Hi,
Am 04.02.2016 um 00:43 schrieb Martijn Dekker:
> bash treats an empty array as if it were an unset variable, which seems
> very illogical as empty is quite distinct from unset:
>
> $ myarray=()
> $ [[ -v myarray ]] && echo set || echo unset
> unset
Which version of bash are you using?
> $ set | grep ^myarray= # yet, it's set:
> myarray=()
> $ set -u
Doesn't -u force just the behavior you observe, what if using +u?
-- Reuti
> $ for i in "${x[@]}"; do :; done
> bash: x[@]: unbound variable
>
> Note also that the "unbound variable" error is inconsistent with the
> behaviour of "$@"; I would have thought that, logically, "$@" and
> "${x[@]}" should behave the same way, since arrays are implemented as a
> logical extension of the positional parameters concept.
>
> zsh and ksh93 can distinguish between empty and unset arrays.
>
> Thanks,
>
> - Martijn
>
