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Re: unset array[0] doesn't delete the element


From: Greg Wooledge
Subject: Re: unset array[0] doesn't delete the element
Date: Mon, 6 Mar 2017 08:31:42 -0500
User-agent: Mutt/1.4.2.3i

On Sat, Mar 04, 2017 at 09:10:00PM -0800, Isaac Good wrote:
> Repeat-By:
>       $ arr=(1 2 3); unset arr[-1]; echo "address@hidden"
>       1 2 3

On Sat, Mar 04, 2017 at 09:14:09PM -0800, Isaac Good wrote:
> Bug report being withdrawn. I had nullglob set so unset wasn't being
> invoked properly.

The bug is that you failed to quote the 'arr[-1]' word.  Whether you
have nullglob enabled or not, that word *can* be globbed against a file
in the current directory, so it must always be quoted.

imadev:~$ arr=(1 2 3)
imadev:~$ unset 'arr[-1]'
imadev:~$ declare -p arr
declare -a arr=([0]="1" [1]="2")

Good job on detecting the interaction with nullglob, though.



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