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please implement query-exchange

From: Dan Jacobson
Subject: please implement query-exchange
Date: 16 Nov 2002 09:59:40 +0800
User-agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.2

Maybe there should be a query-exchange function, e.g.  I want to make
all the x's become y, and all the y's become x, in
atan(x()-$xc,y()-$yc). It seems one would have a hard time doing that
with existing emacs tools.  One would have to query-replace to make x
into a temp string, then do y->x, then do temp->y: to tough for the
average user.  Therefor please implement query-exchange: looks and
feels like query-replace, but does exchanges...
http://jidanni.org/ Taiwan(04)25854780

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