I had some code that adapted to functions that returned either a map or a
seq of maps.

I was using (seq?) and (map?) to analyze the return value.

It then blew up when a function returned a clojure.lang.IPersistentVector.

Fortunately, (sequential?) is a super-set of (seq?) and matched this
properly.

But that begs the question: why does (seq?) exist, and should it ever be
used (in end-user code?)

Thanks!

-- 
Howard M. Lewis Ship

Creator of Apache Tapestry
Director of Open Source Technology at Formos

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