On Wed, 20 Aug 2014 15:05:48 +0200, [email protected] wrote:
> 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."
>
> Repeat-By:
> x="abcdef"; echo "${x:-2}"
> Expected: ef
> Got: abcdef
>
> or:
> x="abcdef"; echo "${x:-2:1}"
> Expected: e
> Got: abcdef
One line below it also says: "Note that a negative offset must be separated
from the colon by at least one space to avoid being confused with the :-
expansion."
$ x="abcdef"; echo "${x: -2}"
ef
$ x="abcdef"; echo "${x: -2:1}"
e
--
D.
