The Nineteenth Byte

Alex A.

03:00

So there's an implementation of Ruby called Topaz that's written in Python.

Sounds blazing fast. </sarcasm>

quintopia

ah. so it gets speed from concurrency?

Anonymous

@quintopia Yep

Anonymous

@AlexA. Everything takes 420 microseconds to complete

Alex A.

haha

feersum

@Mego Are you sure about that?

That sounds completely ridiculous.

Splitting tiny amounts of work among threads and having to lock everywhere sounds very slow.

Anonymous

03:01

@feersum Stackless mode isn't the default, but it has support for it. Click the link and be enlightened.

feersum

What link?

Anonymous

Scroll up

Anonymous

More specifics: stackless.readthedocs.org/en/latest/stackless-python.html

feersum

> Dear visitor, due to technical problems, the Stackless website is currently almost completely down.

Anonymous

That's why I linked the RTD

feersum

03:05

They don't promise to speed up code.

Alex A.

They do. They also promise a brand new car with every purchase of $10 or more.

feersum

The goal seems to be to enable a different programming style with unlimited recursion and or continuations.

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

Resolving the Date Format Dispute The formatting order of dates is one of the most complex and divisive issues the world faces today. Some of us vehemently argue that Month/Day/Year is appropriate, considering that's how we say dates out loud. Others loudly proclaim that Day/Month/Year is best, ...

Dennis

@AlexA. (⊣+6×⊢)/⌽5∘, should do the trick.

Alex A.

@Dennis What in the world

Anonymous

03:09

@feersum Which, if used properly, will likely speed up code that would normally require ugly, inefficient hacks to work in CPython

Doorknob

Very off-topic (but then again, this is 19th byte): I've been thinking of getting an e-reader lately. Anyone have any recommendations?

Anonymous

You're right, Stackless doesn't promise to speed up code. It's a happy accident.

Alex A.

@Doorknob Books

Dennis

Or (⊣+6×⊢)/∘⌽5∘,, if you need a function.

Doorknob

haha

Anonymous

03:09

@Doorknob Get one with an IRC client

Thomas Kwa

Chat mini-challenge: Given a number of minutes past midnight, output the total number of segments lit when the number is displayed on a 24-hour seven-segment display in the format "HH:MM". The number of lit segments for digits 0123456789 are 6255456376 respectively. Don't count the colon.

feersum

@Mego Yeah ok. I forgot what I was arguing about now lol

Doorknob

@ThomasKwa Is this inspired by the winterbash counter? :P

Geobits

Get a Kindle. Out of the few I've tried (Kindle, Nook, whatever Sony tried), it was the best by far.

Thomas Kwa

@Doorknob Maybe subconsciously

Doorknob

03:11

in Tavern on the Meta on Meta Stack Exchange Chat, 3 hours ago, by Normal Human

For completeness: 0 = 1110111, 1 = 0010010, 2 = 1011101, 3 = 1011011, 4 = 0111010, 5 = 1101011, 6 = 1101111, 7 = 1010010, 8 = 1111111, 9 = 1111011

Anonymous

@ThomasKwa vote to close as duplicate of codegolf.stackexchange.com/questions/65106/…

Doorknob

in Tavern on the Meta on Meta Stack Exchange Chat, 3 hours ago, by Normal Human

The entire algorithm of running-people countdown is this neat js file, where the aforementioned array encodes the digits that people form.

Dennis

@AlexA. 5∘, prepends 5 to the array and ⌽ reverses it. Then, we reduce (from right to left) using (⊣+6×⊢), i.e., multiply right element by 6 and add to left element.

Thomas Kwa

@Mego definitely not a duplicate of that

Anonymous

@ThomasKwa There are two parts to the challenge: converting minutes to hours and minutes, and summing 4 values in a lookup table

Doorknob

03:13

@Geobits Thanks; why do you say that? What makes it better than the other things?

Alex A.

@ThomasKwa That's what they all say :P

Anonymous

The first one is exactly the linked challenge

Anonymous

And the second part is trivial

Thomas Kwa

@Mego the other challenge was half string-manipulation

Geobits

@Doorknob Page contrast, overall weight/feel, battery life, access to Amazon.

