The Nineteenth Byte

TùxCräftîñg

19:00

@ven nobody care about accents

(except with the a/à)

Rohan Jhunjhunwala

lol im always too lazy to put in the extra effort to type the unicode accents :D

Zgarb

@ven Aren't bytes and words different things?

33

Q: What's the difference between a word and byte?

I've done some research. A byte is 8 bits and a word is the smallest unit that can be addressed on memory. The exact length of a word varies. What I don't understand is what's the point of having a byte? Why not say 8 bits? I asked a prof this question and he said most machines these days are by...

Rohan Jhunjhunwala

it would be word 20 years ago, but now with 64 bit processors most operations are executed on 64 bits.

TùxCräftîñg

why on the earth it install that ಠ_ಠ

flawr

@Zgarb Haha, that's what I'm doing right now the only better prospects is a somewhat higher salary, but in about three years I have to finish the rest of it.

Martin Ender

19:04

@RohanJhunjhunwala sorry didn't get around to reading through it yet

Nathan Merrill

@TùxCräftîñg most VS installs have a lot of tools/plugins by default

Rohan Jhunjhunwala

@Martin Ender ok, I understand you are incredibly busy, but if you do get a chance I would be interested in hearing what you ave to say.

I really want to see more king of the hill hcallenges

ven

@Zgarb they mean pretty much whatever you want...

@CᴏɴᴏʀO'Bʀɪᴇɴ that's being french! (Sorry :P)

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@ven ahaha totally agree

ven

@TùxCräftîñg gravatar regenerates my avatar every few hours

TùxCräftîñg

19:07

@ven why?

Rohan Jhunjhunwala

really?

I though t gravatars were set in stone

ven

Because I don't have my address filled in on SO/SE

TùxCräftîñg

._.

Rohan Jhunjhunwala

I need advice on an avatar

betseg

Use Androidify

Zgarb

19:08

@flawr I'm actually on my training period at this very moment. Four weeks in a summer camp in the middle of nowhere, learning about the basics of pacifism and environmental protection... at least I can go home every weekend. :/

flawr

@ven A byte is a word, but a word is 4 bytes.

TùxCräftîñg

@flawr s/4/2/

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@RohanJhunjhunwala unicorn

@TùxCräftîñg no

Rohan Jhunjhunwala

lol

Eᴀsᴛᴇʀʟʏ Iʀᴋ

it varies

TùxCräftîñg

19:08

@RohanJhunjhunwala a nuclear explosion

Eᴀsᴛᴇʀʟʏ Iʀᴋ

32 bit and 16 bit words are the most common though

TùxCräftîñg

word = 2 bytes, double-word = 4 bytes

flawr

@Zgarb Haha, I had to do something similar, also in the middle of nowhere (with very uncomfortable chairs...)...probably more to come.

betseg

@RohanJhunjhunwala use Androidify

Business Cat

@RohanJhunjhunwala A cat

Rohan Jhunjhunwala

19:09

ooh i like that @TùxCräftîñg

Business cat, that gives me an idea

TùxCräftîñg

heh

Cᴏɴᴏʀ O'Bʀɪᴇɴ

nuclear ~~car~~ cat

Eᴀsᴛᴇʀʟʏ Iʀᴋ

^

yes

Business Cat

Random question, has anyone ever done a solution in Folders?

TùxCräftîñg

brb creating a neclear cat

Eᴀsᴛᴇʀʟʏ Iʀᴋ

19:10

@BusinessCat yes

but not me

flawr

@Zgarb theproofistrivial.com

2

Eᴀsᴛᴇʀʟʏ Iʀᴋ

@RohanJhunjhunwala avatar:

Rohan Jhunjhunwala

@BusinessCat s2.quickmeme.com/img/99/…

why is markdown not supported here?

flawr

@RohanJhunjhunwala It is, just not all of it. (See bottom right, help)

Rohan Jhunjhunwala

ok

ven

19:13

@flawr no.

A word is not fixed size.

flawr

a "word" is 4 bytes

get it?

