitely not, that's all intentional

Downgoat

@Pavel at least do -fu instead of -f

Pavel

What does -u do?

Downgoat

21:57

@Pavel sets default upstream

kk, apparently Xcode doesn't actually have entire C standard library ._.

Question: Clang doesn't seem to be have uint64_t, is there some flag I need to add?

Pavel

Why are you using Clang and not GCC?

Downgoat

@Pavel build should work on all compilers or else something is wrong

Pavel

Well, I looked it up on SO, the answer was to use GCC instead.

New Sandboxed Posts

22:25

0

A: Sandbox for Proposed Challenges

Test if a string can be made with substrings! Given a string and a list, say if the string can be made with items from the list. That is the golfed version of the question, here is the full: Given a string s and an array/list l, determine whether or not s can be made with parts from l. For ...

mınxomaτ

22:36

@Downgoat uint64_t should be in stdint.h or inttypes.h. For C++ it's cstdint. If all else fails, try <sys/types.h>

Downgoat

@mınxomaτ actually it was that in the include/ dir there was a stdint.h already which wasn't exactly properly working so yeah :P

yay, now macros aren't working :/

though I'm not sure why it would be looking at include/stdint.h when it was #include <stdint.h> :/

Downgoat

22:53

Question: if a header is not found, does/should Clang throw an error?

mınxomaτ

If the header isn't found, and clang doesn't error, how do you even know what header you are talking about?

Downgoat

I mean there is only one header in file

TIL Clang with C89 is not actually C89

ASCII-only

23:19

@Downgoat because headers are normally in /usr/bin/include maybe?

Downgoat

@ASCII-only no I mean in the user search path

:D only 11 errors now

#	define MIN(x,y) (((x) < (y) ? (x) : (y)))

Is there any reason to have to parens instead of just 1

ASCII-only

73

Q: When do extra parentheses have an effect, other than on operator precedence?

Parentheses in C++ are used in many places: e.g. in function calls and grouping expressions to override operator precedence. Apart from illegal extra parentheses (such as around function call argument lists), a general -but not absolute- rule of C++ is that extra parentheses never hurt: 5.1 Prim...

c++ c++11 language-lawyer parentheses c++-faq

Downgoat

10/10 quality avatar

Destructible Lemon

yo

Downgoat

aww yiss, down to 7 errors

Question: does anyone know what: "Unsupported: typedef changes linkage of anonymous type, but linkage was already computed" means in english

Destructible Lemon

23:34

"I hate you"?

TuxCopter

omg why

Downgoat

You know you're screwed when you google error messages and the mailing lists come up >_>

Downgoat

23:46

:O I think this is compiler bug

ATaco

Nice

Destructible Lemon

@Downgoat does that mean I was right?

Downgoat

yes

ckjbgames

1

Q: Google Autocomplete Fun

Your task is to create a program which, given an input string, will output the first Google autocomplete result for that search. The format of input/output is up to you. Rules Your program must take 1 input, a string, and output the top Google autocomplete/auto-fill suggestions result. The f...

code-golf string internet

Hello

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