(in roughly that order)

Anonymous

03:14

@ThomasKwa 90% of challenges are half string-manipulation

Anonymous

The core of the challenge is the same

Thomas Kwa

and the LUT part is no more trivial than the time-to-hours-and-minutes part.

Anonymous

Answers to the main challenge would be competitive in the chat challenge with minor alterations

Anonymous

i.e. dupe

Thomas Kwa

I don't think every language would implement a LUT the same way.

quintopia

03:15

@Mego ^

Thomas Kwa

True, it's easy, but it might not be trivial to find the shortest.

Alex A.

@Dennis Why is 5 compose ravel the way to get 5 on the front? o_O

quintopia

no, of course not. in python it'd probably be indexing those strings exactly. but it's still not interesting

Dennis

@AlexA. Back. / reduces from right to left.

Anonymous

Here's a Python 3 answer from the main challenge: i,j=divmod(int(input()[:3]),60);print(str(i),"hour"+("s"if i-1else""),str(j),"minute"+("s"if j-1else""))

Alex A.

03:18

@Dennis Couldn't you reduce with \ and swap + and *, then drop the reverse?

Dennis

\ is cumulative reduce, and still reduces from right to left.

Alex A.

Oh right

Thanks for your help!

Anonymous

H,h,M,m=map(lambda x:divmod(x,10),divmod(int(input()),60));print(sum(map(int,map('6255456376',H,h,M‌,m))))

Anonymous

Not a huge change to solve that problem

Geobits

Huh, someone's going on a Taisho-flagging spree.

Anonymous

03:20

(also I'm sure it's horribly golfed)

Anonymous

@Geobits ?

Doorknob

Well that's the most flags I've ever seen at once

Dennis

@AlexA. 6⊥5∘, is shorter though.

(stupid internet)

Geobits

chat.stackexchange.com/users/116952

quintopia

And here is the adaptation to this problem: i,j=divmod(int(input()),60);o=0;j=100*i+j;for i in1,2,3,4:o+=int("6255456376"[i%10]);i//=10

or something like that

SuperJedi224

03:26

Bye guys

quintopia

@Mego I'm disappoint you didn't translate it to Seriously first

Dennis

Is chat unborken now?

Alex A.

> I'm disappoint

Anonymous

@quintopia 2lazy4me

Thomas Kwa

@Mego Although I think there's a better way to LUT, that sounds reasonable.

quintopia

03:31

@AlexA. Is internet slang not accepted here

Thomas Kwa

Also, I don't know why I got all defensive (it's not even an actual challenge)...stupid human brain

Alex A.

@ThomasKwa <3

Anonymous

@AlexA. I thought you <3'd me ;_;

Alex A.

I do

It's a <3 triangle

Dennis

I finally switched my last computer from Fedora to openSUSE today. Had enough of its crap.

Alex A.

03:33

To reduce crap you switched to openSUSE? :P

Dennis

Parts of Fedora seemed to break at random occasions. This morning, I could only open applications by executing DISPLAY=:0 whatever in another virtual terminal.

And openSUSE is the awesomest OS there is, thank you very much.

Alex A.

s/openSUSE/Mac OS X/

Geobits

^ Boo this man

Dennis

Stop trying to feed me half-eaten fruit!

Alex A.

It's such tasty fruit though...

Dennis

03:38

2

^ Not good. Not tasty.

Alex A.

That's not what I'm trying to get you to eat. :P

VisualMelon

hmm

Alex A.

quintopia

ew. why would anyone make delicious chocolate cake look so ugly and unappetizing?

Alex A.

ಠ_ಠ

Dennis

03:41

LOL. Wanna bet how many Toshiba cakes are out there?

Geobits

Very minimalistic. Not very thin for an iPad, though.

Dennis

iCake

Alex A.

@Geobits It's not an iPad, it's a cake.

Geobits

It's a lie.

Dennis

The iPad is a lie!

Alex A.

03:43

Actually I'm fairly certain it's supposed to be a closed MacBook, not an iPad.

Geobits

And it fails at both, since neither have chocolate in the middle.

(I think)

quintopia

you mean

succeeds where they fail

Alex A.

