On Jun 2, 2014, at 4:53 PM, Erlis Vidal <er...@erlisvidal.com> wrote:

> Hi guys, 
> 
> Quick question about exercise 47, http://www.4clojure.com/problem/47
> 
> Here you could find the following
> 
> (not (contains? '(1 2 4)  __)
> 
> If I try to execute it in my REPL it gives the following error: 
> 
>  contains? not supported on type: clojure.lang.PersistentList
> 
> Was this a change of recent clojure versions? Why? 

Yes, it changed in Clojure 1.5.

The rationale is here: http://dev.clojure.org/jira/browse/CLJ-932

--Steve

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