The Nineteenth Byte

essentially you have a function, and you unsplat it, meaning that a new function is created which takes any number of arguments, puts it in a list, and feeds it to the original function

so unsplat(len)(1, 2, 3) would give 3.

Conor O'Brien

so, unsplat = (f) => (...a) => f(...a)

or unsplat = (f) => (*a) => f(*a) depending on your choice of splat

HyperNeutrino

yeah, the second one.

or really you could just do f => *a => f(*a), I think it's more readable :P

Business Cat

So basically a shorter form of [f(i) for i in a]

HyperNeutrino

no

that's map

basically a shorter form of lambda f: lambda *a: f(*a)

wait no

it's f => *a => f(a)

Business Cat

Wait I got confuse

The arguments is a list and it gets called on that list

Step Hen

12:22 AM

@HyperNeutrino you know, if you dropped all the bitwise operators or made them functions/keywords, you'd have a lot more operators...

HyperNeutrino

bitwise operators aren't meant to be keywords. I think you mean logical operators?

and yeah I could do that

I took out && and || but that doesn't add more symbols

You know, operators can be multiple symbols, so I have theoretically infinite operators :P

anyway gtg for now o/

Business Cat

@HyperNeutrino So unsplat is like this?

HyperNeutrino

2:28 AM

@BusinessCat yes. and wow chat has been quiet

Magic Octopus Urn

waits patiently to be berated for his horrible pun

Oh wow, nevermind, nobody's here... salutes a solitary passing tumbleweed

HyperNeutrino

what you made pun?

CMC: Given two numbers x, y, return (x * y) - (x / y)

Conor O'Brien

J: *-%

HyperNeutrino

o nice

Why %?

Magic Octopus Urn

@NewSandboxPosts comeon bro...

I have 10% battery left!

Conor O'Brien

2:42 AM

@HyperNeutrino because / is reduce

HyperNeutrino

ah ok

Magic Octopus Urn

*¹²/-

New Sandboxed Posts

0

A: Sandbox for Proposed Challenges

Integer? I Barely Know Her! Good christ... that's a bad pun... Given a string s and an integer n perform the IIBKH action on it, as described below. For an example string of What are those people doing? and integer 19241293124. Sort the string by ASCII-character value and remove duplicate...

Magic Octopus Urn

"Integer? I barely know her!" shows self to door

Conor O'Brien

the line after the header is hardly necessary

Magic Octopus Urn

2:44 AM

It's a sandboxie haha... None of that will stay when I actually post it, can't think of a good title.

"Arbitrary base Conversion"?

Conor O'Brien

what on earth is "IIBKH "

HyperNeutrino

I don't even get the "pun" ._.

hey I figured out how to do my CMC in Proton

((*),(/))>>*(-)

Conor O'Brien

nice

HyperNeutrino

3:00 AM

thanks

I personally quite like Proton's obscure syntax :3

I tried to make function composition as easy as possible

that pretty much means x, y => (x * y, x / y) >> (subtract)

Downgoat

@HyperNeutrino wait what does >> mean? composition?

Conor O'Brien

reduce I think

HyperNeutrino

compose

wait hold on why did I just do this

now >> means the same thing as +

hold on I just duped the operator's meaning ._.

I had a different definition for >> earlier but I changed it to make this work, but this whole time, + worked

nvm make that ((*),(/))+*(-)

Downgoat

so what is (x, y) mean?

is it vectorization or something?

HyperNeutrino

no it just calls multiple functions

so (a, b)(*c) is equivalent to (a(*c), b(*c))

so like distribution of function calling over arguments

Downgoat

3:08 AM

ok so ((*), (/)) >> (-) == (args) => [ (*)((-)(args)), (/)((-)(a)) ]

HyperNeutrino

not quite

((*),(/))+(-) means x, y => (x => x[0] - x[1])((x * y, x / y))

Downgoat

oh, then imo it should be << if its composing the other way

HyperNeutrino

well no it's mul,div then into sub

Downgoat

oh then wouldn't (a, b) >> c be c((a, b)) not (a(c), b(c))?

HyperNeutrino

no

wait yes

here you can try it online in a bit once it syncs

Downgoat

3:16 AM

@HyperNeutrino try it online ftfy

btw i can add proton syntax highlight if you'd like

Pavel

@Downgoat 0/10 has far less features

HyperNeutrino

wait you made another instance of TIO? :D

Downgoat

@Pavel opls has even more feature

HyperNeutrino

@Downgoat o yay thanks that would be nice

Pavel

@Downgoat No. It doesn't.

