Since combinations of CAR and CDR are frequently used, all combinations up to four uses of CAR and CDR are defined as functions of the form CxxxR:
(CAAR X) = (CAR (CAR X)) (CADR X) = (CAR (CDR X)) (CADDR X) = (CAR (CDR (CDR X)))
It's worth memorizing common combinations:
|CAR||or||FIRST||=||First element of a list|
Functions FIRST through TENTH are defined in Common Lisp.
Contents    Page-10    Prev    Next    Page+10    Index