

                                                                collect-first
                                                                 collect-last
                                                                  collect-nth

    FUNCTION
COLLECT-FIRST ITEMS &optional (DEFAULT NIL)                      [Function]
COLLECT-LAST ITEMS &optional (DEFAULT NIL)                       [Function]
COLLECT-NTH N ITEMS &optional (DEFAULT NIL)                      [Function]

    Package
    series

    DESCRIPTION

Given a series ITEMS, these functions return the first element, the last
element, and the Nth element, respectively.  If ITEMS has no elements (or
no Nth element), DEFAULT is returned.  If DEFAULT is not specified, then
NIL is used for DEFAULT.

(COLLECT-FIRST #Z() 'Z) => Z 
(COLLECT-LAST #Z(A B C)) => C 
(COLLECT-NTH 1 #Z(A B C)) => B


     SEE ALSO
     about-series
     about-generators

;Copyright 1989 by the Massachusetts Institute of Technology,
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