The Nineteenth Byte

Initially all my rep was from this and everyone was like "oh, this guy just has one good answer that keeps giving, he got too much rep with too little effort, blah blah blah" but then I kept going xD

Mayube

hmm

js seems to think my object is circular, but I'm convinced it's not

ETHproductions

3:06 PM

@MDXF hah, nice

MD XF

What the...

ETHproductions

Um

MD XF

there's like an 0.5% white bar to the far right

that's not right

ETHproductions

Maybe you've only asked well-received questions on 4.99 days

MD XF

Oh that's probably it

I went on a question spree last weekend

posted like 3 in the space of 24 hours

hah 3 of them hit the HNQ :P

Oh and one of my questions has the best answer I've ever seen

ETHproductions

3:10 PM

Holy cow

Mayube

ah it was cos some of my variables were global

oops

Alex K Chen

Installing a graphics libarary at C requires reinstalling the software to code you're using (eg: VS, MinGW etc) ? [cc: @Mego]

Phoenix

3:21 PM

@MDXF On PPCG, the likeliness of a challenge to hit HNQ is inversly proportional to its quality.

Trivial challenge gets a lot of answers really fast, hits HNQ.

Wheat Wizard

Is there a way to search tag descriptions?

Leaky Nun

May 15 at 6:18, by Kenny Lau

CMC: is n a perfect square? (input: non-negative integer n)

CMC: do the above challenge in SILOS (tio link, github link)

Nathan Merrill

@Mego I've gotten quite a few people riled up. :)

Anonymous

@NathanMerrill If you're not making people mad, you're doing something wrong :)

Leaky Nun

cc @RohanJhunjhunwala

flawr

3:29 PM

@Riker I agree

mınxomaτ

@NathanMerrill What I've been doing is the same thing that lxrun does by default, it basically dumps a rootfs onto disk.

MD XF

@Phoenix this qualifies as trivial?

Leaky Nun

@Adám because some languages do not have the concept of "integer" or "2D array"

Phoenix

@Mego As an RO, isn't it your job to make sure people don't try to make each other angry?

3

Adám

@LeakyNun Ah, ok.

Anonymous

3:31 PM

@Phoenix Well, sure. I was mostly joking :)

Phoenix

So was I

Anonymous

People can be angry with each other all they want. Just don't vent that anger in here :)

Erik the Outgolfer

anger decreases overall morale 0/10

Mayube

oh hell yeah

arcplus interpreter officially works

Anonymous

@EriktheOutgolfer Beatings will continue until morale improves

2

Nathan Merrill

3:38 PM

@Mego I don't think you can assume dynamic types, because C# doesn't do so unless you explicitly tell it to

I don't know C#, just quoting this:

@milk C# will never assume dynamic unless it's the natural consequence of the type inference, but you can indeed write almost anything in a lambda as long as you assign it to a lambda with the right number of (dynamic) parameters. C# also never guess pointer types (even if it could in theory know it's a pointer, it has no idea what type it points to). — VisualMelon Jan 12 at 22:32

Erik the Outgolfer

@Mego I was referring to the anger feeling as well as public anger totally don't recommend do it privately folks

Phoenix

Does dynamic let you write C# duck-typed?

Anonymous

@Phoenix I don't think so. dynamic just means "this can be any type, figure it out at runtime, and allow multiple types" IIRC.

Phoenix

That's halfway there.

Function args and return types can be dynamic

I wish C# had a repl so I could test easily.

Oh cool, it does with Mono

Mono's repl doesn't let me make dynamic methods. ;-;

Anonymous

I've lost the will to continue arguing in circles

Phoenix

3:49 PM

I think I might not understand what duck typing actually is.

And apparantly the reason I failed at the C# repl was because methods must be in a class.

Anonymous

Duck typing is when the types don't matter - the methods exposed by the class/object do

Phoenix

Ok, so if in C# you make everything dynamic, you have duck typing. Wikipedia says so. That's neat.

BradC

So, I have a question about input values for challenges, specifically in T-SQL: Can I just declare a variable for the input value like DECLARE @a INT = 50000 before I start my code? If so, does that line count toward my byte total? Surely the characters in the "50000" wouldn't, right, because that changes?

