Re: Substring Expansion does not work as intended

[Chris F.A. Johnson]

On Wed, 20 Aug 2014, Eric Blake wrote:

> On 08/20/2014 07:05 AM, eckard.brauer@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 use a variable:

o=-2
echo "${x:$o}"

--
Chris F.A. Johnson, <http://cfajohnson.com>