I think I am thinking too imperatively and not declaratively

[Willard Hagen]

Is this a declarative function?

(define (prime?/fast n)

      (define myprime #t)

      (for-each

      (λ (x) (if (and (not (eq? n x)) (zero? (modulo n x))) (set! myprime #f) empty)) (list 2 3 5 7))

      myprime

  )

[Jay McCarthy]

No. You can tell because you are using for-each which is only called
for effect and set! which is an effect.

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--
Jay McCarthy <j...@cs.byu.edu>
Assistant Professor / Brigham Young University
http://faculty.cs.byu.edu/~jay

"The glory of God is Intelligence" - D&C 93

[Jay McCarthy]

Ye

On Tue, Dec 10, 2013 at 9:39 PM, Willard Hagen <willar...@gmail.com> wrote:
> So using maps would be a sign of thinking declaratively?

> --
> -Willard