CODEWITHSUNDEEP
clojurearity
Sibi
Sibi

Reputation: 48766

Arity Overloading in Clojure

Why is the following function not working in Clojure:

(defn tests
  [] 0
  [a b] 1)

It gives the following error: clojure.lang.Compiler$CompilerException: java.lang.RuntimeException: Unable to resolve symbol: a in this context

Upvotes: 2

Views: 2112

Answers (2)

a.k
a.k

Reputation: 1203

If you want more than 2x var's, use & more:

(defn maxz
  "Returns the greatest of the nums."
  ([x] x)
  ([x y] (if (> x y) x y))
  ([x y & more]
   (reduce maxz (maxz x y) more)))

(maxz 1 2 3 4 5 100 6)

=> 100

Upvotes: 0

A. Webb
A. Webb

Reputation: 26446

Each needs to be surrounded by parentheses

(defn tests 
  ([] 0) 
  ([a b] 1))

Upvotes: 9

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