In an program I used the result of keys as an argument for a function which verifies whether an object is in a passed collection or not. The result I got was following Exception: IllegalArgumentException contains? not supported on type: clojure.lang.APersistentMap$KeySeq clojure.lang.RT.contains (RT.java:724)
What are the reasons behind this Exception? In the documentation of contains? it is written, that "Returns true if key is present in the given collection, otherwise returns false." The examples on this page (http://clojuredocs.org/clojure_core/clojure.core/contains_q) and the parameter description indicates, that contains? accept any collection as argument. The result of keys is also a collection => (coll? (keys {:a "f" :b 23})) true So is this a bug or is there a reason behind the fact, that contains? does not accept any collection? Or is the documentation wrong and it should nor be a collection as argument but a set or a vector? Because I get the same Exception for a list, but not for a vector. The same for lists, which returns also true for coll?. => (coll? '(1 2 3 4)) true => (contains? '(1 2 3 4) 3) IllegalArgumentException contains? not supported on type: clojure.lang.PersistentList clojure.lang.RT.contains (RT.java:724) => (contains? [1 2 3 4] 3) true -- -- 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/groups/opt_out.