Idk man. Chocolate cake is kind of bad anyway.

Geobits

alex-is-wrong

Seriously.

What kind of person doesn't like chocolate cake?

Alex A.

I mean, it's alright sometimes.

But more often than not it's bad.

Dennis

03:46

alex-has-never-been-wronger

7

Alex A.

I just don't like chocolate that much.

Geobits

^ That doesn't help your case... :P

Alex A.

u_u

El'endia Starman

I don't like chocolate cake either.

Alex A.

starman-is-wrong

El'endia Starman

03:48

In fact, pretty much the only things chocolate that I actually like are milk chocolate and chocolate frosting.

@AlexA. This one time, it's worth being wrong. :P

Alex A.

Oh gross. I like the inner cake part but I hate frosting.

Geobits

O_O

Alex A.

I also hate milk chocolate.

I'd be fine eating a bare chocolate cake with no frosting.

quintopia

well, less wrong now. the inside part is usually the best.

Alex A.

That sounds alright.

El'endia Starman

03:49

I've never even tried chocolate milk, though I drink LOTS of normal milk every day.

Doorknob

Chocolate is yummy, but I don't consider it to be exceptionally delicious. :P

Alex A.

The only way I can eat a chocolate bar if it's >90% cocoa. Otherwise it's too sweet.

Geobits

@Doorknob Kids these days...

Dennis

I could eat the frosting without the cake. The proper frosting, that is.

TanMath

@Mego I golfed the code

Alex A.

03:51

@Dennis Golly, mister. That sounds unpleasant, in my humble opinion. Shrug!

Geobits

Cream cheese frosting is great by itself. I mean, it's good on a cake, too, but...

Anonymous

if m%2!=0>1

Anonymous

What the hell is that

7

TanMath

@Mego it works!

El'endia Starman

@TanMath It's equivalent to if m%2 != 0 and 0 > 1.

Anonymous

03:54

You dropped 6 bytes. It still isn't close to fully golfed

Anonymous

You can easily get sub-200

TanMath

@El'endiaStarman you sure? It works but

Wait

El'endia Starman

Even if it's actually equivalent to if (m%2 != 0) > 1, that's still always false.

Anonymous

Oh I see

Anonymous

0>1 == False == 0

Anonymous

03:55

Which is an unusual way of doing m%2!=0

Anonymous

Which is an unusual way of doing m%2>0, which is an unusual way of doing m%2

TanMath

Nvm

Anonymous

@AlexA. Really it's still my original code, just with a little bit of golfing and bugfixing :P

Anonymous

But yeah

Anonymous

s/dumb/unusual/g

Anonymous

03:59

I would edit it to be nicer, but I'm past the edit timeout :/

quintopia

which code are we talking

VisualMelon

I have that problem in real life - someone needs to sort out the edit timeouts in fluid conversation some time

Alex A.

@Mego ftfy

Anonymous

@AlexA. <3

TanMath

And usually if you know how to golf it, you hint on how to do so, but you do not want to help me..oh well

@quintopia my Bernoulli answer

Anonymous

04:02

@TanMath I'm not going to tell you how to golf your answer to my challenge - that wouldn't be fair to the other people who I didn't help with golfing

4

TanMath

@Mego OK, you have a point, but you could help everyone if you knew how to further golf

Anonymous

@TanMath I don't know how to golf Haskell, or Mathematica, or PARI/GP, or Matlab

TanMath

@Mego OK, so?

Anonymous

@TanMath So I can't help the people who wrote answers in those languages with golfing

TanMath

@Mego You help with whatever languages you know

Anonymous

04:05

I am under no obligation to help anyone with golfing their answers to my challenge

Alex A.

^

TanMath

@Mego OK, but that proves that you do not want to help

Let us not fight over this anymore

Anonymous

@TanMath It proves that I do not have to help

quintopia

@TanMath I'll give you one tip. There is never any great reason to put !=0 in a conditional.

Anonymous

I've already helped plenty - I pointed you to the Python golfing tips thread so you could help yourself

TanMath

04:07

I looked at it, ok?

I could not find anything very helpful

quintopia

@TanMath tip #2: avoid putting multiple returns in the same function. instead return an expression that evaluates to the right number in all circumstances

TanMath

I tried to use a lambda but did not work

@quintopia how?

