oke, Then I have to fnd another way to see how many times a number is present in a collection. I thought count could do that.
Roelof Op vrijdag 9 mei 2014 20:24:29 UTC+2 schreef James Reeves: > 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 <rwo...@hotmail.com <javascript:>>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 clo...@googlegroups.com<javascript:> >> Note that posts from new members are moderated - please be patient with >> your first post. >> To unsubscribe from this group, send email to >> clojure+u...@googlegroups.com <javascript:> >> 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+u...@googlegroups.com <javascript:>. >> 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.
