The Nineteenth Byte

flawr

19:00

@Downgoat flappers!

The real flappers:

Conor O'Brien

that's quiet enough >_>

trichoplax

@flawr The one on the left doesn't seem to be casting a shadow...

flawr

The music is missing

@trichoplax Better now?=)

trichoplax

I guess... :P

TùxCräftîñg

1: 5/5
2: 5>>5/5
3: 5^5/5+5
4: 5-5/5
5: 5
6: 5+5/5
7: 5/5+5|5
8: 5+5&5*5
9: 5+5-5/5
10: 5+5

here are the optimal solutions for 1..10

trichoplax

19:04

@flawr I think I preferred the massive code blocks ;)

Downgoat

5

trichoplax

@TùxCräftîñg on my screen this takes up most of the chat window, and I imagine it's detracting from the conversation for others too. I'm close to moving these to a separate room

TheBitByte

Is moving almost guaranteed to be good challenges out of the sandbox quickly, a good thing to do?

trichoplax

@TheBitByte If such a guarantee existed we wouldn't need the sandbox... It's always worth waiting a few days to see what other people can spot

Jonathan Allan

@flawr ugh 9/10 on "I cheated on my boyfriend with "

TheBitByte

19:12

@trichoplax Okay.

trichoplax

You don't have to wait - you can sandbox the next one while you wait for feedback...

TheBitByte

Haha, okay.

trichoplax

:)

TheBitByte

I'm out of ideas.

:(

flawr

@TheBitByte Then go play googlefeud.com

TheBitByte

19:14

@flawr :+1

Jonathan Allan

@trichoplax if I have no comments and no votes either way in 53 hours on a sandbox post :/

(my first and only sandbox post)

trichoplax

@JonathanAllan Could you post a link here? Sometimes the chat room isn't busy enough the first time the bot posts it

TheBitByte

@JonathanAllan Link?

Jonathan Allan

0

A: Sandbox for Proposed Challenges

When is their birthday? Donald Knuth was born in 1938, on the 20th day of Capricorn. The first day of Capricorn is the 22nd December. Donald Knuth was born on the 10th of January. The challenge Write a program or function which takes three inputs about a person (any other specified order is ...

any other tags than code-golf suitable?

trichoplax

There's date

βετѧ Λєҫαγ

19:18

There's knuth

trichoplax

@JonathanAllan What range of years does the code need to work for?

@βετѧΛєҫαγ Ha ha I actually clicked on that to see...

βετѧ Λєҫαγ

@trichoplax If only :D

Jonathan Allan

@trichoplax since I specified no shift it could work for any (Gregorian) year

trichoplax

@JonathanAllan It might be worth mentioning which leap year rules you want taken into account to make it explicit. I think it's pretty clear already, but maybe something like the "Every year that is exactly divisible by four is a leap year, except for years that are exactly divisible by 100, but these centurial years are leap years if they are exactly divisible by 400" from the Wikipedia page?

Jonathan Allan

@trichoplax OK I'll add the specifics :)

@TheBitByte what is too restrictive?

trichoplax

19:24

I'm really just picking at whatever pedantic points I can find, since it looks pretty ready to me

Downgoat

question: is there any need for generics in a dynamic language?

Jonathan Allan

@trichoplax I did try to be thorough (I have no idea if that's the correct spelling)

trichoplax

Looks thoroughly correct to me

(at least my browser didn't complain)

TheBitByte

@JonathanAllan Care to look at my challenge too? It's right up the sandbox.

trichoplax

@JonathanAllan I half expected the output to include the year too (since Knuth's year would be different according to whether you measure by Zodiac or calendar months). No idea which way would be more interesting though

Jonathan Allan

19:28

@TheBitByte looks fine to me

TheBitByte

What about mm-dd-yyyy, etc?

Jonathan Allan

@trichoplax the year (e.g. 1938) is in the input, so it's not too challenging to output it

@TheBitByte there are no date formats

TheBitByte

@JonathanAllan Only the year?

What about yy instead of yyyy?

