The Nineteenth Byte

Zachary T

10:01 PM

So, C/C++ might be possible. OFC, all theoretical.

Zachary T

10:29 PM

chirp

Mendeleev

@Adám I keep thinking that the ⎕ is a missing character

Adám

@Mendeleev How does it look when a character is actually missing?

Zachary T

Like quad, or he wouldn't be confused.

Mendeleev

Adám

@Mendeleev Hm. If you use a proper APL font (like APL385 Unicode), the Quad will have a distinct aspect ratio.

Zachary T

10:33 PM

How many of these look missing/quad to you, @Mendeleev?

⌶ɫ%'⍺⍵_abcdefghijklmnopqrstuvwxyz¯.⍬0123456789⊢¥$£¢∆ABCDEFGHIJKLMNOPQRSTUVWXYZý·⍙ÁÂÃÇÈÊËÌÍÎÏÐÒÓÔÕÙÚÛÝþãìðòõ{€}⊣⌷¨ÀÄÅÆ⍨ÉÑÖØÜßàáâäåæçèéêëíîïñ[/⌿\⍀<≤=≥>≠∨∧-+÷×?∊⍴~↑↓⍳○*⌈⌊∇∘(⊂⊃∩∪⊥⊤|;,⍱⍲⍒⍋⍉⌽⊖⍟⌹!⍕⍎⍫⍪≡≢óôöø"# &´┘┐┌└┼─├┤┴┬│@ùúû^ü`∣¶:⍷¿¡⋄←→⍝)]§⎕⍞⍣

HyperNeutrino

God please no.

Zachary T

(It has a legit purpose, if they're all displaying right in his browser, then he has no need to be confused)

HyperNeutrino

@EinkornEnchanter Darn it, your answer is too short >.<

Adám

@ZacharyT Don't forget these: ⍤⍠⌸⌺⊆

HyperNeutrino

¯\_(ツ)_/¯ at least it's not OT or giant

Mendeleev

10:35 PM

@ZacharyT Is that ALL the APL?

Zachary T

Adám

@Mendeleev Clearly you have nothing to worry about.

@ZacharyT ⍸

Zachary T

Yeah, if a box shows up, just assume it's the quad glyph.

Adám

@Mendeleev Are you using Chrome on Windows?

Mendeleev

@Adám Yes. When my SSD RMA gets delivered, I will start using Chrome on Linux.

Zachary T

10:37 PM

@Mendeleev :D

Mendeleev

I've been using Linux for the past year and when my SSD failed, I had to fall back to my WIndows install

Einkorn Enchanter

@HyperNeutrino No such thing as too short ;)

Adám

@Mendeleev Notice how ≢ renders almost like ≡/. Please star this blink issue!

Mendeleev

@Adám Wait, are they different?

Zachary T

Yeah.

Adám

10:39 PM

NO! Don't star my chat message! That won't fix the issue.

Mendeleev

Zachary T

CMC: Given an input string, output star if the input string contains the string star.

Adám

It is so annoying, and bound to be confusing.

Mendeleev

Nothing will fix the issue

New Main Posts

5

Q: How tall are the monoliths?

Here is an example of an input of monoliths. There are 4 in this example. _ | | _ | | _ | | | | | | | | _ _| |_| |___| |____| |_ The first monolith is 4 units high, the second is 2, the third is 3, and the last is 1. The task Your program should output the heights of th...

Adám

10:40 PM

@ZacharyT The string star?

Zachary T

Yes.

Not the codepoint

Adám

@Mendeleev But they made it "won't fix" under false pretenses!

Mendeleev

@ZacharyT Ruby: ->s{(s=~/star/)?'star':0}

Adám

@ZacharyT QuadR: .*(star).* \1

@ZacharyT QuadS: ⊃⍵ star &

Zachary T

APL, 8 bytes: 'star'∩⊢

Adám

10:43 PM

@ZacharyT Nope.

Zachary T

How?

Adám

@ZacharyT tryapl.org/…

Zachary T

Oh, I got it now.

Mendeleev

yay

Einkorn Enchanter

Feedback?

0

A: Sandbox for Proposed Challenges

RoboCops and Robbers A while ago we made some code to golf brain-flak for us. Eventually the code got so good that us humans could no longer compete against it. Now the code has turned against it and its your job to stop it. You need to out golf the robots. They've already golfed all the num...

Mendeleev

10:45 PM

@EinkornEnchanter eeeeeeeeeeeeeEEEEEEEEEEEEEEEEEEEE

Einkorn Enchanter

What?

