Re: /dev/fd/63: line 21: ((: takes && kwsi += takes : attempted assignment to non-variable (error token is "+= takes ")

[Dennis Williamson]

On Wed, Feb 9, 2022, 1:37 PM Alex fxmbsw7 Ratchev <fxmbsw7@gmail.com> wrote:

> i try, and in this it isplays me this
>
> short -x lines
>
> +++ declare kwsi= kw id code takes _t
> +++ takes=
> +++ ((  takes && kwsi += takes  ))
> /dev/fd/63: line 21: ((: takes && kwsi += takes : attempted assignment
> to non-variable (error token is "+= takes ")
>
> i dunno ? any help ?
>
> i notice a space more between (( and takes
> also takes is = [0] so += doesnt run, and in declare before kwsi is
> even declared
>
> help ?
>


If you're trying to make the incrementing of kwsi conditional on the value
of takes, you need to group the increment assignment

((  takes && (kwsi += takes)  ))

Otherwise it's trying to assign the increment to the result of the boolean
&& which is the integer 0 or 1 which are non-variables.

>