Eg: 2009 = '09

1938 = '38

Jonathan Allan

@TheBitByte you get given a year (int), a sign (string), and a day-of-sign (int); then you output a day-of-month (int) and a year (int)

trichoplax

@JonathanAllan Oh I see. The year is the calendar year, not the year in which the relevant Zodiac period started (I had assumed Knuth was born in 1939 based on the Capricorn period starting mid December 1938). That's probably worth making explicit otherwise half the readers will get a different impression

TheBitByte

19:31

@JonathanAllan Okay. About the leap year, add an explicit definition.

Jonathan Allan

@trichoplax yes you are given the year they were born - where is it unclear exactly?

TùxCräftîñg

pastebin.com/0JKMVfz6

¯\_(ツ)_/¯

TheBitByte

@TùxCräftîñg Pastebin pls.

TùxCräftîñg

sry

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

Simulate World's smallest universal Turing machine popularity-conteststringarray-manipulation Goal: to implement world smallest automata which was proved (though, not strictly) to be able to simulate any other universal Turing machine, Wolfram's 2-state 3-symbol Turing machine & prove your l...

trichoplax

19:34

@JonathanAllan I thought part of the challenge was that Capricorn starts mid December, so that the 20th of Capricorn 1937 rolls over into 1938, being equivalent to 10th Jan 1938.

Jonathan Allan

@trichoplax it still is part of the challenge as 13 is not a valid month output

...or 0

GLASSIC

I'm posting my sandboxed question tommorow or so . I doubt if it's good to post it as popularity contest, should i change it to code golf?

trichoplax

@JonathanAllan I get that - I think it's a good challenge either way. It's just some people might read it the way I thought if not explicitly stated, and then their calculations will be one year out in some cases

TùxCräftîñg

restricting the operators to +-*/% make the tree search a lot faster

Jonathan Allan

@trichoplax I should add "calendar year" to the input spec then?

Conor O'Brien

19:38

@TùxCräftîñg that makes sense

TùxCräftîñg

but expressions over 60 are really slow to calculate

trichoplax

→ 3 messages moved to Numbers from 5

→ 2 messages moved to Numbers from 5

@TùxCräftîñg it's too much now. I've moved your latest code blocks to a new room, and made you the owner of it

TùxCräftîñg

k

sry

trichoplax

I don't want to stop you discussing it - and anyone else who wants to join in can find it here:

chat.stackexchange.com/rooms/44881/numbers-from-5

(Feel free to change the name to something better...)

zyabin101

I'll abstain, thanks.

Helka Homba

19:42

@trichoplax as in 6, 7, 8, 9, etc. ?

flawr

@trichoplax Numbers from 101

trichoplax

@HelkaHomba Yeah, it really could do with a better name :P

Downgoat

I am aghast at how many people have put their mysql database root password on github ._____.

seshoumara

anyone know how to reverse the entire stack in dc?

Conor O'Brien

@seshoumara carefully?

TùxCräftîñg

19:50

>_<

Jonathan Allan

@trichoplax OK edited to add leap year definition and to specify the first input as "Their (calendar) year of birth (an integer)". I also made the output of "The day of their birth (an integer)" more specific too: "The day of the month on which they were born (an integer)"

seshoumara

@ConorO'Brien what do you mean?

Conor O'Brien

you don't want to do it too fast, you might break something

TùxCräftîñg

Q: how to do x?
A: carefully.

it's always like this in TNB

seshoumara

that's like a star trek joke reply when asked how is the Heisenberg compensator for the teleportation device working?

Downgoat

19:53

@TùxCräftîñg its beacuse we like to be catious so we don't bork anything

seshoumara

A: it works just fine, thank you

Conor O'Brien

@TùxCräftîñg s/TNB/my mind/

trichoplax

@JonathanAllan I had a think about what I said about the ambiguity with the year, and I suspect it may just be me, and it may be obvious to everyone else that it means the calendar year, and not the year in which the Zodiac period began. I can't guess, so maybe it's worth just asking a few people which way they read it?

seshoumara

but really, I need this, does anyone know how to reverse the whole stack in dc?