Downgoat

3:18 AM

no it uses TIO just better frontend :P

@Pavel this is objectively false

Pavel

Command line arguments don't even work.

Downgoat

citation-needed

HyperNeutrino

> Sorry, Command Line Arguments are not yet supported

Downgoat

@HyperNeutrino i need examples of proton syntax though

Pavel

@Downgoat Pretend it's python.

Downgoat

3:19 AM

@Pavel still that doesn't mean have less features

@Pavel O_o I can use python highlight?

HyperNeutrino

You can start with Python highlight and then add things

Pavel

Proton is "a better python"

Downgoat

@Pavel owow

HyperNeutrino

wait who said that

Pavel

@HyperNeutrino you did

HyperNeutrino

3:20 AM

also I need to change my regex literal syntax. what should I make it?

Downgoat

Does it have better lambda syntax than lambda a, b: a + b

Pavel

@HyperNeutrino /regex/flag

Downgoat

@HyperNeutrino /abc/flags dosen't work?

HyperNeutrino

@Downgoat a, b => a + b or simply (+)

Downgoat

:O that is great

HyperNeutrino

3:21 AM

@Downgoat it was originally meant to but then it doesn't work with (/) operator functions (btw thanks for the idea, I got that from Cheddar)

Downgoat

@HyperNeutrino oic. You could change / to ~ or @, those are used by pcre

HyperNeutrino

~ is bitwise complement

Pavel

@Downgoat While I will admit that Vim mode is nice, GoaTIO doesn't support filtering langs by practical/recrearional, arguments, compiler flags, splitting code into header/code/footer, loading hello world, and markdown permalink copying options.

HyperNeutrino

@ is enable-cache

Downgoat

@Pavel I actually have a search why would you want a list of 100+ items when you can search

also has markdown permalink

Pavel

3:23 AM

There's an SE post permalink.

Downgoat

yes SE uses markdown

Pavel

There's not a [Try it online!](link) option

Downgoat

wait TIO now has compiler flags

Pavel

@Downgoat In case you haven't noticed Dennis' TIO has search too.

@Downgoat SINCE MARCH IIRC

Downgoat

huh that's new

@Pavel wait why would you need this and not SE post link

HyperNeutrino

3:25 AM

anyway what regex literal should I use

Pavel

To paste in chat

@HyperNeutrino @"regex"flags@ maybe?

HyperNeutrino

I have an idea. It only breaks because of (/) so I just match that separately

@Pavel no that would bork

Pavel

@ expects a function name after it, right?

Downgoat

@Pavel oh you can use Copy Permalink to get a permalink

Pavel

And Function names don't start with "

@Downgoat [Try it online!](https://tio.run/##KyjKL8nP@w8EAA "Proton – Try It Online")

Eh

Downgoat

3:27 AM

@HyperNeutrino you can also try percent semicolon or backtick

@Pavel oh

I can add if useful. but tbh I type faster than I can click :P

Pavel

That's why Dennis' TIO supports hotkeys for that.

@Downgoat the "Donate" link on your page links to a "Permalink could not be decoded"

Downgoat

huh, where's dennis's new donate page?

Pavel

tryitonline.net

(Donations are towards the bottom)

Downgoat

ok that should be fixed and if not blame-caching

Pavel

Cool

Downgoat

3:30 AM

I'll add chat permalink later when i have time

Pavel

I think the biggest issue with GoaTIO is that I can't use Ctrl+Enter to run the code.

It's so much more convenient than clicking.

Downgoat

@Pavel ok will add too (btw definetly renaming to GoaTIO 10/10 quality name)

Pavel

You're welcome

@ConorO'Brien Can be golfed to main(){putchar(main);}

HyperNeutrino

ok done just made opfuncs {...}

Pavel

@HyperNeutrino why doesn't @"regex"flags@ work?

@ always expects a function name after it right?

HyperNeutrino

3:42 AM

Because @function enables the function's value cache

Pavel

And those can't contain quotes

HyperNeutrino

oh wait that might actually work

In that case then /"regex"/flags also works

Pavel

Well, someone might override division to work with strings.

The way that Ruby deals with this is that if it's ambiguous, it's a regex literal if there's whitescpace after the first / and division otherwise.