Rohan Jhunjhunwala

a "word" is four bytes

there

ven

@flawr >.<

Rohan Jhunjhunwala

unless its utf-16 or utf-32 :D

ven

Insert words than end in gry here

Cᴏɴᴏʀ O'Bʀɪᴇɴ

19:14

@Zgarb Jellyfish is really interesting!

betseg

"a word" is 7 bytes in C

Lembik

I have come across a tricky practical programming problem recently and I am wondering how to turn it into a challenge

Rohan Jhunjhunwala

link it

TùxCräftîñg

wtfffff

Lembik

@RohanJhunjhunwala was that for me?

betseg

19:15

@TùxCräftîñg T R I P P Y

Rohan Jhunjhunwala

yes @Lembik

TùxCräftîñg

TIL i am bad at paint.net

Zgarb

@CᴏɴᴏʀO'Bʀɪᴇɴ Thanks! Oh BTW, since you like implementing languages, you should look into Pratt parsers.

Lembik

@RohanJhunjhunwala oh well it's not from a web page

it's from personal experience

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@Zgarb No problem! And... that's a link to difference between word and byte

Rohan Jhunjhunwala

19:17

sandbox it,

Cᴏɴᴏʀ O'Bʀɪᴇɴ

(Also, the unary forms of N and - are the same, at least, according to the docs. Is this intentional?)

Zgarb

@CᴏɴᴏʀO'Bʀɪᴇɴ No it's not. shady look

Lembik

It's this simple sounding problem. Given a text file describing a graph, with two node ids per line, output a sparse adjacency matrix

Rohan Jhunjhunwala

make it code-golf

Lembik

@RohanJhunjhunwala good idea.. I was looking for some advice here first

ven

19:17

@betseg wat

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@Zgarb >_> I see

Lembik

@RohanJhunjhunwala I think it should be fastest-code.. because the whole problem is RAM usage

New Main Posts

1

Q: Sort band names

Challenge description You have a music library with many tracks recorded by many bands, each of which has a name, like Queen, AC/DC, Sunny Day Real Estate, The Strokes . When an audio player displays your library alphabetically by band name, it usually skips the The part, as many band names star...

code-golf string sorting

Rohan Jhunjhunwala

oh ok yeah

Lembik

it's very easy if you don't care how much RAM you use

and hard if you do

Rohan Jhunjhunwala

19:18

and require ascii output

ven

The only thing C dictates is that a char is 1 byte

Cᴏɴᴏʀ O'Bʀɪᴇɴ

> mixfix

I like that word.

TùxCräftîñg

here is the nucatlear

betseg

@ven 'a', ' ', 'w', 'o', 'r', 'd', \0 = "a word"

Zgarb

@CᴏɴᴏʀO'Bʀɪᴇɴ I think - is arithmetic negation, and N is logical negation. The docs are horribly incomplete.

TùxCräftîñg

19:19

@betseg -¯-

Lembik

@RohanJhunjhunwala ascii output.. hmmm

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@Zgarb oh, I see. that makes sense.

Rohan Jhunjhunwala

@BETSEG if you don't mind garbage at the end leave out the \0 null byte

TùxCräftîñg

@RohanJhunjhunwala a wordÊåùÌÔÆ↓¬G«

betseg

But a string in C is just a char array terminating with \0

Zgarb

19:20

@CᴏɴᴏʀO'Bʀɪᴇɴ Anyway, Pratt parsers are used for parsing expressions with prefix, infix and postfix operations and arbitrary precedence rules. I use them for Grime, and they're awesome.

TùxCräftîñg

i use a pratt parser in neoscript

Zgarb

I think someone made a JavaScript tutorial for them too.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@Zgarb This looks fascinating--revolutionary. Thanks so much! :D

TùxCräftîñg

no love for my nuclear cat ;_;

or my hard trip one

ven

@betseg remember, words than end in gry :).

@CᴏɴᴏʀO'Bʀɪᴇɴ don't you like agda? :D

Zgarb

19:24

@TùxCräftîñg Oh you used the JS tutorial with the nud and led methods.

