Hello, I see.
My fault - thanks for the lesson... thought I had already used that at
a time, but can't remember for sure.
@Greg: The explanation does illustrate it very nice, as I regularly use
the ":-" - should have noticed that.
Thanks again, and kind regards
Eckard
Am Wed, 20 Aug 2014 07:50:09 -0600
schrieb Eric Blake <ebl...@redhat.com>:
> On 08/20/2014 07:05 AM, eckard.bra...@gmx.de wrote:
>
> Not a bug.
>
> >
> > Description:
> > Substring Expansion actually works different than manpage
> > states, namely:
> >
> > "If offset evaluates to a number less than zero, the value
> > is used as an offset from the end of the value of parameter."
>
> Read further.
>
> "Note that a negative offset must be separated from the colon by at
> least one space to avoid being confused with the :- expansion."
>
> >
> > Repeat-By:
> > x="abcdef"; echo "${x:-2}"
> > Expected: ef
> > Got: abcdef
>
> echo "${x: -2}"
>
> >
> > or:
> > x="abcdef"; echo "${x:-2:1}"
> > Expected: e
> > Got: abcdef
>
> echo "${x: -2:1}"
>
--
:)
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