Anonymous

@Pavel Let's not yell

HyperNeutrino

but if it's division then there will be an expression before it, and if it's a regex, there can't be an expression before it

Pavel

3:46 AM

@Mego You don't seem to have anything to say to the two all-caps messages on the starboard >_>

Dennis

@Downgoat Better in the sense that you can't see STDERR? :P

HyperNeutrino

anyway I gtg now o/

Downgoat

@HyperNeutrino I recommend making (+) an atomic character

HyperNeutrino

?

ATaco

I wrote GoL in C++, I am proud of myself.

Anonymous

3:47 AM

@Pavel That's not constructive.

HyperNeutrino

what is atomic char

Dennis

@Downgoat There's no search on mobile. Just a huge select thingie.

Pavel

@HyperNeutrino In that case, /regex/flags works, I think.

Downgoat

@Dennis you can see STDERR but better because it now has Goat in its name :P

HyperNeutrino

@Pavel no because (/) doesn't have an expression before it but isn't a regex

I have an idea but it will take time and I'm going to sleep now. o/

Downgoat

3:49 AM

@HyperNeutrino atomic char means in your tokenizer add like a /$[+-/*]$/ rule

Pavel

Oh right operator functions

Downgoat

that way you won't even have to worry about ambiguity

HyperNeutrino

@Downgoat oh that was what I was going to do :D anyway o/ o/

Downgoat

any regex starting with /) is invalid (in any sane flavor at least)

:39419653 >_< this is like 5th time I've done this today

that would be y=0 for x=2pi right I am not crazy

I plugged it into my grapher and it's showing 6.6ish

Anonymous

@Downgoat Are you on radians mode?

Downgoat

3:55 AM

yes

Anonymous

@Downgoat Yes

Downgoat

oh my the graph goes crazy for x < 0

Anonymous

That's your calculator messing up

Pavel

@Downgoat You should replace your grapher with Math(ematica|ics)

Dennis

@Downgoat Brrr, variable reuse.

Downgoat

3:58 AM

@Pavel mathematica is only on raspberry pi and raspberry pi is far away in cabinent probably overheating :P

do you generally use online grapher when you need to do graphing (e.g. Demos)? or do you use like desktop app/real calculator

ATaco

C++ GoL demonstration (Warning, Flashing lights)

ASCII-only

@ATaco canvas >>>>>>>> terminal

@Downgoat geogebra

ATaco

Yeah but a terminal is 100% easier for me to write in

ASCII-only

Either online or offline

Anonymous

@Downgoat I use SageMath usually, or matplotlib locally if no internet connection

Pavel

4:03 AM

@Downgoat Or mathics

ASCII-only

@ATaco well you could have just used my gol thing :P

Pavel

@Downgoat I use Mathematica

It has a painfully slow startup time so I just don't close it.

ATaco

This was entirely me getting used to C++'s memory model.

Also, I use Desmos

Downgoat

@Pavel lol, same thing with atom and every electron app ever

Anonymous

Another request for more handwriting samples for an upcoming challenge

Pavel

4:05 AM

@Downgoat I used to have that issue with Atom.

Then I switched to VS Code.

Downgoat

@Mego printing, cursive or hoof-writing?

Anonymous

@Downgoat Printing. See the other samples for reference.

Downgoat

I have some cursive letters from a NN project I tried to do

ATaco

I've just started using VS Code, and I'm loving it compared to Sublime Text.

Downgoat

@ATaco I've heard great things about VS code. Does it have the ability to do things like run a command when you save a file?

Anonymous

4:06 AM

Cursive would be massively harder because there are less differences between characters

Pavel

@ATaco The next logical step is to ditch Java for C#

ATaco

@Downgoat Not sure, haven't played that much with it yet.

Pavel

@Downgoat IDK, but there's a builtin terminal.

ATaco

@Pavel VS Code doesn't count as a microsoft product.

Pavel

Really.

How do you figure that.

ATaco

4:07 AM

marketplace.visualstudio.com/…

@Pavel Open Source

Pavel

@ATaco So are both .NET Core and mono.

@Downgoat ^^^

ATaco

Open Source

Pavel

Yes

github.com/dotnet/core

ಠ_ಠ

Microsoft make good things

ATaco

(I got half way through writing and hit enter)

Pavel

Not always, but sometimes.

ATaco

4:10 AM

Microsoft made me pay $140 for an OS I already owned.