Otherwise, I'll go with the "assume the value is already stored in a table" method

The FAQ says "no" to "assume the value is stored in a predefined variable, but I still see people doing it in other languages:

-26

A: Default for Code Golf: Input/Output methods

Programs may take input by assuming it is stored in predefined variables.

Phoenix

@BradC Those people get downvoted and told off for doing so.

Sometimes people break the rules.

BradC

ok. So a named table is the "approved" method, then:

27

A: Default for Code Golf: Input/Output methods

SQLs may take input from a named table which is probably not good enough. But I don't know a better way.

thanks

BradC

4:21 PM

Anyone who knows SQL, would love to find more improvements for this one:

0

A: CSI: Minecraft Items

T-SQL, 139 134 139 bytes Input is stored in column a of pre-existing table t. SELECT IIF(a=0,'0i',REPLACE(IIF(a<1728,'',STR(a/1728)+'c') +IIF(a%1728<64,'',STR(a%1728/64)+'s') +IIF(a%64=0,'',STR(a%64)+'i'),' ',''))FROM t Line breaks for rea...

Christopher

Hey Phoenix I see you are typing. Is that true?

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

Triangularize a string code-golf ascii-art While working on a new 2-D triangular programming language last night, I ran into a spot of trouble trying to print a string in the form of a triangle. After a few hours of scribbled mathematical functions and messy algorithms, I figured it out, very fl...

Business Cat

@NewSandboxedPosts I feel like this is a dupe

Christopher

And Business cat is typing

MD XF

@BusinessCat Me too but I couldn't find one

Phoenix

4:23 PM

CMC: Ask user for input (can be a word, line, char, whatever), and output it again, however if the user doesn't give input for more than 10 seconds, stop waiting and end execution.

MD XF

@BusinessCat Is it actually a dupe or does it just seem like one?

Business Cat

I remember seeing something like it

But I'm not sure if I can find it

It may have been another sandbox post...

Shaggy

0

A: Sandbox for Proposed Challenges

It's Hip to be Square! Meta Looking for feedback on the idea, initially, before writing up the details & test cases. Challenge Given an array of non-unique integers greater than 0 output a truthy value if every integer in the array is a square and the sum of those integers is also a s...

Leaky Nun

@Phoenix I don't actually know how to do it... it would require two threads imho, one to receive the input, and one to wait for 10 seconds

J Doe

I’d like to comment Luis Mendo’s answer to the code golf challenge “How high can you count?” but I cannot comment. Need 50 reputation to do so, I’m new...

Any suggestion?

Business Cat

4:28 PM

You could ping him in here, he comes in every now and then

Kritixi Lithos

@LeakyNun It's easy in Processing with a graphical approach

Leaky Nun

Can you even do it in Python?

Can you terminate the input() function?

Phoenix

I'm confident it is possible.

Mayube

Assumption: the user will Ctrl + C after 10 seconds

:P

Leaky Nun

how? The input() just waits for the input, and any code after it...

Kritixi Lithos

4:30 PM

does Python have threads?

Phoenix

I have this sketchy idea: Create thread A. A asks for input, Main waits 10 seconds. A will write it's input to a global variable, which Main can do things with, however after it's done waiting Main kills A.

Leaky Nun

3 mins ago, by Leaky Nun

@Phoenix I don't actually know how to do it... it would require two threads imho, one to receive the input, and one to wait for 10 seconds

I never dealt with threads though

Phoenix

I'm sure python has threads

Leaky Nun

yes, but I never used them

Phoenix

I'm trying to achieve this in C#, actually.

Anonymous

4:31 PM

@KritixiLithos Yes, but if you're using CPython, they're not going to help

New Main Posts

0

Q: Create a mutual quine with brainf*** and one other language

You will create two programs, one in BF, and one in a language of your choice. The BF program, given empty input, will output the source code of the other program. The other program, given empty input, will input the source code of the BF. Keep in mind that the rules for quine programs apply: no...

Phoenix

@Mego Why not?

(CPython is the bog standard one right)

Anonymous

@Phoenix Global interpreter lock. Only one thread can be executing Python code at a time. Threads will work if you use a lot of native code, but otherwise multiprocessing is your best bet.

