Re: test -v difference between bash 5.1 and 5.2

[Chet Ramey]

On 8/29/23 11:38 AM, Kerin Millar wrote:
> On Tue, 29 Aug 2023 11:24:43 -0400
> Chet Ramey <chet.ramey@case.edu> wrote:
>
> > If you want to check whether an array variable is set, you can check
> > whether it has any set elements:
> >
> > (( ${#assoc[@]} > 0 ))
>
> This doesn't check whether an "array variable is set".

It checks whether there are any set elements. You have to assign a value
to set a variable.

> Not only that, but the test will be true in the case that assoc has been 
> defined as a variable that is not an array.

One hopes that the shell programmer knows what variable types he's
using, and uses the appropriate constructs.

--
``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/