On Fri, Oct 30, 2009 at 9:36 PM, Josh Daghlian <daghl...@gmail.com> wrote:

>
> Although I suppose this isn't too surprising:
>
> user> (second y)
> --> ConcurrentModificationException


Eeeuw. Guess it uses an Iterator to generate the elements for the lazy seq.
For ArrayList, walking it by index would avoid this. For LinkedList it would
make it O(n) as well though.

Mutable collections really don't play nice with Clojure seqs.

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