TùxCräftîñg

brb rebooting computer

Jonathan Allan

19:56

Anyone else care to read the proposed question and tell me if they find it clear?

1

A: Sandbox for Proposed Challenges

When is their birthday? Donald Knuth was born in 1938, on the 20th day of Capricorn. The first day of Capricorn is the 22nd December. Donald Knuth was born on the 10th of January. The challenge Write a program or function which takes three inputs about a person (any other specified order is ...

TùxCräftîñg

back on my ubuntu computer[citation-needed]

βετѧ Λєҫαγ

@JonathanAllan I find it clear

Jonathan Allan

@βετѧΛєҫαγ thanks for the feedback!

Helka Homba

I would do (or have done) these things - strawpoll.me/11147232

TùxCräftîñg

@anyonewhoknowhowtoi3 how to open a application without passing by the terminal?

βετѧ Λєҫαγ

20:02

@HelkaHomba Where's Orbital Skydiving?

Jonathan Allan

@HelkaHomba you missed "none of the above" - I cannot vote

seshoumara

I've seen answers in dc saying: well the input characters are expected to be already on the stack. Which is fine, dc's way of emulating the function concept, but the user is unaware of what that entails. For Hello, World! he needs to enter this:[!][d][l][r][o][W][ ][,][o][l][l][e][H].

So I at least want the user to enter it in the same order as written and then I would need a dc script to reverse myself the entire stack. No one?

muddyfish

@HelkaHomba None of the above

TùxCräftîñg

nvm found how to dmenu

back on my real computer

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

Bitflip and negate code-golf Given an integer, output an expression that produces it from 0 by repeatedly applying unary negation - and bitwise complement ~ (~n = -n-1) ... -3 = ~-~-~-0 -2 = ~-~-0 -1 = ~-0 0 = 0 1 = -~0 2 = -~-~0 3 = -~-~-~0 ... Your expression must be as short as...

βετѧ Λєҫαγ

20:23

@TùxCräftîñg I thought BF had number literals...

TùxCräftîñg

?

10 is a comment for example

βετѧ Λєҫαγ

Oh I see

TùxCräftîñg

someone know a ruby image processing library?

βετѧ Λєҫαγ

Is +++++ not an unary loteral for 5 though?

TùxCräftîñg

it's unclear what is a literal in BF

DLosc

20:28

@βετѧΛєҫαγ No more than hhhhh0 is a unary literal in Pyth.

Note, for example, that if the current cell doesn't start with a value of 0, +++++ will not produce 5 in BF.

It would be more accurate to say +++++ is a code snippet for +5.

trichoplax

@HelkaHomba The highest voted is skydiving, presumably because it has the fewest bytes

TùxCräftîñg

who modified the graphics of my game ಠ_ಠಠ_ಠಠ_ಠಠ_ಠ

βετѧ Λєҫαγ

@TùxCräftîñg FWIW, how does an empty BF program answer the challenge?

TùxCräftîñg

a empty program not really, a cat program is better to it

DLosc

RFC: The chess tag wiki says "for challenges related to chess or any derivative of it." This wording technically excludes games like Xiangqi or "Chinese chess," which are part of the same family but aren't "derivatives." What do you think about changing the wording to "challenges related to chess or any similar game"?

(Is that too broad? What are some games that are vaguely chess-like but should not have the chess tag?)

trichoplax

20:33

I would expect that people who are interested in chess challenges might also be interested in similar games, but would it then be better to change the tag name altogether? This might be worth a meta post

βετѧ Λєҫαγ

:32097211 What's a top network asker?

TheBitByte

@βετѧΛєҫαγ I think it's when you're frequently right on top or close in the hot network questions page.

βετѧ Λєҫαγ

@TheBitByte Oh, how did you find out?

TheBitByte

@βετѧΛєҫαγ From the hot network questions page.

I've learned to choose my challenges carefully after the first rate limit expired.

trichoplax

A big improvement!

TheBitByte

20:42

Thanks!

