The Nineteenth Byte

Anush

2:00 PM

oh why do you think it might be incorrect? Doesn't your code guarantee to give the right answer?

Adám

@Anush No, it does a 128-bit decimal float computation, then finds a fraction which gives the result.

But if the decimal representation runs out of precision, the fraction will be too simple.

Anush

aha... I didn't realise

Adám

@Anush You clearly need to learn to read APL.

Anush

:)

I believe I will never see APL in my life except for here :)

but that is not a reason for not learning

Adám

(,÷∨)∘1 is idiomatic APL for "find the fraction of my float"

Anush

2:04 PM

my main problem is that I find it hard to read things I can't pronounce

but that's a nice command! Does any other language have that

Adám

@Anush Companies are asking us to find people to fill their open job positions faster than we can find people for them.

Anush

interesting

Adám

@Anush But you'll learn to. It is actually a strength of APL that the "commands" don't have fixed pronunciations.

Fatalize

@Adám I mean, that’s probably because the pool of people skilled in APL is extremely small

not because there are loads of offers

Anush

ok.. I find that hard even in math. I mean if I don't know the greek letter I can't remember the formula

@Fatalize don't be mean!

Adám

2:06 PM

@Anush ∀ X in "Does any other language have X" → "Mathematica"

Fatalize

I’m not mean, just realistic :p

Anush

those are sometimes the same thing!

@Adám :)

Fatalize

@Adám This sentence is actually probably valid code in Mathematica itself

Adám

Our biggest customer has given up trying to find people. They just have their own internal APL school.

Anush

can you say who your biggest customer is?

A _

2:07 PM

An APL school?

Adám

SimCorp

SimCorp (Nasdaq Copenhagen: SIM) is a Danish-based company providing IT solutions and services to financial institutions such as asset managers, banks, national banks, pension funds, sovereign wealth funds and insurance companies worldwide.Their core product is the SimCorp Dimension, a front to back integrated investment management system used by more than 190 clients around the world. Over the years, SimCorp has acquired several companies. Equipos, now SimCorp Coric, was acquired in 2014 and offers client reporting solutions; APL Italiana, now SimCorp Sofia, was acquired in 2017 and is the leading...

Anush

thanks

I love the Danes

Adám

@Anush Me too?

@A_ Yeah, they find people with suitable knowledge in finance (or whatever they do) and teach them APL — en masse.

Actually, besides for their internal schooling, we're running 4 workshops for their employees in the next 3 months or so.

Actually, we may need to duplicate 3 sessions, because they have so many people that they'd like to limit the class sizes…

Anush

quora.com/… is quite interesting

Adám

Ugh, don't say the "Q" word on SE!

A _

2:14 PM

quora.com/… is relatively interesting

Adám

@A_ Uh, same page?

A _

"Ugh" -> "Uh" -> ?

Anush

Guh

Hug?

Adám

CMC: Given string, answer its progression until empty by removing the middle character when odd-length and the middle two characters when even-length. E.g. Hughes' → Huges'→ Hus'→ H'

You may (but are not required to) include the original and/or the empty string.

A _

Adám, 0 bytes. What Adám just did is exactly a progression of "Ugh". (With some trailing garbage)

Adám

2:21 PM

IANAPL

2

Fatalize

@Adám You example is wrong isn’t it?

shouldn’t it be Hughes -> Hues -> Hs?

AdmBorkBork

You're missing the trailing '

Fatalize

Right

Anush

now I want to set imgur.com/a/zru0DDn as a code-challenge. That is compute it to as many decimal places as possible

but I fear the wrath of the community :)

at least some part really doesn't like challenges that their favourite esolang is not designed for

HyperNeutrino

Also people don't like when the challenge is just "compute annoying amounts of floats" with minimal interesting variation besides "use different numbers".

Anush

2:26 PM

@HyperNeutrino what do you mean by "use different numbers"?

