The Nineteenth Byte

New Main Posts

18:05

0

Q: Reverse number - shortest

Who write shortest code win. for example: input: 1 2 3 4 5 6 54321 output: 54321 6 5 4 3 2 1

code-golf

Agawa001

@KennyLau do all fractal nubers have a repeat end ?

Kenny Lau

@Agawa001 Fractal number?

Agawa001

i mean what if an outcome happens to be like pi ?

Kenny Lau

@Agawa001 Are you referring to my challenge?

Agawa001

rational*

yes

Kenny Lau

18:07

yes, all rational numbers have a repeat end

Agawa001

so what if the repend is sooo laaarge do we print it all ?

i mean if it is greater than 100000007 / 2

Kenny Lau

Mod means that

if the repetend is 100,000,008

then print 1 instead

mod means remainder

like 26/3 leaves a remainder of 2

so 26 mod 3 is 2

New Main Posts

18:24

0

Q: Logical Algorithm to solve a specific task, The Ball Puzzle

You have an even number of identical balls. Half of them are "Light" balls and other half are "Heavy" balls which are heavier than the light balls for a unknown amount. You have to separate them into the "Light" box and a "Heavy" box using a scale instrument which tells you precisely for how m...

puzzle-solver

Agawa001

@KennyLau no no, i mean to "sweep" sorry, either we have to sweep two or more cycles of so large repend

or just stop when we cross 100000007 digits

Kenny Lau

no

not the length mod 100,000,007

but the repetend itself

if the fraction is 0.123456789123456789123456789123456789123456789

then return 123456789 mod 100,000,007

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@MartinBüttner ?

@EᴀsᴛᴇʀʟʏIʀᴋ I cant use python @ school

New pet peeve: (N more to go) at the end of comments. If your comment is that short, it probably isn't worth saying.

Martin Büttner

18:45

@CᴏɴᴏʀO'Bʀɪᴇɴ you wrote the opposite in your challenge

Cᴏɴᴏʀ O'Bʀɪᴇɴ

The opposite of...?

Martin Büttner

of what I said

you wrote "map the array over the following function"

Cᴏɴᴏʀ O'Bʀɪᴇɴ

and that's not the same as walking through it...?

Zgarb

@CᴏɴᴏʀO'Bʀɪᴇɴ Usually people say "map a function over an array", you wrote "map an array over a function".

TimmyD

It's just a question of semantics.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

18:49

Oh, I see.

Uh... gimme a minute >_<

I thought that's how you said it in math: "map the (domain/set/et al) over the function"--or am I misrembering?

@MartinBüttner BTW thanks for the catch

Martin Büttner

I think in maths you say "the function maps the domain [to ...]", but maybe that exists as well, don't know.

Anonymous

So I've had an eventful day

Anonymous

I discovered that my client might be a fraud artist

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@MartinBüttner Oh, that sounds correct.

@Mego o_O for what?

@Zgarb I found another problem with tryj.tk: the random function is terrible

Anonymous

Well, when they were explaining some details about their data so I could track down a bug in a form, they mentioned something that threw up some red flags

TimmyD

18:54

@Mego As in, a painter that sells forgeries?

Zgarb

@CᴏɴᴏʀO'Bʀɪᴇɴ Oh? I hadn't noticed that. do you have an example?

Anonymous

A few Google searches later, I now have a few pages of SEC documents detailing previous fraud cases against them and a business partner

TimmyD

O.o

Martin Büttner

@CᴏɴᴏʀO'Bʀɪᴇɴ what number range do we need to support? can we restrict the array to positive numbers only? non-negative? any integers? same for the value that's being added.

Anonymous

They sold people bogus currency backed by a bogus unrecognized sovereign state and claimed they could double people's money (so basically a Ponzi scheme)

Cᴏɴᴏʀ O'Bʀɪᴇɴ

18:56

@MartinBüttner Oh, hm. What seems the most logical? I guess there's no point in making the domain crazy huge.

zyabin101

We have three word chat, we should have thirty byte chat!

Martin Büttner

currently working on Labyrinth, and positive would definitely make my life easier. it's up to you, but I think most "normal" languages wouldn't be affected by not having to handle zeros, and it might make it easier on esolangs.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@Zgarb It may be my imagination, as doing some tests doesn't give me exactly the best results. It may just be my imagination

@MartinBüttner I love esolangs answer. I'll restrict the domain to positive integers for both. Would that be reasonable?

