Re: [Bug-apl] Supporting negative ranks for ⍤ operator

[Jay Foad]

Incidentally, it works like this in Dyalog and NARS2000 too, though
the Dyalog documentation doesn't mention the 3-item form.

Jay.

On 27 April 2016 at 09:02, Jay Foad <address@hidden> wrote:
> Given g ← f⍤P Q R:
> P is the monadic rank
> Q is the left rank
> R is the right rank
>
> So:
> g Y applies g to the P-cells of Y
> X g Y applies g to the Q-cells of X and the R-cells of Y
>
> The ⌽3⍴⌽y1 stuff is just a too-cute way of saying that you can specify
> fewer than 3 values in the right operand, and:
> R is shorthand for R R R
> Q R is shorthand for R Q R