lisp - Delete all Occurences -


delete occurrences problem 5 (0 / 32)

define function deleteall has 2 input argument x , l, x atom , l list contains atomic elements , sublists level, , function returns list occurrences of x deleted list l.

i have problem when list has sublists. cant go recursively in sublists check whether has contains duplicate or not.

(defun deleteall (x l)     (cond       ((null l) nil)       ((not(atom(car l))) (deleteall x (cdr l)))       ((not(eq x (car l))) (cons (car l) (deleteall x (cdr l ))))       (t(deleteall x (cdr l)))))

in second term know predicate got list in first element. should same third consequent except need process car cdr.


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