Mark Cox  <markcox80@gmail.com> wrote:
+---------------
| I wish I had the neurons and synapses that allowed me
| to navigate my data structures using CADAAR and CADADR! 
+---------------

The one place I find myself frequently using CDD*R
is in destructuring lists by "gulps" in LOOP, e.g.:

    > (defun group-by-triples (list)
	(loop for (a b c) on list by #'cdddr
	  collect (list a b c)))

    GROUP-BY-TRIPLES
    > (group-by-triples '(0 1 2 3 4 5 6 7 8 9 10 11 12))

    ((0 1 2) (3 4 5) (6 7 8) (9 10 11) (12 NIL NIL))
    > 

Note: Whether sublist (12 NIL NIL) is the "correct" result or a "bug"
depends upon your application. Adjusting the function so that the last
sublist is (12) is left as an exercise for the reader.  ;-}  ;-}

-Rob

-----
Rob Warnock			<rpw3@rpw3.org>
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