Is there an idiomatic way of determining if a LazySeq contains an element? As of Clojure 1.5 calling contains? throws an IllegalArgumentException:

IllegalArgumentException contains? not supported on type: clojure.lang.LazySeq      
clojure.lang.RT.contains (RT.java:724)

Before 1.5, as far as I know, it always returned false.

I know that calling contains? on a LazySeq may never return as it can be infinite. But what if I know it isn't and don't care if it is evaluated eagerly?

What I came up with is:

(defn lazy-contains? [col key]
  (not (empty? (filter #(= key %) col))))

But it doesn't feel quite right. Is there a better way?

clojure lazy-sequences
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