Sorted maps sort their keys, but keywords and strings are not comparable:
(sorted-map "a" 1 :b 2)
ClassCastException java.lang.String cannot be cast to clojure.lang.Keyword
clojure.lang.Keyword.compareTo (Keyword.java:114)
On Thursday, April 28, 2016 at 3:54:33 PM UTC-5, JPatrick Davenport wrote:
>
> Hello,
> Please explain to me what's going on here. The first code snippet causes
> the following error: "ClassCastException clojure.lang.Keyword cannot be
> cast to java.lang.String java.lang.String.compareTo (String.java:111)" The
> second code snippet doesn't. My understanding is that a *map* is a *map*.
>
>
> First:
>
>
> (let [s (apply sorted-map '(:a :b, :c {:d :e}))
> c (assoc {} :payload s)]
> (clojure.set/rename-keys (:payload c) {:a "a"}))
>
>
> Second:
> (let [s (apply hash-map '(:a :b, :c {:d :e}))
> c (assoc {} :payload s)]
> (clojure.set/rename-keys (:payload c) {:a "a"}))
>
>
> Thanks,
>
> JPD
>
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