How does one reduce a list of boolean values in Common Lisp?

Question

Given a list of values, I want to reduce the list to T if all the elements are not NIL, NIL if not. This gives me an error:

(apply #\'and (get-some-list))
         


        

Answer 1

#'and is invalid because and is a macro, not a function.

You can get around having to define a named function, by using a lambda:

(reduce (lambda (x y) (and x y)) (get-some-list) :initial-value t)

There's no shortcut like #' though.

Alternatively you can also use every with the identify function as the predicate.