Re: To be a list or not

[Nick Roberts]

 > The first of these complaints that it wants a list, the second says is 
 > is a list:

No it doesn't.

 >      ;; (length '(prop . val))

Debugger entered--Lisp error: (wrong-type-argument listp val)
  length((prop . val))

So it's saying that val should be a list:

(length '(prop . (val)))
2

'(prop . (val))
(prop val)

 >      ;; (listp '(prop . val))


 -- Function: length sequence
     This function returns the number of elements in SEQUENCE.  If
     SEQUENCE is a dotted list, a `wrong-type-argument' error is
     signaled.

I would start with the manual.

-- 
Nick                                           http://www.inet.net.nz/~nickrob