Phoenix

That's disappointing.

betseg

@Phoenix bash sleep 10 &;(read a;echo $a);wait;exit (if youre ok with printing other things)

Phoenix

4:33 PM

How does it work?

Adám

@Phoenix May we throw an error if nothing is input?

Christopher

I am thinking of doing a KotH but can't decide if I want to have a bracket filled randomly or to have a round-robin

Phoenix

@Adám Sure

Adám

@Phoenix APL, 8 bytes: ⍞⊣⎕RTL←3

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

It's Hip to be Square! code-golfmath Meta Looking for feedback on the idea, initially, before writing up the details & test cases. Is this a dupe? Tag suggestions? Challenge Given an array of non-unique integers greater than 0 output a truthy value if every integer in the...

J Doe

4:35 PM

@BusinessCat ok thank you
@LuisMendo I cannot comment your answer to the code golf challenge “How high can you count?” but how about 0~:0 at line 10 instead of `@QQQQQQQQQ@@< and `@QQQQQQQQQQQQQQQQQQQQQQ@@< at line 23?

Anonymous

@Phoenix If you use another Python implementation (like IronPython, Jython, etc. but not PyPy), there's no GIL, so threads work fine.

Christopher

Sandbox speed check: 12:36 EST

Leaky Nun

from _thread import*
from time import*
def a():
 while clock()<600:0
 interrupt_main()

start_new_thread(a,())
print(input())

This didn't work; after 10 seconds it is still waiting for input

Anonymous

The usual way of doing that involves signals

Leaky Nun

@Mego can you tell me what is wrong with my code?

Anonymous

4:37 PM

Well first off you shouldn't be using _thread - that's low level threading stuff. Use threading

caird coinheringaahing

hello!

Leaky Nun

@Mego I don't understand how to use threading.

Anonymous

I'm writing up an example, one minute

Leaky Nun

thanks

Phoenix

@Christopher I trhink you need to update your "I am Typing"

Christopher

4:42 PM

@Phoenix Why?

Phoenix

It was spazzing out.

You kept blinking.

MD XF

Anyone, is this a dupe?

0

A: Sandbox for Proposed Challenges

Triangularize a string code-golf ascii-art string While working on a new 2-D triangular programming language last night, I ran into a spot of trouble trying to print a string in the form of a triangle. After a few hours of scribbled mathematical functions and messy algorithms, I figured it out, ...

Erik the Outgolfer

@Phoenix there's no update afaict

Leaky Nun

@Mego why is your repository still called "Seriously"?

Christopher

@Phoenix huh that is odde

codegolf.meta.stackexchange.com/questions/2140/… .

Can i get a review of ^ it looks clear and almost ready

Anonymous

4:48 PM

@LeakyNun Because the language was originally called Seriously. When I rewrote large parts of it and introduced backwards-incompatible changes, I called that v2 and named it Actually. Since Actually is the version being actively developed, it's the main branch, and Seriously is on the v1 branch.

Leaky Nun

@Mego why didn't you just create another repository?

I swear I'm going to call it resipotory some day by getting confused

Business Cat

@MDXF Found it

Downgoat

Question: is there a button/icon you associate with both logging out and logging in?

MD XF

@BusinessCat Dammit

Adám

@Phoenix I really like it. Please post on Main.

Kritixi Lithos

4:49 PM

@Downgoat why not have a button change its icon once you login/logout

Anonymous

@LeakyNun Because it's still the same language.

Leaky Nun

us.123rf.com/450wm/faysalfarhan/faysalfarhan1604/…

Just change the arrow to face both directions @Downgoat

Anonymous

Please make that unonebox

Downgoat

@KritixiLithos idk requests are async and it's quite a pain as I'd have to do a loading thing and all sorts off stuff with callback etc.

Anonymous

Thanks

Leaky Nun

4:50 PM

@Mego sorry

Luis Mendo

@JDoe Hello! Thanks for the idea. Unfortunately 0~:0 produces 1 and 0 separated by a newline. It would require post-pending something like vVXz or hVXz(concatenate, convert to string, remove spaces), but both v and h are already taken

Adám

@Mego How does one toggle oneboxing?

