I try to make this assigment :
Write the function (contains-duplicates? sequence) that takes a sequence as
a parameter and returns true if sequence contains some element multiple
times. Otherwise it returns false.
So I did this :
(defn contains-duplicates? [a-seq]
(let [element (fn element [a-seq] (count a-seq) )]
(= (map element a-seq)1)))
But then I see this message : UnsupportedOperationException count not
supported on this type: Long clojure.lang.RT.countFrom (RT.java:556)
When I change map to apply I see this message : ArityException Wrong number
of args (5) passed to: structured-data$contains-duplicates-QMARK-$element
clojure.lang.AFn.throwArity (AFn.java:437)
Where did I misunderstood this page :
http://iloveponies.github.io/120-hour-epic-sax-marathon/structured-data.html
Roelof
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