Re: best way to get the list of unique keys from 2 alists

[Stefan Monnier]

> I've got 2 alists of (SYMBOL . "STRING") pairs, and I need to get the
> list of unique symbol names to pass to completing-read as its TABLE
> argument: (("SYMBOL-NAME") ...)

I'd just do:

    (completing-read "foo" (mapcar (lambda (x) (symbol-name (car x)))
                                   (append list1 list2)))

You don't need to remove duplicates.


        Stefan