Mendeleev

Audio feedback. Have you ever put a microphone to the speaker that it's outputting to?

TheWanderer

it's feedback

and pls guys

stop chat flagging messages that aren't even remotely offensive

Zachary T

APL, 18 bytes: {s/⍨∨/⍵⍷⍨s←'star'} (I'm doing something wrong here)

Adám

@ZacharyT Missing a ⍨ after the first slash.

@ZacharyT And the ∧ should be a ∨.

Einkorn Enchanter

10:47 PM

@Mendeleev Ah I see.

Mendeleev

It was an attempt at a joke

Einkorn Enchanter

It went over my head

Adám

@ZacharyT Same idea: 'star'∘{⍺/⍨∨/⍺⍷⍵}

Zachary T

Is there a way to force / to be repeat in a train?

Adám

@ZacharyT (/⍨) unfortunately

@ZacharyT Easy cop-out: ⊃'star'⎕S'&'

Zachary T

10:51 PM

o_o

Any retina answers?

Adám

@ZacharyT I'm pushing for a new glyph←{⍺/⍵}

Zachary T

Quad slash?

Adám

@ZacharyT Yeah ⍁ and ⍂ are possibilities, but 1) they look like operators (while / and \ look like functions!) and 2) what about ⌿ and ⍀?

@ZacharyT My current preferred suggestion is ⍆⍅⍖⍏ for /\⌿⍀

Zachary T

Oh, yeah, those symbols!

What on earth would ⍯ be for?

Adám

@ZacharyT Dunno. It is too busy; consists of a double overstrike: =/⎕

@ZacharyT Btw, we have quite a few dyadic functions with no monadic pairing.

Zachary T

10:58 PM

Are ⍆⍅⍖⍏ used in another APL dialect (living or dead)?

Adám

@ZacharyT Not that I know of, but ⍈ ⍇ ⍗ ⍐ are.

@ZacharyT I'd like A f\ B to replace A ∘.f B (save a byte!)

Zachary T

All of the unused stuff:

⌺ ⌻ ⌼ ⍁ ⍂ ⍃ ⍄ ⍇ ⍈ ⍰ ⍌ ⍍ ⍐ ⍓ ⍔ ⍗ ⍩ ⍥ ⍡ ⍢ ⍚ ⍛ ⍜ ⍮ ⍅ ⍆ ⍏ ⍖ ⍊ ⍑ ⍶ ⍹ ⍭ ⍫ ⍧ ⍦ ⌾

Hey, how should ⍫ be rendered? Tilde on top, or intersecting the del?

Adám

@ZacharyT As with ⍱ and ⍲ it is up to the font. Really it should be intersecting, but it is often on top for clarity.

Zachary T

There, I fixed what's unused. I had quote quad in there >.<

Adám

@ZacharyT ⌺ is used. As of today.

@ZacharyT ⍰ is reserved for Schrödinger's Operator.

Zachary T

11:05 PM

And I viewed the webinar ... Argh.

What is Schrödinger's Operator?

Adám

@ZacharyT returns an isolate which can be passed around and manipulated by structural and selective functions, but doesn't actually evaluate until inspected.

Destructible Lemon

I think it might be a joke

Adám

@DestructibleLemon Not at all: dyalog.com/blog/2015/09/…

Zachary T

(I like ⍶ and ⍹ for ⍺⍺ and ⍵⍵, as it saves bytes when one types ⍺ ⍺ and ⍵ ⍵, and if ⍶ and ⍹ are in ⎕AV, then it would save bytes defining operators)

Destructible Lemon

you ninja'd me...

Adám

11:09 PM

@ZacharyT I thought so too, until I realised that that would prevent future extension of the dfn syntax to hyperators.

Zachary T

Wait... there might be hyperoperators?

X files music

Adám

@ZacharyT Sure. Think about *. If you want to swap its arguments, you modify it with the ⍨ operator. But what if you want to swap the operands of an operator, say ⍣. Then you need to modify the operator with a …

@ZacharyT HyperSwap←{⍺←⊢ ⋄ ⍺ ⍵⍵ ⍺⍺⍺ ⍺⍺ ⍵}

@ZacharyT dfns.dyalog.com/n_hyperators.htm

Destructible Lemon

is hyperators the official name for hyperoperators?

Adám

@DestructibleLemon ^^

@DestructibleLemon What would you call it? "even-higher-order-functions"?