There's no secret recipe: Just make your challenge interesting, not trivial, and somewhat unique. You'll find multiple ideas that fit this definition. Pick the best one in your head, and post it in the sandbox.

Wait 2 to 3 days, nitpick your own question multiple times until you get really bored, wait for feedback, and mayb* you're good to go, or maybe not, depends on the challenge.

2

And, get inspiration. I took one of TùxCräftîñg's chat messages, and from one word, I made a challenge. You can do it too.

Releasing Helium Nuclei

hai i iz back

Downgoat

@ReleasingHeliumNuclei hai .o/

Conor O'Brien

salut

TheBitByte

Como estas!

Nathan Merrill

lol, somebody downvoted one of my posts exactly a month ago, and today they undownvoted it

Releasing Helium Nuclei

20:50

wow

TheBitByte

@NathanMerrill How do you know the name of voters?

flawr

@TheBitByte Voting is anonymous, why do you think he knows who it was?

Nathan Merrill

I don't. But I got the +2 today, and the post only had 1 downvote, so I only had to look in my rep history

TheBitByte

@flawr He might have used the wrong wording.

Steven H.

what happened here? O_O

Adnan

20:57

pls

Releasing Helium Nuclei

y u haz so much deps telegram :|

DJMcMayhem

@ReleasingHeliumNuclei What WM are you using?

Releasing Helium Nuclei

@DJMcMayhem i3

DJMcMayhem

Oh nice

Syxer

Anybody really good at logarithms?

New Main Posts

20:59

2

Q: Invalid Invali Inval

This idea is loosely based upon @TùxCräftîñg's chat message. Take a look at the below example sequence: INVALID0, INVALID2 INVALID3, INVALID4... INVALID9 After INVALID9, it goes on like this: INVALI0, INVALI1, INVALI2, INVALI3... INVALI9 And after INVALI9, it's like this: INVAL0,INVAL1, INV...

trichoplax

@Syxer I don't know how good your task requires - what are you trying to do?

Syxer

@trichoplax I'm trying to subtract one logarithm from another, but they have different bases.

trichoplax

Is it acceptable to convert the second into the same base as the first?

Syxer

I'm attempting to put them together or nullify them to allow me to solve for x.

Conor O'Brien

so, log_x(b) - log_y(c)?

Syxer

21:02

@trichoplax Yes, but I don't see how that would help.

@ConorO'Brien Yes

Except I can make b and c equal if I split up log_x

Actually that helps

holy crap

Releasing Helium Nuclei

lol

Syxer

mind blown

trichoplax

@Syxer I think that gives you the answer to your first question - I'm not good enough at logarithms ;)

Syxer

@trichoplax You're right, though - I can make them have the same bases and contents, then solve.

@ConorO'Brien @trichoplax Thank youuuuu!

Conor O'Brien

no problem! though I didn't help much

trichoplax

21:04

Glad it worked out, even if I'm not sure why yet :)

Releasing Helium Nuclei

holy shit that happened to me before

Well, *I* think I'm real. Look at me. Look at my face. Cut me and I'll bleed. What more do you want? Please don't go.

2

Syxer

@trichoplax I'll show you the work when I finish, if you like. :)

trichoplax

Thanks :)

Conor O'Brien

@ReleasingHeliumNuclei please don't wake up I don't want to die

Releasing Helium Nuclei

What if I am actually in a coma and this riddle I see in my dreams is a hint from the real world... oO — dounyy Mar 9 at 8:05

DJMcMayhem

21:10

@TheBitByte Something like supporting spaces is pretty important. You should have said that before getting 5 answers.

trichoplax

CMC: How many SE chatrooms currently post every new xkcd on a feed?

Releasing Helium Nuclei

@trichoplax at least 2, "$this" and "xkcd"

trichoplax

@ReleasingHeliumNuclei This one only has them posted by humans - we don't have a feed bot to do it...

I have a feeling there's more than 1 though...

Adnan

@Dennis Could you please pull 05AB1E and Oasis?

Conor O'Brien

but not 2sable?