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@ven it sounds like a cool word

TùxCräftîñg

@Zgarb i just have adapted effbot.org/zone/simple-top-down-parsing.htm

ven

It's a purely functional, dependently typed programming language.

Zgarb

@TùxCräftîñg That one exactly.

ven

@CᴏɴᴏʀO'Bʀɪᴇɴ you can define i.e. if_then_else_ a b c = ... and then call it as if True then b else c

And the paper describing the parsing also is named mixfix parsing :)

Cᴏɴᴏʀ O'Bʀɪᴇɴ

19:26

@ven whoa that's cool

TùxCräftîñg

coolink

5

Q: Move platforms!

The Challenge Given either a string, multiline string, or a two dimensional array, and a positive integer n, output the position of the platforms n turns after the initial position. U, D, R, L are platforms. ^, v, >, < are arrows that change the directions of the platforms. U, D, R, L move...

code-golf string grid

why on the earth this question is closed ಠ_ಠ

betseg

Does this happen to you yoo?

TùxCräftîñg

@betseg wat

betseg

@TùxCräftîñg nuclear war

Dennis

@betseg The CSS file failed to load. Just refresh.

ven

19:27

@CᴏɴᴏʀO'Bʀɪᴇɴ yeah it's amazing. Sometimes I think Agda code was made to look like an actual paper :P

betseg

@Dennis ye i know but refreshing doesn't fix

TùxCräftîñg

9 mins ago, by TùxCräftîñg

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@ven I can see that

public class Precedence {
  public static final int ASSIGNMENT  = 1;
  public static final int CONDITIONAL = 2;
  public static final int SUM         = 3;
  public static final int PRODUCT     = 4;
  public static final int EXPONENT    = 5;
  public static final int PREFIX      = 6;
  public static final int POSTFIX     = 7;
  public static final int CALL        = 8;
}

ven

@CᴏɴᴏʀO'Bʀɪᴇɴ case in point (sure hope you can read ml-ish notation :P)

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@ven ml-ish?

ven

19:29

@CᴏɴᴏʀO'Bʀɪᴇɴ the only word separators are space and parens. Everything else is a-okay

@CᴏɴᴏʀO'Bʀɪᴇɴ ML family. caml, haskell, etc

TùxCräftîñg

@CᴏɴᴏʀO'Bʀɪᴇɴ AHHHHH JAVA

Cᴏɴᴏʀ O'Bʀɪᴇɴ

@TùxCräftîñg that is the stuff nightmares are made of .-.

@ven oic

TùxCräftîñg

@Downgoat lel

Cᴏɴᴏʀ O'Bʀɪᴇɴ

∷-injective : ∀ {a} {A : Set a} {x y : A} {xs ys} →
x ∷ xs ≡ y List.∷ ys → x ≡ y × xs ≡ ys

Totally math paper.

Dennis

@betseg Do a hard refresh.

ven

19:30

@CᴏɴᴏʀO'Bʀɪᴇɴ so fabulous :P

Cᴏɴᴏʀ O'Bʀɪᴇɴ

beautiful.

ven

The worst thing is that I can totally read it, fml :(

betseg

@Dennis im on mobile

TùxCräftîñg

where is the source of agda?

Dennis

@betseg Visit javascript:location.reload(true).

ven

19:32

@TùxCräftîñg look at the github org.

Agda is written in Haskell

TùxCräftîñg

~~AHHHHHH HASKELL~~ k

betseg

@Dennis didn't work:(

ven

If you want to be a true polyglot, you'll have to learn weird things like haskell

But it's all very easy once you realize a monad is a monoid in the category of endofunctors!

TùxCräftîñg

more seriously i have already programmed in haskell but gave up after 5mn

but TCO is great.

Rohan Jhunjhunwala

Learn you a haskell for great good

Come to the darkside learn java

you can write dubious code for any pltform you wish

flawr

19:35

May I post a video of a dog?

