testing and assigning in one conditional?

The following fragment tests to see if an address is in a database,
and then if it is, assigns the address to the variable $SENDER.

    :0
    * ? /home/john/receivedAddressdb "${HOME}/address.db"
    {
        :0 whc
        SENDER=| /home/john/receivedAddressdb "${HOME}/address.db"
        :0 whf
        | formail -I "Envelope-To: $SENDER"
    }

Is it possbile to do the test and assigment in one statement?

        John

-- 

John Conover        Tel. 408.370.2688  conover(_at_)rahul(_dot_)net
631 Lamont Ct.      Fax. 408.379.9602  http://www.johncon.com/
Campbell, CA 95008  Cel. 408.772.7733  

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