Leaky Nun

@Adám [image](image)

in my case, it doesn't onebox before I add an exclamation point

Thomas Ward

@Adám not posting pure links works too :P

Leaky Nun

so I just had to remove the exclamation point

Anonymous

4:51 PM

That or put some other text in the field

Downgoat

Apparently there's this one island in the Gulf of Guinea that is emitting as much CO2 as the entire continent of Australia

Kritixi Lithos

sheepville?

because sheep are evil

Downgoat

probably

Leaky Nun

@Mego It's been 13 minutes...

Downgoat

I think it's Sao Tome but don't see any island on map

Anonymous

4:52 PM

@LeakyNun I got busy. Patience.

Kritixi Lithos

how fast do you expect a penguin to type with only flippers? :P

New Sandboxed Posts

-1

A: Sandbox for Proposed Challenges

Welcome to Win the Challenge KotH. You need to win, (duh) or your code loses a byte in the order you specify. Errors are ignored unless they cause the program to not finish or crash. This is my setup: from multiprocessing import Process programAScore = <yourBytes> programBScore = <OtherBytes>...

J Doe

@LuisMendo I thought newline is allowed.

Downgoat

@KritixiLithos :| you think flappers are bad?

Luis Mendo

@JDoe Only leading or trailing; not between digits

Congrats @StewieGriffin for your great-question gold badge!!

Anonymous

4:55 PM

@LeakyNun Threadless way of getting input with timeout

Luis Mendo

^^ Actually it's two gold badges for that question!!

Leaky Nun

@Mego how does it work?

Anonymous

@LeakyNun POSIX signals. signal.signal(signal.SIGALRM, handler) registers the callback function for SIGALRM. signal.alarm(60) registers a SIGALRM to be raised in 60 seconds. If input is given in under 60 seconds, the signal.alarm(0) call is reached, which disables the alarm. If not, the process is interrupted and handler is called.

Leaky Nun

@Mego oh, nice

Christopher

@Dennis so I think I found a possible bug but the problem is I can't test it without another users help. The big problem is it involves a mod. Basically I think I can re-feature posts with just editing privileges. Are you willing to help me double check? All I need is a question on the meta to get the featured tag and then the featured tag be removed.

Anonymous

5:03 PM

I'm pretty sure rolling back the edit won't work, if that's what you're thinking

Anonymous

But if you need one to test, the Best of PPCG 2016 post used to be featured

caird coinheringaahing

@LeakyNun I thought it would ask me for confirmation (as my computer normally does when i click buttons) but just forget about it

Leaky Nun

@cairdcoinheringaahing alright

Christopher

@Mego Thanks

Anonymous

Alternatively so did the Community Promotion Ads 2017 post

Christopher

5:06 PM

Ok so you can't rollback to that. But you may be able to remove it.

quartata

So NobodyNada has set up the FireAlarm bot to catch low quality PPCG questions, what is everyone's opinion on having it run in here? It doesn't have any commands that would clog up chat and so far there have been very infrequent reports, so I'm not worried about it causing noise.

cc @Dennis

Sample report:

in SEBotics, 11 hours ago, by FireAlarm

[ FireAlarm-Swift ] [tag:c#] Potentially bad question C# window form inspect view link download @NobodyNada @quartata @Mego

Christopher

Ok so my ideas didn't work thankfully I just had a error in my original test. CC Dennis

quartata

(and the stackapps post: stackapps.com/questions/7183/…)

Anonymous

@quartata I'm neutral right now. It doesn't seem to be doing a great job of catching low quality questions. I've been pinged a lot for valid questions.

quartata

Probably should make it clear for everyone else that getting pinged is opt-in

Most of the "valid" questions I've seen are ones worthy of attention anyways, usually unclear or duplicates

J Doe

5:12 PM

@LuisMendo I took this “leading and trailing spaces and newlines etc. are allowed” literally. Maybe it was implicit that newlines are not allowed between digits but when it does not state it is not allowed, I tend to think it is

Leaky Nun

Is [a,b]=[0,1] faster or a,b=0,1 faster in Python?

quartata

@LeakyNun The later

List unpacking is slow

Leaky Nun

thanks

is [a,b]=c faster or a,b=c[0],c[1]?

quartata

Probably the latter too, but that I'd have to benchmark

Anonymous

a,b=c would be faster, I think

Anonymous

5:14 PM

Assuming that c only has 2 elements

Leaky Nun

@Mego does it work?

it does :o

Anonymous

Yep

Leaky Nun

we both used [0,1] as testcase :o

Anonymous

It's almost like I did that on purpose :P

quartata

whaaaat

Anonymous

5:15 PM

a,b=c[:2] should be fast and safe, but a,b=c[0],c[1] might be faster

Anonymous

@quartata Crazy, right?