Rohan Jhunjhunwala

and you dont have to be worried about being outgolfed!

betseg

@RohanJhunjhunwala I'm trying but the IDE isn't opening

Rohan Jhunjhunwala

yes? @flawr

TùxCräftîñg

@RohanJhunjhunwala NEVER

JAVA IS THE DARK LORD

Rohan Jhunjhunwala

@betseg which ide

flawr

19:36

Automatic Door Closes on Sleeping Dog's Head

►

2

Rohan Jhunjhunwala

@TùxCräftîñg you cant resist our allure forever

betseg

@RohanJhunjhunwala it's...a joke. About the lagginess of Java

TùxCräftîñg

for me it's simple: i have borked eclipse by installing a plugin for haskell

Rohan Jhunjhunwala

thats hilarious :D @flawr and @TùxCräftîñg

Knock Knock

betseg

Who's there

Rohan Jhunjhunwala

19:38

Realy long pause....

Java

betseg

LOL

Rohan Jhunjhunwala

Knock Knock

Assembly

betseg

LOLOLOL

Knock knock

TùxCräftîñg

Assembly is great

ven

I have borked Eclipse by virtue of it being Eclipse.

3

TùxCräftîñg

19:39

because you can do lock cmpxchg8b eax

betseg

Knock knock

Rohan Jhunjhunwala

who's there

betseg

Segmentation fault (core dumped)

Rohan Jhunjhunwala

Thanks!

Steven H.

Rohan Jhunjhunwala

19:40

C?

betseg

@RohanJhunjhunwala ye

Rohan Jhunjhunwala

lol @StevenH.

TùxCräftîñg

@StevenH. so true

Rohan Jhunjhunwala

You know something is wrong with a language when you can create a Math object

TùxCräftîñg

but this is fixed with edge

Rohan Jhunjhunwala

19:41

or a void object

betseg

@TùxCräftîñg true

Justin Tervay

if a challenge from 6 months ago doesn't have a solution in a certain language, can I post a solution to it? or is that frowned upon? new to this community.

TùxCräftîñg

VS installer is still running after 30mn lol

Rohan Jhunjhunwala

671

A: Write a program that makes 2 + 2 = 5

Java Reflection is indeed the right way to go with abusing Java... but you need to go deeper than just tweaking some values. import java.lang.reflect.Field; public class Main { public static void main(String[] args) throws Exception { Class cache = Integer.class.getDeclaredClasses...

@JustinTervay go for it!

Steven H.

@JustinTervay Go for it, but it won't be a competing answer if the language version is newer than the challenge

TùxCräftîñg

19:42

> Warning: Doing this in real code will make people very unhappy.

Justin Tervay

@StevenH. Right, I've seen that rule. It's python so that's not an issue :) Thanks guys!

TùxCräftîñg

removing it from the codebase

betseg

void* a_void_pointer;

TimmyD

@JustinTervay Some challenge around here doesn't have a Python answer? That's amazing.

TùxCräftîñg

i hate C++ because i must do int *lelkaboom = (int*)malloc(sizeof(int))

betseg

19:43

i don't think you must

TùxCräftîñg

at least MSVC dont compile if i omit it

betseg

you must do it if it's a dynamicly set array

TùxCräftîñg

idk about g++

Rohan Jhunjhunwala

@TùxCräftîñg I showed it to my program teacher. He was not a big fan of it. THen again he's against gotoes and break statements

Justin Tervay

@TimmyD codegolf.stackexchange.com/questions/66603/…

TùxCräftîñg

19:44

> he's against gotoes and break

GOTO FTW

Rohan Jhunjhunwala

ikr

TùxCräftîñg

I AM A TRUE PROGRAMMER

Rohan Jhunjhunwala

GOTO considered helpful

TùxCräftîñg

SO I USE GOTO

Martin Ender

@Zgarb is there a way to compose two unary functions?

betseg

19:45

I AM FROM ITALY I LIKE SPAGHETTI CODE

2

Rohan Jhunjhunwala

esolangs.org/wiki/Goto

TùxCräftîñg

@betseg ixdé

betseg

@RohanJhunjhunwala oh my...