Microsoft installed Candy Crush on that OS

Downgoat

> PCs are cheap

Pavel

Says the goat with a mac

Downgoat

well I guess hardware is like $1000 cheaper

ATaco

> Microsoft installed Candy Crush on that OS

Pavel

I use Windows 10 Pro

ATaco

4:11 AM

I use home, and it saddens me

Downgoat

PSA: Don't use fountain pen with 70gsm paper on top of textbook unless you want bad things to happen >_<

Pavel

Pro doesn't even come with Skype

ATaco

Good.

But I'm not paying an extra $60 to not have skype pre-installed.

Downgoat

wait what. wtf microsft

Pavel

Think of it as Home as being 60$ less in exchange for having bloatware, like bying a phone with Amazon Offers.

ATaco

4:13 AM

They like to use Home edition as an advertising front.

Pavel

Also, you can buy Pro one time ever and then use it on how ever many computers.

ATaco

I updated my motherboard and Microsoft refused to believe I owned Windows 10, and because I only had the Windows 7 key...

Pavel

Yeah, Windows is kinda bad, and so it Bing, and so is WindowsPhone, but C# is amazing, and VSCode is amazing, and Microsoft Office is great.

@ATaco Well why'd you lose your Windows 10 key

Also, if you bind it to a microsoft account, you can just sign in with that account and have Windows 10.

Downgoat

@ATaco can't you use windows without buying it? The only thing it does is not let you change desktop background

omy, the VS Code theme is... wow

ATaco

@Pavel I didn't, but I upgraded from 7.

@Downgoat And it has a watermark

Pavel

4:16 AM

@Downgoat You can skin it to look like atom if you want.

ATaco

I don't mind the default skin.

Downgoat

does VS Code use electron or another heavy wrapper or is it all native?

Anonymous

@ATaco UEFI? That's rough.

Pavel

Also, yeah, ^^^

ATaco

I'm using VS Light right now.

Downgoat

4:17 AM

oh my the file browser is really small

Pavel

@Downgoat Electron, but it's a lot better optimized than Atom

@Downgoat ????

@ATaco Did you sign in with a Microsoft account?

ATaco

New Main Posts

0

Q: Generate all numbers whose digits add up to 13 between 1 and 10^10

Write a program that outputs the sum of all numbers between 1 and 10^10 whose digits add up to 13. So for example 9110010010, 85, 5250100, etc. all count. I'm sorry if this is already a Project Euler problem or something. Please let me know if it is. Winner is whichever runs the fastest on ...

combinatorics

Downgoat

@Pavel like each file has a small height

ATaco

@Pavel Yeah

Downgoat

4:18 AM

atom has nice big button

did microsoft forget to hire UX engineer

Pavel

@ATaco If you contact support they will probably give it to you for free.

ATaco

Yeah, I wasn't going to bother with that.

It was much easier for me to reformat, get a new key, and bitch about microsoft.

How dare they install Candy Crush on my computer

Pavel

By the way, the installer at microsoft.com/en-us/software-download/windows10 got me pro without asking me for a key or a sign-in. It's either magic or really fucking clever.

Downgoat

oh no

VS Code uses electron

Pavel

@Downgoat Yeah?

Downgoat

4:21 AM

RIP desktop applications 1970-(creation of electron)

@Pavel electron is bane of my existance

Pavel

So does Atom

ATaco

I've just discovered Electron.

I'm going to be using this, a lot.

Pavel

Please don't

Anonymous

Two kinds of people...

3

ATaco

Why make a webapp when I can make a desktopwebapp?

6

Pavel

4:23 AM

Beacuse that desktopwebapp will use up stupid amounts of memory.

By virtue of launching effectively an entire Chrome instance for your one app.

ATaco

I write in Lua, Excessive Memory is my norm.

Pavel

Anyway, to get back to what we were talking about earlier, use C# it's good

ATaco

I understand C# is good, however I prefer Java.

Pavel

y tho

ATaco

Incredible amounts of bais

Anonymous

4:26 AM

Let's not be obnoxious with text formatting

ATaco

My baises are more than just the company.

Anonymous

→ 3 messages moved to Trash

DanTheMan

whoops

Pavel

Ha ha

Mayube

@Mr.Xcoder yeah mine would need to be ku$_

Pavel

4:30 AM

> bais

ATaco

The point is, is that I won't exactly listen to reason in regards to whether or not to use C# or Java

Pavel

J#? ( ͡° ͜ʖ ͡°)

Anonymous

Every time I start to use Java, I make it about 3 classes in before I give up and use a different language

ATaco

Needs more classes

Pavel

You can totally do that with C#

Anonymous

4:33 AM

@ATaco Needs more anonymous classes or better OOP methodology

ATaco

Or, OR, I could do it this way

Anonymous

$ find ~/Seriously -name '*.py' -exec cat {} \; | grep -c class
39

Pavel

Although in C#, you can split classes between files by using partial class, allowing you to have single classes have a stupid directory structure all to themselves.

