Your function is essentially:
(= (map count coll) 1)
So you're applying the function "count" to each element in the collection.
Let's say your collection is:
[1 2 3]
Then you're trying to evaluate:
[(count 1) (count 2) (count 3)]
Clojure is raising an exception that says "I can't count a number, I can
only count collections".
- James
On 9 May 2014 17:42, Roelof Wobben <rwob...@hotmail.com> wrote:
> 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
>
> --
> You received this message because you are subscribed to the Google
> Groups "Clojure" group.
> To post to this group, send email to clojure@googlegroups.com
> Note that posts from new members are moderated - please be patient with
> your first post.
> To unsubscribe from this group, send email to
> clojure+unsubscr...@googlegroups.com
> For more options, visit this group at
> http://groups.google.com/group/clojure?hl=en
> ---
> You received this message because you are subscribed to the Google Groups
> "Clojure" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to clojure+unsubscr...@googlegroups.com.
> For more options, visit https://groups.google.com/d/optout.
>
--
You received this message because you are subscribed to the Google
Groups "Clojure" group.
To post to this group, send email to clojure@googlegroups.com
Note that posts from new members are moderated - please be patient with your
first post.
To unsubscribe from this group, send email to
clojure+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/clojure?hl=en
---
You received this message because you are subscribed to the Google Groups
"Clojure" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to clojure+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