Doorknob

@TùxCräftîñg you shouldn't ever be using malloc in C++

TùxCräftîñg

@Doorknob ಠ_ಠ

malloc is great

flawr

19:46

@Doorknob You shouldn't ever be using C++

TùxCräftîñg

(PS: i hate type-safety and i love memory leaks)

^^

ven

@betseg no, @TùxCräftîñg is correct, C++ won't automatically void* to T

Rohan Jhunjhunwala

Wait lets take a look at Swift.

Steven H.

I can't math right now, how many calls to Python's len should I have in my program before I devote a line to l=len?

ven

However he's wrong for using malloc in C++ :-)

Rohan Jhunjhunwala

19:47

Developmenent in swift is anything but swift

lets take a guess at what the ! operator does

anyone?

ven

Swift is very nice.

Rohan Jhunjhunwala

Are you kidding me?

ven

It forcefully unwraps an optional

Rohan Jhunjhunwala

The compiler is buggy af

ven

Easy question, next one?

That too, as prefix.

Rohan Jhunjhunwala

19:48

@StevenH. thats what any sane language would do, but ven is right

wait it works as negation?

betseg

if(!statement)

Probably

ven

As a prefix operator. As postfix it's unwrapping.

Two separate operators

... Not sure why you're answering me :)

Rohan Jhunjhunwala

@ven why does it depend on equal whitespace on each side of an equals sign?

betseg

What is unwrapping i don't speak swift

ven

@RohanJhunjhunwala sorry?

Justin Tervay

19:49

@StevenH. l=len is 5 bytes, and calling l(str) is 1 byte (now 6), so anything over 2 calls saves bytes, while 2 calls will be the same

ven

@betseg a! :: Maybe t -> t

Rohan Jhunjhunwala

@ven if you have xcode open try this a=5

Justin Tervay

I didn't word that 1 byte part perfectly but I hope you get my drift

Rohan Jhunjhunwala

a=5
a = 5

Nathan Merrill

kotlinlang.org/docs/reference/null-safety.html

Rohan Jhunjhunwala

19:50

it robbed my formatting

Steven H.

The only operators that I appreciate having different functionalities between prefix and postfix with are ++ and --, but having ! work that way too?

betseg

@ven wow...this looks like chinese. Please talk in English or C or something like that

Nathan Merrill

kotlin has very similar syntax (!! instead)

Rohan Jhunjhunwala

'a = 7' does not compile

why is it pretty printing my code

there should be two spaces after the equals

'a = 7' wont compile

betseg

@RohanJhunjhunwala wtf

Rohan Jhunjhunwala

19:51

again wtf

@betseg the language depends on equal whitespace in front of and behind equality operators

its ridiculous

betseg

wow...just...wow

Doorknob

In what situation would you not want that?

TùxCräftîñg

brrrrb

betseg

a:=3 vs a=3?

Steven H.

Meanwhile I'm trying to work out four different programs at once and I really should just focus on one of them

Rohan Jhunjhunwala

19:52

@Doorknob whitespace should not be that sensitive a =3 should compile as fine as a(space)=3

a=3 versus a =3 both should compile

Doorknob

@RohanJhunjhunwala Why would you ever want to type a =3 instead of a = 3?

ven

If you want to declare a variable use "let"...

Rohan Jhunjhunwala

@Doorknob why not

Nathan Merrill

enforcing good code style is a good thing

Rohan Jhunjhunwala

@ven what if i want to change it later?

let makes it final

ok, but for example lets look at their try catch statements

do try catch???

instead of try catch

why?

feersum

19:54

If you have a line break in you statement, do you have to write
`k
=
3` ? :P

Doorknob

@RohanJhunjhunwala Why not? That doesn't make any sense. Why not put five newlines between every statement?

ven

Do/try/catch is fine, makes for finer-grained control.

Rohan Jhunjhunwala

my question is why cause compilation failure just because somewhere one space is off?

ven

I'm used to eval in Perl 5 so /shrug

Doorknob

@RohanJhunjhunwala My question is, in what situation would you need that to compile?