Adám

representation

Anush

the point is that the function is somewhat pathological.. it's really hard to increase the precision

which is what makes it interesting for me

HyperNeutrino

I don't personally mind but

Anush

there are a billion different quadrature methods so there is a huge range of ideas one could try

HyperNeutrino

I can see why some people don't like challenges that are pretty basic otherwise but then have the requirement of "have high precision" such that half of esolangs are just instantly wiped for no reason

Anush

2:28 PM

@HyperNeutrino right.. of course the esolangs are not wiped out. It is just harder in them. But the whole point of this site is that the competitions are per language so we are not comparing Jelly to Java

Adám

It is kind-of like a do-X-without-Y challenge.

A _

@Adám Try it online!

Anush

@Adám that's interesting. I really don't see it that way

I think this comes down to a misunderstanding of the particular challenge

Veskah

Do X without X is some big brain challenges

Adám

@Anush Isn't it do X without floats?

Anush

2:29 PM

@Adám no

Fatalize

@Adám Brachylog, 18 shitty bytes

HyperNeutrino

The thing is that the challenge had room for interesting golfs but with the arbitrary high precision requirement, the viable method for most esolangs just became a KC-golf which is a lot less interesting

Anush

@HyperNeutrino that wouldn't work here though as that would be infinite size

@Adám It is, can you find an algorithm that will give you better precision.

it's a numerical integration challenge

Adám

I think generating the matrix is the interesting part:

Anush

which has little to do with flaots

epubs.siam.org/doi/pdf/10.1137/1.9780898717969.ch1

Adám

2:32 PM

(2∘*∊⍨∘|∘.-⍨)∘⍳+,⍨(¯2⍭⍳∘≢)⍢(1 1∘⍉)⍤⍴0⍨   ⍝ generate the matrix
⌹                                        ⍝ invert it
⊃                                        ⍝ top-left element
(,÷∨)∘1                                  ⍝ find fraction

Anush

oh you are inverting it

that's interesting

Adám

@Anush Now that you know ⌹ is matrix division/inversion, you'll never forget. But what was the Mathematica function again? Inv[], Invert[], Inverse[], InvMat[], ^-1,…?

Anush

but I can't type it!

why would I use a language I can't read and I can't type

it makes no practical sense

Adám

Well, it looks similar to:

Anush

nice picture

Adám

2:36 PM

So you can read it as "domino"

Anush

ok.. so how do I type it?

I mean, the whole thing needs to be in ascii if you ask me

totallyhuman

i managed to get

["Hugghes'","Huggghes'","Hugggghes'","Huggggghes'","Hugggggghes'","Huggggggghes'","Hugggggggghes'","Huggggggggghes'","Hugggggggggghes'"...

with my first try

Adám

@Anush one way to do so is ``domino

@totallyhuman That's perfect, then just apply that function -1 times.

@Anush Imagine doing math in ASCII. E.g. imgur.com/a/zru0DDn

Fatalize

My favorite APL command is the dragon ball ⍟

Adám

@Fatalize Ooh, I never heard that name before. Most people call it "splat" or "log" (as in a cross section of a tree log).

Veskah

2:40 PM

@Fatalize If you use it 7 times, you can solve any problem ~~or get the world's most comfortable pair of underpants~~

Fatalize

…I can find plenty of other ridiculous names like this one for APL symbols :p

Adám

@Fatalize I should add them to APLcart. Want to send me a list?

Anush

julia allows greek symbols I notice now

but they show up oddly in emacs so it's not ideal

Fatalize

If we follow conventions, then ÷ is named borderless domino, or open domino if you have a diploma in topology

Adám

⍨

John Dvorak

2:45 PM

Wikipedia says it's an obelus ... though open domino is much clearer IMO

Anush

someone should really give a C++ answer for my Pi question. I think it would be straightforward using boost

A _

@Adám Try it online again!

AdmBorkBork

@Fatalize youtube.com/watch?v=QOsGA4_Y89c .

Adám

@Veskah Repeated application does look interesting. I guess the solution to all problems lie at the bottom of that spiral:

Anush

IANAPL -> I am not a pine-lapple?

