On Wed, Jul 27, 2016 at 09:06:50AM +0300, Pierre Gaston wrote: [...] > > Description: > > Unlike usual variables, that have been assigned an empty value, > > arrays are treated by test -v as if they weren’t assigned anything. [...] > > This has been reported and discussed several times. > bash consider an array as unset until at least one of its element has been > assigned a value.
I would rephrase that, since test -v arrname will return true only if the zero element is set | dualbus@hp:~$ a=([1]=1 [2]=2); declare -p a | declare -a a='([1]="1" [2]="2")' | dualbus@hp:~$ test -v a | dualbus@hp:~$ echo $? | 1 | | dualbus@hp:~$ a=([0]=0 [1]=1 [2]=2); declare -p a | declare -a a='([0]="0" [1]="1" [2]="2")' | dualbus@hp:~$ test -v a | dualbus@hp:~$ echo $? | 0 Examples of previous discussion: - https://lists.gnu.org/archive/html/bug-bash/2014-11/msg00099.html - https://lists.gnu.org/archive/html/bug-bash/2015-04/msg00094.html -- Eduardo Bustamante https://dualbus.me/
