The APL Orchard

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nathan rogers

00:51

how do I set a break point in dyalog windows?

4 hours later…

Adám

04:36

@nathanrogers In the Editor window, make sure View>Stop is selected. This will show a column on the left. Click in that column to toggle breakpoint. Alternatively, go to Options>Configure>Shortcuts>BP/Toggle Breakpoint and assign a keyboard shortcut to it. Alternatively, use ⎕STOP.

In RIDE, the menu options are called View>Stops and Edit>Preferences>Shortcuts.

6 hours later…

Feeds

11:07

Q: APL - How can I find the longest word in a string vector?

I want to find the longest word in a string vector. Using APL I know that the shape function will return the length of a string e.g. ⍴ 'string' ⍝ returns 6 The reduce function allows me to map diadic functions along a vector but since shape is monadic this will not work. How can I map the shap...

1 hour later…

chrispsn

12:12

What happened to Catherine Lathwell's "APL - The Movie: Chasing Men Who Stare at Arrays"? Was it ever made?

Ven

A: Arrow those variables!

APL (Dyalog Unicode), 18 bytesSBCS {⍪⍵[⍋-@(2∘|)⍋≢¨⍵]} Try it online!

Not sure I can simplify (2∘|) here

Ven

12:35

⎕←v[⍋(⍴∘1 ¯1)∘⍴×≢¨v]

Dyalog APL

@Ven
VALUE ERROR

Ven

That one seems simpler to tacit-ify

⎕←((⊂∘⍋((⍴∘1 ¯1)∘⍴×≢¨))⌷⊢)'12' '1234' '1234' '1234' '1234' '12345678' '12345678' '12345678' '12345678'

Dyalog APL

@Ven
┌────────┬────────┬────┬────┬──┬────┬────┬────────┬────────┐
│12345678│12345678│1234│1234│12│1234│1234│12345678│12345678│
└────────┴────────┴────┴────┴──┴────┴────┴────────┴────────┘

Ven

It's 4 bytes longer though, and it's missing the table :\.

4 hours later…

Ven

16:47

Oh, maybe I can residue the indexes, take the direction, and grade that.

2 hours later…