A _

2:58 PM

I Am Not A Programming Language. Really clever mention of APL.

AdmBorkBork

I am not APL

Also, Pen Pineapple Apple Pen

Veskah

Loooooooooooong pen

A _

: 52454993 This makes me hungry.

Fatalize

Looks like some star abuse in the starboard

2

DJMcMayhem

@AdmBorkBork Uuuuuh

AdmBorkBork

3:11 PM

What?

A _

Unique. Unexpected. Unidentified. ... High-level.

DJMcMayhem

🎶 uuuuuh. ✒️🍍🍎✒️ 🎶

Anush

grr.. how do you search in a pdf in a capital sensitive way?

the default search in evince doesn't seem to care if it's m or N

AdmBorkBork

@DJMcMayhem Oh. You were trying to reply to PPAP message and mis-clicked?

Fatalize

Use an OCR tool on your phone that you point at your computer screen, scan the whole PDF that way, then search in the scan

very practical solution

DJMcMayhem

3:14 PM

@AdmBorkBork Oh I didn't realize

Yes, that

AdmBorkBork

Gotcha. That makes much more sense. :D

Anush

found it!

it's quite hidden

A _

@DJMcMayhem That is indeed unexpected.

DJMcMayhem

That song's an absolute banger

AdmBorkBork

I don't know if I'd go that far

HyperNeutrino

3:16 PM

I know I would

A _

I know

ngn

3:47 PM

A _

What's this? (Image not found)

John Dvorak

It's an image of a stereotypical adventurer being chased by stereotypical natives, captioned "Fire up the plane! They don't care the least about APL"

Veskah

That's from Raiders of the Lost Ark

ngn

@A_ a joke. ctrl-f5?

A _

I don't get it...

Veskah

3:54 PM

It's a colorized photo of Adam trying to tell COBOL programmers about APL, circa 1938

A _

2019 - 1923 = 96

ngn

@Veskah lol :)

A _

Adam decided to "Fire up the plane!" because "They don't care the least about APL"? I still don't understand it.

John Dvorak

... chasing with murderous intent. I thought it was obvious.

A _

Aha, they are angry about Adam's decision!

ngn

4:01 PM

@A_ you know, there are those people, missionaries, who fly to remote places in the hope of converting the natives to their religion... sometimes they succeed, sometimes they get ignored, sometimes they get eaten :)

A _

Sometimes they get beaten :)

@ngn The word length is strictly dividing by 2. 8 -> 4 -> 2 -> 1 (I guess an image is equivalent to a word).

No, 1 image = 1,000 words.

New Main Posts

5:56 PM

0

Q: Generate data buffer to zero the CRC check result

Given this checksum calculation function in C++ int calcCrcPartial(unsigned short* lpdwBlockData, unsigned short dwBlockSizeInBytes, int iInitialCrc) { unsigned short dwBlocksSizeInWords; int bIsSigned; signed int j; signed int i; unsigned short dwDataItem; bool bIsNegati...

checksum

Jono 2906

9:37 PM

Good morning everyone!

wizzwizz4

Good time zone!

o/

Adám

Good

New Main Posts

10:22 PM

-1

Q: "I Drew Sans From Undertale!"

Today's challenge is simple: your program will be given a single input. If this input is Sans, then your program should output NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNMFF*:::::::::::IFFMNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNM*::...

code-golf ascii-art kolmogorov-complexity

0

Q: Making Sandwiches

Introduction Bob runs a deli. His deli serves sandwiches to its customers. However, it is a bit unusual. At Bob's deli, instead of telling Bob what they want, customers show Bob an ASCII art drawing of their sandwich. Bob must find the pattern in their sandwich so he knows what ingredients to pr...

code-golf string pattern-matching

DJMcMayhem

11:18 PM

nnoremap <expr> <leader>a ":\<C-u>set formatoptions".['+', '-'][&formatoptions =~# 'a']."=a\<CR>" vimscript is... Kinda ugly lol

Transcript for