Re: feature suggestion : add rever / // in ${

[#!microsuxx]

On Sun, Nov 3, 2024, 09:38 Andreas Kähäri <andreas.kahari@abc.se> wrote:

> On Sun, Nov 03, 2024 at 04:43:05AM +0100, #!microsuxx wrote:
> > On Sun, Nov 3, 2024, 04:25 Greg Wooledge <greg@wooledge.org> wrote:
> >
> > > On Sun, Nov 03, 2024 at 04:00:57 +0100, #!microsuxx wrote:
> > > > .. it should represent a reverse deletition
> > > >
> > > > // deletes
> > > > the reverse // does exclude the rest
> > > >
> > > > the alternative is the outdated and harder from-cut-from-beginning
> > > > then-from-end ...
> > > >
> > > > wouldnt it be a c code change like
> > > > u copy the // code
> > > > and make the match a ! match
> > >
> > > I have no idea what you're saying.  Can you show us an example command
> > > that you would run, and the action it would perform?
> > >
> >
> > hi , yess
> >
> > str=abcdef
> > changed1=${str*b!(e)}
> >
> > should return bcd
>
> Using a regular expression instead of an extended shell pattern:
>
>         $ [[ $str =~ b[^e]* ]] && echo "${BASH_REMATCH[0]}"
>         bcd
>

ill train rematch some , and see then ..

thank you ..

>
> > ${str*??} returns ab
> > eg first matched two , reverse of / // cutoff
> >
> > ${str*} ${str**} nothing
> > ${str**?} all
> >
> > and id like to request for later future a three *** , or rather some more
> > stackable symbol .. that enables reusing glob-groups
> >
> > ${str***?(??)??(?)}
> >
> > would return bc and f
> >
> > how ? i mean to what ? is an additional question
> > llike it seems to me an array dest is needed
> > or just ifs usement to expand
> > ++
> >
> > greeetss !!
> >
> > >
>
> --
> Andreas (Kusalananda) Kähäri
> Uppsala, Sweden
>
> .
>