Also, I really appreciate anyone who takes the time to answer. My company
is currently evaluating Clojure. I'm trying to determine if this is
non-idiomatic use of the language or some other issue. Doing something like
this can cause the bug to occur without directly calling seq on a vector:
(defn bar [my-list n]
(if (= n 0)
(peek my-list)
(bar (rest my-list) (dec n))))
(bar [1 2 3] 1)
Both rest and peek work on a vector without a problem but the combination
of the two causes problems.
On Thursday, June 20, 2013 3:54:43 PM UTC-4, Jason Gilman wrote:
>
> Why does (peek (seq [1])) result in:
> ClassCastException clojure.lang.PersistentVector$ChunkedSeq cannot be cast
> to clojure.lang.IPersistentStack clojure.lang.RT.peek (RT.java:634)
>
> Peek documentation "For a list or queue, same as first, for a vector, same
> as, but much more efficient than, last. If the collection is empty, returns
> nil." implies that there shouldn't be a problem working with vectors.
>
> This works without issue:
> (peek [1])
>
> This is on Clojure 1.5.1
>
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