Martin Büttner

@CᴏɴᴏʀO'Bʀɪᴇɴ is it like this: random.org/analysis/dilbert.jpg

@CᴏɴᴏʀO'Bʀɪᴇɴ sure

Anonymous

@QPaysTaxes I've already gotten paid for the work I've done. I'm probably going to terminate the business relationship, though.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

18:58

@QPaysTaxes XD is this about EMBLEM?

Martin Büttner

@CᴏɴᴏʀO'Bʀɪᴇɴ make sure to change the test cases as well then

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@MartinBüttner aren't the test cases only positive integers right now?

Helka Homba

Quick poll - on your smartphone/tablet do you generally need to change (a) the ringtone/notification volume more, or (b) the media volume more?

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@QPaysTaxes idk :P

Martin Büttner

@CᴏɴᴏʀO'Bʀɪᴇɴ they've got zeros

zyabin101

18:59

@HelkaHomba Both.

:P

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@MartinBüttner .. isn't that a positive integer

Martin Büttner

@HelkaHomba my ringtone and notification volume are always off

so b) I guess

TimmyD

@HelkaHomba Both.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@HelkaHomba b

oh wait, zero is not strictly positive

Martin Büttner

@CᴏɴᴏʀO'Bʀɪᴇɴ 0 is neither positive nor negative. if you want to require zero, call it "non-negative" to avoid confusion.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

19:00

Okay, yeah, we need 0 :P

thanks

TimmyD

I think maybe I change the media volume slightly more often, but I set 'em both to 0 at work, and both to max elsewhere (my phone is really quiet).

Martin Büttner

There's also these things called time-based rules.

Anonymous

@HelkaHomba Media volume. My phone is always silenced unlesss I'm asleep.

Martin Büttner

What I do change is vibration on and off, but that happens automatically.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

#1 CG noob mistake: adding input validators :(

Martin Büttner

19:02

Mego speaks Parseltongue

Anonymous

@MartinBüttner Penguintongue*

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@MartinBüttner No joke, I did ?100#2 (100 random elements either 0 or 1) and I got 96 zeroes and 4 ones.

Zgarb

@HelkaHomba b. I regularly listen to a podcast that has a non-constant volume, so I have to keep fiddling with the volume buttons.

Martin Büttner

k, I guess I'll leave random array map in Labyrinth for the weekend then...

Cᴏɴᴏʀ O'Bʀɪᴇɴ

the weekend is ten minutes away for me :P

Helka Homba

19:05

Ok. To all those who said (b) and have an Android device, does it annoy you that you can only change media volume if something is already playing? If so complain here: code.google.com/p/android/issues/detail?id=65491

Cᴏɴᴏʀ O'Bʀɪᴇɴ

wait that's not right

(as in, "wrong")

PhiNotPi

I just got an email regarding changes to my university's email service...

Cᴏɴᴏʀ O'Bʀɪᴇɴ

good news, bad news, or irony?

PhiNotPi

does this make any sense? They are going to start blocking all files with a .zip extension.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

You can put viruses (viri :D) in a .zip :P

Helka Homba

19:08

@PhiNotPi Sounds like it will be a pain to email projects/assignments with multiple files around

PhiNotPi

They suggest getting around the restriction by naming files .zip.txt and then have the recipient change the name back to .zip

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@QPaysTaxes je ne parle jaimais les langues mortes

@QPaysTaxes :( I always mess that up BUT NO haha

Helka Homba

@QPaysTaxes Most normal (i.e. Windows) users have no clue what that is

Cᴏɴᴏʀ O'Bʀɪᴇɴ

sorry

@QPaysTaxes I'm okay with spam :P I'll try tho

Zgarb

@HelkaHomba It actually doesn't annoy me, I never even noticed this. I only touch the media volume when something is actually playing.

Anonymous

19:09

notavirus.rar

New Main Posts

-1

Q: Can someone explain this code

classname = input("Which class are you in? x, y, or z ") if not classname in ['x', 'y', 'z']:#list of classnames and boolean print ("That class does not exist - exiting") exit filename = classname +".txt" # This code names the text according to what the user inputs as the class file =...

python

zyabin101

too late ;_;

Cᴏɴᴏʀ O'Bʀɪᴇɴ

mod abuse 11 plz :P

zyabin101

@CᴏɴᴏʀO'Bʀɪᴇɴ waffles

Cᴏɴᴏʀ O'Bʀɪᴇɴ

You mean waff11es, of course.

zyabin101

19:10

I see that mods agreed on a keyword.

Helka Homba

@Zgarb But if you start something playing and it's silent you'll miss the first few seconds while you increase the volume.

VTCAKAVSMoACE

Such compression, much wow.

Martin Büttner

@HelkaHomba I don't know how to work with that, there's no upvote button.

