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That's because this is actually ClojureScript (JS under the hood) running as a browser library. If you try that in Clojure, you'll get: > ClassCastException c

That's because this is actually ClojureScript (JS under the hood) running as a browser library. If you try that in Clojure, you'll get: > ClassCastException class clojure.lang.PersistentList cannot be cast to class java.lang.Number If you try it in a "proper" ClojureScript dev environment (shadow-cljs), you get nil as a result with this warning: > cljs.core/+, all arguments must be numbers, got [number cljs.core/IList] instead

parhamn 2y ago
Thats actually good to know, I thought this was reflective of Clojure itself.
- yladiz 2y ago
  In a way it is, since Clojure typically both compiles but doesn’t really hide its connection to either Java or JS, so you can’t ignore the underlying target language.