Hi Alex, It is correct. You need nested vectors to see the effect.
Try the following.
(⊂[2]2 3⍴⍳6)∘.{⍺∘.{⍺+⍵⊣⎕←⍺,'I',⍵}⍵⊣⎕←⍺,'O',⍵}(⊂[2]10×2 3⍴⍳6)
Best,
Xiao-Yong
> On Jun 14, 2016, at 6:39 PM, Alex Weiner <alexwei...@alexweiner.com> wrote:
>
> Hi Bug-APL,
>
> Surely this is not correct:
>
> 5∘.∘.+9
> 14
>
>
> I would expect a syntax error.
> If this is valid, then I stand corrected
>
> -Alex
>
