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Add `last'.

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This commit is contained in:
Dave Love 2000-08-23 14:19:27 +00:00
parent bfccb7b3bc
commit dbda27d1f9
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8
lispref/lists.texi
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@ -383,6 +383,14 @@ If @var{n} is zero or negative, @code{nthcdr} returns all of
@end example
@end defun
@defun last list &optional n
This function reruns the last link of the given @var{list}. The
@code{car} of this link is the list's last element. If @var{list} is
null, @code{nil} is returned. If @var{n} is non-nil the
@var{n}-th-to-last link is returned instead, or the whole @var{list} if
@var{n} is bigger than @var{list}'s length.
@end defun
@defun safe-length list
This function returns the length of @var{list}, with no risk
of either an error or an infinite loop.