Releasing Helium Nuclei

21:15

also, sandbox has the xkcd bot too i think

ooh my internet iz borked

iz back

Adnan

@ConorO'Brien nope

2sable is like the ugly duckling of the golfing family

Releasing Helium Nuclei

i've just discovered a game: Flexbox Defense

Syxer

Sorry if that's too grainy

If you're curious as to the original question: The task is to find the largest number for which the representation in base 7 is double that of its representation in base 10.

And prove it.

I think I'm about halfway there. :)

DJMcMayhem

WTH? Who downvoted this?

0

A: Invalid Invali Inval

V, 20 bytes A0òYpó.10/0/e $hòd Try it online! Since this contains unprintable characters, here is the readable format: A0<esc>òYp<C-a>ó.10/0/e $hòd And here is a hexdump: 0000000: 4130 1bf2 5970 01f3 2e31 302f 302f 650a A0..Yp...10/0/e. 0000010: 2468 f264 $...

trichoplax

Do you want the inequality in terms of log(x), or is it worth raising 10 to the power of all 3 sides?

@DJMcMayhem Maybe it's because your language name is shaped like a downvote? Sometimes there's no meaningful reason...

Syxer

21:23

@trichoplax I'ma raise in the next page (it's bound to become messy)

trichoplax

Good thinking

Syxer

@trichoplax subliminal messaging

kk gotta leave the computer for now.

bai allll

Adnan

bye

Syxer

Thanks for all the ><>

Downgoat

@DJMcMayhem fixed

DJMcMayhem

21:24

@trichoplax BRB, changing name to ~~carrot~~ caret

trichoplax

;)

DJMcMayhem

It's just unexpected since answer downvotes are fairly rare on this site.

Downgoat

@Syxer ;_; it was this reason i have had to set my chat profile to "please don't Downgoat my posts ;_;"

flawr

@trichoplax These seem to be your favourites recently?

trichoplax

@flawr ;) and :P ?

Releasing Helium Nuclei

21:27

Silicon Valley S03E06 Spaces vs Tabs Vim vs Emacs (Richard and the facebook chick fights)

►

lol

trichoplax

@flawr Generally :) for happiness and :P for indicating or acknowledging a joke, but occasionally ;) creeps in for variety

Conor O'Brien

@ReleasingHeliumNuclei is that a TV show?

Releasing Helium Nuclei

@ConorO'Brien silicon valley, as it says on the title of the video :P

Downgoat

@ReleasingHeliumNuclei how to downvote that guy. he uses tabs and emacs. he might as well be the devil himself

Conor O'Brien

@Downgoat I thought you liked tabs?

trichoplax

21:32

None of us really care about tabs or spaces. We just say whichever one is funny at the time

3

flawr

I just googled some info on stepper motors. And on in the specs of one of those I found the torque given in ounce inches. Why would anyone do that?

Releasing Helium Nuclei

@trichoplax i do ._.

DLosc

@ReleasingHeliumNuclei Me on level 4: justify-content but align-items whyyyy :(

trichoplax

@ReleasingHeliumNuclei I know. I was joking. Tabs are evil

2

Downgoat

@ConorO'Brien ^^^^^

Conor O'Brien

21:33

@trichoplax Same. I actually use both in the same project, often on the same line! \t \t\t print 3

Releasing Helium Nuclei

@DLosc w3c.org ask them

trichoplax

@ConorO'Brien OK that's beyond a joke

DJMcMayhem

@trichoplax but hitting the space bar 8 times is almost worse

Conor O'Brien

@trichoplax who's joking? ;)

trichoplax

@DJMcMayhem I just press the tab button twice, and it inserts 8 spaces...

DLosc

21:34

^

Releasing Helium Nuclei

^^

DJMcMayhem

Why would you indent to 8? Not to start a flame war or anything

What language are you using?

flawr

@DJMcMayhem English

trichoplax

@DJMcMayhem What?? You said "hitting the space bar 8 times", and I was just responding to that... :P

I obviously wouldn't indent to a composite number of spaces. That's just asking for confusion

DJMcMayhem

@trichoplax oh, she was hitting space 8 times in the video

trichoplax

21:37

There's a video?

