PPT Slide

rest (cdr)

Rest extracts the remainder of the list, the part after the first element.

( rest ( list ’a ’b ’c ) ) returns ( B C )

( rest ( list ( list ’a ’b ’c ) ) returns ( C )

Rest is the modern name for the function cdr which extracts the cdr (second) field of any dotted pair.

( cdr (cons ’a ’b ) ) returns B.

( cdr (list 1 2 3 ) ) returns ( 2 3 )

( cdr ’( ( a b ) c d e ) ) returns ( C D E )

c

d

e

a

b

1.13

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