Destructible Lemon

@Adám hyperoperators? :P

Adám

11:14 PM

@DestructibleLemon Then why not call operators "hyperfunctions"?

Destructible Lemon

that is a good idea!

anyway, hyperators is basically hyperoperators, but with the o removed and the repeated section removed

Adám

@DestructibleLemon And they would take what? Hyperarguments?

Destructible Lemon

yes this is good idea

Adám

@DestructibleLemon Right, but hyperators taking hyperands is way cooler and golfier than hyperoperators taking hyperoperands.

Destructible Lemon

in fact, we can call functions hyperliterals!

Adám

11:17 PM

@DestructibleLemon And call literals hypernothings.

Destructible Lemon

@Adám hyperunities*

Adám

@DestructibleLemon Wait, vectors would be hyperscalars, no?

Destructible Lemon

well, you know, this is ridiculous

why would you call functions hyperliterals when there are no literals!?

they would be hyperhyperunities

Adám

@DestructibleLemon More like hyper²unities

totallyhuman

Uhh

Destructible Lemon

11:19 PM

@Adám good idea

Adám

No, wait, we need to inline that. How about hyper⍣2⊢unities?

Destructible Lemon

I think we should start a new hypermonologue

Adám

(where ⍣ is the power operator)

Zachary T

Would hyperoperators extend into hyperhyperoperators?

Destructible Lemon

@Adám hyperhyperhyperunity*

Adám

11:21 PM

@ZacharyT Of course. the hyperhyperator's hyperhyperands would be denoted ⍺⍺⍺⍺ and ⍵⍵⍵⍵.

@ZacharyT You didn't see the linked page?

Zachary T

No, was doing something.

Destructible Lemon

♦ hypermonologue of hyper things

h y p e r

Adám

@ZacharyT dfns.dyalog.com/n_hyperators.htm

Clearly, K has the only sensible solution; functions may take functions as arguments.

Zachary T

Also known as: every language ever.

Not APL-function/operator, but the respective language's functions

Adám

@ZacharyT Really? So you can write a Python function which takes a single Python function as argument, and returns a Python function equivalent to the given one, but with the order of its arguments reversed?

Zachary T

11:25 PM

Yeah.

repl.it/JIIV

That what you want?

Adám

@ZacharyT I'm not sure I understand. Does it return a function that you can name and call later?

Zachary T

Yep.

As shown here, repl.it/JIIV/1

Adám

@ZacharyT Neat.

Zachary T

Because functions are first class objects.

Adám

@ZacharyT Does bus call sub or can you delete/redefine sub and bus stays working?

Zachary T

11:31 PM

Any # of arguments: repl.it/JIIV/2

You can delete sub.

repl.it/JIIV/3

GTG ~20mins.

Adám

Higher-order function

In mathematics and computer science, a higher-order function (also functional, functional form or functor) is a function that does at least one of the following: takes one or more functions as arguments (i.e., procedural parameters), returns a function as its result. All other functions are first-order functions. In mathematics higher-order functions are also termed operators or functionals. The differential operator in calculus is a common example, since it maps a function to its derivative, also a function. In the untyped lambda calculus, all functions are higher-order; in a typed lambda calculus...

Uriel

@ZacharyT or just lambda f:lambda*a:f(*a[::-1])

Adám

Wonder why APL and K are not on there.

Uriel

@Adám I think C# can treat functions as well, but @ZacharyT : I believe this is not that common

Adám

@Uriel C# is on the list.

Uriel

11:35 PM

other scripting language with dynamic typing are probably the same way

ckjbgames

Hi!

Sorry about my post earlier

who here wants my youtube channel

Uriel

@Adám oh, just went into the article. much common than I thought

Adám

@ckjbgames You should link to it on your profile. Then anyone interested in what you do will find it.

ckjbgames

@Adám k

Adám

@ckjbgames … is an amazing programming language

Destructible Lemon

11:37 PM

I have an idea for solving this in turtlèd. however, if someone else were to solve it, I would award them a 50 rep bounty for learning Turtlèd and answering a nontrivial challenge with it

ckjbgames

@Adám :))

Destructible Lemon

is anyone interested enough to want a hint?

Uriel

@Adám its wiki, you can edit it in

Destructible Lemon

a d d i t t o t h e w i k i

Adám

@Uriel I know, but I have a huge list of Wikipedia pages that need APL added. I've already done a few.

Uriel

11:44 PM