The Nineteenth Byte

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9:04 PM

@dzaima I think D←{⍵⍵} is special cases just like F←{⍵} (clearly ← isn't a function there). And it just hasn't been enabled for F←⍣.

Zacharý

I found my problem, I just don't know how on earth to fix it: my code passes references to just the values.

Adám

@dzaima @Zacharý Note that {⍵⍵} (without assignment) fails.

dzaima

@Adám so really ← is an extremely strange piece of hackery

Zacharý

@Adám So ← is a function? O_O

Adám

@dzaima Yes.

Zacharý

9:06 PM

@dzaima In RAD, ← is syntax, just like [...] and dfns/dops.

Adám

@Zacharý In normal (i.e. array assignment) circumstances ← is a hybrid like /

Zacharý

Sorry, I just typed ← into Dyalog and it didn't error, which surprised me.

Adám

@Zacharý It is equivalent of typing /

Zacharý

This works: (A∘←)4 in Dyalog ∘_○

Adám

@Zacharý Yes, and even this works: A←2 ⋄ f←A∘← ⋄ f 3 ⋄ A

@Zacharý Btw, the correct facial expression is ∘.○

dzaima

9:10 PM

no idea how a b c←{⍺ ⍺⍺ ⍵}1 2 3 works, especially as the derived function can't be separated out

Zacharý

@Adám I'm just using them at different size eyes. Why on earth would one want an outer product of ○?

Adám

@Zacharý trig-table: 1 2 3∘.○angles

Zacharý

I was thinking of the constant on the right, whoops. And RAD doesn't have ∘.f. Instead, it has 1 2 3○⌾Angles for one byte off :P

Adám

@Zacharý Is ⍺ f\ ⍵ defined in RAD?

dzaima

@Adám then you couldn't make variables containing ops though

Adám

9:19 PM

@dzaima You mean assign an operator (or a function for that sake) to a name? Right.

dzaima

so really the only option is to have ← be a crazy mess of exceptions if you don't want to lose a ton of functionality..

Zacharý

@Adám Not as of yet, but when \ is implemented, by then I should have come up with a use.

Adám

@dzaima I guess Dyalog's crazy mess of exceptions is acceptable then.

ASCII-only

@Adám monadic?

Zacharý

@ASCII-only A+←2 (don't forget, APL/J/K/RAD operator ≠ other language's operator)

Adám

9:33 PM

@ASCII-only Applied monadically with array operand: 'a'←42 Applied dyadically with function operand: 'a'+←42 Compare to 'a'@g 2 and 'a'f@g 2

@Zacharý So you use APL nomenclature? (J says noun, verb, adverb instead of array, function, operator; K only has arrays and functions.)

And Jelly calls then arrays (?), atoms, and quicks.

Zacharý

@Adám For RAD, yes. Except "arrays" are "vectors" in RAD (and I forget to say monadic operator, dyadic operator, monadic function, dyadic function. This is reflected in the code)

@Adám Arrays, atoms/links (depending on if it's a built-in or not), and quicks.

Is using sets for variables a complete hack?

ASCII-only

@LeakyNun hang on. this is the wrong root

Leaky Nun

@ASCII-only that isn't even a root :P

mınxomaτ

Heh: github.com/martenbjork/github-xp

Leaky Nun

(scroll down for the correct one)

Adám

9:41 PM

@Zacharý Are all functions not ambivalent? Interestingly, in APL*PLUS and APL2, all functions are ambivalent (they don't have dfns, only tradfns). In Dyalog, you must explicitly declare your tradfn as ambivalent.

Erik the Outgolfer

@mınxomaτ hahaha good luck GitHub

ASCII-only

@LeakyNun so apparently I did get something that works although IDK how it works

Leaky Nun

lol

Zacharý

@Adám They are all ambivalent, I just wanted to say all four, because me dropping the word "operator" can get people confused with the monadic and dyadic cases of function calls

Adám

@Zacharý J distinguishes monadic and dyadic operators completely; as adverbs and conjunctions.

Zacharý

9:45 PM

@Adám I can't stand calling programming terms by common natural language terms.

ASCII-only

@LeakyNun and it's 76 bytes :/

@Zacharý :| why

Zacharý

@ASCII-only I don't know, honestly. Maybe it just comes from a hate of Perl.

ASCII-only

@Zacharý ... what does perl have to do with this

Zacharý

@ASCII-only I remember seeing Perl docs and books call them that way, and I tried to get into Perl, and then I hated it.

ASCII-only

> and I tried to get into Perl

clearly you didn't try hard enough >_>

Zacharý

9:49 PM

@ASCII-only ._.

ASCII-only

@Zacharý like i learnt the basics in like one day on code-golf.io >_>

Adám

@Zacharý I don't like it either. So at least I'm in good company.

Adám

10:15 PM

@Zacharý Have you implemented dyadic ⍉?

Zacharý

10:30 PM

@Adám Once I get assignment working, I'll start implementing a LOT more ~~Adáms~~ atoms. So, no I have not.

Adám

@Zacharý That one is interesting, wonder if I should make it a CG on main…

Zacharý

I assume you're talking about RAD, right?

H.PWiz

Q: A Dance of Many Dimensions

Challenge Given a n-dimensional array of integers and a permutation of the first n natural numbers, permute the array dimensions accordingly. Details This challenge is inspired by MATLABs permute. demonstration The permutation is given as a list of integers, e.g. [1,3,2] means 1 gets mapped to...