Helka Homba

@MartinBüttner You can star and comment

VTCAKAVSMoACE

@VTCAKAVSMoACE If you're curious as to how this relates to compression, look at the "Used:" portion of the info...

Martin Büttner

19:12

ah, stars are good

4

Maltysen

@QPaysTaxes guis

Helka Homba

gooey

Zgarb

@HelkaHomba Ok, that's true.

Martin Büttner

@QPaysTaxes So how do you feel about people starring after you said it would make you sad?

VTCAKAVSMoACE

@QPaysTaxes wow

Anonymous

19:13

@VTCAKAVSMoACE How did you manage to use negative space?

VTCAKAVSMoACE

@Mego The world will never know.

Anonymous

@QPaysTaxes GUI library that comes standard with Python, based off of Tcl/Tk

zyabin101

@VTCAKAVSMoACE Oooooh. You're very lucky.

Helka Homba

Any comment about stars will get starred around here.

3

Anonymous

@QPaysTaxes Excuse me for writing a more detailed answer and missing the FGITW opportunity :P

Anonymous

19:15

Wait, your uni was teaching CS in Ruby?

Morgan Thrapp

No, it's because people actually use Python.

Anonymous

Mine did Java :(

Anonymous

ooh sick burn

Maltysen

ROASTE
D

Anonymous

Oh

Anonymous

19:15

So they missed the last 10 years and didn't jump on the Java hype train

Cᴏɴᴏʀ O'Bʀɪᴇɴ

bai

Maltysen

@Mego good for them?

Morgan Thrapp

@QPaysTaxes Have you never heard of Flask/Django/Bottle/Pyramid/numpy/scipy?

Anonymous

I dunno, C++ is very beginner-unfriendly

Maltysen

@MorganThrapp what's pyramid?

Anonymous

19:16

Java is just bad in general, but at least it doesn't try to screw over newbies until you get to string comparison

Morgan Thrapp

@Maltysen It's another web framework.

Maltysen

@MorganThrapp oh

Morgan Thrapp

@QPaysTaxes Yup.

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

You have an even number of identical balls. Half of them are "Light" balls and other half are "Heavy" balls which are heavier than the light balls for a unknown amount. You have to separate them into the "Light" box and a "Heavy" box using a scale instrument which tells you precisely for how m...

Helka Homba

@Mego Just Java? I must have had courses involving a dozen languages.

Morgan Thrapp

19:17

I did say what I mean.

Is joke. Much funny.

Such laughing.

And also no one uses Ruby.

Cyoce

Hey

Anonymous

@HelkaHomba I meant for the intro programming bit. My courses also used C (computer architecture), C++ (object-oriented programming methods), COBOL (data-oriented programming), VB.NET (event-driven programming), Prolog (logic programming), and Ada (real-time embedded systems).

Martin Büttner

Our first introduction to programming was done in Python.

VTCAKAVSMoACE

0

Q: My partition is using negative space. Should I worry?

As you can see, according to Disk Utility, I'm using negative space in /dev/disk0s7. This is obviously incorrect, however, I am slightly worried as to what this may mean for the partition's effects on the other parts of the disk. For the sake of completeness, here is the output of diskutil list...

hard-drive disk-utility partition storage dual-boot

Martin Büttner

But that same course (over two terms) later went on to teach us some basics in C, C++, Java, Scheme and Prolog as well.

Cyoce

19:23

Mine was Java, and the current intro class I'm taking is Python.

VTCAKAVSMoACE

My CS class is in Java, but that's because the AP is required to use Java.

Maltysen

^^^

VTCAKAVSMoACE

Nobody but me remembered how to Java, though, so we spent the first semester learning the language. I spent most of the class golfing.

Maltysen

@VTCAKAVSMoACE tuesday…

Cyoce

@VTCAKAVSMoACE Nice

VTCAKAVSMoACE

19:25

@Maltysen 3spoopy5me

Cyoce

@VTCAKAVSMoACE That's what I do in my current coding class.

VTCAKAVSMoACE

@Maltysen I got 38/40 on the MC mock and all but 1 point on the FRQ mock. :D

Maltysen

nice

VTCAKAVSMoACE

The rest of my class was like ಠ_ಠ

I swear, the only reason I know such specifics about Java is because of PPCG.

Maltysen

speaking of the APs, I should be studying for BC. where's Alex when you need to bother him with questions?

VTCAKAVSMoACE

19:27

kek

silently hopes for a 5 on BC

(this is Calc, yeah?)

