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Re: Unexpected result of array assignment

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  Re: Unexpected result of array assignment Léa Gris <lea.gris@noiraude.net> - 2019-07-19 03:38 +0200

#15193 — Re: Unexpected result of array assignment

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On 18/07/2019 14:12, Greg Wooledge wrote:
> 
>     On Thu, Jul 18, 2019 at 10:58:52AM +0200, Henning wrote:
> 
>                 eval 'foo=(["key"]="'"${foo["key"]}"' value2")'
> 
> 
>     If you just want to work around the bug, why not do it in the simplest
>     way possible?
> 
>     foo["key"]+=" value2"
> 
> Of course, you are right.


Can be done safely with storing the intermediate value.

declare -A foo
foo=(["key"]="value1")
declare -p foo
_v="${foo["key"]}"
declare -p _v
foo=(["key"]="${_v} value2")
declare -p foo

Still safer than eval for an extra intermediary assignment.
And allow you to insert the old value of ${foo=["key"]} anywhere 
in-between. The += string concatenation would not work in this case.

-- 
Léa Gris

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