Function SECOND-ITEM

• Defined in theory: Kif-extensions
• Source code: kif-extensions.lisp

Slots on this function:

Documentation:

returns the second item in the specified list. If the length of the list is 0 or 1, this function is undefined. This is different from Lisp's SECOND function, which returns NIL, which means both false and null list.

Instance-Of: Function

Arity: 2

Other Related Axioms:

(<- (Second-Item ?List)
    (If (And (List ?List) (Not (Null (Rest ?List))))
        (First (Rest ?List))))