Leaky Nun

@Mego can you test which one is faster?

Phoenix

Can you?

Leaky Nun

I'm not familiar with time

quartata

docs.python.org/3/library/timeit.html

Leaky Nun

5:18 PM

@quartata thanks

a,b=c[0],c[1] is consistently faster than a,b=c[:2]

however, a,b=c is also consistently faster than both

Anonymous

timeit is a better option

quartata

That's what I linked

Leaky Nun

@Mego I used timeit

Anonymous

Oh ok, I didn't look at the whole link

Shog9

@Christopher Lemme introduce you to nicael...

Phoenix

5:23 PM

time python -c 'for i in range(100000):c=[0,1];a,b=c'

quartata

@Shog9 haha

New Main Posts

5:40 PM

1

Q: Golf an Anagram Quine

In this question I asked you to guess an anagram quine based on its output. However it looks like we don't have a question asking to golf an anagram quine yet. So your task will be to make the shortest anagram quine that you can. What is an anagram quine? An anagram quine is a non empty progr...

code-golf quine anagrams

Leaky Nun

@Mego is █ nCr intended to be used with floating points?

Anonymous

@LeakyNun Probably not

Leaky Nun

@Mego alright

Stewie Griffin

6:11 PM

@LuisMendo thanks :) Looks like people enjoyed /enjoys it :)

Christopher

@Shog9 When Shog9 comes in to tell you off O_O

Leaky Nun

Is [x for x in a] identical with list(a)?

Phoenix

It's identical to a, given a is a list.

Leaky Nun

@Phoenix that isn't what I'm asking

Downgoat

Question: what is most fast algorithm to find 10 smallest item in unsorted array

(array is not sortable too)

Leaky Nun

6:24 PM

array guaranteed to have 10 smallest items?

array contains distinct items?

New Meta Posts

0

Q: Can an language invented before a challenge was posted be used to answer the challenge if it lacked an interpreter at the time?

Say I invent a language, post a list of commands and general structure on GitHub, and then begin working on the interpreter. After finishing the interpreter, could I use this language to answer challenges posted before the interpreter was completed?

discussion

Leaky Nun

You can just use 10 pointers and scan through the array, which should give you an O(n) algorithm

ETHproductions

@LeakyNun Wouldn't that be O(n*10)? (maybe that's the same, I don't really know big O notation)

Phoenix

@LeakyNun Going through the array, finding the minimum, recording it, removing from original, and repeating 9 more times is still O(n).

Business Cat

O(10n) = O(n)

Leaky Nun

6:27 PM

@Phoenix somehow I feel like using 10 pointers is faster

Phoenix

O(x*...) = O(...)

ETHproductions

That's kind of what I thought, but I wasn't sure...

Phoenix

@LeakyNun Well, not by much, Instead of updating 10 pointers one after another you're updating them together, but you're still performing N operations on 10 pointers.

Leaky Nun

@Phoenix you're right

Downgoat

CMC: output all metro stops in continental US in JSON or KML format

ETHproductions

6:33 PM

OK, so since O(n) is obviously the optimal limit on a theoretical level, I'll look at it practically: keeping an array of the 10 smallest items in order would probably be fastest, since worst case is 10*N comparisons if the array is in reverse sorted order, but if an item is larger than the current max it'd only require one comparison

Phoenix

Something something Mathematica

ETHproductions

idk if pointers would be faster than an array though

Leaky Nun

an array is just a list of pointers

Adám

@Downgoat At a given time?

Downgoat

would be best if you grab live data but you can also hard code

Adám

6:37 PM

@Downgoat Why specifically continental US? (Dyalog APL comes with Europe's built-in!)