@quintopia thanks, very helpful

Alex A.

I really feel like eating two donuts

Dennis

With frosting?

Doorknob

@AlexA. You should eat two donuts then

Alex A.

04:13

@Doorknob That would require a lot of things that I don't want to do, including (but not limited to) leaving the house, driving to the store, purchasing donuts, and driving home.

@Dennis mightyo.com

Dennis

Might-yo?

Alex A.

Mighty-O

quintopia

@TanMath Does that first return even do anything that the remaining code doesn't do on its own? it looks like it will return 1 when m is 0 even without that line.

Alex A.

@Dennis It's the only donut place I know of that makes them without eggs or milk. And they're incredible. They won a national donut competition.

TanMath

@quintopia you win...

Calvin's Hobbies

04:24

Why does markdown not render :/

TanMath

I know the next step

TanMath

04:36

Thanks @quintopia

Anonymous

stomps on the crickets

El'endia Starman

+1 they were getting monotonous.

Calvin's Hobbies

@Mego Hack coderpad to give us a longer timeout

Anonymous

@Calvin'sHobbies k

Thomas Kwa

05:09

Well, the Bernoulli numbers challenge is another one that any reasonably-good Mathematica-based golfing languages would have won.

Alex A.

@Calvin'sHobbies

Calvin's Hobbies

4

I like our communal art

(here)

Alex A.

@Calvin'sHobbies Oh hey, the guy's hand isn't anatomically incorrect in yours

quintopia

@Calvin'sHobbies aw you snapped it while the river was still unaligned :/

Calvin's Hobbies

oops

quintopia

05:18

anyway, let's leave this here for now: yourworldoftext.com/calvinshobbiesandfriends

PIN IT

Alex A.

No

quintopia

aw

Alex A.

Pins are for serious things

quintopia

FINE

Anonymous

@AlexA. Like stealth pings and stars

Alex A.

05:22

Exactly

Dennis

OK, I managed to break openSUSE in exactly the same way I had broken Fedora.

Alex A.

@Dennis Did you turn it off while it was doing a software update?

That's how I trashed my openSUSE VM.

PSA: Don't do that.

Dennis

That could trash anything.

Alex A.

Nah.

Dennis

With btrfs, you could just revert to the previous snapshot. openSUSE is cool like that.

Re: my machine. I had done a million things, taking special care not to copy anything from the old configuration. All updates, all settings, done. Reboot. No sound. Can't start apps.

You'll never guess what the culprit was!

Alex A.

05:25

:|

Anonymous

@Dennis CJam?

Alex A.

@Dennis Tabs

Actorclavilis

golfing your init.d scripts? :p

Dennis

So close! I changed my keyboard layout yesterday, to I put a shell script in the Autostart folder to make a couple of modifications:

setxkbmap us intl
xmodmap -e 'keycode 15 = 6 asciicircum onequarter U0302 onequarter dead_circumflex'
xmodmap -e 'keycode 48 = apostrophe quotedbl U0301 U0308 dead_acute dead_diaeresis'
xmodmap -e 'keycode 49 = grave asciitilde U0300 U0303 dead_grave dead_tilde'

Eliminating that script solves all problems.

Alex A.

You changed your keyboard layout? o_O

Dennis

05:28

Yes, from combining diacritics to dead keys.

brb Rebooting.

Alex A.

Oh, okay.

If @Calvin'sHobbies ever makes another sock account, it should be called Calvin's Copies.

Dennis

Giving the autostart script a .sh extension solves the problem.

Argh!!!

Alex A.

This is why you use file extensions!!!!!

(╯°□°）╯︵ ┻━┻

jk ily bb

Anonymous

No you use shebangs

Dennis

Pretty much nothing on my computer has a file extension. That includes the built-in apps. It's the Linux way.

Anonymous

05:30

Otherwise you look at a file of gibberish and wonder, "Seriously, CJam, Pyth, or Golfscript?"

feersum

So you were running as an executable?

Dennis

I have no idea what KDE thought it was.

Alex A.

Probably thought it was some trash temp file since it didn't have an extension.

feersum

Run it again now and find out!

