|Parameters||l, a list|
|Purpose||Produces a reversed version of l.|
|Produces||A new list, r, whose elements are the elements of l in reverse order.|
|Preconditions||One parameter (verified).|
l is a list (verified).
|Postconditions||Does not affect l.|
The initial element of r is the last element of l, the next element of r is the penultimate element of l, and so on and so forth.
If any elements of l are lists, does not reverse them.
> (reverse ()) () > (reverse (list 1 2 3)) (3 2 1) > (define lists (list (list 'a 'b 'c) (list 1) (list 4 2 1 0))) > lists ((a b c) (1) (4 2 1 0)) > (reverse 'a) reverse: expects argument of type <proper list>; given a
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The source was last modified Sun Jan 28 12:30:51 2001.