Issue with Clojure 'contains'

Question

I am going through some Clojure tutorials using Closure Box, and entered the following code:

user> (def stooges (vector \"Moe\" \"Larry\" \"Curly\"))
#\'u         


        

Answer 1

contains? support Set, if you use clojure-1.4

user=> (contains? #{:a, :b} :a)
true

user=> (contains? (set stooges) "Moe")
true