Re: [Bug-apl] IOTA

Thu, 03 Mar 2016 04:26:47 -0800

Hi,

I see. I guess I overlooked the 'simple' attribute in both definitions.

I will fix this in GNU APL.

/// Jürgen
On 03/03/2016 12:53 PM, Kacper Gutowski wrote:
On Thu, Mar 3, 2016 at 12:40 PM, Juergen Sauermann
<juergen.sauerm...@t-online.de> wrote:

the IBM APL2 language reference says (page 111):

If R is a simple scalar, ⊂ R is R. If R is not a simple scalar, the depth of
R is 1+ ≡R.

And the ISO standard says the same (page 169):

Z ← ⊂B
 Note: If B is a simple-scalar, Z is B.

Jay is nevertheless correct, because ⊂x is NOT a simple-scalar
according to ISO.  On page 21 it has the following definitions:


Simple: An array is simple if each item of its ravel-list is either
  a character or a number.
Simple-scalar: A simple array whose rank is zero.

The sole item of ⊂x is an enclosed array, not a character or number.


-k

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