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From: Kevin Rodgers <ihs_4664@yahoo.com>
Subject: best way to get the list of unique keys from 2 alists
Date: Fri, 16 Dec 2005 10:47:53 -0700	[thread overview]
Message-ID: <dnuukf$u1k$1@sea.gmane.org> (raw)

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 know about remove-duplicates and union, but I'd like to avoid using
cl*.el functions.

Since completing-read seems to ignore nil entries in TABLE, this is what
I've got now:

(nconc (mapcar (lambda (assoc)
                  (list (symbol-name (car assoc))))
                alist-1)
        (mapcar (lambda (assoc)
                  (or (assq (car assoc) alist-1)
                      (list (symbol-name (car assoc)))))
                alist-2))

Is there a cleaner way?

Thanks,
-- 
Kevin

             reply	other threads:[~2005-12-16 17:47 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-12-16 17:47 Kevin Rodgers [this message]
2005-12-17  0:13 ` best way to get the list of unique keys from 2 alists Drew Adams
2005-12-17  0:36 ` Kevin Rodgers
     [not found] <mailman.19635.1134911223.20277.help-gnu-emacs@gnu.org>
2005-12-18 15:20 ` Stefan Monnier
2005-12-19 18:50   ` Kevin Rodgers
     [not found]   ` <mailman.19843.1135018721.20277.help-gnu-emacs@gnu.org>
2005-12-20  3:35     ` Stefan Monnier

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