Maltysen

yeah

@QPaysTaxes -_- thanks for the confidence boost

zyabin101

Apparently no one noticed Today's Infographic, so here it is again:

Maltysen

@QPaysTaxes lel. I'm in AB right now, but I'm taking BC, so I'm prolly gonna fail

VTCAKAVSMoACE

@Maltysen Uhhh this is a bad plan.

zyabin101

;_;

VTCAKAVSMoACE

19:29

Dennis is amazing at Calculus.

Maltysen

@QPaysTaxes I thought I knew most of the stuff from when I was really into calc in like 7th grade, but then it turned out that I had skipped most of sequences and series cuz it was boring, and now I'm all Q_Q I have a week left

Anonymous

@QPaysTaxes 5.1, PyPy3 is very unfinished

Maltysen

@QPaysTaxes it would be if I could unaddict myself from PPCG…

Anonymous

@Maltysen Hey, I made a 5 on Calc BC. I can help.

TimmyD

I remember on my AP calc test, there was a question that I swear did not need calculus to solve.

Anonymous

19:31

@QPaysTaxes I did it 4 years ago, but I also took calculus courses in college for my math minor, so it's still fresh :P

Maltysen

@Mego how do I do the p-series test for integrals? is it the same as for series?

VTCAKAVSMoACE

@Maltysen As long as you know Power series representations for 1/(1+x) and sin(x), you should be fine as far as the memorization goes.

TimmyD

@QPaysTaxes This was something blazingly simple, like given a water tower of diameter X and height Y, with an output spigot that can release Z cubic feet per second, how long does it take to empty the tower?

Maltysen

@VTCAKAVSMoACE those two specifically?

TimmyD

Yeah.

I'm pretty sure I spent more time trying to find "the trick" to it than actually answering the question.

VTCAKAVSMoACE

19:33

@Maltysen Yeah - you can derive ln(x) and cos(x) from those, provided you know how to integrate and differentiate power series.

Maltysen

@VTCAKAVSMoACE I had done taylor series cuz those are REALLY REALLY COOL, but skipped divergence/convergence, etc.

VTCAKAVSMoACE

@Maltysen That's one of the biggest things.

zyabin101

The Van Life imgur.com/gallery/j7D6Grz

Maltysen

@VTCAKAVSMoACE ._.

I kinda know some of the rules now

TimmyD

I remember just figuring out the volume of the tower, divided it by Z, and gave my answer. Got a 5, so...

VTCAKAVSMoACE

19:33

@Maltysen As long as you know the ratio test, you should be good for power series divergence/convergence.

Anonymous

@Maltysen You mean the integral test?

Maltysen

@Mego maybe? it was like for what values of p does this indefinite integral converge

Anonymous

Oh

Anonymous

It's p > 1 for a p-series, so the same is true for an integral

Maltysen

and it looked like a p-series problem if it was a series and not an integral

Anonymous

19:35

That's combining p-series and integral test

Maltysen

@Mego oh, k thanks. so it works the same way?

Anonymous

Pretty much

VTCAKAVSMoACE

@Maltysen A summation is essentially an integral where the dx is 1.

¯\_(ツ)_/¯ Same rules apply for both.

Maltysen

@VTCAKAVSMoACE oooh that's a really nice way to think about it

Anonymous

There are a few differences, but they aren't important for what you need to know for AP

VTCAKAVSMoACE

19:36

@QPaysTaxes 10 years later

Martin Büttner

I just ran Doorknob's language stats script on the latest data dump, so figured I might as well post it in here, in case anyone's interested (limited to languages that were used at least 25 times):

python: 5234
javascript: 3330
ruby: 1966
perl: 1908
c: 1809
cjam: 1697
haskell: 1451
mathematica: 1412
pyth: 1361
java: 1259
php: 1089
golfscript: 994
c#: 886
bash: 849
j: 818
apl: 681
r: 662
c++: 574
matlab: 497
powershell: 497
julia: 428
scala: 387
k: 335
lua: 296
brainfuck: 261
retina: 233
ti-basic: 230
befunge: 222
groovy: 212
matl: 203
&gt;&amp;lt;&gt;: 179
japt: 177
sed: 160
jelly: 152
common lisp: 145
octave: 138
clojure: 136
batch: 130
dc: 128
tcl: 123
seriously: 122
q: 117
coffeescript: 116

quartata

Was there a new data dump?

Martin Büttner

was there not?

I think the last numbers I saw were much smaller

let me check

Maltysen

@Mego k thnx

ven

@MartinBüttner can you please post this as a gist?

aditsu

19:38

@QPaysTaxes is it this one?