El'endia Starman

@ReleasingHeliumNuclei I like this game.

Releasing Helium Nuclei

two levels of indentation?

anyone else wants a parent selector on CSS? ._.

DJMcMayhem

@trichoplax yeah, the one we're all talking about?

trichoplax

Guess I should watch it then for context. Wow. Homework from chat...

DJMcMayhem

I use two spaces for vimscript, bash and Ruby, and four for everything else. (C/C++, C#, python, etc.)

I guess two for HTML also

Releasing Helium Nuclei

21:40

saem :O

DJMcMayhem

O:

no wae

trichoplax

I use 4 spaces in python programs, but 8 in the shell as that's what it does for me

Conor O'Brien

I use tabs in atom, 4 spaces in n++, and 2 spaces in notepad

Downgoat

@DJMcMayhem cat in hat has hooves confirmed?

H Walters

12 space indentation is perfect

trichoplax

21:46

You mean 6...?

H Walters

That's perfect too

Releasing Helium Nuclei

use 80 space indentation, dont let punch card users use ur code

H Walters

Bah, wait, 12 isn't perfect

trichoplax

Seriously though, use a prime number of spaces for indentation or your code will be ambiguous

DLosc

@ReleasingHeliumNuclei This game is starting to remind me of youtu.be/dK_OKGELcn0?t=2m11s

Releasing Helium Nuclei

21:48

@trichoplax 2!

trichoplax

:)

You can omit the ! since 2 factorial = 2 :P

Releasing Helium Nuclei

:/

H Walters

@trichoplax sounds like what you really want is tabs, and an editor that sets the tab width to an irrational number of spaces.

Conor O'Brien

my tab width is four zero-width spaces

trichoplax

@HWalters That does sound ideal

@ConorO'Brien I honestly can't tell with you :P

Conor O'Brien

21:52

¯\_(ツ)_/¯

DJMcMayhem

@trichoplax I'm not sure I get your reasoning. Don't they just have to be distinct?

Even if one is a factor of another

trichoplax

You mean you change the number of spaces per indent depending on how many times you indent?

DJMcMayhem

No, just each total number of spaces is distinct

Like, 2, 4, 6, 8 is not ambiguous at all

trichoplax

With 8 space indentation, how can you be sure it isn't 4 space indentation indented twice, or 2 space indentation indented 4 times? But with 7 space indentation you can be sure it's only indented once

Using a prime number avoids having to look around at nearby rows for context

In case it isn't obvious, I'd like to point out that I'm not serious

DJMcMayhem

@trichoplax Mind if I turn that into a challenge?

trichoplax

22:01

What? My crazy prime tabbing idea?

DJMcMayhem

Yup

trichoplax

I can't imagine how it would convert into a challenge, but if you can, go for it :)

Just don't credit me - I don't want to be blamed if that kind of thing ever makes its way into production code :P

H Walters

@DJMcMayhem Just be sure to mention in the post that trichoplax had nothing to do with it

Conor O'Brien

XD

trichoplax

Ha ha

Wow. No submissions:

12

Q: Counting Cunningham chains

Prime numbers have always fascinated people. 2300 years ago Euclid wrote in his "Elements" A prime number is that which is measured by a unit alone. which means that a prime is only divisible by 1 (or by itself). People have always looked for relations between prime numbers, and have come ...

code-golf primes

Just realised Euclid's definition makes it sound like 1 is prime

This challenge reminds me of primecoin

DanTheMan

22:12

@trichoplax Primecoin?

trichoplax

Primecoin

Primecoin (sign: Ψ; code: XPM) is a peer-to-peer open source cryptocurrency that implements a unique scientific computing proof-of-work system. Primecoin's proof-of-work system searches for chains of prime numbers. Primecoin was created by a person or group of people who use the pseudonym Sunny King. This entity is also related with the cryptocurrency Peercoin. The Primecoin source code is copyrighted by a person or group called “Primecoin Developers”, and distributed under a conditional MIT/X11 software license. Primecoin has been described as the main cause of spot shortages of dedicated servers...

