Hello lejeczek,
On Wed, 19 Apr 2023 07:50:29 +0200 lejeczek via CentOS <centos@xxxxxxxxxx> wrote:
> Hi guys.
>
> I cannot wrap my hear around this:
>
> -> $ unset _Val; test -z ${_Val}; echo $?
> 0
> -> $ unset _Val; test -n ${_Val}; echo $?
> 0
> -> $ _Val=some; test -n ${_Val}; echo $?
> 0
>
> What is this!?
> How should two different, opposite tests give the same result
> Is there some bash option which affects that and if so, then what would be the purpose of such nonsense?
Surround ${_Val} with double quotes (as you should) and things will be different:
$ unset _Val; test -n "${_Val}"; echo $?
1
Now you get it? :-)
Regards,
--
wwp
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