Anonymous

Of those 39, 27 are in utility libraries or the test suite

Anonymous

And also in the build directory

Anonymous

4:38 AM

21 excluding the duplication in the build directory

Anonymous

Not using OOP for everything is nice

Pavel

Eh

I get really OOPy code when I use Python or Ruby anyway.

ATaco

4:55 AM

$ find -name '*.java' -exec cat {} \; | grep -c class
95

Hmm.

I've got to pump these numbers up, these are rookie numbers.

Pavel

5:37 AM

@ATaco I'm telling you, use C#, give every method in each class two files of their own.

Unfortunately methods cannot be split into more than two files

New Sandboxed Posts

6:52 AM

0

A: Sandbox for Proposed Challenges

Find the longest Factor-Multiple sequence Inspired by this riddle. A Factor-Multiple sequence is any sequence where A[n+1] is either a multiple or factor of A[n]. Task Create a full program or function that, given a list (or any other accepted input) of positive integers, returns (one of the)...

ASCII-only

@Pavel Don't forget to give each property its own file

Pavel

@ASCII-only Of course

Hmm.... can a property's getter and setter be in different files?

ATaco

7:12 AM

@Pavel It can in Java :D

Pavel

A) Java doesn't have properties, B) java requires a class to be entirely inside of a single file.

ATaco

D:

It can in Lua :D

Mr. Xcoder

7:59 AM

If the algorithm for prime factorization takes 4.523559800145449e-06 to execute for 100000000 (Python), do you think it is efficient enough?

Note that it takes 4.886199894826859e-05 for 100000000000000000000000

So I think it is fine

It stops working for numbers like 92738496596627238748961349547846720917439855629389798278467538989805987848663

It takes ~1 sec for 927384965966272387489

New Main Posts

-2

Q: Not able to convert decimal number to hexadecimal number in stack as an array in C++.

include include include //header files include using namespace std; class Stack{ public: int top; Stack(){ top=-1; //initializing top to -1 } int s[100]; int n; char conv; void pop(); void push(int); ...

stack c++ data-structures

New Main Posts

8:33 AM

0

Q: Code Golf - Covfefe on tap

As we all know, negative press covfefe has been conspiring to bring down the American president for some months now. There's also, definitely, an algorithm in play in that word. Covfe is a refreshing caffeinated beverage, and following the president's remarks it's clear the word can now be appen...

code-golf

New Main Posts

9:04 AM

1

Q: All your base 97 are belong to us

Many programming languages are written using solely printable ASCII, tabs and newlines. These 97 characters are then stored in 8-bit bytes (which are actually capable of holding 256 different characters!), which is just terribly inefficient - especially in code-golfing, where every byte counts! I...

code-challenge base-conversion compression

ASCII-only

9:20 AM

@Mr.Xcoder :| why

@Mr.Xcoder 0/10 not good enough

@Mr.Xcoder How did you time pls

Mr. Xcoder

@ASCII-only I timed it using the timeit module in Python

import timeit

def primes(n): #code here

print(timeit.timeit("primes(100000000000000000000000)","from __main__ import primes",number=1000)/1000)

Just passing

Gotta go now

ASCII-only

@Mr.Xcoder ok

Leaky Nun

CMC: given a non-negative integer n and a positive integer m:
1. express both in binary, e.g. n=1100100 and m=100
2. repeat m until it is longer than n: n=1100100 and m=100100100
3. apply "and" to both numbers: n&m = 100100
4. find the parity of the bitsum: 0

ASCII-only

:|

string + bitwise ops = hard to golf

Leaky Nun

@Mr.Xcoder test with semiprimes

and use time.time() to time instead

could I have a look at your code?

51

A: Fastest semiprime factorization

Python (w/ PyPy JIT v1.9) ~1.9s Using a Multiple Polynomial Quadratic Sieve. I took this to be a code challenge, so I opted not to use any external libraries (other than the standard log function, I suppose). When timing, the PyPy JIT should be used, as it results in timings 4-5 times faster tha...