Re: [PATCH] doc: missing parameter expansion operators in bash(1)

[Zachary Santer]

On Fri, Aug 29, 2025 at 11:25 AM Chet Ramey <chet.ra...@case.edu> wrote:
>
> The upper and lowercase features were user requested. The business of
> making them into a parameter expansion with the ability to specify the
> modified characters was my invention, and I think it's overkill.

$ var="abra cadabra"
$ printf '%s\n' "${var^^[ab]}"
ABrA cAdABrA

Does anybody on this list have a real-world use case for this functionality?