Is there an idiom for converting an array to an associative array?

[Matt Armstrong <matt@xxxxxxxxxx>]

I'm looking for an idiom that will convert the array (a b c) into
(a "" b "" c "") so I can assign it easily to an associative array.

Right now I've got ugliness like this:

    array=(a b c)
    set -A assoc
    for i in $array; do
        assoc[$i]=""
    done

Any pointers?

-- 
matt