@TessellatingHeckler I spoke with Karen (the person on the receiving end of sales@dyalog.com). Thhat text is indeed up for a rewrite. In short, the idea is that you yourself can use the full product for whatever you want, as long as you're not directly making any money through code running on it.

TIOBot (0.0.6) logged in!

#tio alias

@Adám expected more arguments...

#tio alias view

@Adám
Command Aliases:
]help -> #TIO do apl-dyalog {0::⎕←⊃⎕DM⋄⎕←⎕SE.UCMD'help %args% -url'}(⎕NS⍬).(enableSALT⊣⎕CY'salt')
⋄ -> #TIO apl {0::⎕←⊃⎕DM⋄%args%}(⎕NS⍬).(⎕SE.UCMD'box on -f=on -t=tree'⊣enableSALT⊣⎕CY'salt')
⍞← -> #TIO do apl-dyalog {0::⎕←⊃⎕DM⋄⎕←%args%}⍬
] -> #TIO apl {0::⎕←⊃⎕DM⋄⎕←⎕SE.UCMD'%args%'}(⎕NS⍬).(⎕SE.UCMD'box on -f=on -t=tree'⊣enableSALT⊣⎕CY'salt')
⎕← -> #tio apl {0::⎕←⊃⎕DM⋄⎕←%args%}(⎕NS⍬).(⎕SE.UCMD'box on -f=on -t=tree'⊣enableSALT⊣⎕CY'salt')

Language Aliases:
apl-dyalog -> [apl]

@DyalogAPL Welcome back! Hope you had a nice vacation.

⍞←1⌽,⍨9⍴'''1⌽,⍨9⍴'''

@Adám 1⌽,⍨9⍴'''1⌽,⍨9⍴'''

Hi!

I'm back from academic hell

Sorry to leave my APL education for so long (now I have to review everything to catch up)

Also, I now realize that I never got around to emailing sales@dyalog.com for that license :/

@Sherlock9 Welcome back. If you email right now, you may get a response today.

I've already gotten a response!

Installing now

@Sherlock9 OK, I'll also have a look at the last things we did.

@Feeds pretty sure that's spam btw

(didn't click the link, just took a gander at the twitter handle)

By the way, do I need any of the other tools, like RIDE, on the MyDyalog page?

@J.Sallé Nah, I don't think so after looking at the actual post.

Yeah, as I said, I didn't click it. The handle is definitely a bot though

Oh heck. I've been trying to read through the documentation in the Dyalog bot's profile and I've forgotten a lot

... How to make functions for one thing

And how to make functions that recurse for another

@Sherlock9 myfn←{code ⋄ goes ⋄ here}

Ohh

@Sherlock9 {stop condition:result ⋄ ∇ new arg}

I do remember rho rho rho of x though XD

Huh

How do you assign to variables?

@Sherlock9 var←value

Riiiiiight

How did you do multi-line again?

@Sherlock9 multiline what?

Well I'm trying to write the following

Multiline functions are usually TradFns

@J.Sallé No! Multi-line dfns are very normal.

@Adám really? I don't recall seeing one

At least not that I've noticed, anyways

@Sherlock9 Double-click or Shift-Enter on a name, or enter )ed foo or ]dinput foo

@J.Sallé though they don't play nice with side-effect-full code, I find them way more easy to write & use

f ← {
  ⍵≤1:1
  ⍵×∇ ⍵-1
}

For example

I tried to write Fibonacci and got confused

@Sherlock9 in this specific case, you can use a caret ⋄ instead of a new line

@Sherlock9 that should work fine, though not in the REPL

So factorial, I guess

@J.Sallé caret diamond

Yeah that too >.>

Ohhh

Not sure where I got the name caret for that

I've been calling it caret in my mind for quite a while

@J.Sallé It is half a diamond:

⍞←⎕FMT'∧',(⎕UCS 8),'∨'

@Adám ⋄

I ought to find that bookmark that gives me all the APL characters in the browser

You can always ask the bot:

)lb

@Adám ← +-×÷*⍟⌹○!? |⌈⌊⊥⊤⊣⊢ =≠≤<>≥≡≢ ∨∧⍲⍱ ↑↓⊂⊃⊆⌷⍋⍒ ⍳⍸∊⍷∪∩~ /\⌿⍀ ,⍪⍴⌽⊖⍉ ¨⍨⍣.∘⍤@ ⍞⎕⍠⌸⌺⌶⍎⍕ ⋄⍝→⍵⍺∇& ¯⍬∆⍙ Install…

@Adám ಠ_ಠ how does that work?

@J.Sallé old APL allowed overlapping characters to make others

@J.Sallé ∧,non-destructive backspace,∨

Oooooooo I see

Ooh thanks, Adám

Damn those pesky IBM engineers for their ingeniousness

Oh hang on

I have the Dyalog APL IME

Nice

⍞←9{⍵≤0:1⋄2×∇ ⍵-1}

@Sherlock9 SYNTAX ERROR

Welp did it in the wrong order

@Sherlock9 You need the argument on the right.

⍞←{⍵≤0:1⋄2×∇ ⍵-1}9

@Sherlock9 512

Yeah, I think I've unlearned a lot. Sorry

@Adám having some trouble with formatting the string for your challenge >.>

@J.Sallé I have a couple of minutes… shoot!

Specifically, putting or not the leading zeroes where they're needed

@J.Sallé Hint: ⊥

Ok that might help

)about

@LMD You can evaluate a single line of APL by typing it into chat prefixed by ⍞←. Use ⎕← instead for boxed display and multi-line results and use ⋄ instead to silence the first statement. Use ] to call user commands, including ]help ⍣ for help on a glyph etc. Do not use markdown, but fixed-width (4 initial spaces) is fine. Commands: )lb for language bar, )docs for full documentation, )ref for PDF reference card, )idioms for idiom list.

@LMD Welcome to the Orchard. Interested in APL?

)idioms

@Sherlock9 Dyalog APL Idiom List

@dzaima hint:

⍞←2↑¨@(∊∘⎕D)'Hello, World!'

@Adám Hello, World!

Doh

⎕←2↑¨@(∊∘⎕A)'Hello, World!'

@Adám
┌──┬─┬─┬─┬─┬─┬─┬──┬─┬─┬─┬─┬─┐
│H │e│l│l│o│,│ │W │o│r│l│d│!│
└──┴─┴─┴─┴─┴─┴─┴──┴─┴─┴─┴─┴─┘

yeah, reason that doesn't work in my apl is because ↑ doesn't interpret scalars as vectors

@dzaima And the pre-edit reason too. I ended up using (2↑,∘' ')@

right, realized that too