Nathan Merrill

19:56

@RohanJhunjhunwala because if compiles don't enforce it, then often times, nobody will

feersum

a = 123
b =   5
c =  27

Nathan Merrill

compilers*

Rohan Jhunjhunwala

@Doorknob I guess I do concede, I may be a bit of an apple hater. @feersum gives me a legitimate use case

to make things line up nicely

Nathan Merrill

@feersum if you add d = 123456, then you have to rearrange everything

left aligned is better :)

muddyfish

tabs

Rohan Jhunjhunwala

19:57

eh, ill concede my apple hatred.

feersum

@NathanMerrill What if you had variable names of different lengths ? WHOAAA

muddyfish

32

Q: My god, it's full of spaces!

Some people insist on using spaces for tabulation and indentation. For tabulation, that's indisputably wrong. By definition, tabulators must be used for tabulation. Even for indentation, tabulators are objectively superior: There's clear consensus in the Stack Exchange community. Using a sing...

code-golf string conversion whitespace

Nathan Merrill

@feersum then I forgo aligning in the first place

muddyfish

see

ven

Lining up variables... Sigh...

muddyfish

19:58

even dennis agrees

Rohan Jhunjhunwala

but please do read this.
https://kakubei.github.io/2014/11/15/swift-is-a-mess/

Doorknob

@feersum

ven

I don't really care what other people think of the language I use, tbh..:)

feersum

@Doorknob Not if you're using Swift, if what we're told is true.

ven

This whole Swift blogpost is utterly outdated. We're at v3.

Zgarb

20:04

@MartinEnder Both ~ and & should work, IIRC.

TimmyD

Tabs are for hipsters. Spaces are for coders. ;-)

ven

Tabs are for people who understand indentation /s

Nathan Merrill

catch-where is cool

betseg

try{throw pokeball;}catch(em all){}

Btw kids don't do tabs

ven

If you dislike do/try/catch in Swift don't even try Ruby :D.

TimmyD

20:10

PowerShell has try/catch{1}/finally

Optimizer

Hi

TimmyD

I don't know how to regex it

VTCAKAVSMoACE

@flawr brainfuck.tryitonline.net/…

TùxCräftîñg

AHHHHH I AM BACK

a cmd window from SysWOW64 is popping randomly and close some millisecond after

Prelude> let 2+2=5 in 2+2
5

haskell swag?

Rohan Jhunjhunwala

such haskell much wow

how are ppcg id numbers asssinged?

TùxCräftîñg

20:21

@RohanJhunjhunwala new user = last user id + 1

Rohan Jhunjhunwala

how do i access them

like look at it

Cᴏɴᴏʀ O'Bʀɪᴇɴ

carefully

Steven H.

I finally complete my Python 3 answer for Integers, Assemble!... it's well over 500 characters and all of the other implementations are like 200

ven

@TùxCräftîñg congrats on defining a function :)

TùxCräftîñg

$ ghci
WARNING: GHCi invoked via 'ghci.exe' in *nix-like shells (cygwin-bash, in particular)
         doesn't handle Ctrl-C well; use the 'ghcii.sh' shell wrapper instead
GHCi, version 7.10.3: haskell.org/ghc  :? for help
Prelude> ^C

Elie@elie-asus ~
$ ^D
Prelude> logout

ven

20:31

@StevenH. are they golfing languages?

TùxCräftîñg

no, you are sure?

Steven H.

@ven Nope, Javascript and Python 2

TùxCräftîñg

yay another loading bar

i love VS

Cᴏɴᴏʀ O'Bʀɪᴇɴ

20:55

hahah

flawr

@VTCAKAVSMoACE Oh great=)

finally caught it, can't let go

TùxCräftîñg

import requests, re

reg = re.compile(r'<title>([^<]+) - [^<]+</title>')

url = "https://esolangs.org/wiki/Special:Random" # Esowiki
#url = "https://en.wikipedia.org/wiki/Special:Random" # Wikipedia
def getlang():
        r = requests.get(url)
        return reg.search(r.text).groups()[0]

n = 50 # Number of searches
for _ in range(n):
        print(getlang())

^ cool script

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