DLosc

@trichoplax To be pedantic: you still can't distinguish 2 indents in 7-space indentation from 7 indents in 2-space indentation. Any instance of multiple indents will have a composite number of spaces. The solution, of course, is a language that doesn't use more than one level of indentation. :P

trichoplax

@DanTheMan Mining the coin involved finding Cunningham chains, just like in the challenge

DJMcMayhem

@DLosc I think he was saying each level of indentation is a prime. e.g. 2, 3, 5, 7, 11, 13 rather than multiples of a prime.

H Walters

I don't know... how do you know 7 spaces represent one indentation, and not two 3.5 space indentations?

trichoplax

22:14

@DJMcMayhem I wasn't - so my system was subject to @DLosc 's stated flaw, but that does sound like an excellent remedy...

DJMcMayhem

Oh, that's what I thought you meant.

Wait, if that's not what you meant, you could just use 2! 2 is prime

DanTheMan

@HWalters I'm pretty sure there is a half width space in Unicode

trichoplax

@DJMcMayhem You overestimated me :P

H Walters

@DanTheMan I was suggesting earlier irrational tab stops

DJMcMayhem

My new proposal: Indent to Pi spaces.

DLosc

22:16

@DJMcMayhem It depends what you're trying to distinguish it from. If you want to distinguish from all multiplicative systems, the each-level-a-different-prime system still falls short. Is 10 spaces 3 prime levels, or 5 levels of 2-space indents?

TL;DR: We're all doomed.

2

DJMcMayhem

@DLosc No, cause you'll never have 10 spaces.

Because 10 isn't prime

DLosc

@DJMcMayhem Ohh, now I get it.

trichoplax

So you don't add 2 spaces, then 3 spaces, then 5, to give 10, but use the primes as the total indentation?

DJMcMayhem

Exactly.

DanTheMan

@DJMcMayhem Yeah it is. In binary. Duh.

DLosc

22:18

@DanTheMan Also in ternary... or base 5... or...

flawr

DJMcMayhem

Base is irrelevant to factorization

DLosc

@trichoplax I guess then the only weakness is if you find someone using 3 or 5 spaces per tab, in which case you couldn't tell 1 level of their indentation from 2 or 3 levels of prime indentation.

But I don't know anyone who does that.

TùxCräftîñg

halp

how to pass varargs in ruby

trichoplax

Perhaps just to be on the safe side, we should use braces

TùxCräftîñg

22:20

in python i can f(*[1, 2, 3])

but in ruby idk

DJMcMayhem

@trichoplax Which brings up an interesting question: Which sums of the first n prime numbers are also prime?

DLosc

@trichoplax Sign on the wall of my undergrad's compsci tutoring lab: "Curly braces are your friends."

DanTheMan

@TùxCräftîñg Like f(...[1,2,3]) in Javascript?

TùxCräftîñg

yes

DJMcMayhem

oeis.org/A013916

trichoplax

22:22

@DJMcMayhem Ooh - that creates an infinite binary string. Which makes a constant if you put a decimal point in front of it. I wonder what the constant is?

DJMcMayhem

@trichoplax The first 100 digits: 1101010000010100000000000000000000000000000000000000000000010001000000000000000‌000000000000000010001

But how would you convert that to a floating point number?

trichoplax

Put 0. in front of it, and read it as a binary number

Dennis

@Adnan Done and done.

trichoplax

0.1 is 1/2, 0.11 is 3/4

DJMcMayhem

What language can do that?

trichoplax

22:25

I don't know one that has a builtin, but it's just a matter of calculating 1/2 times the first digit plus 1/4 times the second, plus 1/8 times the third...

DanTheMan

@TùxCräftîñg f(*[1,2,3]) should work in ruby.

