Re: Two states of empty arrays

[Chet Ramey]

On 12/12/19 12:08 PM, Léa Gris wrote:
> Hello,
>
> Depending on how an empty array is declared, it is not stored with the
> same state.
>
> # Empty array declared without parenthesis
> unset myArr
> declare -a myArr
> typeset -p myArr
> echo "${#myArr[@]}"

This is an unset variable with the array attribute; you have not assigned a
value.


> # Empty array declared without parenthesis
> unset myArr
> declare -a myArr=()

This is an empty array variable; you have assigned a value.


--
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    chet@case.edu    http://tiswww.cwru.edu/~chet/