Re: [Chicken-users] array-lib : empty arrays advertise indices that they cannot be indexed by

[Kon Lovett]

On Oct 6, 2007, at 7:53 PM, John Cowan wrote:

> Kon Lovett scripsit:
>
> > However, the 'for-each' procedure (and its' various siblings) should
> > ignore an empty array. This is fixed in the 2.114 release.
>
> But a zero-rank array (in languages that support it, like Common Lisp)
> is not empty; it has one element (it is a scalar), which can be
> retrieved by calling the array-reference function with zero arguments.

I didn't say a rank-0 array was synonymous w/ an empty array.

> In environments where both upper and lower bounds are supported, an
> array any of whose dimensions has an upper bound >= the lower bound
> is truly empty: it has no elements at all.
>
> --
> John Cowan    address@hidden    http://ccil.org/~cowan
> This great college [Trinity], of this ancient university [Cambridge],
> has seen some strange sights. It has seen Wordsworth drunk and Porson
> sober. And here am I, a better poet than Porson, and a better scholar
> than Wordsworth, somewhere betwixt and between.  --A.E. Housman

Best Wishes,
Kon