On 12/28/18 11:26 PM, Bize Ma wrote:
> Chet Ramey (<chet.ra...@case.edu <mailto:chet.ra...@case.edu>>) wrote:
>
> On 12/23/18 12:01 PM, Bize Ma wrote:
>
> {…}
>
> > Both command line above should have printed "hello".
>
> No. 0 is the only valid subscript for a non-array variable. The difference
> between bash and other shells that implement this feature is that bash
> warns about negative subscripts.
>
>
> If you say so: fine for me.
>
> It still irks me a little that a `${var[-1]}` isn't the "last value"
> (sometimes!, consistency?).
The goal is not to make non-array variables look exactly like array
variables; the goal is to provide a little bit of syntactic sugar in
the rare case that it's useful. It's the analog to referencing an array
variable without using a subscript, which references element 0.
> I haven't seen that documented anywhere, though.
Which part? The fact that non-array variables can be referenced using
subscript 0?
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU c...@case.edu http://tiswww.cwru.edu/~chet/