Downgoat

:O that is even bettter

but O____O is Dyalog APL mathematica confirm???

quartata

Partial sorting

In computer science, partial sorting is a relaxed variant of the sorting problem. Total sorting is the problem of returning a list of items such that its elements all appear in order, while partial sorting is returning a list of the k smallest (or k largest) elements in order. The other elements (above the k smallest ones) may also be stored, as in an in-place partial sort, or may be discarded, which is common in streaming partial sorts. A common practical example of partial sorting is computing the "Top 100" of some list. In terms of indices, in a partially sorted list, for every index i from...

Adám

@Downgoat Usually not, but you just happen to have chosen one data set it does come with.

Downgoat

.____.

MD XF

Pls support my campaign

0

Q: Code Golf Redesign

About a year ago, Programming Puzzles and Code Golf Stack Exchange graduated. Now, from what I can tell, most graduated sites (e.g. Code Review, Photography, Unix & Linux, etc) have customized backgrounds and designs. However, PPCG does not. Some of the more devoted users have created a Userscr...

feature-request support design graduating-sites code-golf

Alex K Chen

6:40 PM

> " and you'd be better suited with MinGW and an IDE like Code::Blocks or NetBeans."- @Mego the great

How to install that ?

Phoenix

@AlexKChen The correct IDE is Jetbrains Clion

Alex K Chen

@Phoenix Basically, what I can do on any computer on C, I can do it in that IDE ?

(For visualization, simultaion of physics)

Downgoat

> The userscript is good for now, but as an active PPCG user, I would much rather have a professional design from SE staff.

:(

Phoenix

:-(

Alex K Chen

@Phoenix ?

Phoenix

6:43 PM

I no longer understand the question.

DJMcMayhem

@Downgoat Oh come on. Your usercript is awesome, but of course an SE design would be better.

Maybe elements could be similar

Downgoat

opls like SE userscript would have upgoat and downgoat voting icon

Leaky Nun

28 mins ago, by Leaky Nun

Is [x for x in a] identical with list(a)?

Alex K Chen

I mean I am an absolute newbie to coding, and I am learning C basically for visualizing and simulating physics stuff, and I am learning it from K&R. Like python IDLE, is running the code on the IDE sufficient to do all stuff ? @Phoenix

New Meta Posts

0

Q: Code Golf Redesign

About a year ago, Programming Puzzles and Code Golf Stack Exchange graduated. Now, from what I can tell, most graduated sites (e.g. Code Review, Photography, Unix & Linux, etc) have customized backgrounds and designs. However, PPCG does not. Some of the more devoted users have created a Userscr...

feature-request support design graduation

Alex K Chen

6:46 PM

@Phoenix ?

Phoenix

@AlexKChen The IDE just organizes your code files and adds a shiny "run" button.

It's not running your code in a different way from the command line.

Dennis

@quartata Our question volume is pretty low. I'm not sure this adds anything over NewMainPosts; off-topic questions are closed almost instantly when it announces them in chat.

Alex K Chen

I actually don't have a clear idea what IDE is. Is it like python IDLE ? Or would I have to code somewhere else @Phoenix

Phoenix

@AlexKChen It's a magic program that gives things like syntax highliting, organizing your files, checking you code for syntax errors, etc.

@AlexKChen Python IDE

Look at the screenshots and such

Alex K Chen

So would I have to install a separate stuff for coding ? Or just typing in the IDE is sufficinet ?

Phoenix

6:50 PM

@AlexKChen Well, on Windows you would need to install a C compiler, probably MinGW

This is relatively complicated for someone just starting to code.

Alex K Chen

Yeah. Well, very much yeah.

Phoenix

Visual Studio comes with a C compiler, so it might be easier.

Despite what people might tell you about it, Visual Studio is very usable, and the community edition is free.

Leaky Nun

35 mins ago, by Leaky Nun

Is [x for x in a] identical with list(a)?

Alex K Chen

I have heard VS is oe'rkill, and too o'erkill for a beginner, and too too o'er kill for an ultra beginner.

Leaky Nun

@Dennis do you have any idea?

betseg

6:51 PM

i asked a SO admin, they say we'll get a design in 6 to 8 weeks

Alex K Chen

@Phoenix I have installed VS studio today. Does it have all the functionality of C ?

Phoenix

@AlexKChen The entire VS install is like 100 GB or so, so it comes as a ton of optional components. Try making a new project and see if "Visual C++" is one of the options.

Alex K Chen