On 2019/07/17 18:16, Darren 'Tadgy' Austin wrote:
> Repeat-By:
> declare -A foo
> foo=(["key"]="value1")
> declare -p foo
> foo=(["key"]="${foo["key"]} value2")
> declare -p foo
>
> The above should result in 'foo["key"]' having a value of 'value1
> value2', but the result is simply ' value2', which I believe to be incorrect
> behaviour.
>
In bash4.4.12, Using:
I think you need to tell bask that you are updating 'foo'
instead of assigning to it:
This seems to do what you want:
foo+=([key]="${foo[key]} value2")
> my -p foo
declare -A foo=([key]="value1 value2" )
or w/quotes:
foo+=(["key"]="${foo["key"]} value3")
> my -p foo
declare -A foo=([key]="value1 value2 value3" )
I think that without the update it becomes an assign and clears
the value assigned to 'key' before using it to form the string.
It certainly isn't intuitive, but I don't know if there is a
guarantee of it picking up the value of "foo[key]" before initializing
the target space.