TimmyD

Aww, yeah ... in your face Julia @AlexA. :p

Martin Büttner

@quartata looks like this one's from 1st of March

ven

@MartinBüttner seems liek LiveScript doesn't have enough answers to compete :(

Alex A.

@TimmyD D:

ven

?

Alex A.

19:39

I'm not the guy you're looking for, I guess

Martin Büttner

@ven 17

gist: PPCG Language Usage Statistics as of 2016-03-01, 2016-04-29 19:39:16Z

ppcg-language-stats.txt

Maltysen

@VTCAKAVSMoACE do we have to know any other convergence rules? like the alternating one and stuff?

ven

@MartinBüttner okay! will keep trying :). thanks

Alex A.

@QPaysTaxes ¯\_(ツ)_/¯

TimmyD

@AlexA. :D I still like you

Just that julia-is-alex

Alex A.

19:41

@MartinBüttner Feature request: s/>&<>/><>/g

Martin Büttner

complain to doorknob

Alex A.

With pleasure

TimmyD

Is that really a feature request?

More like a bugfix

Alex A.

@Doorknob I'm tired

TimmyD

:D

Alex A.

19:42

@MartinBüttner Like this? ^^

Am I doing it right?

VTCAKAVSMoACE

@Maltysen You should know: nth-term divergence, integral test, p-series test, ratio test, telescoping series, geometric series test, direct and limit comparison tests, absolute convergence test, and the root test.

Martin Büttner

@AlexA. yeah, uh, sure.

Alex A.

+1 and accept for me

Maltysen

@VTCAKAVSMoACE i think I know most of them…what are the nth-term divergence, direct, and root? I know the limit one but not the direct one

VTCAKAVSMoACE

@Maltysen dropbox.com/s/0hbcdr18pkxs8h7/all_series_tests.pdf?dl=0

TimmyD

19:45

@AlexA. You are winning by 5 bytes on the run-through-an-array challenge, and I don't think I can catch you

Maltysen

@VTCAKAVSMoACE oh cool thanks

Alex A.

@TimmyD >:D

I'm running too quickly through the array

TimmyD

If I didn't have to use $ for variables, we'd be tied

Maltysen

@VTCAKAVSMoACE could you just like give me your teacher's number too? :P

VTCAKAVSMoACE

@Maltysen Uhh no. But I can upload more Series pdfs and share the folder with you, if you'd like.

Maltysen

19:47

@VTCAKAVSMoACE would you really? thanks! <3 <3

Helka Homba

Alex A.

6

Q: Run through an array

We all often hear the idiom "walk through the array" to mean "map the function over the following array". However, I need it done (now!), so I want you to run through the array. How do I run? Imagine there's a wild pack of wolves behind you Running through an array is like walking through one,...

code-golf array-manipulation random

Helka Homba

Much

Alex A.

Amaze

quartata

OK, I kinda have to be bring this up... but I'm seeing people using this meta post as "popularity contests are no longer on topic here" in close reasons/comments

This is wrong that's not what that answer says at all

6

please don't phrase it like "this is community consensus all popularity contests are off-topic" kthx

VTCAKAVSMoACE

19:49

@Maltysen dropbox.com/sh/qxf4wtlz8fsxzac/AABXWB1arEGmed1EDtBXipUqa?dl=0

Helka Homba

@quartata I agree. But example of that being used?

quartata

@Polynomial this was on-topic when it was asked, and when it was asked(and up until a few months ago) "most votes" was objective. this is no longer the case: meta.codegolf.stackexchange.com/a/8134/46231 — cat 4 hours ago

I didn't really want to name names

There's more examples than that of course but I just saw this in the review queue and I had to say something

@HelkaHomba d'awwhh

Also I just noticed I said "to be bring this up" oops

Anyways, I just in general think this close-fest of popularity contests is a little premature. We really haven't reached consensus on it.

VTCAKAVSMoACE

@Maltysen Did that help?

quartata

also ffs some people actually closed that question as

"This site is for programming contests and challenges. General programming questions are off-topic here. You may be able to get help on Stack Overflow."

Please. Don't do that.

Maltysen

@VTCAKAVSMoACE still reading through the convergence tests pdf, but yes, also I don't need to know all the other ones you didn't mention, right?

like cauchy and zero-limit

VTCAKAVSMoACE

19:56

@Maltysen Cauchy, log-q, and zero-limit are not on the AP

Maltysen

kk

flawr

(at UCSB)

quartata

Huh, I've visited UCSB and I don't remember seeing that. Is it new?

TimmyD

@quartata I VTC'd it because of meta.codegolf.stackexchange.com/q/4829/42963 ... but apparently my reason got eaten by the two other canned answers.

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