Re: [Help-bash] What is the different between `unset a[n-1]` in interactive mode and non-interactive mode?

[Eduardo Bustamante]

On Mon, Dec 17, 2018 at 5:56 PM Peng Yu <address@hidden> wrote:
(...)
> Why is there such a difference between the interactive mode and the
> non-interactive mode? Thanks.

Come on Peng. Can't you try to do at least some basic troubleshooting?

* run it with `set -x'
* check if you are using the same working directory
* are there any files that might match the glob?
* do you have any glob related shopt in your initialization files?
(nullglob perhaps?)
* did you try on another system?
* did you try running the script with `bash -i ./script' to force the
interactive mode?

See:

address@hidden:~$ bash foo
+ array=(a b c)
+ n=3
+ unset 'array[n-1]'
+ echo hxB
hxB

address@hidden:~$ bash -i foo
+ array=(a b c)
+ n=3
+ unset 'array[n-1]'
+ echo himxB
himxB

address@hidden:~$ bash -O nullglob -i foo
+ array=(a b c)
+ n=3
+ unset
+ echo himxB
himxB


If you just care about the answer: The argument to unset is processed
like any other argument. If it looks like a glob, and you don't want
that, then quote it.


On an unrelated topic: Please stop using help-bash as a dumping ground
for things you're too lazy to figure out on your own. Your technical
level should allow you to troubleshoot most of these things on your
own. Also, when people respond to you, you should at least follow up
indicating the final solution that you ended up using or a "thank you"
at least, no?

Cheers.