Strictly speaking lists are not sets but they can be treated as such and
common lisp offers some functions that can help you to do so. Some of
the functions you will want to research are intersection, union and
set-difference. Look these functions up and learn how they work and
determine which one you think you will need. Then together with defun
you should be able to build the predicate your homework assignment
requires.
Dave
<netian.com at edkim1> wrote:
> hello, nice to meet you
>
> i am a korean student, writing this e-mail from korea ^.^
>
> nowdays, i am studying about lisp (I USEING XLISP)
>
> In koera, there is not many studying students about lisp.
>
> (sorry, my english is very poor)
>
> i have a lisp exercise, but i can't solve it
>
> so, i belive , i wanner belive, you can help me...
>
> please, please, i wanner receive your reply.
>
> thank you for your reading, good night!! (now, in koera, it is night)
>
> question)
> Write a function, Intersectp, which is a predicate that tests
> whether 2sets have any elements in common. it should return nil
> if they have no elements in common.
>
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