Re: setarray[unsetkey] doesn't trigger nounset in arithmetic context

[Chet Ramey]

On 5/21/23 5:01 PM, Martin D Kealey wrote:

> 1. ${array[@]:start:count} can under some circumstances return elements
> with indeces >= start+count, completely contravening expectations from
> other programming languages. There should be a `declare` or `local` option
> to fix that, and/or a shopt setting.

In the presence of sparse arrays, sure. It's supposed to return `count'
elements, not "the number of elements between array[start] and
array[start+count]." If you want that, isn't it easy enough to initialize
the elements so you don't have a sparse array?

> 2. ${#array[@]} gives the number of elements rather than the last index
> (minus 1). Being able to declare an array as non-sparse (so that all gaps
> "exist" with some default value) would fix this.

Again, it seems easy enough to initialize your arrays to whatever default
value you choose if you want this.

--
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    chet@case.edu    http://tiswww.cwru.edu/~chet/