I've had this happening to me too.
Couldn't figure out wtf was going on.
Until somebody understands what's the problem is, you can(let [s (.sym
^clojure.lang.Keyword k)] ..) and call name on s
2012/10/22 JvJ <kfjwhee...@gmail.com>
> I'm getting a REALLY weird error. I'm trying to check if a set of
> keywords are all uppercase.
> When binding a value to 'res' in the let statement, I traverse a list of
> keywords. However, the calls to the name function on those
> keywords give nil. The debug print statement clearly shows that the class
> of k is a keyword, and yet its name is nil?
>
> I really don't get it.
>
>
> ;; Program
> (defn defrel-fn
> "Adds a relation definition to the *relations* map."
> [name keys]
> (let [res (every? (fn [k]
> (println "k: " (name k) ", " (class k)) ;; Added for
> debugging
> (= (name k) (.toUpperCase (name k)))) keys)
> ;; keys need to be all in uppercase letters!
> ;;_ (when-not res (throw (Exception. "Error. All keys must be
> upper-case.")))
> kns (apply hash-map (mapcat vector keys (range))) ;; represents a
> map of keys to indices
> ]
> (swap! *relations*
> assoc name {:fields kns
> :unfields (vec keys) ;; A map of indices to keys is
> best represented as a vector
> })))
>
> ;; Output from repl
> => (worldrep.core/defrel-fn 'mother [:SELF :CHILD])
> k: nil , clojure.lang.Keyword
> NullPointerException clojure.lang.Reflector.invokeNoArgInstanceMember
> (Reflector.java:314)
>
> --
> 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 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