TùxCräftîñg

oh thx

DanTheMan

Relevant link: phrogz.net/programmingruby/tut_methods.html

@trichoplax Mathematica probably has one

trichoplax

Well yes :)

DJMcMayhem

 def foo(s):
    n = 0.0
    factor = 0.5
    for c in s:
        if c == '1':
            n += factor
        factor /= 2
    return n

print(foo("1101010000010100000000000000000000000000000000000000000000010001000000000000000000000000000000010001"))

@trichoplax

The result is 0.82843017578125 for the first 100 digits

DanTheMan

22:30

Unfortunately parseFloat in Javascript doesn't have a base argument like parseInt

DJMcMayhem

There's the answer, now I have no idea what to do with this information

TùxCräftîñg

»  cat hello.gs
10 \print [] \to_d \begin 10 \print
Elie@elie-asus — /d/GeneralStack
»  ruby generalstack.rb hello.gs
10
generalstack.rb:81:in `block in run_': undefined method `call' for nil:NilClass (NoMethodError)
        from generalstack.rb:74:in `each'
        from generalstack.rb:74:in `run_'
        from generalstack.rb:103:in `run'
        from generalstack.rb:108:in `<main>'

i should really stop to add self-destruction commands to my languages

Eᴀsᴛᴇʀʟʏ Iʀᴋ

Hallo.

TùxCräftîñg

.ollaH

DJMcMayhem

Hai

Downgoat

22:33

@TùxCräftîñg that might be good idea ._.

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

Hello World Reborn Again & Again The premise of this challenge is simple: You are to print the text "Hello, World!" 10 times, using a different method to print each one. The program with the fewest bytes wins. You could use any syntax change (like in Python, print'Hello, World!' then print"Hell...

New Main Posts

2

Q: Slowly turn a string into another

The Challenge Given two strings/an array of strings, output the first string slowly shrinking and expanding back into the second string. You can assume the strings will always start with the same character. Example Input: "Test", "Testing" Output: Test Tes Te T Te Tes Test Testi Testin Testi...

code-golf string

trichoplax

@DJMcMayhem I make it the same

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@NewSandboxedPosts closed as unclear, also most likely a dupe.

TùxCräftîñg

print"Hello, World!"
print "Hello, World!"
print  "Hello, World!"
etc...

Eᴀsᴛᴇʀʟʏ Iʀᴋ

22:41

Yeah

As it stands, you can just pad the code with no-ops.

TùxCräftîñg

night golfers

H Walters

#define A(x) #x, main(){puts(A(B)A(C));}, compile with -DB=H -DC="ello, World!", ...

trichoplax

@EᴀsᴛᴇʀʟʏIʀᴋ I guess if you can find 10 different ways all the same length then you can beat someone who pads

DJMcMayhem

I just hit 12K! \o/

4

flawr

HALF LIFE 3 CONFIRMED

2

(not virtual reality, but real reality)

trichoplax

22:47

@DJMcMayhem I don't know if it would make a good challenge, but the constant only ever increases as you add more binary digits, and the amount that it can increase by with the remaining infinite number of digits is always bounded, with the bound decreasing each digit, so it's possible to say for certain when a given decimal place is no longer going to change

DJMcMayhem

I do the same little CMC (Chat Mini Celebration) every 1K.

Steven H.

\o/ congrats

βετѧ Λєҫαγ

@flawr What the hell happened there :O

DJMcMayhem

@trichoplax Wouldn't it converge on something? Since the amount it's increasing is going exponentially down

flawr

@βετѧΛєҫαγ A gravity gun happened, probably.

DJMcMayhem

22:53

> We don't go to Ravenholm...

trichoplax

@DJMcMayhem Yes exactly. And it will be fairly straightforward to say which decimal places have already finished converging, if you wanted a challenge to calculate a given decimal place

DJMcMayhem

I still get chills thinking about that level

@trichoplax How would you determine if a decimal place has finished converging or not? I understand conceptually why you could say that, but I don't know how to actually use that

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@trichoplax true

trichoplax

After one binary digit, you know the remaining increase cannot be more than 0.5. After 2 binary digits, you know the remaining increase cannot be more than 0.25. After n binary digits, you know the remaining increase cannot be more than 1/2^n

So after 10 binary digits, the decimal result is 0.828125, and the remaining increase cannot be more than 1/2^10=0.0009765625.

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