Re: Why doesn't nconc change my variable?

["Pascal J. Bourguignon" <pjb@informatimago.com>]

Marcin Borkowski <mbork@wmi.amu.edu.pl> writes:

> Does it mean that Pascal's earlier response was right?  Now that I'm
> thinking about it, this makes sense: an empty list is (I would guess) a
> NUL pointer, 

NO!  There is no pointer in lisp!

An empty list is the symbol nil!

    (symbolp (list))     --> t
    (consp   (list))     --> nil
    (symbol-name (list)) --> "nil"

    (symbolp (list 1))   --> nil
    (consp   (list 1))   --> t
    (car     (list 1))   --> 1
    (cdr     (list 1))   --> nil



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__Pascal Bourguignon__                 http://www.informatimago.com/
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