Dennis

GNOME is even cooler. Autostart scripts have to terminate before the desktop loads. So if you have an infinite loop in there, make damn sure it runs in the background.

How? Running it from the command line works as expected.

Hm, it might have thought it was a desktop file. Not sure.

@AlexA. It's not supposed to have an extension. (╯°□°）╯︵ ┻━┻

Alex A.

05:36

Well clearly it is, otherwise you wouldn't be having these issues. :P

Anonymous

use shebangs

feersum

File extensions are golfier!

Alex A.

^

Anonymous

Don't golf your interpreter

Alex A.

Why not? @phase did it and that turned out fine. :P

feersum

05:38

> turned out fine [citation needed]

Calvin's Hobbies

I passed @DigitalTrauma :O

Alex A.

On the highway?

In the supermarket?

Calvin's Hobbies

in rep ._.

Alex A.

Nice :D

Anonymous

> turned out fine [questionable content]

Alex A.

05:41

I finally passed randomra and Geobits in rep. Next up is feersum. >:D

Dennis

@Mego I'm an idiot. I thought I just hadn't copied it here, but I actually forgot to write the shebang. With it I don't need the file extension.

Alex A.

@Dennis ಠ_ಠ

Dennis

I spent an entire day installing and configuring an OS because I forgot a shebang!

Anonymous

@Dennis I told you so

Anonymous

I told you so

Alex A.

05:42

@Dennis This is why you use file extensions to begin with.

Dennis

No clue how that happened.

Anonymous

Anyone know where to get a bunch of newline-separated English sentences?

Calvin's Hobbies

@Mego Insert newlines after periods in a free online book

  __
~/  \~
~\__/~
  ``

@AlexA. What was that ^

feersum

A Hex agony.

Alex A.

@Calvin'sHobbies I have no idea. I didn't make it.

Dennis

05:46

Well, it was for the best. I've been wanting to get rid of Fedora for months, but always was too lazy to actually do it.

Anonymous

@Calvin'sHobbies Too lazy to find a good source

Alien G

Anyone like the tilted squares I'm drawing? XD

quintopia

@Calvin'sHobbies the sun

Calvin's Hobbies

@AlienG huh?

Alien G

yourworldoftext.com/calvinshobbiesandfriends

Alex A.

05:50

@Mego Shakespeare

Anonymous

@AlexA. I said english

Alex A.

It'll be fancy

Anonymous

Shakespeare is to English what Seriously is to programming

Alex A.

Um no not even kind of

Digital Trauma

@Calvin'sHobbies Dammit - that's not the first time you've done this to me ;-)

TanMath

06:01

@Mego no way! but it soon will be!

Check out my updated answer:

-2

A: Bernoulli Numbers

Python 3, 184 225 221 190 bytes This is based on Mego's example implementation, except golfed further. EDIT: Fixed and working now. Just here as a reference since most bytes for Python 3. EDIT: Now beating Sherlock9's answer. Thanks @quintopia! import math from fractions import Fraction as F ...

Thanks @quintopia

@ThomasKwa like what?

Calvin's Hobbies

@TanMath The lines under the function B are not indented

TanMath

@quintopia what is this?

quintopia

@TanMath @Calvin'sHobbies is correct. you didn't indent correctly for the post.

TanMath

fixed

Anonymous

@TanMath I meant the blight upon the second thing, not the prestige

quintopia

06:04

(anyway, yes, it's better, but there are still some bytes to be shaved if you wanted...)

TanMath

@Mego oh...

@quintopia of course I want it!

@quintopia are you hinting to lambdas?

Anonymous

Seriously is a blight upon programming like Shakespeare is a blight upon the English language

quintopia

Shakespeare the programming language I hope?

TanMath

@Mego I do not know why I am wasting my time on this language!

quintopia

I'm quite fond of some of the person's turns of phrase

TanMath

06:06

^ ?

quintopia

@TanMath It's a useful language for running off quick scripts, and golfing in it will help you learn it better

TanMath

@quintopia true, you know it well?

@quintopia problem is it isn't well documented

quintopia

oh you're talking about Seriously?

there's no good reason to learn Seriously.

seriously, quit now.

