Re: idea about negative indexed array keys

[Alex fxmbsw7 Ratchev]

this one looks exactly like the one i rememeber
but there are factical mismatches, it happened in the past week, with bash
5.1.4-maint
but seemfully somewhere else than direct array index

On Sat, Mar 13, 2021 at 3:36 PM Greg Wooledge <greg@wooledge.org> wrote:

> On Fri, Mar 12, 2021 at 05:11:19PM -0500, Eli Schwartz wrote:
> > On 3/12/21 4:58 PM, Alex fxmbsw7 Ratchev wrote:
> > > i saw, ${arr[-1]} == syntax error
> > >
> > > what about implenting it, -0 is the last -1 is the second last etc
> > >
> > > such negative values are already in ${..:<>:<>} implented, as a good
> small
> > > statement for the same style
> >
> > How did you accomplish the task of getting a syntax error for this? I
> > managed it with:
> >
> > $ declare arr=(foo bar baz "syntax error")
> > $ echo "${arr[-1]}"; echo "${arr[-2]}"
> > syntax error
> > baz
>
> unicorn:~$ bash-4.1 -c 'a=(a b c); echo "${a[-1]}"'
> bash-4.1: a: bad array subscript
>
> unicorn:~$ bash-4.2 -c 'a=(a b c); echo "${a[-1]}"'
> c
>
> Is that close enough?
>
>