Joy and Marianna have written two different sets of code to accomplish the same goal of helping a caterer direct people with dietary restrictions to a menu item that works for them. Look at the code below.
Joy’s Code:
(define (entree diet)
(cond
[(string=? diet "gluten-free") salmon]
[(string=? diet "kosher") salmon]
[(string=? diet "lactose-int") salmon]
[(string=? diet "nut allergy") lasagna]
[(string=? diet "vegan") stir-fry]
[(string=? diet "vegetarian") stir-fry]
[else (text "unknown diet" 20 "red")])
Marianna’s Code:
(define (entree diet)
(cond
[(or (or (string=? diet "gluten-free") (string=? diet "kosher")) (string=? diet "lactose-int")) salmon]
[(or (string=? diet "vegan") (string=? diet "vegetarian")) stir-fry]
[else (text "unknown diet" 20 "red")])
Whose method do you like better? Why?
These materials were developed partly through support of the National Science Foundation,
(awards 1042210, 1535276, 1648684, and 1738598). 
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