Anonymous

Except for occasionally winning golfs

quintopia

OCCASIONALLY ONE DAY EVENTUALLY MAYBE WINNING GOLFS

TanMath

06:09

I am never posted a competitive answer for Seriously! too hard!

Gracias to however upvoted (you know who you are)

feersum

By the time you learn it, it will no doubt be obsolete due to the next golfing language.

quintopia

correct me if i'm wrong but isn't (a and b)==(b if a else a)?

TanMath

@quintopia in Python? i do not think so

feersum

@quintopia Yes.

Anonymous

@quintopia Correct

quintopia

06:12

kk

Calvin's Hobbies

@quintopia The and will return a bool, the other one will return whatever a or b is (which has the same bool value)

TanMath

really?

feersum

@Calvin'sHobbies No, it doesn't work liek that in Python.

TanMath

@quintopia oh, i am mistaken

Calvin's Hobbies

@feersum Oh, you're right, the and does the thing anyway

Anonymous

06:14

>>> 2 and 3
3
>>> 3 and 0
0
>>> 0 and 3
0
>>> False and 5
False
>>> "" and 17
''
>>> "foo" and "bar"
'bar'

TanMath

@Mego thank you

one more upvote, and I am at 500! I cannot believe it!

quintopia

likewise we should expect (a or b)==(a if a else b)

TanMath

@Mego i do not get this

@quintopia so what would it print?

Anonymous

@quintopia True

TanMath

BTW, @quintopia why do you ask anyway?

quintopia

06:24

@TanMath because i think you may be able to replace the last two lines of your bernoulli program with return 1-((m==1)+(m+1)%2or t). Of course, that may not even be shorter than what you have...

TanMath

@quintopia lemme see

@quintopia no byte change

hey @phase

phase

@Mego you're just jealous your interpreter isn't golfed

@TanMath just poking my head in here for a sec

TanMath

@phase ?

> abandon all work, ye who enter here —aditsu

quintopia

@TanMath what about return (m==1)+(m+1)%2and 1-t

TanMath

@quintopia one byte

phase

06:28

I'm going to try to learn J while doing homework, which should turn out fun.

quintopia

@TanMath you may be able to delete space after and as well. also check it is still correct.

TanMath

@quintopia actually you cannot..

I learned that from the python tips post

@quintopia it works

Anonymous

"actually you cannot" "it works"

quintopia

@Mego it was in reference to two different things

@TanMath I think the part on the left can only ever equal 0 or 1, in which case, the and could be replaced with *

TanMath

@Mego ?

@quintopia meaning?

quintopia

06:32

@TanMath although that would require wrapping both terms in parens so never mind

fallingfalling.com

El'endia Starman

@quintopia /me quickly closes tab so I don't end up staring at that for 5 minutes

TanMath

@quintopia /me does the same as @El'endiaStarman does

quintopia

06:47

it generates more colors faster if you click

phase

07:19

/me doesn't open it in the first place so he can avoid that problem

J Cheatsheet

TanMath

09:16

someone try to figure out the date of winter bash from the following javascript code (source of the winter bash countdown):

notepad.cc/daphokro30

I want the exact lines of code where it says so

TanMath

09:32

just a mini challenge!

FUZxxl

09:53

Hey ho

Yesterday, this was a silly place.

So let me post my challenge idea from yesterday again.

fuz.su/~fuz/pi-challenge.md

What do you think?

TanMath

@FUZxxl nobody's here!

FUZxxl

:-(

New Main Posts

10:24

0

Q: Well that's odd... no wait, that's even!

Preamble Integers are always either even or odd. Even integers are divisible by two, odd integers are not. When you add two integers you can infer whether the result will be even or odd based on whether the summands were even or odd: Even + Even = Even Even + Odd = Odd Odd + Even = Odd Odd + ...

New Main Posts

10:51

0

Q: Bracket balancing

You will be given a string containing brackets ([{()}]) and any other characters (A-Z, a-z, 0-9, punctuation). You need to check if it adheres to the following rules: Non-bracket characters are ignored. Every open bracket [{( has a closing bracket )}]. So []( is not allowed. Brackets are nested...

code-golf string

Transcript for