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From: Thien-Thi Nguyen <ttn@gnuvola.org>
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Subject: Re: Bidirectional hash or association list library?
Date: Tue, 04 Jan 2011 17:27:34 +0100
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	(Elena's message of "Tue, 4 Jan 2011 05:44:13 -0800 (PST)")
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() Elena <egarrulo@gmail.com>
() Tue, 4 Jan 2011 05:44:13 -0800 (PST)

   containers in which both keys and values
   can be looked up?

See =E2=80=98rassq=E2=80=99, =E2=80=98rassoc=E2=80=99, etc.