undefined

pattern_matching_example.nu

;; Issac Trotts' demonstration of pattern matching in Nu

(function people-to-string (people)
     (match people
            (() "no people")
            ((p1) "one person: #{p1}")
            ((p1 p2) "two people: #{p1} and #{p2}")
            (else "too many people: #{(people length)}")))
            
(assert_equal "no people"
     (people-to-string '()))
     
(assert_equal "one person: Tim"
     (people-to-string '(Tim)))

(assert_equal "two people: Tim and Matz"
     (people-to-string '(Tim Matz)))

(assert_equal "too many people: 3"
     (people-to-string '(Tim Guido Matz)))